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package XAS::Lib::XML; |
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our $VERSION = '0.01'; |
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use Try::Tiny; |
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use XML::LibXML; |
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use XML::LibXML::XPathContext; |
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use XAS::Class |
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debug => 0, |
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version => $VERSION, |
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base => 'XAS::Base', |
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import => 'class', |
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accessors => 'parser schema doc xpc', |
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utils => ':validation dotid compress', |
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constants => 'TRUE FALSE', |
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vars => { |
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PARAMS => { |
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-xsd => { optional => 1, default => undef }, |
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-default_namespace => { optional => 1, default => 'def' }, |
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}, |
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XMLERR => '', |
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} |
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; |
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# ---------------------------------------------------------------------- |
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# Public Methods |
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# ---------------------------------------------------------------------- |
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sub get_items { |
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my $self = shift; |
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my ($xpath) = validate_params(\@_, [1]); |
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my @nodes; |
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my $xpc = $self->xpc; |
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my $node = $self->doc->documentElement(); |
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if (my ($key) = $xpc->findnodes($xpath, $node)) { |
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if ($key->hasChildNodes()) { |
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@nodes = $key->childNodes(); |
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} |
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} |
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return wantarray ? @nodes : \@nodes; |
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} |
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sub get_item { |
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my $self = shift; |
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my ($xpath) = validate_params(\@_, [1]); |
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56
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my $value = ''; |
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my $xpc = $self->xpc; |
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my $node = $self->doc->documentElement(); |
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if (my ($key) = $xpc->findnodes($xpath, $node)) { |
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$value = $key->textContent(); |
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64
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} |
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66
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return $value; |
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68
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} |
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70
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sub get_node { |
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my $self = shift; |
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my ($xpath) = validate_params(\@_, [1]); |
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74
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my $xpc = $self->xpc; |
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my $node = $self->doc->documentElement(); |
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77
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return $xpc->findnodes($xpath, $node); |
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79
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} |
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81
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sub is_valid { |
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my $self = shift; |
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84
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my $doc = $self->doc; |
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86
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return TRUE unless (defined($self->{'schema'})); |
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88
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try { |
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90
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$self->schema->validate($doc); # validate the document |
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92
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} catch { |
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my $ex = $_; |
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96
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$self->class->var('XMLERR', $ex); |
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98
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$self->throw_msg( |
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dotid($self->class) . '.is_valid', |
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'xml_validate', |
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); |
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103
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}; |
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105
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return TRUE; |
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107
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} |
108
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109
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sub load { |
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my $self = shift; |
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my ($xml) = validate_params(\@_, [1]); |
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113
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try { |
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115
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# load and parse the document |
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117
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$self->{'doc'} = $self->parser->load_xml(string => $xml, {no_blanks => 1}); |
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119
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# find and register all namespaces |
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121
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$self->_load_namespace(); |
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123
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} catch { |
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125
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my $ex = $_; |
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127
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$self->throw_msg( |
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dotid($self->class). '.parser', |
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'xml_parser', |
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$ex |
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); |
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133
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}; |
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135
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} |
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137
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sub xmlerr { |
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my $class = shift; |
139
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my ($value) = validate_params(\@_, [ |
140
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{ optional => 1, default => undef } |
141
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]); |
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143
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if (defined($value)) { |
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145
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class->var('XMLERR', $value); |
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147
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} |
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149
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return class->var('XMLERR'); |
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151
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} |
152
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153
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# ---------------------------------------------------------------------- |
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# Private Methods |
155
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# ---------------------------------------------------------------------- |
156
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157
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sub init { |
158
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my $class = shift; |
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160
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my $self = $class->SUPER::init(@_); |
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162
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$self->{'parser'} = XML::LibXML->new(); |
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$self->{'xpc'} = XML::LibXML::XPathContext->new(); |
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165
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if (defined($self->{'xsd'})) { |
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167
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$self->{'schema'} = XML::LibXML::Schema->new(location => $self->xsd); |
168
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169
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} |
170
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171
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return $self; |
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173
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} |
174
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175
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sub _load_namespace { |
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my $self = shift; |
177
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178
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my $hash; |
179
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my $doc = $self->doc; |
180
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my $def = $self->default_namespace; |
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182
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foreach my $node ($doc->findnodes('//*/namespace::*')) { |
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184
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my $ns = $node->getLocalName() || $def; |
185
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my $uri = $node->getValue(); |
186
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187
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$hash->{$ns} = $uri; # filter multiple namespaces |
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189
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} |
190
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191
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while (my ($key, $value) = each(%$hash)) { |
192
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193
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$self->xpc->registerNs($key, $value); |
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195
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} |
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197
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} |
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199
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1; |
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201
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__END__ |
202
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203
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=head1 NAME |
204
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205
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XAS::Lib::XML - A class to manipulate XML documents |
206
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207
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=head1 SYNOPSIS |
208
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209
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use XAS::Lib::XML; |
210
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211
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my $xpath; |
212
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my $buffer = <STDIN>; |
213
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my $filename = 'schemna.xsd', |
214
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215
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my $xml = XAS::Lib::XML->new( |
216
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-xsd => $filename, |
217
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); |
218
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219
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$xml->load($buffer); |
220
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if ($xml->is_valid) { |
221
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222
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$xpath = '//sif:SIF_Header/sif:SIF_SourceId'; |
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printf("value: %s\n", $xml->get_item($xpath)); |
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225
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} |
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227
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=head1 DESCRIPTION |
228
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229
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This module is able to load, parse and validate a xml document. |
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231
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=head1 METHODS |
232
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233
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=head2 new |
234
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235
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This method initialize the module and takes these parameters: |
236
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237
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=over 4 |
238
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239
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=item B<-xsd> |
240
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241
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The XML Schema to validate against. |
242
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243
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=item B<-default_namespace> |
244
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245
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The default namespace to use, defaults to 'def'. |
246
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247
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=back |
248
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249
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=head2 load($xml) |
250
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251
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This method loads and parses a XML document. |
252
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253
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=over 4 |
254
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255
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=item B<$xml> |
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The XML to load. |
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=back |
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=head2 is_valid |
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This method validates the document to the XSD. If valid returns TRUE, |
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otherwise throws an exception. |
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=head2 get_item($xpath) |
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This method will return the string valuse of the Xpath. |
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=over 4 |
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=item B<$xpath> |
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The Xpath string. |
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=back |
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=head2 get_items($xpath) |
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This method will return an array of nodes for the given Xpath. |
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=over 4 |
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=item B<$xpath> |
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The Xpath string. |
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=back |
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=head2 get_node($xpath) |
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This method will return the node associated with the xpath. |
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294
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=over 4 |
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=item B<$xpath> |
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298
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The Xpath string. |
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300
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=back |
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302
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=head2 xmlerr |
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304
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A class method to return the full XML error string. |
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=head1 SEE ALSO |
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308
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=over 4 |
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310
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=item L<XAS|XAS> |
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=item L<XML::LibXML|XML::LibXML> |
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314
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=back |
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316
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=head1 AUTHOR |
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Kevin L. Esteb, E<lt>kevin@kesteb.usE<gt> |
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320
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=head1 COPYRIGHT AND LICENSE |
321
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322
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Copyright (C) 2014 Kevin L. Esteb |
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This is free software; you can redistribute it and/or modify it under |
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the terms of the Artistic License 2.0. For details, see the full text |
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of the license at http://www.perlfoundation.org/artistic_license_2_0. |
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328
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=cut |