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package WebService::Lucene::Index; |
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use strict; |
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use warnings; |
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use base qw( WebService::Lucene::Client Class::Accessor::Fast ); |
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use URI; |
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use Carp qw( croak ); |
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use WebService::Lucene::XOXOParser; |
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use WebService::Lucene::Results; |
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use WebService::Lucene::Document; |
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use XML::Atom::Entry; |
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use HTTP::Request; |
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use WWW::OpenSearch; |
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use Encode (); |
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__PACKAGE__->mk_accessors( |
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qw( |
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base_url name properties_ref _opensearch_client |
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) |
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); |
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=head1 NAME |
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WebService::Lucene::Index - Object to represent a Lucene Index |
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=head1 SYNOPSIS |
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# Index @ $url |
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$index = WebService::Lucene::Index->new( $url ); |
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# Get most recently modified documents |
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$results = $index->list; |
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# Search the index |
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$results = $index->search( 'foo' ); |
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# Get a document |
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$doc = $index->get_document( $id ); |
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# Create a document |
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$doc = $index->create_document( $doc ); |
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# Delete the index |
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$index->delete; |
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=head1 DESCRIPTION |
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The module represents a Lucene Index. |
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=head1 METHODS |
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=head2 new( $url ) |
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Create a new Index object located at C<$url>. Note, this will |
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not actually create the index -- see C to do that. |
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=cut |
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sub new { |
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my ( $class, $url ) = @_; |
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croak( "No URL specified" ) unless $url; |
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if ( !ref $url ) { |
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$url =~ s{/?$}{/}; |
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$url = URI->new( $url ); |
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} |
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my ( $name ) = $url =~ m{/([^/]+)/?$}; |
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my $self = $class->SUPER::new; |
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$self->base_url( $url ); |
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$self->name( $name ); |
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return $self; |
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} |
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=head2 base_url( [$url] ) |
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Accessor for the index's url. |
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=head2 name( [$name] ) |
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Accessor for the index's name. |
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=head2 properties( [$properties] ) |
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Accessor for the index's properties. |
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=cut |
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sub properties { |
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my $self = shift; |
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if ( !$self->properties_ref ) { |
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$self->_fetch_index_properties; |
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} |
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return $self->properties_ref; |
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} |
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=head2 _fetch_index_properties( ) |
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Fetches the C entry and sends the contents |
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to C<_parse_index_properties>. |
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=cut |
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sub _fetch_index_properties { |
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my ( $self ) = @_; |
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my $entry = $self->getEntry( |
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URI->new_abs( 'index.properties', $self->base_url ) ); |
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$self->_parse_index_properties( $entry->content->body ); |
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} |
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=head2 _parse_index_properties( $xml ) |
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Parses the XOXO document and sets the C accessor. |
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=cut |
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sub _parse_index_properties { |
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my ( $self, $xml ) = @_; |
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$self->properties_ref( |
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{ map { $_->{ name } => $_->{ value } } |
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WebService::Lucene::XOXOParser->parse( $xml ) |
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} |
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); |
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} |
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=head2 delete( ) |
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Deletes the current index. |
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=cut |
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sub delete { |
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my ( $self ) = @_; |
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$self->deleteEntry( $self->base_url ); |
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} |
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=head2 update( ) |
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Updates the C file with the current set of properties. |
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=cut |
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sub update { |
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my ( $self ) = @_; |
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$self->updateEntry( URI->new_abs( 'index.properties', $self->base_url ), |
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$self->_properties_as_entry ); |
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} |
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=head2 facets( $facets, [$params] ) |
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159
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Give a facet (or set of facets as an array reference), it will |
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return a L object with their details. You |
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can pass any number of parameters that will be serialized as query |
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string arguments. |
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164
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=cut |
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sub facets { |
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my ( $self, $facet, $params ) = @_; |
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my $name = ref $facet ? join( ',', @$facet ) : $facet; |
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my $client = $self->opensearch_client; |
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my $os_url = $client->description->get_best_url; |
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my $url = $os_url->prepare_query( $params ); |
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$url->path( $url->path . "/facets/$name" ); |
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return WebService::Lucene::Results->new_from_feed( |
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$self->getFeed( $url ) ); |
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} |
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=head2 list( [$params] ) |
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Returns a L object with a list of the recently updated documents. |
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184
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=cut |
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sub list { |
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my ( $self, $params ) = @_; |
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my $url = $self->base_url->clone; |
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$url->query_form( $params ) if $params; |
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return WebService::Lucene::Results->new_from_feed( |
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$self->getFeed( $url ) ); |
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} |
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=head2 optimize( ) |
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Optimizes the index. |
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=cut |
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200
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sub optimize { |
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my ( $self ) = @_; |
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my $request = HTTP::Request->new( PUT => $self->base_url . '?optimize' ); |
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return $self->make_request( $request ); |
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} |
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206
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=head2 create( ) |
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Sends a create query to the server for the given index. |
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=cut |
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212
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sub create { |
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my ( $self ) = @_; |
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my $name = $self->name; |
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my $url = $self->base_url; |
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217
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$url =~ s{$name/?$}{}; |
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219
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$self->createEntry( $url, $self->_properties_as_entry ); |
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221
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return $self; |
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} |
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224
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=head2 add_document( $document ) |
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226
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Adds C<$document> to the index. |
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228
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=cut |
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230
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sub add_document { |
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my ( $self, $document ) = @_; |
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$document->base_url( URI->new_abs( 'new', $self->base_url ) ); |
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return $document->create; |
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} |
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236
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=head2 get_document( $id ) |
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238
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Returns a L. |
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240
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=cut |
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242
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sub get_document { |
243
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my ( $self, $id ) = @_; |
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my $entry = $self->getEntry( URI->new_abs( $id, $self->base_url ) ); |
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246
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return WebService::Lucene::Document->new_from_entry( $entry ); |
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} |
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249
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=head2 delete_document( $id ) |
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251
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Deletes a document from the index |
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253
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=cut |
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255
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sub delete_document { |
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my ( $self, $id ) = @_; |
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my $document = WebService::Lucene::Document->new; |
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$document->base_url( URI->new_abs( $id, $self->base_url ) ); |
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return $document->delete; |
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} |
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263
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=head2 _properties_as_entry( ) |
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265
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Constructs an L object representing the index's properties. |
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267
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=cut |
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269
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sub _properties_as_entry { |
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my ( $self ) = @_; |
271
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272
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my $entry = XML::Atom::Entry->new; |
273
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$entry->title( $self->name ); |
274
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275
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my $props = $self->properties_ref; |
276
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my @properties = map +{ name => $_, value => $props->{ $_ } }, |
277
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keys %$props; |
278
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my $xml = WebService::Lucene::XOXOParser->construct( @properties ); |
279
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280
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$entry->content( $xml ); |
281
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$entry->content->type( 'xhtml' ); |
282
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283
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return $entry; |
284
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} |
285
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286
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=head2 opensearch_client( ) |
287
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288
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returns an WWW::OpenSearch object for the index. |
289
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290
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=cut |
291
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292
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sub opensearch_client { |
293
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my ( $self ) = @_; |
294
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295
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|
if ( !$self->_opensearch_client ) { |
296
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|
$self->_opensearch_client( |
297
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|
WWW::OpenSearch->new( |
298
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|
URI->new_abs( 'opensearchdescription.xml', $self->base_url ) |
299
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) |
300
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); |
301
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} |
302
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303
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|
return $self->_opensearch_client; |
304
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} |
305
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306
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|
=head2 search( $query, [$params] ) |
307
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|
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|
308
|
|
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|
|
Searches the index for C<$query>. Pass any additional parameters as |
309
|
|
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|
|
a hashref. |
310
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311
|
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|
=cut |
312
|
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|
313
|
|
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|
|
|
|
sub search { |
314
|
|
|
|
|
|
|
my ( $self, $query, $params ) = @_; |
315
|
|
|
|
|
|
|
|
316
|
|
|
|
|
|
|
my $client = $self->opensearch_client; |
317
|
|
|
|
|
|
|
|
318
|
|
|
|
|
|
|
Encode::_utf8_off( $query ); |
319
|
|
|
|
|
|
|
my $response = $client->search( $query, $params ); |
320
|
|
|
|
|
|
|
Encode::_utf8_on( $query ); |
321
|
|
|
|
|
|
|
|
322
|
|
|
|
|
|
|
return WebService::Lucene::Results->new_from_opensearch( $response ); |
323
|
|
|
|
|
|
|
} |
324
|
|
|
|
|
|
|
|
325
|
|
|
|
|
|
|
=head2 exists( ) |
326
|
|
|
|
|
|
|
|
327
|
|
|
|
|
|
|
True if the index exists on the server, otherwise false is returned. |
328
|
|
|
|
|
|
|
|
329
|
|
|
|
|
|
|
=cut |
330
|
|
|
|
|
|
|
|
331
|
|
|
|
|
|
|
sub exists { |
332
|
|
|
|
|
|
|
my ( $self ) = @_; |
333
|
|
|
|
|
|
|
my $request = HTTP::Request->new( HEAD => $self->base_url ); |
334
|
|
|
|
|
|
|
my $response = eval { $self->make_request( $request ); }; |
335
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
if ( my $e = WebService::Lucene::Exception->caught ) { |
337
|
|
|
|
|
|
|
return 0 if $e->response->code eq '404'; |
338
|
|
|
|
|
|
|
$e->rethrow; |
339
|
|
|
|
|
|
|
} |
340
|
|
|
|
|
|
|
|
341
|
|
|
|
|
|
|
return 1; |
342
|
|
|
|
|
|
|
} |
343
|
|
|
|
|
|
|
|
344
|
|
|
|
|
|
|
=head1 AUTHORS |
345
|
|
|
|
|
|
|
|
346
|
|
|
|
|
|
|
=over 4 |
347
|
|
|
|
|
|
|
|
348
|
|
|
|
|
|
|
=item * Brian Cassidy Ebrian.cassidy@nald.caE |
349
|
|
|
|
|
|
|
|
350
|
|
|
|
|
|
|
=item * Adam Paynter Eadam.paynter@nald.caE |
351
|
|
|
|
|
|
|
|
352
|
|
|
|
|
|
|
=back |
353
|
|
|
|
|
|
|
|
354
|
|
|
|
|
|
|
=head1 COPYRIGHT AND LICENSE |
355
|
|
|
|
|
|
|
|
356
|
|
|
|
|
|
|
Copyright 2006-2009 National Adult Literacy Database |
357
|
|
|
|
|
|
|
|
358
|
|
|
|
|
|
|
This library is free software; you can redistribute it and/or modify |
359
|
|
|
|
|
|
|
it under the same terms as Perl itself. |
360
|
|
|
|
|
|
|
|
361
|
|
|
|
|
|
|
=cut |
362
|
|
|
|
|
|
|
|
363
|
|
|
|
|
|
|
1; |