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#!/usr/bin/perl
#
# A sample indexer which demonstrates many of Xapian's commonly used features.
#
# Copyright (C) 2009 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
use 5.006;
use strict;
use warnings;
use Search::Xapian (':all');
use POSIX;
# Constants denoting what we're using the number value slots for.
my $SLOT_DATE = 0;
my $SLOT_DOCNUM = 1;
my $SLOT_TYPE = 2;
my $SLOT_AUTHOR = 3;
my $SLOT_TITLE = 4;
# We want exactly one command line argument.
if (scalar @ARGV != 1) {
print STDERR "Usage: $0 PATH_TO_DATABASE\n";
exit 1;
}
my ($database, $indexer);
eval {
# Open the database for writing. If it doesn't exist, create it.
$database = Search::Xapian::WritableDatabase->new(
$ARGV[0],
DB_CREATE_OR_OPEN);
# Set up a TermGenerator to index text stemmed with the "english" stemmer.
$indexer = Search::Xapian::TermGenerator->new();
my $stemmer = Search::Xapian::Stem->new("english");
$indexer->set_stemmer($stemmer);
};
if ($@) {
# Report the exception which we've caught.
print STDERR "Exception: $@\n";
exit 1;
}
# Add some documents to the index (in a real indexer, this data would come from
# some external source like a file or a database).
index_document(
"The Old Man and the Sea",
"Ernest Hemingway",
"Santiago goes fishing, without much success.",
"978-0-684-80122-3",
"1952-09-01",
"book"
);
index_document(
"Star Wars",
"George Lucas",
"Luke goes to meet his destiny in the stars.",
"tt0076759",
"1977-05-25",
"film"
);
index_document(
"Accidental Death of an Anarchist",
"Dario Fo",
"An anarchist dies, accidentally!",
"12345",
"1970-12-10",
"play"
);
sub index_document {
my ($doc_name, $author, $keywords, $doc_number, $date, $type) = @_;
eval {
my $doc = Search::Xapian::Document->new();
$indexer->set_document($doc);
# Set the document data to the doc_name so we can show it for matches.
$doc->set_data($doc_name);
# Index the author to allow fielded free-text searching.
$indexer->index_text($author, 1, "A");
# Index the title to allow fielded free-text searching.
$indexer->index_text($doc_name, 1, "S");
# Index the title without a prefix too.
$indexer->index_text($doc_name);
# Increase the term position so that phrases can't straddle the
# doc_name and keywords.
$indexer->increase_termpos();
# Index the keywords as free-text.
$indexer->index_text($keywords);
# Unique ID.
$doc->add_term("Q" . $doc_number);
# To allow boolean filtering by type.
$doc->add_term("XTYPE" . lc $type);
# To allow date range searching and sorting by date.
if ($date =~ /^(\d{4})-(\d\d)-(\d\d)$/) {
# DateValueRangeProcessor wants values in the form "YYYYMMDD".
$doc->add_value($SLOT_DATE, "$1$2$3");
}
# To allow sorting by document number.
$doc->add_value($SLOT_DOCNUM, $doc_number);
# To allow sorting by document type.
$doc->add_value($SLOT_TYPE, lc $type);
# To allow sorting by author.
$doc->add_value($SLOT_AUTHOR, $author);
# To allow sorting by title..
$doc->add_value($SLOT_TITLE, $doc_name);
# Add the document to the database.
$database->add_document($doc);
};
if ($@) {
# Report the exception which we've caught.
print STDERR "Exception: $@\n";
exit 1;
}
}
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