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<h1>Source code for rdflib.plugins.parsers.pyRdfa.state</h1><div class="highlight"><pre>
<span class="c"># -*- coding: utf-8 -*-</span>
<span class="sd">"""</span>
<span class="sd">Parser's execution context (a.k.a. state) object and handling. The state includes:</span>
<span class="sd"> - language, retrieved from C{@xml:lang} or C{@lang}</span>
<span class="sd"> - URI base, determined by C{<base>} or set explicitly. This is a little bit superfluous, because the current RDFa syntax does not make use of C{@xml:base}; i.e., this could be a global value. But the structure is prepared to add C{@xml:base} easily, if needed.</span>
<span class="sd"> - options, in the form of an L{options<pyRdfa.options>} instance</span>
<span class="sd"> - a separate vocabulary/CURIE handling resource, in the form of an L{termorcurie<pyRdfa.TermOrCurie>} instance</span>
<span class="sd">The execution context object is also used to handle URI-s, CURIE-s, terms, etc.</span>
<span class="sd">@summary: RDFa parser execution context</span>
<span class="sd">@organization: U{World Wide Web Consortium<http://www.w3.org>}</span>
<span class="sd">@author: U{Ivan Herman<a href="http://www.w3.org/People/Ivan/">}</span>
<span class="sd">@license: This software is available for use under the</span>
<span class="sd">U{W3C® SOFTWARE NOTICE AND LICENSE<href="http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231">}</span>
<span class="sd">"""</span>
<span class="sd">"""</span>
<span class="sd">$Id: state.py,v 1.23 2013-10-16 11:48:54 ivan Exp $</span>
<span class="sd">$Date: 2013-10-16 11:48:54 $</span>
<span class="sd">"""</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="p">(</span><span class="n">py_v_major</span><span class="p">,</span> <span class="n">py_v_minor</span><span class="p">,</span> <span class="n">py_v_micro</span><span class="p">,</span> <span class="n">py_v_final</span><span class="p">,</span> <span class="n">py_v_serial</span><span class="p">)</span> <span class="o">=</span> <span class="n">sys</span><span class="o">.</span><span class="n">version_info</span>
<span class="kn">import</span> <span class="nn">rdflib</span>
<span class="kn">from</span> <span class="nn">rdflib</span> <span class="kn">import</span> <span class="n">URIRef</span>
<span class="kn">from</span> <span class="nn">rdflib</span> <span class="kn">import</span> <span class="n">Literal</span>
<span class="kn">from</span> <span class="nn">rdflib</span> <span class="kn">import</span> <span class="n">BNode</span>
<span class="kn">from</span> <span class="nn">rdflib</span> <span class="kn">import</span> <span class="n">Namespace</span>
<span class="k">if</span> <span class="n">rdflib</span><span class="o">.</span><span class="n">__version__</span> <span class="o">>=</span> <span class="s">"3.0.0"</span> <span class="p">:</span>
<span class="kn">from</span> <span class="nn">rdflib</span> <span class="kn">import</span> <span class="n">RDF</span> <span class="k">as</span> <span class="n">ns_rdf</span>
<span class="kn">from</span> <span class="nn">rdflib</span> <span class="kn">import</span> <span class="n">RDFS</span> <span class="k">as</span> <span class="n">ns_rdfs</span>
<span class="k">else</span> <span class="p">:</span>
<span class="kn">from</span> <span class="nn">rdflib.RDFS</span> <span class="kn">import</span> <span class="n">RDFSNS</span> <span class="k">as</span> <span class="n">ns_rdfs</span>
<span class="kn">from</span> <span class="nn">rdflib.RDF</span> <span class="kn">import</span> <span class="n">RDFNS</span> <span class="k">as</span> <span class="n">ns_rdf</span>
<span class="kn">from</span> <span class="nn">.options</span> <span class="kn">import</span> <span class="n">Options</span>
<span class="kn">from</span> <span class="nn">.utils</span> <span class="kn">import</span> <span class="n">quote_URI</span>
<span class="kn">from</span> <span class="nn">.host</span> <span class="kn">import</span> <span class="n">HostLanguage</span><span class="p">,</span> <span class="n">accept_xml_base</span><span class="p">,</span> <span class="n">accept_xml_lang</span><span class="p">,</span> <span class="n">beautifying_prefixes</span>
<span class="kn">from</span> <span class="nn">.termorcurie</span> <span class="kn">import</span> <span class="n">TermOrCurie</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">UnresolvablePrefix</span><span class="p">,</span> <span class="n">UnresolvableTerm</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">err_lang</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">err_URI_scheme</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">err_illegal_safe_CURIE</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">err_no_CURIE_in_safe_CURIE</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">err_undefined_terms</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">err_non_legal_CURIE_ref</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">err_undefined_CURIE</span>
<span class="k">if</span> <span class="n">py_v_major</span> <span class="o">>=</span> <span class="mi">3</span> <span class="p">:</span>
<span class="kn">from</span> <span class="nn">urllib.parse</span> <span class="kn">import</span> <span class="n">urlparse</span><span class="p">,</span> <span class="n">urlunparse</span><span class="p">,</span> <span class="n">urlsplit</span><span class="p">,</span> <span class="n">urljoin</span>
<span class="k">else</span> <span class="p">:</span>
<span class="kn">from</span> <span class="nn">urlparse</span> <span class="kn">import</span> <span class="n">urlparse</span><span class="p">,</span> <span class="n">urlunparse</span><span class="p">,</span> <span class="n">urlsplit</span><span class="p">,</span> <span class="n">urljoin</span>
<div class="viewcode-block" id="ListStructure"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ListStructure">[docs]</a><span class="k">class</span> <span class="nc">ListStructure</span> <span class="p">:</span>
<span class="sd">"""Special class to handle the C{@inlist} type structures in RDFa 1.1; stores the "origin", i.e,</span>
<span class="sd"> where the list will be attached to, and the mappings as defined in the spec.</span>
<span class="sd"> """</span>
<div class="viewcode-block" id="ListStructure.__init__"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ListStructure.__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="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mapping</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">origin</span> <span class="o">=</span> <span class="bp">None</span>
<span class="c">#### Core Class definition</span></div></div>
<div class="viewcode-block" id="ExecutionContext"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ExecutionContext">[docs]</a><span class="k">class</span> <span class="nc">ExecutionContext</span> <span class="p">:</span>
<span class="sd">"""State at a specific node, including the current set of namespaces in the RDFLib sense, current language,</span>
<span class="sd"> the base, vocabularies, etc. The class is also used to interpret URI-s and CURIE-s to produce</span>
<span class="sd"> URI references for RDFLib.</span>
<span class="sd"> </span>
<span class="sd"> @ivar options: reference to the overall options</span>
<span class="sd"> @type options: L{Options}</span>
<span class="sd"> @ivar base: the 'base' URI</span>
<span class="sd"> @ivar parsedBase: the parsed version of base, as produced by urlparse.urlsplit</span>
<span class="sd"> @ivar defaultNS: default namespace (if defined via @xmlns) to be used for XML Literals</span>
<span class="sd"> @ivar lang: language tag (possibly None)</span>
<span class="sd"> @ivar term_or_curie: vocabulary management class instance</span>
<span class="sd"> @type term_or_curie: L{termorcurie.TermOrCurie}</span>
<span class="sd"> @ivar list_mapping: dictionary of arrays, containing a list of URIs key-ed via properties for lists</span>
<span class="sd"> @ivar node: the node to which this state belongs</span>
<span class="sd"> @type node: DOM node instance</span>
<span class="sd"> @ivar rdfa_version: RDFa version of the content</span>
<span class="sd"> @type rdfa_version: String</span>
<span class="sd"> @ivar supress_lang: in some cases, the effect of the lang attribute should be supressed for the given node, although it should be inherited down below (example: @value attribute of the data element in HTML5)</span>
<span class="sd"> @type supress_lang: Boolean</span>
<span class="sd"> @cvar _list: list of attributes that allow for lists of values and should be treated as such</span>
<span class="sd"> @cvar _resource_type: dictionary; mapping table from attribute name to the exact method to retrieve the URI(s). Is initialized at first instantiation.</span>
<span class="sd"> """</span>
<span class="c"># list of attributes that allow for lists of values and should be treated as such </span>
<span class="n">_list</span> <span class="o">=</span> <span class="p">[</span> <span class="s">"rel"</span><span class="p">,</span> <span class="s">"rev"</span><span class="p">,</span> <span class="s">"property"</span><span class="p">,</span> <span class="s">"typeof"</span><span class="p">,</span> <span class="s">"role"</span> <span class="p">]</span>
<span class="c"># mapping table from attribute name to the exact method to retrieve the URI(s).</span>
<span class="n">_resource_type</span> <span class="o">=</span> <span class="p">{}</span>
<div class="viewcode-block" id="ExecutionContext.__init__"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ExecutionContext.__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">node</span><span class="p">,</span> <span class="n">graph</span><span class="p">,</span> <span class="n">inherited_state</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="s">""</span><span class="p">,</span> <span class="n">options</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">rdfa_version</span> <span class="o">=</span> <span class="bp">None</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> @param node: the current DOM Node</span>
<span class="sd"> @param graph: the RDFLib Graph</span>
<span class="sd"> @keyword inherited_state: the state as inherited</span>
<span class="sd"> from upper layers. This inherited_state is mixed with the state information</span>
<span class="sd"> retrieved from the current node.</span>
<span class="sd"> @type inherited_state: L{state.ExecutionContext}</span>
<span class="sd"> @keyword base: string denoting the base URI for the specific node. This overrides the possible</span>
<span class="sd"> base inherited from the upper layers. The </span>
<span class="sd"> current XHTML+RDFa syntax does not allow the usage of C{@xml:base}, but SVG1.2 does, so this is</span>
<span class="sd"> necessary for SVG (and other possible XML dialects that accept C{@xml:base})</span>
<span class="sd"> @keyword options: invocation options, and references to warning graphs</span>
<span class="sd"> @type options: L{Options<pyRdfa.options>}</span>
<span class="sd"> """</span>
<span class="k">def</span> <span class="nf">remove_frag_id</span><span class="p">(</span><span class="n">uri</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> The fragment ID for self.base must be removed</span>
<span class="sd"> """</span>
<span class="k">try</span> <span class="p">:</span>
<span class="c"># To be on the safe side:-)</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">urlparse</span><span class="p">(</span><span class="n">uri</span><span class="p">)</span>
<span class="k">return</span> <span class="n">urlunparse</span><span class="p">((</span><span class="n">t</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span><span class="n">t</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span><span class="n">t</span><span class="p">[</span><span class="mi">2</span><span class="p">],</span><span class="n">t</span><span class="p">[</span><span class="mi">3</span><span class="p">],</span><span class="n">t</span><span class="p">[</span><span class="mi">4</span><span class="p">],</span><span class="s">""</span><span class="p">))</span>
<span class="k">except</span> <span class="p">:</span>
<span class="k">return</span> <span class="n">uri</span>
<span class="c"># This is, conceptually, an additional class initialization, but it must be done run time, otherwise import errors show up</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_resource_type</span> <span class="p">)</span> <span class="o">==</span> <span class="mi">0</span> <span class="p">:</span>
<span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_resource_type</span> <span class="o">=</span> <span class="p">{</span>
<span class="s">"href"</span> <span class="p">:</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_URI</span><span class="p">,</span>
<span class="s">"src"</span> <span class="p">:</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_URI</span><span class="p">,</span>
<span class="s">"vocab"</span> <span class="p">:</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_URI</span><span class="p">,</span>
<span class="s">"about"</span> <span class="p">:</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_CURIEorURI</span><span class="p">,</span>
<span class="s">"resource"</span> <span class="p">:</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_CURIEorURI</span><span class="p">,</span>
<span class="s">"rel"</span> <span class="p">:</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_TERMorCURIEorAbsURI</span><span class="p">,</span>
<span class="s">"rev"</span> <span class="p">:</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_TERMorCURIEorAbsURI</span><span class="p">,</span>
<span class="s">"datatype"</span> <span class="p">:</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_TERMorCURIEorAbsURI</span><span class="p">,</span>
<span class="s">"typeof"</span> <span class="p">:</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_TERMorCURIEorAbsURI</span><span class="p">,</span>
<span class="s">"property"</span> <span class="p">:</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_TERMorCURIEorAbsURI</span><span class="p">,</span>
<span class="s">"role"</span> <span class="p">:</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_TERMorCURIEorAbsURI</span><span class="p">,</span>
<span class="p">}</span>
<span class="c">#-----------------------------------------------------------------</span>
<span class="bp">self</span><span class="o">.</span><span class="n">node</span> <span class="o">=</span> <span class="n">node</span>
<span class="c">#-----------------------------------------------------------------</span>
<span class="c"># Settling the base. In a generic XML, xml:base should be accepted at all levels (though this is not the</span>
<span class="c"># case in, say, XHTML...)</span>
<span class="c"># At the moment, it is invoked with a 'None' at the top level of parsing, that is</span>
<span class="c"># when the <base> element is looked for (for the HTML cases, that is)</span>
<span class="k">if</span> <span class="n">inherited_state</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rdfa_version</span> <span class="o">=</span> <span class="n">inherited_state</span><span class="o">.</span><span class="n">rdfa_version</span>
<span class="bp">self</span><span class="o">.</span><span class="n">base</span> <span class="o">=</span> <span class="n">inherited_state</span><span class="o">.</span><span class="n">base</span>
<span class="bp">self</span><span class="o">.</span><span class="n">options</span> <span class="o">=</span> <span class="n">inherited_state</span><span class="o">.</span><span class="n">options</span>
<span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span> <span class="o">=</span> <span class="n">inherited_state</span><span class="o">.</span><span class="n">list_mapping</span>
<span class="bp">self</span><span class="o">.</span><span class="n">new_list</span> <span class="o">=</span> <span class="bp">False</span>
<span class="c"># for generic XML versions the xml:base attribute should be handled</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">host_language</span> <span class="ow">in</span> <span class="n">accept_xml_base</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">hasAttribute</span><span class="p">(</span><span class="s">"xml:base"</span><span class="p">)</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">base</span> <span class="o">=</span> <span class="n">remove_frag_id</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">getAttribute</span><span class="p">(</span><span class="s">"xml:base"</span><span class="p">))</span>
<span class="k">else</span> <span class="p">:</span>
<span class="c"># this is the branch called from the very top </span>
<span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span> <span class="o">=</span> <span class="n">ListStructure</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">new_list</span> <span class="o">=</span> <span class="bp">True</span>
<span class="k">if</span> <span class="n">rdfa_version</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">rdfa_version</span> <span class="o">=</span> <span class="n">rdfa_version</span>
<span class="k">else</span> <span class="p">:</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">rdfa_current_version</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rdfa_version</span> <span class="o">=</span> <span class="n">rdfa_current_version</span>
<span class="c"># This value can be overwritten by a @version attribute</span>
<span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">hasAttribute</span><span class="p">(</span><span class="s">"version"</span><span class="p">)</span> <span class="p">:</span>
<span class="n">top_version</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">getAttribute</span><span class="p">(</span><span class="s">"version"</span><span class="p">)</span>
<span class="k">if</span> <span class="n">top_version</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="s">"RDFa 1.0"</span><span class="p">)</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span> <span class="ow">or</span> <span class="n">top_version</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="s">"RDFa1.0"</span><span class="p">)</span> <span class="o">!=</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">rdfa_version</span> <span class="o">=</span> <span class="s">"1.0"</span>
<span class="k">elif</span> <span class="n">top_version</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="s">"RDFa 1.1"</span><span class="p">)</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span> <span class="ow">or</span> <span class="n">top_version</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="s">"RDFa1.1"</span><span class="p">)</span> <span class="o">!=</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">rdfa_version</span> <span class="o">=</span> <span class="s">"1.1"</span>
<span class="c"># this is just to play safe. I believe this should actually not happen...</span>
<span class="k">if</span> <span class="n">options</span> <span class="o">==</span> <span class="bp">None</span> <span class="p">:</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">Options</span>
<span class="bp">self</span><span class="o">.</span><span class="n">options</span> <span class="o">=</span> <span class="n">Options</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">options</span> <span class="o">=</span> <span class="n">options</span>
<span class="bp">self</span><span class="o">.</span><span class="n">base</span> <span class="o">=</span> <span class="s">""</span>
<span class="c"># handle the base element case for HTML</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">host_language</span> <span class="ow">in</span> <span class="p">[</span> <span class="n">HostLanguage</span><span class="o">.</span><span class="n">xhtml</span><span class="p">,</span> <span class="n">HostLanguage</span><span class="o">.</span><span class="n">html5</span><span class="p">,</span> <span class="n">HostLanguage</span><span class="o">.</span><span class="n">xhtml5</span> <span class="p">]</span> <span class="p">:</span>
<span class="k">for</span> <span class="n">bases</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">getElementsByTagName</span><span class="p">(</span><span class="s">"base"</span><span class="p">)</span> <span class="p">:</span>
<span class="k">if</span> <span class="n">bases</span><span class="o">.</span><span class="n">hasAttribute</span><span class="p">(</span><span class="s">"href"</span><span class="p">)</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">base</span> <span class="o">=</span> <span class="n">remove_frag_id</span><span class="p">(</span><span class="n">bases</span><span class="o">.</span><span class="n">getAttribute</span><span class="p">(</span><span class="s">"href"</span><span class="p">))</span>
<span class="k">continue</span>
<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">host_language</span> <span class="ow">in</span> <span class="n">accept_xml_base</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">hasAttribute</span><span class="p">(</span><span class="s">"xml:base"</span><span class="p">)</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">base</span> <span class="o">=</span> <span class="n">remove_frag_id</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">getAttribute</span><span class="p">(</span><span class="s">"xml:base"</span><span class="p">))</span>
<span class="c"># If no local setting for base occurs, the input argument has it</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">base</span> <span class="o">==</span> <span class="s">""</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">base</span> <span class="o">=</span> <span class="n">base</span>
<span class="c"># Perform an extra beautification in RDFLib</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">host_language</span> <span class="ow">in</span> <span class="n">beautifying_prefixes</span> <span class="p">:</span>
<span class="nb">dict</span> <span class="o">=</span> <span class="n">beautifying_prefixes</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">host_language</span><span class="p">]</span>
<span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="nb">dict</span> <span class="p">:</span>
<span class="n">graph</span><span class="o">.</span><span class="n">bind</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="nb">dict</span><span class="p">[</span><span class="n">key</span><span class="p">])</span>
<span class="n">input_info</span> <span class="o">=</span> <span class="s">"Input Host Language:</span><span class="si">%s</span><span class="s">, RDFa version:</span><span class="si">%s</span><span class="s">, base:</span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">host_language</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">rdfa_version</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">base</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">add_info</span><span class="p">(</span><span class="n">input_info</span><span class="p">)</span>
<span class="c">#-----------------------------------------------------------------</span>
<span class="c"># this will be used repeatedly, better store it once and for all... </span>
<span class="bp">self</span><span class="o">.</span><span class="n">parsedBase</span> <span class="o">=</span> <span class="n">urlsplit</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">base</span><span class="p">)</span>
<span class="c">#-----------------------------------------------------------------</span>
<span class="c"># generate and store the local CURIE handling class instance</span>
<span class="bp">self</span><span class="o">.</span><span class="n">term_or_curie</span> <span class="o">=</span> <span class="n">TermOrCurie</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">graph</span><span class="p">,</span> <span class="n">inherited_state</span><span class="p">)</span>
<span class="c">#-----------------------------------------------------------------</span>
<span class="c"># Settling the language tags</span>
<span class="c"># @lang has priority over @xml:lang</span>
<span class="c"># it is a bit messy: the three fundamental modes (xhtml, html, or xml) are all slightly different:-(</span>
<span class="c"># first get the inherited state's language, if any</span>
<span class="k">if</span> <span class="n">inherited_state</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lang</span> <span class="o">=</span> <span class="n">inherited_state</span><span class="o">.</span><span class="n">lang</span>
<span class="k">else</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lang</span> <span class="o">=</span> <span class="bp">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">supress_lang</span> <span class="o">=</span> <span class="bp">False</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">host_language</span> <span class="ow">in</span> <span class="p">[</span> <span class="n">HostLanguage</span><span class="o">.</span><span class="n">xhtml</span><span class="p">,</span> <span class="n">HostLanguage</span><span class="o">.</span><span class="n">xhtml5</span><span class="p">,</span> <span class="n">HostLanguage</span><span class="o">.</span><span class="n">html5</span> <span class="p">]</span> <span class="p">:</span>
<span class="c"># we may have lang and xml:lang</span>
<span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">hasAttribute</span><span class="p">(</span><span class="s">"lang"</span><span class="p">)</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">getAttribute</span><span class="p">(</span><span class="s">"lang"</span><span class="p">)</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span>
<span class="k">else</span> <span class="p">:</span>
<span class="n">lang</span> <span class="o">=</span> <span class="bp">None</span>
<span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">hasAttribute</span><span class="p">(</span><span class="s">"xml:lang"</span><span class="p">)</span> <span class="p">:</span>
<span class="n">xmllang</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">getAttribute</span><span class="p">(</span><span class="s">"xml:lang"</span><span class="p">)</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span>
<span class="k">else</span> <span class="p">:</span>
<span class="n">xmllang</span> <span class="o">=</span> <span class="bp">None</span>
<span class="c"># First of all, set the value, if any</span>
<span class="k">if</span> <span class="n">xmllang</span> <span class="o">!=</span> <span class="bp">None</span> <span class="p">:</span>
<span class="c"># this has priority</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">xmllang</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lang</span> <span class="o">=</span> <span class="n">xmllang</span>
<span class="k">else</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lang</span> <span class="o">=</span> <span class="bp">None</span>
<span class="k">elif</span> <span class="n">lang</span> <span class="o">!=</span> <span class="bp">None</span> <span class="p">:</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">lang</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lang</span> <span class="o">=</span> <span class="n">lang</span>
<span class="k">else</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lang</span> <span class="o">=</span> <span class="bp">None</span>
<span class="c"># Ideally, a warning should be generated if lang and xmllang are both present with different values. But</span>
<span class="c"># the HTML5 Parser does its magic by overriding a lang value if xmllang is present, so the potential</span>
<span class="c"># error situations are simply swallowed...</span>
<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">host_language</span> <span class="ow">in</span> <span class="n">accept_xml_lang</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">hasAttribute</span><span class="p">(</span><span class="s">"xml:lang"</span><span class="p">)</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lang</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">getAttribute</span><span class="p">(</span><span class="s">"xml:lang"</span><span class="p">)</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lang</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span> <span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">lang</span> <span class="o">=</span> <span class="bp">None</span>
<span class="c">#-----------------------------------------------------------------</span>
<span class="c"># Set the default namespace. Used when generating XML Literals</span>
<span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">hasAttribute</span><span class="p">(</span><span class="s">"xmlns"</span><span class="p">)</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">defaultNS</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">getAttribute</span><span class="p">(</span><span class="s">"xmlns"</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">inherited_state</span> <span class="ow">and</span> <span class="n">inherited_state</span><span class="o">.</span><span class="n">defaultNS</span> <span class="o">!=</span> <span class="bp">None</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">defaultNS</span> <span class="o">=</span> <span class="n">inherited_state</span><span class="o">.</span><span class="n">defaultNS</span>
<span class="k">else</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">defaultNS</span> <span class="o">=</span> <span class="bp">None</span>
<span class="c"># end __init__</span>
</div>
<span class="k">def</span> <span class="nf">_URI</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">val</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""Returns a URI for a 'pure' URI (ie, not a CURIE). The method resolves possible relative URI-s. It also</span>
<span class="sd"> checks whether the URI uses an unusual URI scheme (and issues a warning); this may be the result of an</span>
<span class="sd"> uninterpreted CURIE...</span>
<span class="sd"> @param val: attribute value to be interpreted</span>
<span class="sd"> @type val: string</span>
<span class="sd"> @return: an RDFLib URIRef instance</span>
<span class="sd"> """</span>
<span class="k">def</span> <span class="nf">create_URIRef</span><span class="p">(</span><span class="n">uri</span><span class="p">,</span> <span class="n">check</span> <span class="o">=</span> <span class="bp">True</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> Mini helping function: it checks whether a uri is using a usual scheme before a URIRef is created. In case</span>
<span class="sd"> there is something unusual, a warning is generated (though the URIRef is created nevertheless)</span>
<span class="sd"> @param uri: (absolute) URI string</span>
<span class="sd"> @return: an RDFLib URIRef instance</span>
<span class="sd"> """</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">uri_schemes</span>
<span class="n">val</span> <span class="o">=</span> <span class="n">uri</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span>
<span class="k">if</span> <span class="n">check</span> <span class="ow">and</span> <span class="n">urlsplit</span><span class="p">(</span><span class="n">val</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">uri_schemes</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">add_warning</span><span class="p">(</span><span class="n">err_URI_scheme</span> <span class="o">%</span> <span class="n">val</span><span class="o">.</span><span class="n">strip</span><span class="p">(),</span> <span class="n">node</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">nodeName</span><span class="p">)</span>
<span class="k">return</span> <span class="n">URIRef</span><span class="p">(</span><span class="n">val</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">join</span><span class="p">(</span><span class="n">base</span><span class="p">,</span> <span class="n">v</span><span class="p">,</span> <span class="n">check</span> <span class="o">=</span> <span class="bp">True</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> Mini helping function: it makes a urljoin for the paths. Based on the python library, but</span>
<span class="sd"> that one has a bug: in some cases it</span>
<span class="sd"> swallows the '#' or '?' character at the end. This is clearly a problem with</span>
<span class="sd"> Semantic Web URI-s, so this is checked, too</span>
<span class="sd"> @param base: base URI string</span>
<span class="sd"> @param v: local part</span>
<span class="sd"> @param check: whether the URI should be checked against the list of 'existing' URI schemes</span>
<span class="sd"> @return: an RDFLib URIRef instance</span>
<span class="sd"> """</span>
<span class="c"># UGLY!!! There is a bug for a corner case in python version <= 2.5.X</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">v</span><span class="p">)</span> <span class="o">></span> <span class="mi">0</span> <span class="ow">and</span> <span class="n">v</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="s">'?'</span> <span class="ow">and</span> <span class="p">(</span><span class="n">py_v_major</span> <span class="o"><</span> <span class="mi">3</span> <span class="ow">and</span> <span class="n">py_v_minor</span> <span class="o"><=</span> <span class="mi">5</span><span class="p">)</span> <span class="p">:</span>
<span class="k">return</span> <span class="n">create_URIRef</span><span class="p">(</span><span class="n">base</span><span class="o">+</span><span class="n">v</span><span class="p">,</span> <span class="n">check</span><span class="p">)</span>
<span class="c">####</span>
<span class="n">joined</span> <span class="o">=</span> <span class="n">urljoin</span><span class="p">(</span><span class="n">base</span><span class="p">,</span> <span class="n">v</span><span class="p">)</span>
<span class="k">try</span> <span class="p">:</span>
<span class="k">if</span> <span class="n">v</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="o">!=</span> <span class="n">joined</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="ow">and</span> <span class="p">(</span><span class="n">v</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="o">==</span> <span class="s">"#"</span> <span class="ow">or</span> <span class="n">v</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="o">==</span> <span class="s">"?"</span><span class="p">)</span> <span class="p">:</span>
<span class="k">return</span> <span class="n">create_URIRef</span><span class="p">(</span><span class="n">joined</span> <span class="o">+</span> <span class="n">v</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">],</span> <span class="n">check</span><span class="p">)</span>
<span class="k">else</span> <span class="p">:</span>
<span class="k">return</span> <span class="n">create_URIRef</span><span class="p">(</span><span class="n">joined</span><span class="p">,</span> <span class="n">check</span><span class="p">)</span>
<span class="k">except</span> <span class="p">:</span>
<span class="k">return</span> <span class="n">create_URIRef</span><span class="p">(</span><span class="n">joined</span><span class="p">,</span> <span class="n">check</span><span class="p">)</span>
<span class="k">if</span> <span class="n">val</span> <span class="o">==</span> <span class="s">""</span> <span class="p">:</span>
<span class="c"># The fragment ID must be removed...</span>
<span class="k">return</span> <span class="n">URIRef</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">base</span><span class="p">)</span>
<span class="c"># fall back on good old traditional URI-s.</span>
<span class="c"># To be on the safe side, let us use the Python libraries</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">parsedBase</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="s">""</span> <span class="p">:</span>
<span class="c"># base is, in fact, a local file name</span>
<span class="c"># The following call is just to be sure that some pathological cases when</span>
<span class="c"># the ':' _does_ appear in the URI but not in a scheme position is taken</span>
<span class="c"># care of properly...</span>
<span class="n">key</span> <span class="o">=</span> <span class="n">urlsplit</span><span class="p">(</span><span class="n">val</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">if</span> <span class="n">key</span> <span class="o">==</span> <span class="s">""</span> <span class="p">:</span>
<span class="c"># relative URI, to be combined with local file name:</span>
<span class="k">return</span> <span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">base</span><span class="p">,</span> <span class="n">val</span><span class="p">,</span> <span class="n">check</span> <span class="o">=</span> <span class="bp">False</span><span class="p">)</span>
<span class="k">else</span> <span class="p">:</span>
<span class="k">return</span> <span class="n">create_URIRef</span><span class="p">(</span><span class="n">val</span><span class="p">)</span>
<span class="k">else</span> <span class="p">:</span>
<span class="c"># Trust the python library...</span>
<span class="c"># Well, not quite:-) there is what is, in my view, a bug in the urljoin; in some cases it</span>
<span class="c"># swallows the '#' or '?' character at the end. This is clearly a problem with</span>
<span class="c"># Semantic Web URI-s </span>
<span class="k">return</span> <span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">base</span><span class="p">,</span> <span class="n">val</span><span class="p">)</span>
<span class="c"># end _URI</span>
<span class="k">def</span> <span class="nf">_CURIEorURI</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">val</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""Returns a URI for a (safe or not safe) CURIE. In case it is a safe CURIE but the CURIE itself</span>
<span class="sd"> is not defined, an error message is issued. Otherwise, if it is not a CURIE, it is taken to be a URI</span>
<span class="sd"> @param val: attribute value to be interpreted</span>
<span class="sd"> @type val: string</span>
<span class="sd"> @return: an RDFLib URIRef instance or None</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">val</span> <span class="o">==</span> <span class="s">""</span> <span class="p">:</span>
<span class="k">return</span> <span class="n">URIRef</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">base</span><span class="p">)</span>
<span class="n">safe_curie</span> <span class="o">=</span> <span class="bp">False</span>
<span class="k">if</span> <span class="n">val</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="s">'['</span> <span class="p">:</span>
<span class="c"># If a safe CURIE is asked for, a pure URI is not acceptable.</span>
<span class="c"># Is checked below, and that is why the safe_curie flag is necessary</span>
<span class="k">if</span> <span class="n">val</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="o">!=</span> <span class="s">']'</span> <span class="p">:</span>
<span class="c"># that is certainly forbidden: an incomplete safe CURIE</span>
<span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">add_warning</span><span class="p">(</span><span class="n">err_illegal_safe_CURIE</span> <span class="o">%</span> <span class="n">val</span><span class="p">,</span> <span class="n">UnresolvablePrefix</span><span class="p">,</span> <span class="n">node</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">nodeName</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">None</span>
<span class="k">else</span> <span class="p">:</span>
<span class="n">val</span> <span class="o">=</span> <span class="n">val</span><span class="p">[</span><span class="mi">1</span><span class="p">:</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span>
<span class="n">safe_curie</span> <span class="o">=</span> <span class="bp">True</span>
<span class="c"># There is a branch here depending on whether we are in 1.1 or 1.0 mode</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">rdfa_version</span> <span class="o">>=</span> <span class="s">"1.1"</span> <span class="p">:</span>
<span class="n">retval</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">term_or_curie</span><span class="o">.</span><span class="n">CURIE_to_URI</span><span class="p">(</span><span class="n">val</span><span class="p">)</span>
<span class="k">if</span> <span class="n">retval</span> <span class="o">==</span> <span class="bp">None</span> <span class="p">:</span>
<span class="c"># the value could not be interpreted as a CURIE, ie, it did not produce any valid URI.</span>
<span class="c"># The rule says that then the whole value should be considered as a URI</span>
<span class="c"># except if it was part of a safe CURIE. In that case it should be ignored...</span>
<span class="k">if</span> <span class="n">safe_curie</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">add_warning</span><span class="p">(</span><span class="n">err_no_CURIE_in_safe_CURIE</span> <span class="o">%</span> <span class="n">val</span><span class="p">,</span> <span class="n">UnresolvablePrefix</span><span class="p">,</span> <span class="n">node</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">nodeName</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">None</span>
<span class="k">else</span> <span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_URI</span><span class="p">(</span><span class="n">val</span><span class="p">)</span>
<span class="k">else</span> <span class="p">:</span>
<span class="c"># there is an unlikely case where the retval is actually a URIRef with a relative URI. Better filter that one out</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">retval</span><span class="p">,</span> <span class="n">BNode</span><span class="p">)</span> <span class="o">==</span> <span class="bp">False</span> <span class="ow">and</span> <span class="n">urlsplit</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">retval</span><span class="p">))[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="s">""</span> <span class="p">:</span>
<span class="c"># yep, there is something wrong, a new URIRef has to be created:</span>
<span class="k">return</span> <span class="n">URIRef</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">base</span><span class="o">+</span><span class="nb">str</span><span class="p">(</span><span class="n">retval</span><span class="p">))</span>
<span class="k">else</span> <span class="p">:</span>
<span class="k">return</span> <span class="n">retval</span>
<span class="k">else</span> <span class="p">:</span>
<span class="c"># in 1.0 mode a CURIE can be considered only in case of a safe CURIE</span>
<span class="k">if</span> <span class="n">safe_curie</span> <span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">term_or_curie</span><span class="o">.</span><span class="n">CURIE_to_URI</span><span class="p">(</span><span class="n">val</span><span class="p">)</span>
<span class="k">else</span> <span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_URI</span><span class="p">(</span><span class="n">val</span><span class="p">)</span>
<span class="c"># end _CURIEorURI</span>
<span class="k">def</span> <span class="nf">_TERMorCURIEorAbsURI</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">val</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""Returns a URI either for a term or for a CURIE. The value must be an NCNAME to be handled as a term; otherwise</span>
<span class="sd"> the method falls back on a CURIE or an absolute URI.</span>
<span class="sd"> @param val: attribute value to be interpreted</span>
<span class="sd"> @type val: string</span>
<span class="sd"> @return: an RDFLib URIRef instance or None</span>
<span class="sd"> """</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">uri_schemes</span>
<span class="c"># This case excludes the pure base, ie, the empty value</span>
<span class="k">if</span> <span class="n">val</span> <span class="o">==</span> <span class="s">""</span> <span class="p">:</span>
<span class="k">return</span> <span class="bp">None</span>
<span class="kn">from</span> <span class="nn">.termorcurie</span> <span class="kn">import</span> <span class="n">ncname</span><span class="p">,</span> <span class="n">termname</span>
<span class="k">if</span> <span class="n">termname</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">val</span><span class="p">)</span> <span class="p">:</span>
<span class="c"># This is a term, must be handled as such... </span>
<span class="n">retval</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">term_or_curie</span><span class="o">.</span><span class="n">term_to_URI</span><span class="p">(</span><span class="n">val</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">retval</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">add_warning</span><span class="p">(</span><span class="n">err_undefined_terms</span> <span class="o">%</span> <span class="n">val</span><span class="p">,</span> <span class="n">UnresolvableTerm</span><span class="p">,</span> <span class="n">node</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">nodeName</span><span class="p">,</span> <span class="n">buggy_value</span> <span class="o">=</span> <span class="n">val</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">None</span>
<span class="k">else</span> <span class="p">:</span>
<span class="k">return</span> <span class="n">retval</span>
<span class="k">else</span> <span class="p">:</span>
<span class="c"># try a CURIE</span>
<span class="n">retval</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">term_or_curie</span><span class="o">.</span><span class="n">CURIE_to_URI</span><span class="p">(</span><span class="n">val</span><span class="p">)</span>
<span class="k">if</span> <span class="n">retval</span> <span class="p">:</span>
<span class="k">return</span> <span class="n">retval</span>
<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">rdfa_version</span> <span class="o">>=</span> <span class="s">"1.1"</span> <span class="p">:</span>
<span class="c"># See if it is an absolute URI</span>
<span class="n">scheme</span> <span class="o">=</span> <span class="n">urlsplit</span><span class="p">(</span><span class="n">val</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">if</span> <span class="n">scheme</span> <span class="o">==</span> <span class="s">""</span> <span class="p">:</span>
<span class="c"># bug; there should be no relative URIs here</span>
<span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">add_warning</span><span class="p">(</span><span class="n">err_non_legal_CURIE_ref</span> <span class="o">%</span> <span class="n">val</span><span class="p">,</span> <span class="n">UnresolvablePrefix</span><span class="p">,</span> <span class="n">node</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">nodeName</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">None</span>
<span class="k">else</span> <span class="p">:</span>
<span class="k">if</span> <span class="n">scheme</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">uri_schemes</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">add_warning</span><span class="p">(</span><span class="n">err_URI_scheme</span> <span class="o">%</span> <span class="n">val</span><span class="o">.</span><span class="n">strip</span><span class="p">(),</span> <span class="n">node</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">nodeName</span><span class="p">)</span>
<span class="k">return</span> <span class="n">URIRef</span><span class="p">(</span><span class="n">val</span><span class="p">)</span>
<span class="k">else</span> <span class="p">:</span>
<span class="c"># rdfa 1.0 case</span>
<span class="bp">self</span><span class="o">.</span><span class="n">options</span><span class="o">.</span><span class="n">add_warning</span><span class="p">(</span><span class="n">err_undefined_CURIE</span> <span class="o">%</span> <span class="n">val</span><span class="o">.</span><span class="n">strip</span><span class="p">(),</span> <span class="n">UnresolvablePrefix</span><span class="p">,</span> <span class="n">node</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">nodeName</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">None</span>
<span class="c"># end _TERMorCURIEorAbsURI</span>
<span class="c"># -----------------------------------------------------------------------------------------------</span>
<div class="viewcode-block" id="ExecutionContext.getURI"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ExecutionContext.getURI">[docs]</a> <span class="k">def</span> <span class="nf">getURI</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">attr</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""Get the URI(s) for the attribute. The name of the attribute determines whether the value should be</span>
<span class="sd"> a pure URI, a CURIE, etc, and whether the return is a single element of a list of those. This is done</span>
<span class="sd"> using the L{ExecutionContext._resource_type} table.</span>
<span class="sd"> @param attr: attribute name</span>
<span class="sd"> @type attr: string</span>
<span class="sd"> @return: an RDFLib URIRef instance (or None) or a list of those</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">hasAttribute</span><span class="p">(</span><span class="n">attr</span><span class="p">)</span> <span class="p">:</span>
<span class="n">val</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">node</span><span class="o">.</span><span class="n">getAttribute</span><span class="p">(</span><span class="n">attr</span><span class="p">)</span>
<span class="k">else</span> <span class="p">:</span>
<span class="k">if</span> <span class="n">attr</span> <span class="ow">in</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_list</span> <span class="p">:</span>
<span class="k">return</span> <span class="p">[]</span>
<span class="k">else</span> <span class="p">:</span>
<span class="k">return</span> <span class="bp">None</span>
<span class="c"># This may raise an exception if the attr has no key. This, actually,</span>
<span class="c"># should not happen if the code is correct, but it does not harm having it here...</span>
<span class="k">try</span> <span class="p">:</span>
<span class="n">func</span> <span class="o">=</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_resource_type</span><span class="p">[</span><span class="n">attr</span><span class="p">]</span>
<span class="k">except</span> <span class="p">:</span>
<span class="c"># Actually, this should not happen...</span>
<span class="n">func</span> <span class="o">=</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_URI</span>
<span class="k">if</span> <span class="n">attr</span> <span class="ow">in</span> <span class="n">ExecutionContext</span><span class="o">.</span><span class="n">_list</span> <span class="p">:</span>
<span class="c"># Allows for a list</span>
<span class="n">resources</span> <span class="o">=</span> <span class="p">[</span> <span class="n">func</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">v</span><span class="o">.</span><span class="n">strip</span><span class="p">())</span> <span class="k">for</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">val</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span><span class="o">.</span><span class="n">split</span><span class="p">()</span> <span class="k">if</span> <span class="n">v</span> <span class="o">!=</span> <span class="bp">None</span> <span class="p">]</span>
<span class="n">retval</span> <span class="o">=</span> <span class="p">[</span> <span class="n">r</span> <span class="k">for</span> <span class="n">r</span> <span class="ow">in</span> <span class="n">resources</span> <span class="k">if</span> <span class="n">r</span> <span class="o">!=</span> <span class="bp">None</span> <span class="p">]</span>
<span class="k">else</span> <span class="p">:</span>
<span class="n">retval</span> <span class="o">=</span> <span class="n">func</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">val</span><span class="o">.</span><span class="n">strip</span><span class="p">())</span>
<span class="k">return</span> <span class="n">retval</span>
<span class="c"># end getURI</span>
</div>
<div class="viewcode-block" id="ExecutionContext.getResource"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ExecutionContext.getResource">[docs]</a> <span class="k">def</span> <span class="nf">getResource</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""Get single resources from several different attributes. The first one that returns a valid URI wins.</span>
<span class="sd"> @param args: variable list of attribute names, or a single attribute being a list itself.</span>
<span class="sd"> @return: an RDFLib URIRef instance (or None) :</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">args</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span> <span class="p">:</span>
<span class="k">return</span> <span class="bp">None</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">args</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nb">tuple</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">args</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nb">list</span><span class="p">)</span> <span class="p">:</span>
<span class="n">rargs</span> <span class="o">=</span> <span class="n">args</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="n">rargs</span> <span class="o">=</span> <span class="n">args</span>
<span class="k">for</span> <span class="n">resource</span> <span class="ow">in</span> <span class="n">rargs</span> <span class="p">:</span>
<span class="n">uri</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">getURI</span><span class="p">(</span><span class="n">resource</span><span class="p">)</span>
<span class="k">if</span> <span class="n">uri</span> <span class="o">!=</span> <span class="bp">None</span> <span class="p">:</span> <span class="k">return</span> <span class="n">uri</span>
<span class="k">return</span> <span class="bp">None</span>
<span class="c"># -----------------------------------------------------------------------------------------------</span></div>
<div class="viewcode-block" id="ExecutionContext.reset_list_mapping"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ExecutionContext.reset_list_mapping">[docs]</a> <span class="k">def</span> <span class="nf">reset_list_mapping</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">origin</span><span class="o">=</span><span class="bp">None</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> Reset, ie, create a new empty dictionary for the list mapping.</span>
<span class="sd"> """</span>
<span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span> <span class="o">=</span> <span class="n">ListStructure</span><span class="p">()</span>
<span class="k">if</span> <span class="n">origin</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">set_list_origin</span><span class="p">(</span><span class="n">origin</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">new_list</span> <span class="o">=</span> <span class="bp">True</span>
</div>
<div class="viewcode-block" id="ExecutionContext.list_empty"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ExecutionContext.list_empty">[docs]</a> <span class="k">def</span> <span class="nf">list_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> Checks whether the list is empty.</span>
<span class="sd"> @return: Boolean</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span><span class="o">.</span><span class="n">mapping</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span>
</div>
<div class="viewcode-block" id="ExecutionContext.get_list_props"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ExecutionContext.get_list_props">[docs]</a> <span class="k">def</span> <span class="nf">get_list_props</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> Return the list of property values in the list structure</span>
<span class="sd"> @return: list of URIRef</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span><span class="o">.</span><span class="n">mapping</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span>
</div>
<div class="viewcode-block" id="ExecutionContext.get_list_value"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ExecutionContext.get_list_value">[docs]</a> <span class="k">def</span> <span class="nf">get_list_value</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">prop</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> Return the list of values in the list structure for a specific property</span>
<span class="sd"> @return: list of RDF nodes</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span><span class="o">.</span><span class="n">mapping</span><span class="p">[</span><span class="n">prop</span><span class="p">]</span>
</div>
<div class="viewcode-block" id="ExecutionContext.set_list_origin"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ExecutionContext.set_list_origin">[docs]</a> <span class="k">def</span> <span class="nf">set_list_origin</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">origin</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> Set the origin of the list, ie, the subject to attach the final list(s) to</span>
<span class="sd"> @param origin: URIRef</span>
<span class="sd"> """</span>
<span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span><span class="o">.</span><span class="n">origin</span> <span class="o">=</span> <span class="n">origin</span>
</div>
<div class="viewcode-block" id="ExecutionContext.get_list_origin"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ExecutionContext.get_list_origin">[docs]</a> <span class="k">def</span> <span class="nf">get_list_origin</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> Return the origin of the list, ie, the subject to attach the final list(s) to</span>
<span class="sd"> @return: URIRef</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span><span class="o">.</span><span class="n">origin</span>
</div>
<div class="viewcode-block" id="ExecutionContext.add_to_list_mapping"><a class="viewcode-back" href="../../../../../apidocs/rdflib.plugins.parsers.pyRdfa.html#rdflib.plugins.parsers.pyRdfa.state.ExecutionContext.add_to_list_mapping">[docs]</a> <span class="k">def</span> <span class="nf">add_to_list_mapping</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="nb">property</span><span class="p">,</span> <span class="n">resource</span><span class="p">)</span> <span class="p">:</span>
<span class="sd">"""Add a new property-resource on the list mapping structure. The latter is a dictionary of arrays;</span>
<span class="sd"> if the array does not exist yet, it will be created on the fly.</span>
<span class="sd"> </span>
<span class="sd"> @param property: the property URI, used as a key in the dictionary</span>
<span class="sd"> @param resource: the resource to be added to the relevant array in the dictionary. Can be None; this is a dummy</span>
<span class="sd"> placeholder for C{<span rel="property" inlist>...</span>} constructions that may be filled in by children or siblings; if not</span>
<span class="sd"> an empty list has to be generated.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="nb">property</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span><span class="o">.</span><span class="n">mapping</span> <span class="p">:</span>
<span class="k">if</span> <span class="n">resource</span> <span class="o">!=</span> <span class="bp">None</span> <span class="p">:</span>
<span class="c"># indeed, if it is None, than it should not override anything</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span><span class="o">.</span><span class="n">mapping</span><span class="p">[</span><span class="nb">property</span><span class="p">]</span> <span class="o">==</span> <span class="bp">None</span> <span class="p">:</span>
<span class="c"># replacing a dummy with real content</span>
<span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span><span class="o">.</span><span class="n">mapping</span><span class="p">[</span><span class="nb">property</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span> <span class="n">resource</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">list_mapping</span><span class="o">.</span><span class="n">mapping</span><span class="p">[</span><span class="nb">property</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">resource</span><span class="p">)</span>
<span class="k">else</span> <span class="p">:</span>
<span class="k">if</span> <span class="n">resource</span> <span class="o">!=</span> <span class="bp">None</span> <span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">list_mapping</span><span class="o">.</span><span class="n">mapping</span><span class="p">[</span><span class="nb">property</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span> <span class="n">resource</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">list_mapping</span><span class="o">.</span><span class="n">mapping</span><span class="p">[</span><span class="nb">property</span><span class="p">]</span> <span class="o">=</span> <span class="bp">None</span>
<span class="c">####################</span></div></div>
</pre></div>
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