| 1 |
## ---------------------------------------------------------------------- |
| 2 |
## $Id: Metadata.pm,v 1.3 2003/03/29 07:13:19 joko Exp $ |
| 3 |
## ---------------------------------------------------------------------- |
| 4 |
## $Log: Metadata.pm,v $ |
| 5 |
## Revision 1.3 2003/03/29 07:13:19 joko |
| 6 |
## better exception handling if target was not found in xml |
| 7 |
## |
| 8 |
## Revision 1.2 2003/02/20 20:04:35 joko |
| 9 |
## renamed methods |
| 10 |
## - refactored xml-specific code to Data::Storage::Handler::XML |
| 11 |
## |
| 12 |
## Revision 1.1 2003/02/18 15:35:49 joko |
| 13 |
## + initial commit |
| 14 |
## |
| 15 |
## ---------------------------------------------------------------------- |
| 16 |
|
| 17 |
|
| 18 |
package Data::Rap::Metadata; |
| 19 |
|
| 20 |
use strict; |
| 21 |
use warnings; |
| 22 |
|
| 23 |
|
| 24 |
use Data::Dumper; |
| 25 |
use DesignPattern::Object; |
| 26 |
use Storable; |
| 27 |
|
| 28 |
|
| 29 |
sub accessMetadata { |
| 30 |
my $self = shift; |
| 31 |
|
| 32 |
# create instance of storage object once |
| 33 |
if (!$self->{__rap}->{metadbengine}) { |
| 34 |
$self->{__rap}->{metadbengine} = |
| 35 |
DesignPattern::Object->fromPackage('Data::Storage::Handler::XML', filename => $self->{__rap}->{filename} ); |
| 36 |
} |
| 37 |
|
| 38 |
return $self->{__rap}->{metadbengine}; |
| 39 |
|
| 40 |
} |
| 41 |
|
| 42 |
sub getTargetList { |
| 43 |
my $self = shift; |
| 44 |
|
| 45 |
$self->log( "Reading database of targets (dot) from XML.", 'notice' ); |
| 46 |
|
| 47 |
# prepare access to metadata (assure instantiated storage handle) |
| 48 |
my $mdbe = $self->accessMetadata(); |
| 49 |
|
| 50 |
$mdbe->sendQuery("*/target"); |
| 51 |
$mdbe->circumflex('result'); |
| 52 |
|
| 53 |
# checks |
| 54 |
if ($mdbe->isEmpty) { |
| 55 |
$self->log("XML metadata was empty.", 'critical'); |
| 56 |
return; |
| 57 |
} |
| 58 |
|
| 59 |
# trace |
| 60 |
#print Dumper($self->{buffer}); |
| 61 |
#exit; |
| 62 |
|
| 63 |
# behaviour |
| 64 |
#$self->xml2simplehash(); |
| 65 |
my $tree = $mdbe->toEasyTree(); |
| 66 |
#return $result; |
| 67 |
|
| 68 |
# trace |
| 69 |
#print Dumper($tree); |
| 70 |
#exit; |
| 71 |
|
| 72 |
# build result |
| 73 |
my @targets; |
| 74 |
foreach my $entry (@{$tree->{content}}) { |
| 75 |
my $description = $entry->{content}->[0]->{content}->[0]->{content}; |
| 76 |
push @targets, { name => $entry->{attrib}->{name}, description => $description }; |
| 77 |
} |
| 78 |
|
| 79 |
return \@targets; |
| 80 |
|
| 81 |
} |
| 82 |
|
| 83 |
|
| 84 |
sub getTargetDetails { |
| 85 |
my $self = shift; |
| 86 |
my $target = shift; |
| 87 |
my $options = shift; |
| 88 |
|
| 89 |
# check cache and return result from there |
| 90 |
if (my $result = $self->{cache}->{targets}->{$target} and not $options->{force}) { |
| 91 |
return $result; |
| 92 |
} |
| 93 |
|
| 94 |
# get metadata for single task from storage |
| 95 |
my $mdbe = $self->accessMetadata(); |
| 96 |
$mdbe->sendQuery("*/target[\@name=\"$target\"]"); |
| 97 |
|
| 98 |
# FIXME: this is wrong behaviour! upper statement should return a proper |
| 99 |
# result, which itself (already) has the method 'isEmpty' or similar... |
| 100 |
if ($mdbe->isEmpty()) { |
| 101 |
$self->log( "Target '$target' not found.", 'notice' ); |
| 102 |
return; |
| 103 |
} |
| 104 |
|
| 105 |
my $tree = $mdbe->toEasyTree(); |
| 106 |
|
| 107 |
# trace |
| 108 |
#print Dumper($tree); |
| 109 |
#exit; |
| 110 |
|
| 111 |
return $tree; |
| 112 |
} |
| 113 |
|
| 114 |
sub indexTargets { |
| 115 |
my $self = shift; |
| 116 |
my $options = shift; |
| 117 |
|
| 118 |
my $filename = 'rap.xml.cache'; |
| 119 |
|
| 120 |
if ($options->{build}) { |
| 121 |
$self->log("Building index of Targets", 'notice'); |
| 122 |
# clear cache |
| 123 |
delete $self->{cache}->{targets}; |
| 124 |
my $list = $self->getTargetList(); |
| 125 |
foreach my $target (@$list) { |
| 126 |
$self->log("Reading target: $target->{name}", 'info'); |
| 127 |
my $details = $self->getTargetDetails($target->{name}, { force => 1 }); |
| 128 |
$self->{cache}->{targets}->{$target->{name}} = $details; |
| 129 |
} |
| 130 |
store $self->{cache}->{targets}, $filename; |
| 131 |
|
| 132 |
} elsif ($options->{load}) { |
| 133 |
if (not -e $filename) { |
| 134 |
return; |
| 135 |
} |
| 136 |
if ($self->{cache}->{targets} = retrieve($filename)) { |
| 137 |
return 1; |
| 138 |
} |
| 139 |
|
| 140 |
} else { |
| 141 |
$self->log("Please call with options build or load", 'warning'); |
| 142 |
|
| 143 |
} |
| 144 |
} |
| 145 |
|
| 146 |
1; |
| 147 |
__END__ |
Parent Directory
| 
Revision Log
