/usr/share/doc/libxapian-ruby1.9.1/examples/simpleexpand.rb is in libxapian-ruby1.9.1 1.2.8-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 | #!/usr/bin/env ruby
#
# Simple example script demonstrating query expansion.
#
# Originally by Paul Legato (plegato@nks.net), 4/22/06.
#
# Copyright (C) 2006 Networked Knowledge Systems, Inc.
# Copyright (C) 2006,2007 Olly Betts
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
# USA
require 'xapian'
if ARGV.size < 2
$stderr.puts "Usage: #{$0} PATH_TO_DATABASE QUERY [-- [DOCID...]]"
exit 99
end
# Open the database for searching.
database = Xapian::Database.new(ARGV[0])
# Start an enquire session.
enquire = Xapian::Enquire.new(database)
queryString = ''
relevantDocs = Xapian::RSet.new()
onDocIdsYet = false
# Combine the rest of the command line arguments with spaces between
# them, so that simple queries don't have to be quoted at the shell
# level.
ARGV.each_with_index { |arg,index|
next if index == 0 # skip path to db
if arg == '--'
onDocIdsYet = true
next
end
if onDocIdsYet
relevantDocs.add_document(arg.to_i)
else
queryString += ' ' unless queryString.empty?
queryString += arg
end
}
# Parse the query string to produce a Xapian::Query object.
qp = Xapian::QueryParser.new()
stemmer = Xapian::Stem.new("english")
qp.stemmer = stemmer
qp.database = database
qp.stemming_strategy = Xapian::QueryParser::STEM_SOME
query = qp.parse_query(queryString)
unless query.empty?
puts "Parsed query is: #{query.description()}"
# Find the top 10 results for the query.
enquire.query = query
matchset = enquire.mset(0, 10, relevantDocs)
# Display the results.
puts "#{matchset.matches_estimated()} results found."
puts "Matches 1-#{matchset.size}:\n"
matchset.matches.each {|m|
puts "#{m.rank + 1}: #{m.percent}% docid=#{m.docid} [#{m.document.data}]\n"
}
end
# Put the top 5 (at most) docs into the rset if rset is empty
if relevantDocs.empty?
matchset.matches[0..4].each {|match|
relevantDocs.add_document(match.docid())
}
end
# Get the suggested expand terms
expandTerms = enquire.eset(10, relevantDocs)
puts "#{expandTerms.size()} suggested additional terms:"
expandTerms.terms.each {|term|
puts " * Term \"#{term.name}\", weight #{term.weight}"
}
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