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<h1>Source code for rdflib.plugins.stores.sparqlstore</h1><div class="highlight"><pre>
<span class="c"># -*- coding: utf-8 -*-</span>
<span class="c">#</span>
<span class="sd">"""</span>
<span class="sd">This is an RDFLib store around Ivan Herman et al.'s SPARQL service wrapper.</span>
<span class="sd">This was first done in layer-cake, and then ported to RDFLib 3 and rdfextras</span>
<span class="sd">This version works with vanilla SPARQLWrapper installed by ``easy_install``,</span>
<span class="sd">``pip`` or similar. If you installed ``rdflib`` with a tool that understands</span>
<span class="sd">dependencies, it should have been installed automatically for you.</span>
<span class="sd">Changes:</span>
<span class="sd"> - Layercake adding support for namespace binding, I removed it again to</span>
<span class="sd"> work with vanilla SPARQLWrapper</span>
<span class="sd"> - JSON object mapping support suppressed</span>
<span class="sd"> - Replaced '4Suite-XML Domlette with Elementtree</span>
<span class="sd"> - Incorporated as an RDFLib store</span>
<span class="sd">"""</span>
<span class="n">SPARQL_POST_UPDATE</span> <span class="o">=</span> <span class="s">"application/sparql-update"</span>
<span class="n">SPARQL_POST_ENCODED</span> <span class="o">=</span> <span class="s">"application/x-www-form-urlencoded; charset=UTF-8"</span>
<span class="c"># Defines some SPARQL keywords</span>
<span class="n">LIMIT</span> <span class="o">=</span> <span class="s">'LIMIT'</span>
<span class="n">OFFSET</span> <span class="o">=</span> <span class="s">'OFFSET'</span>
<span class="n">ORDERBY</span> <span class="o">=</span> <span class="s">'ORDER BY'</span>
<span class="kn">import</span> <span class="nn">re</span>
<span class="c"># import warnings</span>
<span class="k">try</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">SPARQLWrapper</span> <span class="kn">import</span> <span class="n">SPARQLWrapper</span><span class="p">,</span> <span class="n">XML</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span>
<span class="s">"SPARQLWrapper not found! SPARQL Store will not work."</span> <span class="o">+</span>
<span class="s">"Install with 'easy_install SPARQLWrapper'"</span><span class="p">)</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="k">if</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">sys</span><span class="p">,</span> <span class="s">'pypy_version_info'</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> \
<span class="ow">or</span> <span class="n">sys</span><span class="o">.</span><span class="n">platform</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s">'java'</span><span class="p">)</span> \
<span class="ow">or</span> <span class="n">sys</span><span class="o">.</span><span class="n">version_info</span><span class="p">[:</span><span class="mi">2</span><span class="p">]</span> <span class="o"><</span> <span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="mi">6</span><span class="p">):</span>
<span class="c"># import elementtree as etree</span>
<span class="kn">from</span> <span class="nn">elementtree</span> <span class="kn">import</span> <span class="n">ElementTree</span>
<span class="k">assert</span> <span class="n">ElementTree</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">xml.etree</span> <span class="kn">import</span> <span class="n">ElementTree</span>
<span class="k">assert</span> <span class="n">ElementTree</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">elementtree</span> <span class="kn">import</span> <span class="n">ElementTree</span>
<span class="kn">from</span> <span class="nn">rdflib.plugins.stores.regexmatching</span> <span class="kn">import</span> <span class="n">NATIVE_REGEX</span>
<span class="kn">from</span> <span class="nn">rdflib.store</span> <span class="kn">import</span> <span class="n">Store</span>
<span class="kn">from</span> <span class="nn">rdflib.query</span> <span class="kn">import</span> <span class="n">Result</span>
<span class="kn">from</span> <span class="nn">rdflib</span> <span class="kn">import</span> <span class="n">Variable</span><span class="p">,</span> <span class="n">Namespace</span><span class="p">,</span> <span class="n">BNode</span><span class="p">,</span> <span class="n">URIRef</span><span class="p">,</span> <span class="n">Literal</span>
<span class="kn">import</span> <span class="nn">httplib</span>
<span class="kn">import</span> <span class="nn">urlparse</span>
<div class="viewcode-block" id="NSSPARQLWrapper"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.NSSPARQLWrapper">[docs]</a><span class="k">class</span> <span class="nc">NSSPARQLWrapper</span><span class="p">(</span><span class="n">SPARQLWrapper</span><span class="p">):</span>
<span class="n">nsBindings</span> <span class="o">=</span> <span class="p">{}</span>
<div class="viewcode-block" id="NSSPARQLWrapper.setNamespaceBindings"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.NSSPARQLWrapper.setNamespaceBindings">[docs]</a> <span class="k">def</span> <span class="nf">setNamespaceBindings</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bindings</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> A shortcut for setting namespace bindings that will be added</span>
<span class="sd"> to the prolog of the query</span>
<span class="sd"> @param bindings: A dictionary of prefixs to URIs</span>
<span class="sd"> """</span>
<span class="bp">self</span><span class="o">.</span><span class="n">nsBindings</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">bindings</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="NSSPARQLWrapper.setQuery"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.NSSPARQLWrapper.setQuery">[docs]</a> <span class="k">def</span> <span class="nf">setQuery</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Set the SPARQL query text. Note: no check is done on the</span>
<span class="sd"> validity of the query (syntax or otherwise) by this module,</span>
<span class="sd"> except for testing the query type (SELECT, ASK, etc).</span>
<span class="sd"> Syntax and validity checking is done by the SPARQL service itself.</span>
<span class="sd"> @param query: query text</span>
<span class="sd"> @type query: string</span>
<span class="sd"> @bug: #2320024</span>
<span class="sd"> """</span>
<span class="bp">self</span><span class="o">.</span><span class="n">queryType</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parseQueryType</span><span class="p">(</span><span class="n">query</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">queryString</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">injectPrefixes</span><span class="p">(</span><span class="n">query</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="NSSPARQLWrapper.injectPrefixes"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.NSSPARQLWrapper.injectPrefixes">[docs]</a> <span class="k">def</span> <span class="nf">injectPrefixes</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">):</span>
<span class="k">return</span> <span class="s">'</span><span class="se">\n</span><span class="s">'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span>
<span class="p">[</span><span class="s">'</span><span class="se">\n</span><span class="s">'</span><span class="o">.</span><span class="n">join</span><span class="p">([</span><span class="s">'PREFIX </span><span class="si">%s</span><span class="s">: <</span><span class="si">%s</span><span class="s">>'</span> <span class="o">%</span> <span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">val</span><span class="p">)</span>
<span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">val</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">nsBindings</span><span class="o">.</span><span class="n">items</span><span class="p">()]),</span>
<span class="n">query</span><span class="p">])</span>
</div></div>
<span class="n">BNODE_IDENT_PATTERN</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="s">'(?P<label>_\:[^\s]+)'</span><span class="p">)</span>
<span class="n">SPARQL_NS</span> <span class="o">=</span> <span class="n">Namespace</span><span class="p">(</span><span class="s">'http://www.w3.org/2005/sparql-results#'</span><span class="p">)</span>
<span class="n">sparqlNsBindings</span> <span class="o">=</span> <span class="p">{</span><span class="s">u'sparql'</span><span class="p">:</span> <span class="n">SPARQL_NS</span><span class="p">}</span>
<span class="n">ElementTree</span><span class="o">.</span><span class="n">_namespace_map</span><span class="p">[</span><span class="s">"sparql"</span><span class="p">]</span> <span class="o">=</span> <span class="n">SPARQL_NS</span>
<div class="viewcode-block" id="TraverseSPARQLResultDOM"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.TraverseSPARQLResultDOM">[docs]</a><span class="k">def</span> <span class="nf">TraverseSPARQLResultDOM</span><span class="p">(</span><span class="n">doc</span><span class="p">,</span> <span class="n">asDictionary</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Returns a generator over tuples of results</span>
<span class="sd"> """</span>
<span class="c"># namespace handling in elementtree xpath sub-set is not pretty :(</span>
<span class="nb">vars</span> <span class="o">=</span> <span class="p">[</span><span class="n">Variable</span><span class="p">(</span><span class="n">v</span><span class="o">.</span><span class="n">attrib</span><span class="p">[</span><span class="s">"name"</span><span class="p">])</span> <span class="k">for</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">doc</span><span class="o">.</span><span class="n">findall</span><span class="p">(</span>
<span class="s">'./{http://www.w3.org/2005/sparql-results#}head/'</span> <span class="o">+</span>
<span class="s">'{http://www.w3.org/2005/sparql-results#}variable'</span><span class="p">)]</span>
<span class="k">for</span> <span class="n">result</span> <span class="ow">in</span> <span class="n">doc</span><span class="o">.</span><span class="n">findall</span><span class="p">(</span>
<span class="s">'./{http://www.w3.org/2005/sparql-results#}results/'</span> <span class="o">+</span>
<span class="s">'{http://www.w3.org/2005/sparql-results#}result'</span><span class="p">):</span>
<span class="n">currBind</span> <span class="o">=</span> <span class="p">{}</span>
<span class="n">values</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">binding</span> <span class="ow">in</span> <span class="n">result</span><span class="o">.</span><span class="n">findall</span><span class="p">(</span>
<span class="s">'{http://www.w3.org/2005/sparql-results#}binding'</span><span class="p">):</span>
<span class="n">varVal</span> <span class="o">=</span> <span class="n">binding</span><span class="o">.</span><span class="n">attrib</span><span class="p">[</span><span class="s">"name"</span><span class="p">]</span>
<span class="n">var</span> <span class="o">=</span> <span class="n">Variable</span><span class="p">(</span><span class="n">varVal</span><span class="p">)</span>
<span class="n">term</span> <span class="o">=</span> <span class="n">CastToTerm</span><span class="p">(</span><span class="n">binding</span><span class="o">.</span><span class="n">findall</span><span class="p">(</span><span class="s">'*'</span><span class="p">)[</span><span class="mi">0</span><span class="p">])</span>
<span class="n">values</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">term</span><span class="p">)</span>
<span class="n">currBind</span><span class="p">[</span><span class="n">var</span><span class="p">]</span> <span class="o">=</span> <span class="n">term</span>
<span class="k">if</span> <span class="n">asDictionary</span><span class="p">:</span>
<span class="k">yield</span> <span class="n">currBind</span><span class="p">,</span> <span class="nb">vars</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">def</span> <span class="nf">__locproc</span><span class="p">(</span><span class="n">values</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">values</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
<span class="k">return</span> <span class="n">values</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">values</span><span class="p">)</span>
<span class="k">yield</span> <span class="n">__locproc</span><span class="p">(</span><span class="n">values</span><span class="p">),</span> <span class="nb">vars</span>
</div>
<div class="viewcode-block" id="localName"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.localName">[docs]</a><span class="k">def</span> <span class="nf">localName</span><span class="p">(</span><span class="n">qname</span><span class="p">):</span>
<span class="c"># wtf - elementtree cant do this for me</span>
<span class="k">return</span> <span class="n">qname</span><span class="p">[</span><span class="n">qname</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="s">"}"</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span><span class="p">:]</span>
</div>
<div class="viewcode-block" id="CastToTerm"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.CastToTerm">[docs]</a><span class="k">def</span> <span class="nf">CastToTerm</span><span class="p">(</span><span class="n">node</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Helper function that casts XML node in SPARQL results</span>
<span class="sd"> to appropriate rdflib term</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">tag</span> <span class="o">==</span> <span class="s">'{</span><span class="si">%s</span><span class="s">}bnode'</span> <span class="o">%</span> <span class="n">SPARQL_NS</span><span class="p">:</span>
<span class="k">return</span> <span class="n">BNode</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">text</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">node</span><span class="o">.</span><span class="n">tag</span> <span class="o">==</span> <span class="s">'{</span><span class="si">%s</span><span class="s">}uri'</span> <span class="o">%</span> <span class="n">SPARQL_NS</span><span class="p">:</span>
<span class="k">return</span> <span class="n">URIRef</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">text</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">node</span><span class="o">.</span><span class="n">tag</span> <span class="o">==</span> <span class="s">'{</span><span class="si">%s</span><span class="s">}literal'</span> <span class="o">%</span> <span class="n">SPARQL_NS</span><span class="p">:</span>
<span class="k">if</span> <span class="s">'datatype'</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">attrib</span><span class="p">:</span>
<span class="n">dT</span> <span class="o">=</span> <span class="n">URIRef</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">attrib</span><span class="p">[</span><span class="s">'datatype'</span><span class="p">])</span>
<span class="k">if</span> <span class="bp">False</span><span class="p">:</span> <span class="c"># not node.xpath('*'):</span>
<span class="k">return</span> <span class="n">Literal</span><span class="p">(</span><span class="s">''</span><span class="p">,</span> <span class="n">datatype</span><span class="o">=</span><span class="n">dT</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="n">Literal</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">text</span><span class="p">,</span> <span class="n">datatype</span><span class="o">=</span><span class="n">dT</span><span class="p">)</span>
<span class="k">elif</span> <span class="s">'{http://www.w3.org/XML/1998/namespace}lang'</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">attrib</span><span class="p">:</span>
<span class="k">return</span> <span class="n">Literal</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">text</span><span class="p">,</span> <span class="n">lang</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">attrib</span><span class="p">[</span>
<span class="s">"{http://www.w3.org/XML/1998/namespace}lang"</span><span class="p">])</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="n">Literal</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">text</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">'Unknown answer type'</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLStore"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore">[docs]</a><span class="k">class</span> <span class="nc">SPARQLStore</span><span class="p">(</span><span class="n">NSSPARQLWrapper</span><span class="p">,</span> <span class="n">Store</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> An RDFLib store around a SPARQL endpoint</span>
<span class="sd"> This is in theory context-aware, and should work OK</span>
<span class="sd"> when the context is specified. (I.e. for Graph objects)</span>
<span class="sd"> then all queries should work against the named graph with the</span>
<span class="sd"> identifier of the graph only.</span>
<span class="sd"> For ConjunctiveGraphs, reading is done from the "default graph"</span>
<span class="sd"> Exactly what this means depends on your endpoint.</span>
<span class="sd"> General SPARQL does not offer a simple way to query the</span>
<span class="sd"> union of all graphs.</span>
<span class="sd"> Fuseki/TDB has a flag for specifying that the default graph</span>
<span class="sd"> is the union of all graphs (tdb:unionDefaultGraph in the Fuseki config)</span>
<span class="sd"> If this is set this will work fine.</span>
<span class="sd"> .. warning:: The SPARQL Store does not support blank-nodes!</span>
<span class="sd"> As blank-nodes acts as variables in SPARQL queries</span>
<span class="sd"> there is no way to query for a particular blank node.</span>
<span class="sd"> See http://www.w3.org/TR/sparql11-query/#BGPsparqlBNodes</span>
<span class="sd"> """</span>
<span class="n">formula_aware</span> <span class="o">=</span> <span class="bp">False</span>
<span class="n">transaction_aware</span> <span class="o">=</span> <span class="bp">False</span>
<span class="n">regex_matching</span> <span class="o">=</span> <span class="n">NATIVE_REGEX</span>
<div class="viewcode-block" id="SPARQLStore.__init__"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.__init__">[docs]</a> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span>
<span class="n">endpoint</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">bNodeAsURI</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
<span class="n">sparql11</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span> <span class="n">context_aware</span><span class="o">=</span><span class="bp">True</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">endpoint</span><span class="p">:</span>
<span class="nb">super</span><span class="p">(</span><span class="n">SPARQLStore</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="n">endpoint</span><span class="p">,</span> <span class="n">returnFormat</span><span class="o">=</span><span class="n">XML</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">bNodeAsURI</span> <span class="o">=</span> <span class="n">bNodeAsURI</span>
<span class="bp">self</span><span class="o">.</span><span class="n">nsBindings</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">sparql11</span> <span class="o">=</span> <span class="n">sparql11</span>
<span class="bp">self</span><span class="o">.</span><span class="n">context_aware</span> <span class="o">=</span> <span class="n">context_aware</span>
<span class="c"># Database Management Methods</span></div>
<div class="viewcode-block" id="SPARQLStore.create"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.create">[docs]</a> <span class="k">def</span> <span class="nf">create</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">configuration</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s">'The SPARQL store is read only'</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLStore.open"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.open">[docs]</a> <span class="k">def</span> <span class="nf">open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">configuration</span><span class="p">,</span> <span class="n">create</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> sets the endpoint URL for this SPARQLStore</span>
<span class="sd"> if create==True an exception is thrown.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">create</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"Cannot create a SPARQL Endpoint"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">query_endpoint</span> <span class="o">=</span> <span class="n">configuration</span>
</div>
<span class="k">def</span> <span class="nf">__set_query_endpoint</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">queryEndpoint</span><span class="p">):</span>
<span class="nb">super</span><span class="p">(</span><span class="n">SPARQLStore</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="n">queryEndpoint</span><span class="p">,</span> <span class="n">returnFormat</span><span class="o">=</span><span class="n">XML</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">endpoint</span> <span class="o">=</span> <span class="n">queryEndpoint</span>
<span class="k">def</span> <span class="nf">__get_query_endpoint</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">endpoint</span>
<span class="n">query_endpoint</span> <span class="o">=</span> <span class="nb">property</span><span class="p">(</span><span class="n">__get_query_endpoint</span><span class="p">,</span> <span class="n">__set_query_endpoint</span><span class="p">)</span>
<div class="viewcode-block" id="SPARQLStore.destroy"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.destroy">[docs]</a> <span class="k">def</span> <span class="nf">destroy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">configuration</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> FIXME: Add documentation</span>
<span class="sd"> """</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s">'The SPARQL store is read only'</span><span class="p">)</span>
<span class="c"># Transactional interfaces</span></div>
<div class="viewcode-block" id="SPARQLStore.commit"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.commit">[docs]</a> <span class="k">def</span> <span class="nf">commit</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">""" """</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s">'The SPARQL store is read only'</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLStore.rollback"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.rollback">[docs]</a> <span class="k">def</span> <span class="nf">rollback</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">""" """</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s">'The SPARQL store is read only'</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLStore.add"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.add">[docs]</a> <span class="k">def</span> <span class="nf">add</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">obj</span><span class="p">),</span> <span class="n">context</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
<span class="sd">""" Add a triple to the store of triples. """</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s">'The SPARQL store is read only'</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLStore.addN"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.addN">[docs]</a> <span class="k">def</span> <span class="nf">addN</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">quads</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Adds each item in the list of statements to a specific context.</span>
<span class="sd"> The quoted argument is interpreted by formula-aware stores to</span>
<span class="sd"> indicate this statement is quoted/hypothetical.</span>
<span class="sd"> Note that the default implementation is a redirect to add.</span>
<span class="sd"> """</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s">'The SPARQL store is read only'</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLStore.remove"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.remove">[docs]</a> <span class="k">def</span> <span class="nf">remove</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">obj</span><span class="p">),</span> <span class="n">context</span><span class="p">):</span>
<span class="sd">""" Remove a triple from the store """</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s">'The SPARQL store is read only'</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLStore.query"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.query">[docs]</a> <span class="k">def</span> <span class="nf">query</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">,</span>
<span class="n">initNs</span><span class="o">=</span><span class="p">{},</span>
<span class="n">initBindings</span><span class="o">=</span><span class="p">{},</span>
<span class="n">queryGraph</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span>
<span class="n">DEBUG</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">debug</span> <span class="o">=</span> <span class="n">DEBUG</span>
<span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="nb">basestring</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setNamespaceBindings</span><span class="p">(</span><span class="n">initNs</span><span class="p">)</span>
<span class="k">if</span> <span class="n">initBindings</span><span class="p">:</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">sparql11</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span>
<span class="s">"initBindings not supported for SPARQL 1.0 Endpoints."</span><span class="p">)</span>
<span class="n">v</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">initBindings</span><span class="p">)</span>
<span class="c"># VALUES was added to SPARQL 1.1 on 2012/07/24</span>
<span class="n">query</span> <span class="o">+=</span> <span class="s">"</span><span class="se">\n</span><span class="s">VALUES ( </span><span class="si">%s</span><span class="s"> )</span><span class="se">\n</span><span class="s">{ ( </span><span class="si">%s</span><span class="s"> ) }</span><span class="se">\n</span><span class="s">"</span>\
<span class="o">%</span> <span class="p">(</span><span class="s">" "</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="s">"?"</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">x</span><span class="p">)</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">v</span><span class="p">),</span>
<span class="s">" "</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">initBindings</span><span class="p">[</span><span class="n">x</span><span class="p">]</span><span class="o">.</span><span class="n">n3</span><span class="p">()</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">v</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">resetQuery</span><span class="p">()</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">context_aware</span> <span class="ow">and</span> <span class="n">queryGraph</span> <span class="ow">and</span> <span class="n">queryGraph</span> <span class="o">!=</span> <span class="s">'__UNION__'</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">addDefaultGraph</span><span class="p">(</span><span class="n">queryGraph</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setQuery</span><span class="p">(</span><span class="n">query</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Result</span><span class="o">.</span><span class="n">parse</span><span class="p">(</span><span class="n">SPARQLWrapper</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">response</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLStore.triples"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.triples">[docs]</a> <span class="k">def</span> <span class="nf">triples</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">),</span> <span class="n">context</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> - tuple **(s, o, p)**</span>
<span class="sd"> the triple used as filter for the SPARQL select.</span>
<span class="sd"> (None, None, None) means anything.</span>
<span class="sd"> - context **context**</span>
<span class="sd"> the graph effectively calling this method.</span>
<span class="sd"> Returns a tuple of triples executing essentially a SPARQL like</span>
<span class="sd"> SELECT ?subj ?pred ?obj WHERE { ?subj ?pred ?obj }</span>
<span class="sd"> **context** may include three parameter</span>
<span class="sd"> to refine the underlying query:</span>
<span class="sd"> * LIMIT: an integer to limit the number of results</span>
<span class="sd"> * OFFSET: an integer to enable paging of results</span>
<span class="sd"> * ORDERBY: an instance of Variable('s'), Variable('o') or Variable('p')</span>
<span class="sd"> or, by default, the first 'None' from the given triple</span>
<span class="sd"> .. warning::</span>
<span class="sd"> - Using LIMIT or OFFSET automatically include ORDERBY otherwise this is</span>
<span class="sd"> because the results are retrieved in a not deterministic way (depends on</span>
<span class="sd"> the walking path on the graph)</span>
<span class="sd"> - Using OFFSET without defining LIMIT will discard the first OFFSET - 1</span>
<span class="sd"> results</span>
<span class="sd"> ``</span>
<span class="sd"> a_graph.LIMIT = limit</span>
<span class="sd"> a_graph.OFFSET = offset</span>
<span class="sd"> triple_generator = a_graph.triples(mytriple):</span>
<span class="sd"> #do something</span>
<span class="sd"> #Removes LIMIT and OFFSET if not required for the next triple() calls</span>
<span class="sd"> del a_graph.LIMIT</span>
<span class="sd"> del a_graph.OFFSET</span>
<span class="sd"> ``</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="p">(</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">BNode</span><span class="p">)</span> <span class="ow">or</span>
<span class="nb">isinstance</span><span class="p">(</span><span class="n">p</span><span class="p">,</span> <span class="n">BNode</span><span class="p">)</span> <span class="ow">or</span>
<span class="nb">isinstance</span><span class="p">(</span><span class="n">o</span><span class="p">,</span> <span class="n">BNode</span><span class="p">)</span> <span class="p">):</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"SPARQLStore does not support Bnodes! "</span>
<span class="s">"See http://www.w3.org/TR/sparql11-query/#BGPsparqlBNodes"</span><span class="p">)</span>
<span class="nb">vars</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">s</span><span class="p">:</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">Variable</span><span class="p">(</span><span class="s">'s'</span><span class="p">)</span>
<span class="nb">vars</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">s</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">p</span><span class="p">:</span>
<span class="n">p</span> <span class="o">=</span> <span class="n">Variable</span><span class="p">(</span><span class="s">'p'</span><span class="p">)</span>
<span class="nb">vars</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">p</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">o</span><span class="p">:</span>
<span class="n">o</span> <span class="o">=</span> <span class="n">Variable</span><span class="p">(</span><span class="s">'o'</span><span class="p">)</span>
<span class="nb">vars</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">o</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">vars</span><span class="p">:</span>
<span class="n">v</span> <span class="o">=</span> <span class="s">' '</span><span class="o">.</span><span class="n">join</span><span class="p">([</span><span class="n">term</span><span class="o">.</span><span class="n">n3</span><span class="p">()</span> <span class="k">for</span> <span class="n">term</span> <span class="ow">in</span> <span class="nb">vars</span><span class="p">])</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">v</span> <span class="o">=</span> <span class="s">'*'</span>
<span class="n">query</span> <span class="o">=</span> <span class="s">"SELECT </span><span class="si">%s</span><span class="s"> WHERE { </span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> }"</span> <span class="o">%</span> \
<span class="p">(</span><span class="n">v</span><span class="p">,</span> <span class="n">s</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span> <span class="n">p</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span> <span class="n">o</span><span class="o">.</span><span class="n">n3</span><span class="p">())</span>
<span class="c"># The ORDER BY is necessary</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">context</span><span class="p">,</span> <span class="n">LIMIT</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">context</span><span class="p">,</span> <span class="n">OFFSET</span><span class="p">)</span> \
<span class="ow">or</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">context</span><span class="p">,</span> <span class="n">ORDERBY</span><span class="p">):</span>
<span class="n">var</span> <span class="o">=</span> <span class="bp">None</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">Variable</span><span class="p">):</span>
<span class="n">var</span> <span class="o">=</span> <span class="n">s</span>
<span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">p</span><span class="p">,</span> <span class="n">Variable</span><span class="p">):</span>
<span class="n">var</span> <span class="o">=</span> <span class="n">p</span>
<span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">o</span><span class="p">,</span> <span class="n">Variable</span><span class="p">):</span>
<span class="n">var</span> <span class="o">=</span> <span class="n">o</span>
<span class="k">elif</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">context</span><span class="p">,</span> <span class="n">ORDERBY</span><span class="p">)</span> \
<span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="nb">getattr</span><span class="p">(</span><span class="n">context</span><span class="p">,</span> <span class="n">ORDERBY</span><span class="p">),</span> <span class="n">Variable</span><span class="p">):</span>
<span class="n">var</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">context</span><span class="p">,</span> <span class="n">ORDERBY</span><span class="p">)</span>
<span class="n">query</span> <span class="o">=</span> <span class="n">query</span> <span class="o">+</span> <span class="s">' </span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">ORDERBY</span><span class="p">,</span> <span class="n">var</span><span class="o">.</span><span class="n">n3</span><span class="p">())</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">query</span> <span class="o">=</span> <span class="n">query</span> <span class="o">+</span> <span class="s">' LIMIT </span><span class="si">%s</span><span class="s">'</span> <span class="o">%</span> <span class="nb">int</span><span class="p">(</span><span class="nb">getattr</span><span class="p">(</span><span class="n">context</span><span class="p">,</span> <span class="n">LIMIT</span><span class="p">))</span>
<span class="k">except</span> <span class="p">(</span><span class="ne">ValueError</span><span class="p">,</span> <span class="ne">TypeError</span><span class="p">,</span> <span class="ne">AttributeError</span><span class="p">):</span>
<span class="k">pass</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">query</span> <span class="o">=</span> <span class="n">query</span> <span class="o">+</span> <span class="s">' OFFSET </span><span class="si">%s</span><span class="s">'</span> <span class="o">%</span> <span class="nb">int</span><span class="p">(</span><span class="nb">getattr</span><span class="p">(</span><span class="n">context</span><span class="p">,</span> <span class="n">OFFSET</span><span class="p">))</span>
<span class="k">except</span> <span class="p">(</span><span class="ne">ValueError</span><span class="p">,</span> <span class="ne">TypeError</span><span class="p">,</span> <span class="ne">AttributeError</span><span class="p">):</span>
<span class="k">pass</span>
<span class="bp">self</span><span class="o">.</span><span class="n">resetQuery</span><span class="p">()</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">context_aware</span> <span class="ow">and</span> <span class="n">context</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">addDefaultGraph</span><span class="p">(</span><span class="n">context</span><span class="o">.</span><span class="n">identifier</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setQuery</span><span class="p">(</span><span class="n">query</span><span class="p">)</span>
<span class="n">doc</span> <span class="o">=</span> <span class="n">ElementTree</span><span class="o">.</span><span class="n">parse</span><span class="p">(</span><span class="n">SPARQLWrapper</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">response</span><span class="p">)</span>
<span class="c"># ElementTree.dump(doc)</span>
<span class="k">for</span> <span class="n">rt</span><span class="p">,</span> <span class="nb">vars</span> <span class="ow">in</span> <span class="n">TraverseSPARQLResultDOM</span><span class="p">(</span><span class="n">doc</span><span class="p">,</span> <span class="n">asDictionary</span><span class="o">=</span><span class="bp">True</span><span class="p">):</span>
<span class="k">yield</span> <span class="p">(</span><span class="n">rt</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">s</span><span class="p">),</span>
<span class="n">rt</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">p</span><span class="p">,</span> <span class="n">p</span><span class="p">),</span>
<span class="n">rt</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">o</span><span class="p">,</span> <span class="n">o</span><span class="p">)),</span> <span class="bp">None</span>
</div>
<div class="viewcode-block" id="SPARQLStore.triples_choices"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.triples_choices">[docs]</a> <span class="k">def</span> <span class="nf">triples_choices</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">object_</span><span class="p">),</span> <span class="n">context</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> A variant of triples that can take a list of terms instead of a</span>
<span class="sd"> single term in any slot. Stores can implement this to optimize</span>
<span class="sd"> the response time from the import default 'fallback' implementation,</span>
<span class="sd"> which will iterate over each term in the list and dispatch to</span>
<span class="sd"> triples.</span>
<span class="sd"> """</span>
<span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">(</span><span class="s">'Triples choices currently not supported'</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLStore.__len__"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.__len__">[docs]</a> <span class="k">def</span> <span class="nf">__len__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">sparql11</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">(</span>
<span class="s">"For performance reasons, this is not"</span> <span class="o">+</span>
<span class="s">"supported for sparql1.0 endpoints"</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">resetQuery</span><span class="p">()</span>
<span class="n">q</span> <span class="o">=</span> <span class="s">"SELECT (count(*) as ?c) WHERE {?s ?p ?o .}"</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">context_aware</span> <span class="ow">and</span> <span class="n">context</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">addDefaultGraph</span><span class="p">(</span><span class="n">context</span><span class="o">.</span><span class="n">identifier</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setQuery</span><span class="p">(</span><span class="n">q</span><span class="p">)</span>
<span class="n">doc</span> <span class="o">=</span> <span class="n">ElementTree</span><span class="o">.</span><span class="n">parse</span><span class="p">(</span><span class="n">SPARQLWrapper</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">response</span><span class="p">)</span>
<span class="n">rt</span><span class="p">,</span> <span class="nb">vars</span> <span class="o">=</span> <span class="nb">iter</span><span class="p">(</span>
<span class="n">TraverseSPARQLResultDOM</span><span class="p">(</span><span class="n">doc</span><span class="p">,</span> <span class="n">asDictionary</span><span class="o">=</span><span class="bp">True</span><span class="p">))</span><span class="o">.</span><span class="n">next</span><span class="p">()</span>
<span class="k">return</span> <span class="nb">int</span><span class="p">(</span><span class="n">rt</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">Variable</span><span class="p">(</span><span class="s">"c"</span><span class="p">)))</span>
</div>
<div class="viewcode-block" id="SPARQLStore.contexts"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.contexts">[docs]</a> <span class="k">def</span> <span class="nf">contexts</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">triple</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Iterates over results to SELECT ?NAME { GRAPH ?NAME { ?s ?p ?o } }</span>
<span class="sd"> returning instances of this store with the SPARQL wrapper</span>
<span class="sd"> object updated via addNamedGraph(?NAME)</span>
<span class="sd"> This causes a named-graph-uri key / value pair to be sent over</span>
<span class="sd"> the protocol</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">triple</span><span class="p">:</span>
<span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span> <span class="o">=</span> <span class="n">triple</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">p</span> <span class="o">=</span> <span class="n">o</span> <span class="o">=</span> <span class="bp">None</span>
<span class="n">params</span> <span class="o">=</span> <span class="p">((</span><span class="n">s</span> <span class="k">if</span> <span class="n">s</span> <span class="k">else</span> <span class="n">Variable</span><span class="p">(</span><span class="s">'s'</span><span class="p">))</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span>
<span class="p">(</span><span class="n">p</span> <span class="k">if</span> <span class="n">p</span> <span class="k">else</span> <span class="n">Variable</span><span class="p">(</span><span class="s">'p'</span><span class="p">))</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span>
<span class="p">(</span><span class="n">o</span> <span class="k">if</span> <span class="n">o</span> <span class="k">else</span> <span class="n">Variable</span><span class="p">(</span><span class="s">'o'</span><span class="p">))</span><span class="o">.</span><span class="n">n3</span><span class="p">())</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setQuery</span><span class="p">(</span>
<span class="s">'SELECT ?name WHERE { GRAPH ?name { </span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> }}'</span> <span class="o">%</span> <span class="n">params</span><span class="p">)</span>
<span class="n">doc</span> <span class="o">=</span> <span class="n">ElementTree</span><span class="o">.</span><span class="n">parse</span><span class="p">(</span><span class="n">SPARQLWrapper</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">response</span><span class="p">)</span>
<span class="k">return</span> <span class="p">(</span><span class="n">rt</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">Variable</span><span class="p">(</span><span class="s">"name"</span><span class="p">))</span>
<span class="k">for</span> <span class="n">rt</span><span class="p">,</span> <span class="nb">vars</span> <span class="ow">in</span> <span class="n">TraverseSPARQLResultDOM</span><span class="p">(</span><span class="n">doc</span><span class="p">,</span> <span class="n">asDictionary</span><span class="o">=</span><span class="bp">True</span><span class="p">))</span>
<span class="c"># Namespace persistence interface implementation</span></div>
<div class="viewcode-block" id="SPARQLStore.bind"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.bind">[docs]</a> <span class="k">def</span> <span class="nf">bind</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">namespace</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">nsBindings</span><span class="p">[</span><span class="n">prefix</span><span class="p">]</span> <span class="o">=</span> <span class="n">namespace</span>
</div>
<div class="viewcode-block" id="SPARQLStore.prefix"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.prefix">[docs]</a> <span class="k">def</span> <span class="nf">prefix</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">namespace</span><span class="p">):</span>
<span class="sd">""" """</span>
<span class="k">return</span> <span class="nb">dict</span><span class="p">(</span>
<span class="p">[(</span><span class="n">v</span><span class="p">,</span> <span class="n">k</span><span class="p">)</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">nsBindings</span><span class="o">.</span><span class="n">items</span><span class="p">()]</span>
<span class="p">)</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">namespace</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLStore.namespace"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.namespace">[docs]</a> <span class="k">def</span> <span class="nf">namespace</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">prefix</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">nsBindings</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">prefix</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLStore.namespaces"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLStore.namespaces">[docs]</a> <span class="k">def</span> <span class="nf">namespaces</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">for</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">ns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">nsBindings</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="k">yield</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">ns</span>
</div></div>
<div class="viewcode-block" id="SPARQLUpdateStore"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLUpdateStore">[docs]</a><span class="k">class</span> <span class="nc">SPARQLUpdateStore</span><span class="p">(</span><span class="n">SPARQLStore</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> A store using SPARQL queries for read-access</span>
<span class="sd"> and SPARQL Update for changes</span>
<span class="sd"> This can be context-aware, if so, any changes will</span>
<span class="sd"> be to the given named graph only.</span>
<span class="sd"> For Graph objects, everything works as expected.</span>
<span class="sd"> .. warning:: The SPARQL Update Store does not support blank-nodes!</span>
<span class="sd"> As blank-nodes acts as variables in SPARQL queries</span>
<span class="sd"> there is no way to query for a particular blank node.</span>
<span class="sd"> See http://www.w3.org/TR/sparql11-query/#BGPsparqlBNodes</span>
<span class="sd"> """</span>
<span class="n">where_pattern</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="s">r"""(?P<where>WHERE\s*{)"""</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">IGNORECASE</span><span class="p">)</span>
<div class="viewcode-block" id="SPARQLUpdateStore.__init__"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLUpdateStore.__init__">[docs]</a> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span>
<span class="n">queryEndpoint</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">update_endpoint</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span>
<span class="n">bNodeAsURI</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span> <span class="n">sparql11</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span>
<span class="n">context_aware</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span>
<span class="n">postAsEncoded</span><span class="o">=</span><span class="bp">True</span><span class="p">):</span>
<span class="n">SPARQLStore</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span>
<span class="n">queryEndpoint</span><span class="p">,</span> <span class="n">bNodeAsURI</span><span class="p">,</span> <span class="n">sparql11</span><span class="p">,</span> <span class="n">context_aware</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">connection</span> <span class="o">=</span> <span class="bp">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update_endpoint</span> <span class="o">=</span> <span class="n">update_endpoint</span>
<span class="bp">self</span><span class="o">.</span><span class="n">postAsEncoded</span> <span class="o">=</span> <span class="n">postAsEncoded</span>
<span class="bp">self</span><span class="o">.</span><span class="n">headers</span> <span class="o">=</span> <span class="p">{</span><span class="s">'Content-type'</span><span class="p">:</span> <span class="n">SPARQL_POST_ENCODED</span><span class="p">,</span>
<span class="s">'Connection'</span><span class="p">:</span> <span class="s">'Keep-alive'</span><span class="p">}</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">postAsEncoded</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">headers</span><span class="p">[</span><span class="s">'Content-type'</span><span class="p">]</span> <span class="o">=</span> <span class="n">SPARQL_POST_UPDATE</span>
</div>
<span class="k">def</span> <span class="nf">__set_update_endpoint</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">update_endpoint</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__update_endpoint</span> <span class="o">=</span> <span class="n">update_endpoint</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">__update_endpoint</span><span class="p">:</span>
<span class="n">p</span> <span class="o">=</span> <span class="n">urlparse</span><span class="o">.</span><span class="n">urlparse</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">update_endpoint</span><span class="p">)</span>
<span class="k">assert</span> <span class="ow">not</span> <span class="n">p</span><span class="o">.</span><span class="n">username</span><span class="p">,</span> \
<span class="s">"SPARQL Update store does not support HTTP authentication"</span>
<span class="k">assert</span> <span class="ow">not</span> <span class="n">p</span><span class="o">.</span><span class="n">password</span><span class="p">,</span> \
<span class="s">"SPARQL Update store does not support HTTP authentication"</span>
<span class="k">assert</span> <span class="n">p</span><span class="o">.</span><span class="n">scheme</span> <span class="o">==</span> <span class="s">"http"</span><span class="p">,</span> <span class="s">"SPARQL Update is an http protocol!"</span>
<span class="bp">self</span><span class="o">.</span><span class="n">host</span> <span class="o">=</span> <span class="n">p</span><span class="o">.</span><span class="n">hostname</span>
<span class="bp">self</span><span class="o">.</span><span class="n">port</span> <span class="o">=</span> <span class="n">p</span><span class="o">.</span><span class="n">port</span>
<span class="bp">self</span><span class="o">.</span><span class="n">path</span> <span class="o">=</span> <span class="n">p</span><span class="o">.</span><span class="n">path</span>
<span class="bp">self</span><span class="o">.</span><span class="n">connection</span> <span class="o">=</span> <span class="n">httplib</span><span class="o">.</span><span class="n">HTTPConnection</span><span class="p">(</span>
<span class="bp">self</span><span class="o">.</span><span class="n">host</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">port</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">host</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">port</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">path</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">connection</span> <span class="o">=</span> <span class="bp">None</span>
<span class="k">def</span> <span class="nf">__get_update_endpoint</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">__update_endpoint</span>
<span class="n">update_endpoint</span> <span class="o">=</span> <span class="nb">property</span><span class="p">(</span>
<span class="n">__get_update_endpoint</span><span class="p">,</span>
<span class="n">__set_update_endpoint</span><span class="p">,</span>
<span class="n">doc</span><span class="o">=</span><span class="s">'the HTTP URL for the Update endpoint, typically'</span> <span class="o">+</span>
<span class="s">'something like http://server/dataset/update'</span><span class="p">)</span>
<div class="viewcode-block" id="SPARQLUpdateStore.open"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLUpdateStore.open">[docs]</a> <span class="k">def</span> <span class="nf">open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">configuration</span><span class="p">,</span> <span class="n">create</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> sets the endpoint URLs for this SPARQLStore</span>
<span class="sd"> :param configuration: either a tuple of (queryEndpoint, update_endpoint),</span>
<span class="sd"> or a string with the query endpoint</span>
<span class="sd"> :param create: if True an exception is thrown.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">create</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"Cannot create a SPARQL Endpoint"</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">configuration</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">query_endpoint</span> <span class="o">=</span> <span class="n">configuration</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">configuration</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update_endpoint</span> <span class="o">=</span> <span class="n">configuration</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">endpoint</span> <span class="o">=</span> <span class="n">configuration</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">update_endpoint</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update_endpoint</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">endpoint</span>
<span class="c"># Transactional interfaces</span></div>
<div class="viewcode-block" id="SPARQLUpdateStore.commit"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLUpdateStore.commit">[docs]</a> <span class="k">def</span> <span class="nf">commit</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">""" """</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s">'The SPARQL Update store is not transaction aware!'</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLUpdateStore.rollback"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLUpdateStore.rollback">[docs]</a> <span class="k">def</span> <span class="nf">rollback</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">""" """</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s">'The SPARQL Update store is not transaction aware'</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="SPARQLUpdateStore.add"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLUpdateStore.add">[docs]</a> <span class="k">def</span> <span class="nf">add</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">spo</span><span class="p">,</span> <span class="n">context</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
<span class="sd">""" Add a triple to the store of triples. """</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">connection</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"UpdateEndpoint is not set - call 'open'"</span><span class="p">)</span>
<span class="k">assert</span> <span class="ow">not</span> <span class="n">quoted</span>
<span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">obj</span><span class="p">)</span> <span class="o">=</span> <span class="n">spo</span>
<span class="k">if</span> <span class="p">(</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">BNode</span><span class="p">)</span> <span class="ow">or</span>
<span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">BNode</span><span class="p">)</span> <span class="ow">or</span>
<span class="nb">isinstance</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="n">BNode</span><span class="p">)</span> <span class="p">):</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"SPARQLStore does not support Bnodes! "</span>
<span class="s">"See http://www.w3.org/TR/sparql11-query/#BGPsparqlBNodes"</span><span class="p">)</span>
<span class="n">triple</span> <span class="o">=</span> <span class="s">"</span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> ."</span> <span class="o">%</span> <span class="p">(</span><span class="n">subject</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span> <span class="n">predicate</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span> <span class="n">obj</span><span class="o">.</span><span class="n">n3</span><span class="p">())</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">context_aware</span> <span class="ow">and</span> <span class="n">context</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
<span class="n">q</span> <span class="o">=</span> <span class="s">"INSERT DATA { GRAPH </span><span class="si">%s</span><span class="s"> { </span><span class="si">%s</span><span class="s"> } }"</span> <span class="o">%</span> <span class="p">(</span>
<span class="n">context</span><span class="o">.</span><span class="n">identifier</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span> <span class="n">triple</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">q</span> <span class="o">=</span> <span class="s">"INSERT DATA { </span><span class="si">%s</span><span class="s"> }"</span> <span class="o">%</span> <span class="n">triple</span>
<span class="n">r</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_do_update</span><span class="p">(</span><span class="n">q</span><span class="p">)</span>
<span class="n">content</span> <span class="o">=</span> <span class="n">r</span><span class="o">.</span><span class="n">read</span><span class="p">()</span> <span class="c"># we expect no content</span>
<span class="k">if</span> <span class="n">r</span><span class="o">.</span><span class="n">status</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">(</span><span class="mi">200</span><span class="p">,</span> <span class="mi">204</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"Could not update: </span><span class="si">%d</span><span class="s"> </span><span class="si">%s</span><span class="se">\n</span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span>
<span class="n">r</span><span class="o">.</span><span class="n">status</span><span class="p">,</span> <span class="n">r</span><span class="o">.</span><span class="n">reason</span><span class="p">,</span> <span class="n">content</span><span class="p">))</span>
</div>
<div class="viewcode-block" id="SPARQLUpdateStore.addN"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLUpdateStore.addN">[docs]</a> <span class="k">def</span> <span class="nf">addN</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">quads</span><span class="p">):</span>
<span class="sd">""" Add a list of quads to the store. """</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">connection</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"UpdateEndpoint is not set - call 'open'"</span><span class="p">)</span>
<span class="n">data</span> <span class="o">=</span> <span class="s">""</span>
<span class="k">for</span> <span class="n">spoc</span> <span class="ow">in</span> <span class="n">quads</span><span class="p">:</span>
<span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="n">context</span><span class="p">)</span> <span class="o">=</span> <span class="n">spoc</span>
<span class="k">if</span> <span class="p">(</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">BNode</span><span class="p">)</span> <span class="ow">or</span>
<span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">BNode</span><span class="p">)</span> <span class="ow">or</span>
<span class="nb">isinstance</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="n">BNode</span><span class="p">)</span> <span class="p">):</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"SPARQLStore does not support Bnodes! "</span>
<span class="s">"See http://www.w3.org/TR/sparql11-query/#BGPsparqlBNodes"</span><span class="p">)</span>
<span class="n">triple</span> <span class="o">=</span> <span class="s">"</span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> ."</span> <span class="o">%</span> <span class="p">(</span><span class="n">subject</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span> <span class="n">predicate</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span> <span class="n">obj</span><span class="o">.</span><span class="n">n3</span><span class="p">())</span>
<span class="n">data</span> <span class="o">+=</span> <span class="s">"INSERT DATA { GRAPH <</span><span class="si">%s</span><span class="s">> { </span><span class="si">%s</span><span class="s"> } }</span><span class="se">\n</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span>
<span class="n">context</span><span class="o">.</span><span class="n">identifier</span><span class="p">,</span> <span class="n">triple</span><span class="p">)</span>
<span class="n">r</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_do_update</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="n">content</span> <span class="o">=</span> <span class="n">r</span><span class="o">.</span><span class="n">read</span><span class="p">()</span> <span class="c"># we expect no content</span>
<span class="k">if</span> <span class="n">r</span><span class="o">.</span><span class="n">status</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">(</span><span class="mi">200</span><span class="p">,</span> <span class="mi">204</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"Could not update: </span><span class="si">%d</span><span class="s"> </span><span class="si">%s</span><span class="se">\n</span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span>
<span class="n">r</span><span class="o">.</span><span class="n">status</span><span class="p">,</span> <span class="n">r</span><span class="o">.</span><span class="n">reason</span><span class="p">,</span> <span class="n">content</span><span class="p">))</span>
</div>
<div class="viewcode-block" id="SPARQLUpdateStore.remove"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLUpdateStore.remove">[docs]</a> <span class="k">def</span> <span class="nf">remove</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">spo</span><span class="p">,</span> <span class="n">context</span><span class="p">):</span>
<span class="sd">""" Remove a triple from the store """</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">connection</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"UpdateEndpoint is not set - call 'open'"</span><span class="p">)</span>
<span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">obj</span><span class="p">)</span> <span class="o">=</span> <span class="n">spo</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">subject</span><span class="p">:</span>
<span class="n">subject</span> <span class="o">=</span> <span class="n">Variable</span><span class="p">(</span><span class="s">"S"</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">predicate</span><span class="p">:</span>
<span class="n">predicate</span> <span class="o">=</span> <span class="n">Variable</span><span class="p">(</span><span class="s">"P"</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">obj</span><span class="p">:</span>
<span class="n">obj</span> <span class="o">=</span> <span class="n">Variable</span><span class="p">(</span><span class="s">"O"</span><span class="p">)</span>
<span class="n">triple</span> <span class="o">=</span> <span class="s">"</span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> </span><span class="si">%s</span><span class="s"> ."</span> <span class="o">%</span> <span class="p">(</span><span class="n">subject</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span> <span class="n">predicate</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span> <span class="n">obj</span><span class="o">.</span><span class="n">n3</span><span class="p">())</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">context_aware</span> <span class="ow">and</span> <span class="n">context</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
<span class="n">q</span> <span class="o">=</span> <span class="s">"DELETE { GRAPH </span><span class="si">%s</span><span class="s"> { </span><span class="si">%s</span><span class="s"> } } WHERE { GRAPH </span><span class="si">%s</span><span class="s"> { </span><span class="si">%s</span><span class="s"> } }"</span> <span class="o">%</span> <span class="p">(</span>
<span class="n">context</span><span class="o">.</span><span class="n">identifier</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span> <span class="n">triple</span><span class="p">,</span>
<span class="n">context</span><span class="o">.</span><span class="n">identifier</span><span class="o">.</span><span class="n">n3</span><span class="p">(),</span> <span class="n">triple</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">q</span> <span class="o">=</span> <span class="s">"DELETE { </span><span class="si">%s</span><span class="s"> } WHERE { </span><span class="si">%s</span><span class="s"> } "</span> <span class="o">%</span> <span class="p">(</span><span class="n">triple</span><span class="p">,</span> <span class="n">triple</span><span class="p">)</span>
<span class="n">r</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_do_update</span><span class="p">(</span><span class="n">q</span><span class="p">)</span>
<span class="n">content</span> <span class="o">=</span> <span class="n">r</span><span class="o">.</span><span class="n">read</span><span class="p">()</span> <span class="c"># we expect no content</span>
<span class="k">if</span> <span class="n">r</span><span class="o">.</span><span class="n">status</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">(</span><span class="mi">200</span><span class="p">,</span> <span class="mi">204</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"Could not update: </span><span class="si">%d</span><span class="s"> </span><span class="si">%s</span><span class="se">\n</span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span>
<span class="n">r</span><span class="o">.</span><span class="n">status</span><span class="p">,</span> <span class="n">r</span><span class="o">.</span><span class="n">reason</span><span class="p">,</span> <span class="n">content</span><span class="p">))</span>
</div>
<span class="k">def</span> <span class="nf">_do_update</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">update</span><span class="p">):</span>
<span class="kn">import</span> <span class="nn">urllib</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">postAsEncoded</span><span class="p">:</span>
<span class="n">update</span> <span class="o">=</span> <span class="n">urllib</span><span class="o">.</span><span class="n">urlencode</span><span class="p">({</span><span class="s">'update'</span><span class="p">:</span> <span class="n">update</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s">"utf-8"</span><span class="p">)})</span>
<span class="bp">self</span><span class="o">.</span><span class="n">connection</span><span class="o">.</span><span class="n">request</span><span class="p">(</span>
<span class="s">'POST'</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">path</span><span class="p">,</span> <span class="n">update</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s">"utf-8"</span><span class="p">),</span> <span class="bp">self</span><span class="o">.</span><span class="n">headers</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">connection</span><span class="o">.</span><span class="n">getresponse</span><span class="p">()</span>
<div class="viewcode-block" id="SPARQLUpdateStore.update"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.sparqlstore.SPARQLUpdateStore.update">[docs]</a> <span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">,</span>
<span class="n">initNs</span><span class="o">=</span><span class="p">{},</span>
<span class="n">initBindings</span><span class="o">=</span><span class="p">{},</span>
<span class="n">queryGraph</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span>
<span class="n">DEBUG</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Perform a SPARQL Update Query against the endpoint,</span>
<span class="sd"> INSERT, LOAD, DELETE etc.</span>
<span class="sd"> Setting initNs adds PREFIX declarations to the beginning of</span>
<span class="sd"> the update. Setting initBindings adds inline VALUEs to the</span>
<span class="sd"> beginning of every WHERE clause. By the SPARQL grammar, all</span>
<span class="sd"> operations that support variables (namely INSERT and DELETE)</span>
<span class="sd"> require a WHERE clause.</span>
<span class="sd"> Important: initBindings fails if the update contains the</span>
<span class="sd"> substring 'WHERE {' which does not denote a WHERE clause, e.g.</span>
<span class="sd"> if it is part of a literal.</span>
<span class="sd"> """</span>
<span class="bp">self</span><span class="o">.</span><span class="n">debug</span> <span class="o">=</span> <span class="n">DEBUG</span>
<span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="nb">basestring</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setNamespaceBindings</span><span class="p">(</span><span class="n">initNs</span><span class="p">)</span>
<span class="n">query</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">injectPrefixes</span><span class="p">(</span><span class="n">query</span><span class="p">)</span>
<span class="k">if</span> <span class="n">initBindings</span><span class="p">:</span>
<span class="c"># For INSERT and DELETE the WHERE clause is obligatory</span>
<span class="c"># (http://www.w3.org/TR/2013/REC-sparql11-query-20130321/#rModify)</span>
<span class="c"># Other query types do not allow variables and don't</span>
<span class="c"># have a WHERE clause. This also works for updates with</span>
<span class="c"># more than one INSERT/DELETE.</span>
<span class="n">v</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">initBindings</span><span class="p">)</span>
<span class="n">values</span> <span class="o">=</span> <span class="s">"</span><span class="se">\n</span><span class="s">VALUES ( </span><span class="si">%s</span><span class="s"> )</span><span class="se">\n</span><span class="s">{ ( </span><span class="si">%s</span><span class="s"> ) }</span><span class="se">\n</span><span class="s">"</span>\
<span class="o">%</span> <span class="p">(</span><span class="s">" "</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="s">"?"</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">x</span><span class="p">)</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">v</span><span class="p">),</span>
<span class="s">" "</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">initBindings</span><span class="p">[</span><span class="n">x</span><span class="p">]</span><span class="o">.</span><span class="n">n3</span><span class="p">()</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">v</span><span class="p">))</span>
<span class="n">query</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">where_pattern</span><span class="o">.</span><span class="n">sub</span><span class="p">(</span><span class="s">"WHERE { "</span> <span class="o">+</span> <span class="n">values</span><span class="p">,</span> <span class="n">query</span><span class="p">)</span>
<span class="n">r</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_do_update</span><span class="p">(</span><span class="n">query</span><span class="p">)</span>
<span class="n">content</span> <span class="o">=</span> <span class="n">r</span><span class="o">.</span><span class="n">read</span><span class="p">()</span> <span class="c"># we expect no content</span>
<span class="k">if</span> <span class="n">r</span><span class="o">.</span><span class="n">status</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">(</span><span class="mi">200</span><span class="p">,</span> <span class="mi">204</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"Could not update: </span><span class="si">%d</span><span class="s"> </span><span class="si">%s</span><span class="se">\n</span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span>
<span class="n">r</span><span class="o">.</span><span class="n">status</span><span class="p">,</span> <span class="n">r</span><span class="o">.</span><span class="n">reason</span><span class="p">,</span> <span class="n">content</span><span class="p">))</span></div></div>
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