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package WebService::Lucene::XOXOParser; |
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use strict; |
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use warnings; |
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use XML::LibXML; |
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BEGIN { |
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for my $name ( qw( dl dd dt ) ) { |
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no strict 'refs'; |
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*$name = sub { _make_element( $name, @_ ) } |
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} |
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} |
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my %pattern_lut = ( |
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'&' => 'amp', |
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'<' => 'lt', |
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'>' => 'gt', |
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'"' => 'quot', |
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"'" => 'apos', |
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); |
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my $pattern = join( '|', keys %pattern_lut ); |
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=head1 NAME |
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WebService::Lucene::XOXOParser - Simple XOXO Parser |
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=head1 SYNOPSIS |
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use WebService::Lucene::XOXOParser; |
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my $parser = WebService::Lucene::XOXOParser->new; |
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my @properties = $parser->parse( $xml ); |
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=head1 DESCRIPTION |
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This module provides simple XOXO parsing for Lucene documents. |
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=head1 METHODS |
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=head2 new( ) |
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Creates a new parser instance. |
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=cut |
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sub new { |
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my ( $class ) = @_; |
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return bless {}, $class; |
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} |
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=head2 parse( $xml ) |
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Parses XML and returns an array of hashrefs decribing each |
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property. |
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=cut |
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sub parse { |
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my ( $self, $xml ) = @_; |
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my $parser = XML::LibXML->new; |
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my $root = $parser->parse_string( $xml )->documentElement; |
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my @nodes = $root->findnodes( '//dt | //dd' ); |
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my @properties; |
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while ( @nodes ) { |
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my ( $term, $value ) = ( shift( @nodes ), shift( @nodes ) ); |
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my $property = { |
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name => $term->textContent, |
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value => $value->textContent, |
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map { $_->name => $_->value } $term->attributes |
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}; |
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push @properties, $property; |
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} |
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return @properties; |
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} |
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=head2 construct( @properties ) |
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Takes an array of properties and constructs |
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an XOXO XML structure. |
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=cut |
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sub construct { |
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my ( $self, @properties ) = @_; |
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return dl( |
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{ class => 'xoxo' }, |
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map { |
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my $node = $_; |
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dt( { map { $_ => $node->{ $_ } } |
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grep { $_ !~ /^(name|value)$/ } keys %$_ |
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}, |
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$self->encode_entities( $_->{ name } ) |
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), |
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dd( $self->encode_entities( $_->{ value } ) ) |
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} @properties |
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); |
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} |
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sub _make_element { |
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my $element = shift; |
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my $output = "<$element"; |
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if ( ref $_[ 0 ] ) { |
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my $attrs = shift; |
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$output .= ' '; |
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$output .= join( ' ', |
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map { qq($_=") . $attrs->{ $_ } . '"' } keys %$attrs ); |
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} |
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$output .= join( '', '>', @_, "$element>" ); |
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return $output; |
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} |
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=head2 encode_entities( $value ) |
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Escapes some chars to their entities. |
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=cut |
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sub encode_entities { |
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my $self = shift; |
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my $value = shift; |
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$value =~ s/($pattern)/&$pattern_lut{$1};/gso; |
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return $value; |
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} |
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=head2 dl |
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135
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Shortcut to create a definition list |
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=head2 dt |
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Shortcut to create a definition term |
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=head2 dd |
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Shortcut to create a definition description |
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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; |