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# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
use strict;
use warnings;
use lib 'buildlib';
package MyRegexTokenizer;
use base qw( Lucy::Analysis::Analyzer );
use Lucy::Analysis::Inversion;
sub transform {
my ( $self, $inversion ) = @_;
my $new_inversion = Lucy::Analysis::Inversion->new;
while ( my $token = $inversion->next ) {
for ( $token->get_text ) {
my $this_time = /z/ ? 1 : 0;
# Accumulate token start_offsets and end_offsets.
while (/(\w)/g) {
# Special boost just for one doc.
my $boost = ( $1 eq 'a' and $this_time ) ? 100 : 1;
$new_inversion->append(
Lucy::Analysis::Token->new(
text => "$1",
start_offset => $-[0],
end_offset => $+[0],
boost => $boost,
),
);
}
}
}
return $new_inversion;
}
sub equals {
my ( $self, $other ) = @_;
return 0 unless ref($self) eq ref($other);
return 1;
}
package RichSim;
use base qw( Lucy::Index::Similarity );
use Lucy::Index::Posting::RichPosting;
sub make_posting {
Lucy::Index::Posting::RichPosting->new( similarity => shift );
}
package MySchema::boosted;
use base qw( Lucy::Plan::FullTextType );
sub make_similarity { RichSim->new }
package MySchema;
use base qw( Lucy::Plan::Schema );
use Lucy::Analysis::RegexTokenizer;
sub new {
my $self = shift->SUPER::new(@_);
my $plain_type = Lucy::Plan::FullTextType->new(
analyzer => Lucy::Analysis::RegexTokenizer->new );
my $boosted_type
= MySchema::boosted->new( analyzer => MyRegexTokenizer->new, );
$self->spec_field( name => 'plain', type => $plain_type );
$self->spec_field( name => 'boosted', type => $boosted_type );
return $self;
}
package main;
use Test::More tests => 2;
my $good = "x x x a a x x x x x x x x";
my $better = "x x x a a a x x x x x x x";
my $best = "x x x a a a a a a a a a a";
my $boosted = "z x x a x x x x x x x x x";
my $schema = MySchema->new;
my $folder = Lucy::Store::RAMFolder->new;
my $indexer = Lucy::Index::Indexer->new(
schema => $schema,
index => $folder,
);
for ( $good, $better, $best, $boosted ) {
$indexer->add_doc( { plain => $_, boosted => $_ } );
}
$indexer->commit;
my $searcher = Lucy::Search::IndexSearcher->new( index => $folder );
my $q_for_plain = Lucy::Search::TermQuery->new(
field => 'plain',
term => 'a',
);
my $hits = $searcher->hits( query => $q_for_plain );
is( $hits->next->{plain},
$best, "verify that search on unboosted field returns best match" );
my $q_for_boosted = Lucy::Search::TermQuery->new(
field => 'boosted',
term => 'a',
);
$hits = $searcher->hits( query => $q_for_boosted );
is( $hits->next->{boosted},
$boosted, "artificially boosted token overrides better match" );
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