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## ------------------------------------------------------------------------ |
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## $Id: XML.pm,v 1.4 2003/06/06 03:58:13 joko Exp $ |
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## ------------------------------------------------------------------------ |
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## $Log: XML.pm,v $ |
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## Revision 1.4 2003/06/06 03:58:13 joko |
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## minor updates to logging |
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## |
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## Revision 1.3 2003/05/13 08:08:17 joko |
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## comments, todos |
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## |
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## Revision 1.2 2003/02/21 07:58:48 joko |
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## enhanced error detection |
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## |
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## Revision 1.1 2003/02/20 20:20:54 joko |
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## + initial commit |
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## |
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## ------------------------------------------------------------------------ |
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|
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|
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package Data::Storage::Handler::XML; |
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|
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use strict; |
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use warnings; |
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|
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use base qw( |
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DesignPattern::Object |
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DesignPattern::Logger |
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); |
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|
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|
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# TODO: Load them on demand! |
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use Data::Dumper; |
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#use Data::Storage::Handler::File::Basic qw( s2f a2f f2s ); |
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use XML::Simple; |
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use XML::Parser; |
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use XML::Parser::EasyTree; |
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use XML::XPath; |
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# TODO: use XML::Writer and/or XML::ValidWriter |
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|
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|
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# get logger instance |
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my $logger = Log::Dispatch::Config->instance; |
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|
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sub sendQuery { |
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my $self = shift; |
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my $xpq = shift; |
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my $options = shift; |
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|
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$self->log( "xpq='$xpq'", 'debug' ); |
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|
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# trace |
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#print Dumper($self); |
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#exit; |
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|
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my $file = $self->{filename}; |
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|
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if (!$file) { |
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$logger->error("No filename given."); |
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return; |
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} |
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|
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if (! -e $file) { |
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$logger->error("File not found: '$file'."); |
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return; |
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} |
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|
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#print "file: $file", "\n"; |
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#print "xpq: $xpq", "\n"; |
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|
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$logger->debug( __PACKAGE__ . "->sendQuery - File: $file, xpq: $xpq"); |
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|
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# filter nodes by xpath-query |
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my $xp = XML::XPath->new( filename => $file ); |
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my $nodeset = $xp->find($xpq); |
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|
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# build result xml |
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my $buffer; |
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foreach my $node ($nodeset->get_nodelist) { |
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$buffer .= XML::XPath::XMLParser::as_string($node) . "\n\n"; |
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} |
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#$buffer .= ''; |
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#$buffer = "<result>$buffer</result>"; |
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|
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# trace |
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#print $buffer, "\n"; |
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#exit; |
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|
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$self->{buffer} = $buffer; |
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|
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} |
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|
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sub getResult { |
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my $self = shift; |
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return $self->{buffer}; |
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} |
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|
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sub circumflex { |
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my $self = shift; |
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my $tag = shift; |
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# mungle result payload |
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$self->{buffer} = "<$tag>" . $self->{buffer} . "</$tag>" if $self->{buffer}; |
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} |
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|
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sub isEmpty { |
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my $self = shift; |
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return not defined $self->{buffer}; |
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} |
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|
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sub toEasyTree { |
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my $self = shift; |
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|
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$XML::Parser::EasyTree::Noempty = 1; |
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# what about ... |
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#$XML::Parser::EasyTree::Latin = 1; |
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# ... instead of an otherwise required |
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# "expand" with proper utf8/latin-conversion |
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# parameters set? |
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|
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# convert xml data to native perl data structure |
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#my $parser = XML::Parser->new( Style => 'EasyTree', Handlers => { Char => sub { my $char = shift; print "char: ", Dumper($char), "\n"; } } ); |
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#my $parser = XML::Parser->new( Style => 'EasyTree', Handlers => { Char => sub {} } ); |
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my $parser = XML::Parser->new( Style => 'EasyTree' ); |
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my $data = $parser->parse($self->{buffer}); |
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|
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# trace |
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#print Dumper($data); |
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#exit; |
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|
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# FIXME!? |
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my $hash = $data->[0]; |
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|
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# trace |
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#print Dumper($hash); |
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#exit; |
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|
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#$self->{payload} = $hash; |
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return $hash; |
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|
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} |
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|
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sub toSimpleTree { |
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my $self = shift; |
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#print $self->{buffer}; |
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#exit; |
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#$self->{payload} = XMLin($self->{buffer}); |
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return XMLin($self->{buffer}); |
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} |
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|
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|
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1; |
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__END__ |
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