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package WebService::Lucene::Iterator; |
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use strict; |
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use warnings; |
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use base qw( Class::Accessor::Fast ); |
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use WebService::Lucene::Document; |
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__PACKAGE__->mk_accessors( qw( iterator ) ); |
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=head1 NAME |
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WebService::Lucene::Iterator - Iterator for lazy document inflation |
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=head1 SYNOPSIS |
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use WebService::Lucene::Iterator; |
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my $iterator = WebService::Lucene::Iterator->new( $documents ); |
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=head1 DESCRIPTION |
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All search results are returned as L objects |
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which get inflated to L objects. |
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This module allows us to delay that inflation as late as possible. |
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=head1 METHODS |
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=head2 new( $documents ) |
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Generates a new iterator that will iterate through |
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C<$documents> as requested. |
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=cut |
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sub new { |
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my ( $class, $documents ) = @_; |
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my $self = $class->SUPER::new; |
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my $index = 0; |
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$self->iterator( |
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sub { |
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my $document = $documents->[ $index ]; |
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return undef unless $document; |
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$index++; |
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return WebService::Lucene::Document->new_from_entry( $document ); |
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} |
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); |
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return $self; |
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} |
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=head2 iterator( [$iterator] ) |
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Accessor for the iterator closure. |
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=head2 next( ) |
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Inflates and returns the next document object. |
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=cut |
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sub next { |
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return shift->iterator->(); |
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} |
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=head1 AUTHORS |
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=over 4 |
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=item * Brian Cassidy Ebrian.cassidy@nald.caE |
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=item * Adam Paynter Eadam.paynter@nald.caE |
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=back |
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=head1 COPYRIGHT AND LICENSE |
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Copyright 2006-2009 National Adult Literacy Database |
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This library is free software; you can redistribute it and/or modify |
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it under the same terms as Perl itself. |
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=cut |
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1; |