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## ---------------------------------------------------------------------- |
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## $Id: Metadata.pm,v 1.4 2004/06/20 16:12:24 joko Exp $ |
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## ---------------------------------------------------------------------- |
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## $Log: Metadata.pm,v $ |
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## Revision 1.4 2004/06/20 16:12:24 joko |
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## + sub indexTargets |
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## modified getTargetDetails to use cached target details |
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## |
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## Revision 1.3 2003/03/29 07:13:19 joko |
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## better exception handling if target was not found in xml |
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## |
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## Revision 1.2 2003/02/20 20:04:35 joko |
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## renamed methods |
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## - refactored xml-specific code to Data::Storage::Handler::XML |
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## |
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## Revision 1.1 2003/02/18 15:35:49 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::Rap::Metadata; |
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|
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use strict; |
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use warnings; |
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|
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|
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use Data::Dumper; |
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use DesignPattern::Object; |
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use Storable; |
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use File::Basename qw( dirname ); |
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|
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|
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sub accessMetadata { |
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my $self = shift; |
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|
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# create instance of storage object once |
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if (!$self->{__rap}->{metadbengine}) { |
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$self->{__rap}->{metadbengine} = |
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DesignPattern::Object->fromPackage('Data::Storage::Handler::XML', filename => $self->{__rap}->{filename} ); |
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} |
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|
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return $self->{__rap}->{metadbengine}; |
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|
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} |
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|
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sub getTargetList { |
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my $self = shift; |
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|
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$self->log( "Reading database of targets (dot) from XML.", 'notice' ); |
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|
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# prepare access to metadata (assure instantiated storage handle) |
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my $mdbe = $self->accessMetadata(); |
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|
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$mdbe->sendQuery("*/target"); |
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$mdbe->circumflex('result'); |
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|
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# checks |
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if ($mdbe->isEmpty) { |
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$self->log("XML metadata was empty.", 'critical'); |
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return; |
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} |
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|
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# trace |
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#print Dumper($self->{buffer}); |
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#exit; |
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|
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# behaviour |
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#$self->xml2simplehash(); |
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my $tree = $mdbe->toEasyTree(); |
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#return $result; |
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|
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# trace |
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#print Dumper($tree); |
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#exit; |
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|
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# build result |
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my @targets; |
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foreach my $entry (@{$tree->{content}}) { |
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my $description = $entry->{content}->[0]->{content}->[0]->{content}; |
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push @targets, { name => $entry->{attrib}->{name}, description => $description }; |
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} |
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|
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return \@targets; |
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|
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} |
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|
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|
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sub getTargetDetails { |
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my $self = shift; |
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my $target = shift; |
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my $options = shift; |
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|
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# check cache and return result from there |
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if (my $result = $self->{cache}->{targets}->{$target} and not $options->{force}) { |
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return $result; |
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} |
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|
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# get metadata for single task from storage |
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my $mdbe = $self->accessMetadata(); |
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$mdbe->sendQuery("*/target[\@name=\"$target\"]"); |
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|
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# FIXME: this is wrong behaviour! upper statement should return a proper |
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# result, which itself (already) has the method 'isEmpty' or similar... |
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if ($mdbe->isEmpty()) { |
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$self->log( "Target '$target' not found.", 'notice' ); |
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return; |
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} |
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|
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my $tree = $mdbe->toEasyTree(); |
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|
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# trace |
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#print Dumper($tree); |
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#exit; |
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|
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return $tree; |
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} |
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|
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sub indexTargets { |
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my $self = shift; |
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my $options = shift; |
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|
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# determine filename for cache-file |
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my $filename = 'rap.xml.cache'; |
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if (my $rapfile = $self->{__rap}->{filename}) { |
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if (my $path = dirname($rapfile)) { |
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$filename = $path . '/' . $filename; |
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} |
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} |
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|
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if ($options->{build}) { |
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$self->log("Building index of Targets", 'notice'); |
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# clear cache |
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delete $self->{cache}->{targets}; |
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my $list = $self->getTargetList(); |
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foreach my $target (@$list) { |
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$self->log("Reading target: $target->{name}", 'info'); |
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my $details = $self->getTargetDetails($target->{name}, { force => 1 }); |
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$self->{cache}->{targets}->{$target->{name}} = $details; |
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} |
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store $self->{cache}->{targets}, $filename; |
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|
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} elsif ($options->{load}) { |
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if (not -e $filename) { |
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return; |
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} |
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if ($self->{cache}->{targets} = retrieve($filename)) { |
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return 1; |
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} |
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|
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} else { |
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$self->log("Please call with options build or load", 'warning'); |
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|
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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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