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package SemanticWeb::OAI::ORE::RDFXML; |
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#$Id: RDFXML.pm,v 1.6 2010-12-06 14:44:15 simeon Exp $ |
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=head1 NAME |
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SemanticWeb::OAI::ORE::RDFXML - Parse/serialize OAI-ORE Resource Maps in RDF/XML format |
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=head1 SYNPOSIS |
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Module to parse and serialize OAI-ORE resource maps in RDF/XML format. |
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See L. |
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=cut |
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use strict; |
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use warnings; |
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use Carp; |
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use SemanticWeb::OAI::ORE::ReM; |
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use RDF::Core::Storage::Memory; |
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use RDF::Core::Model; |
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use RDF::Core::Model::Parser; |
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use RDF::Core::Model::Serializer; |
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=head1 METHODS |
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=head2 new() |
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Create a new RDFXML handler object. |
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=cut |
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sub new { |
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my $class=shift; |
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my $self={@_}; |
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bless $self, (ref($class) || $class); |
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return($self); |
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} |
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=head2 parse($rdfxml,$uri_rem) |
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Parse input string or read from open filehandle $rdfxml which contains the |
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RDF/XML serialization of the ReM with base URI $uri_rem. A base URI must be |
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supplied otherwise the parser (L) will fail. |
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Returns a L model. |
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=cut |
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sub parse { |
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my $self=shift; |
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my ($rdfxml,$uri_rem)=@_; |
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# Read in file if necessary |
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if (ref($rdfxml)) { |
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# Assume filehandle |
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my $fh=$rdfxml; |
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local $/=undef; #to slurp file |
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$rdfxml=<$fh>; |
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} |
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my $storage=RDF::Core::Storage::Memory->new(); |
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my $model=RDF::Core::Model->new(Storage => $storage); |
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# The BaseURI must be supplied otherwise the parser will fail |
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my $parser=RDF::Core::Model::Parser->new(Model=>$model, |
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BaseURI=>$uri_rem, |
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Source=>$rdfxml, |
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SourceType=>'string'); |
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$parser->parse(); |
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return($model); |
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} |
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=head2 serialize() |
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Serialize resource map as RDF/XML. Returns serializetion |
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as a string. |
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See L and L. |
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=cut |
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sub serialize { |
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my $self=shift; |
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my $out=''; |
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my $rem=$self->{rem}; |
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if (ref($rem) and $rem->isa('SemanticWeb::OAI::ORE::ReM')) { |
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# Get the info from the ReM |
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$out.="\n"; |
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$out.="\n"; |
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# Do not specify a BaseURI option as we do not want relative URIs in output |
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my $serializer = RDF::Core::Model::Serializer->new(Model=>$rem->model, |
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Output => \$out); |
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$serializer->serialize; |
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} else { |
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die "Can't serialize something that isn't a resource map: have a ".ref($rem)."\n"; |
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} |
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return($out); |
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} |
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=head1 SEE ALSO |
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L |
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=head1 AUTHORS |
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Simeon Warner |
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=head1 LICENSE AND COPYRIGHT |
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Copyright 2007-2010 Simeon Warner. |
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This module is free software; you can redistribute it and/or |
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modify it under the same terms as Perl itself. See L. |
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=cut |
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1; |