1 | ###########################################################################
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2 | #
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3 | # MARCXMLPlugin.pm
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4 | # A component of the Greenstone digital library software
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5 | # from the New Zealand Digital Library Project at the
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6 | # University of Waikato, New Zealand.
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7 | #
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8 | # Copyright (C) 2001 New Zealand Digital Library Project
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9 | #
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10 | # This program is free software; you can redistribute it and/or modify
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11 | # it under the terms of the GNU General Public License as published by
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12 | # the Free Software Foundation; either version 2 of the License, or
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13 | # (at your option) any later version.
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14 | #
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15 | # This program is distributed in the hope that it will be useful,
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16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | # GNU General Public License for more details.
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19 | #
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20 | # You should have received a copy of the GNU General Public License
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21 | # along with this program; if not, write to the Free Software
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22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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23 | #
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24 | ###########################################################################
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25 |
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26 | # Processes MARCXML documents. Note that this plugin does no
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27 | # syntax checking (though the XML::Parser module tests for
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28 | # well-formedness).
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29 |
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30 | package MARCXMLPlugin;
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31 |
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32 | use ReadXMLFile;
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33 | use ReadTextFile;
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34 | use marcmapping;
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35 |
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36 | use strict;
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37 | no strict 'refs'; # allow filehandles to be variables and viceversa
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38 |
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39 | sub BEGIN {
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40 | @MARCXMLPlugin::ISA = ('ReadXMLFile', 'ReadTextFile');
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41 | }
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42 |
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43 | my $arguments = [{'name' => "metadata_mapping_file",
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44 | 'desc' => "{MARCXMLPlugin.metadata_mapping_file}",
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45 | 'type' => "string",
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46 | 'deft' => "marc2dc.txt",
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47 | 'reqd' => "no" },
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48 | { 'name' => "process_exp",
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49 | 'desc' => "{BasePlugin.process_exp}",
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50 | 'type' => "regexp",
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51 | 'deft' => &get_default_process_exp(),
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52 | 'reqd' => "no" }];
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53 |
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54 | my $options = { 'name' => "MARCXMLPlugin",
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55 | 'desc' => "{MARCXMLPlugin.desc}",
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56 | 'abstract' => "no",
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57 | 'inherits' => "yes",
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58 | 'args' => $arguments
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59 | };
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60 |
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61 |
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62 | sub new {
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63 | my ($class) = shift (@_);
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64 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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65 | push(@$pluginlist, $class);
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66 |
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67 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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68 | push(@{$hashArgOptLists->{"OptList"}},$options);
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69 |
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70 | # we want to be able to use the textcat methods from ReadTextFile
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71 | # to get the language and encoding
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72 | new ReadTextFile($pluginlist, $inputargs, $hashArgOptLists, 1);
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73 |
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74 | my $self = new ReadXMLFile($pluginlist, $inputargs, $hashArgOptLists);
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75 |
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76 | # we want to strip namespaces, so have to create a new XML parser
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77 | my $parser = new XML::Parser('Style' => 'Stream',
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78 | 'Pkg' => 'ReadXMLFile',
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79 | 'PluginObj' => $self,
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80 | 'Namespaces' => 1, # strip out namespaces
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81 | 'Handlers' => {'Char' => \&ReadXMLFile::Char,
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82 | 'XMLDecl' => \&ReadXMLFile::XMLDecl,
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83 | 'Entity' => \&ReadXMLFile::Entity,
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84 | 'Doctype' => \&ReadXMLFile::Doctype,
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85 | 'Default' => \&ReadXMLFile::Default
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86 | });
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87 |
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88 | $self->{'parser'} = $parser;
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89 |
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90 | $self->{'content'} = "";
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91 | $self->{'xmlcontent'} = "";
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92 | $self->{'record_count'} = 1;
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93 | $self->{'language'} = "";
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94 | $self->{'encoding'} = "";
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95 | $self->{'marc_mapping'} = {};
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96 | $self->{'current_code'} = "";
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97 | $self->{'current_tag'} = "";
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98 | $self->{'current_element'} = "";
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99 | $self->{'metadata_mapping'} = undef;
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100 | $self->{'num_processed'} = 0;
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101 | $self->{'indent'} = 0;
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102 |
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103 | return bless $self, $class;
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104 | }
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105 |
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106 |
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107 | sub get_default_process_exp {
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108 | my $self = shift (@_);
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109 |
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110 | return q^(?i)\.xml$^;
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111 | }
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112 |
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113 | sub get_doctype {
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114 | my $self = shift(@_);
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115 |
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116 | return "collection";
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117 | }
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118 |
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119 |
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120 | sub init {
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121 | my $self = shift (@_);
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122 | my ($verbosity, $outhandle, $failhandle) = @_;
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123 |
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124 | ## the mapping file has already been loaded
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125 | if (defined $self->{'metadata_mapping'} ){
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126 | $self->SUPER::init(@_);
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127 | return;
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128 | }
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129 |
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130 | # read in the metadata mapping file
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131 | my $mm_file = &util::locate_config_file($self->{'metadata_mapping_file'});
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132 |
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133 | if (! defined $mm_file)
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134 | {
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135 | my $msg = "MARCXMLPlugin ERROR: Can't locate mapping file \"" .
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136 | $self->{'metadata_mapping_file'} . "\".\n " .
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137 | " No metadata will be extracted from MARCXML files.\n";
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138 |
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139 | print $outhandle $msg;
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140 | print $failhandle $msg;
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141 | $self->{'metadata_mapping'} = undef;
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142 | # We pick up the error in process() if there is no $mm_file
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143 | # If we exit here, then pluginfo.pl will exit too!
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144 | }
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145 | else {
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146 | $self->{'metadata_mapping'} = &marcmapping::parse_marc_metadata_mapping($mm_file, $outhandle);
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147 | }
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148 |
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149 |
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150 | ##map { print STDERR $_."=>".$self->{'metadata_mapping'}->{$_}."\n"; } keys %{$self->{'metadata_mapping'}};
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151 |
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152 | $self->SUPER::init(@_);
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153 | }
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154 |
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155 | # Called for DOCTYPE declarations - use die to bail out if this doctype
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156 | # is not meant for this plugin
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157 | sub xml_doctype {
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158 | my $self = shift(@_);
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159 |
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160 | my ($expat, $name, $sysid, $pubid, $internal) = @_;
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161 | return;
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162 |
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163 | }
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164 |
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165 |
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166 | sub xml_start_document {
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167 | my $self = shift(@_);
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168 |
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169 | my ($expat, $name, $sysid, $pubid, $internal) = @_;
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170 |
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171 |
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172 | my $file = $self->{'file'};
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173 | my $filename = $self->{'filename'};
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174 |
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175 | my ($language, $encoding) = $self->textcat_get_language_encoding ($filename);
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176 |
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177 | $self->{'language'} = $language;
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178 | $self->{'encoding'} = $encoding;
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179 | $self->{'element_count'} = 1;
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180 | $self->{'indent'} = 0;
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181 | my $outhandle = $self->{'outhandle'};
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182 | print $outhandle "MARCXMLPlugin: processing $self->{'file'}\n" if $self->{'verbosity'} > 1;
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183 | print STDERR "<Processing n='$self->{'file'}' p='MARCXMLPlugin'>\n" if $self->{'gli'};
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184 |
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185 | # reset the base id
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186 | $self->{'base_oid'} = undef;
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187 |
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188 | }
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189 |
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190 | sub xml_end_document {
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191 |
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192 | }
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193 |
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194 | sub xml_start_tag {
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195 | my $self = shift;
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196 | my $expat = shift;
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197 | my $element = shift;
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198 |
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199 | my $text = $_;
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200 | my $escaped_text = $self->escape_text($_);
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201 |
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202 | $self->{'current_element'} = $element;
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203 |
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204 | ##get all atributes of this element and store it in a map name=>value
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205 | my %attr_map = ();
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206 | my $attrstring = $_;
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207 | while ($attrstring =~ /(\w+)=\"(\w+)\"/){
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208 | $attr_map{$1}=$2;
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209 | $attrstring = $'; #'
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210 | }
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211 |
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212 |
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213 | my $processor = $self->{'processor'};
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214 |
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215 | ##create a new document for each record
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216 | if ($element eq "record") {
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217 | my $filename = $self->{'filename'};
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218 | my $language = $self->{'language'};
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219 | my $encoding = $self->{'encoding'};
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220 | my $file = $self->{'file'};
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221 | my $doc_obj = new doc($filename, undef, $self->{'file_rename_method'});
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222 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "Language", $language);
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223 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "Encoding", $encoding);
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224 | my ($filemeta) = $file =~ /([^\\\/]+)$/;
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225 | $self->set_Source_metadata($doc_obj, $filemeta, $encoding);
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226 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "SourceSegment", "$self->{'record_count'}");
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227 | if ($self->{'cover_image'}) {
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228 | $self->associate_cover_image($doc_obj, $filename);
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229 | }
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230 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(), "Plugin", "$self->{'plugin_type'}");
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231 | $doc_obj->add_metadata($doc_obj->get_top_section(), "FileFormat", "MARCXML");
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232 |
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233 | my $outhandle = $self->{'outhandle'};
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234 | print $outhandle "Record $self->{'record_count'}\n" if $self->{'verbosity'} > 1;
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235 |
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236 | $self->{'record_count'}++;
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237 | $self->{'doc_obj'} = $doc_obj;
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238 | $self->{'num_processed'}++;
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239 | if (!defined $self->{'base_oid'}) {
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240 | $self->SUPER::add_OID($doc_obj);
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241 | $self->{'base_oid'} = $doc_obj->get_OID();
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242 | }
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243 |
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244 |
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245 | }
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246 |
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247 | ## get the marc code, for example 520
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248 | if ($element eq "datafield") {
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249 | if (defined $attr_map{'tag'} and $attr_map{'tag'} ne ""){
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250 | $self->{'current_tag'} = $attr_map{tag};
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251 | }
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252 | }
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253 |
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254 |
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255 | ## append the subcode to the marc code for example 520a or 520b
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256 | if ($element eq "subfield"){
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257 | if (defined $attr_map{'code'} and $attr_map{'code'} ne "" and $self->{'current_tag'} ne ""){
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258 | $self->{'current_code'} = $attr_map{'code'};
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259 | }
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260 | }
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261 |
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262 | if ($element eq "record"){
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263 | $self->{'indent'} = 0;
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264 | $self->{'content'} = "";
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265 | $self->{'xmlcontent'} = "";
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266 | }
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267 | else {
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268 | if ($element ne "subfield"){
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269 | $self->{'indent'} = 1;
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270 | }
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271 | else{
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272 | $self->{'indent'} = 2;
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273 | }
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274 | }
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275 |
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276 |
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277 | if ($element eq "collection") {
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278 | # remember the full start tag for <collection ...>
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279 | # This is needed to wrap around each <record> when generating its associate MARCXML file
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280 |
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281 | $self->{'xmlcollectiontag'} = $text;
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282 | }
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283 | else {
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284 | $self->{'content'} .= "<br/>" if ($element ne "record");
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285 | $self->{'content'} .= $self->calculate_indent($self->{'indent'}).$escaped_text;
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286 | $self->{'xmlcontent'} .= $text;
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287 | }
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288 |
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289 | }
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290 |
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291 |
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292 |
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293 | sub xml_end_tag {
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294 | my $self = shift(@_);
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295 | my ($expat, $element) = @_;
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296 |
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297 | my $text = $_;
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298 | my $escaped_text = $self->escape_text($_);
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299 |
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300 | if ($element eq "record" and defined $self->{'doc_obj'}) {
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301 | # process the document
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302 | my $processor = $self->{'processor'};
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303 | my $doc_obj = $self->{'doc_obj'};
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304 | $self->{'content'} .= "<br/>".$escaped_text;
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305 | $self->{'xmlcontent'} .= $text;
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306 |
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307 |
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308 | my $top_section = $doc_obj->get_top_section();
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309 |
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310 | my $tmp_marcxml_filename = &util::get_tmp_filename("xml");
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311 | if (open (XMLOUT,">$tmp_marcxml_filename")) {
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312 |
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313 | print XMLOUT "<?xml-stylesheet type=\"text/xsl\" href=\"MARC21slim2English.xsl\"?>\n";
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314 | my $xml_content = $self->{'xmlcontent'};
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315 |
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316 | $xml_content = $self->{'xmlcollectiontag'}.$xml_content."</collection>";
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317 |
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318 | print XMLOUT $xml_content;
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319 |
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320 | close(XMLOUT);
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321 |
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322 | $doc_obj->associate_file($tmp_marcxml_filename,"marcxml.xml","text/xml", $top_section);
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323 |
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324 | # assicate xsl style file for presentation as HTML
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325 | my $xsl_filename = &util::filename_cat($ENV{'GSDLHOME'},"etc","MARC21slim2English.xsl");
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326 | $doc_obj->associate_file($xsl_filename,"MARC21slim2English.xsl","text/xml", $top_section);
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327 |
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328 | }
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329 | else {
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330 | my $outhandle = $self->{'outhandle'};
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331 | print $outhandle "Warning: Unable for write out associated MARCXML file $tmp_marcxml_filename\n";
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332 | }
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333 |
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334 | # include any metadata passed in from previous plugins
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335 | # note that this metadata is associated with the top level section
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336 |
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337 | $self->extra_metadata ($doc_obj,
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338 | $doc_obj->get_top_section(),
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339 | $self->{'metadata'});
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340 |
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341 |
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342 | $self->add_OID($doc_obj, $self->{'base_oid'}, $self->{'record_count'});
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343 |
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344 | $doc_obj->add_utf8_text($doc_obj->get_top_section(),$self->{'content'});
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345 | $processor->process($doc_obj);
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346 |
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347 | ##clean up
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348 | $self->{'content'} = "";
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349 | $self->{'xmlcontent'} = "";
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350 | $self->{'doc_obj'} = undef;
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351 | return;
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352 | }
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353 |
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354 | ## map the xmlmarc to gsdl metadata
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355 | if ($element eq "datafield" and defined $self->{'doc_obj'} and defined $self->{'marc_mapping'} and defined $self->{'metadata_mapping'}){
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356 | my $metadata_mapping = $self->{'metadata_mapping'};
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357 | my $marc_mapping = $self->{'marc_mapping'};
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358 | my $doc_obj = $self->{'doc_obj'};
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359 |
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360 | ##print STDERR "**** Marc Record\n";
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361 | ##map { print STDERR $_."=>".$marc_mapping->{$_}."\n"; } keys %$marc_mapping;
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362 | ##print STDERR "**** Metadata Mapping\n";
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363 | ##map { print STDERR $_."=>".$metadata_mapping->{$_}."\n"; } keys %$metadata_mapping;
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364 |
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365 |
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366 | foreach my $marc_field (keys %$metadata_mapping){
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367 |
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368 | ## test whether this field has subfield
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369 | my $subfield = undef;
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370 | if ($marc_field =~ /(\d\d\d)(?:\$|\^)?(\w)/){
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371 | $marc_field = $1;
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372 | $subfield = $2;
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373 | }
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374 |
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375 | my $matched_field = $marc_mapping->{$marc_field};
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376 |
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377 | if (defined $matched_field) {
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378 |
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379 | my $meta_name = undef;
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380 | my $meta_value = undef;
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381 |
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382 | if (defined $subfield){
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383 | $meta_name = $metadata_mapping->{$marc_field."\$".$subfield};
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384 |
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385 | $meta_value = $matched_field->{$subfield};
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386 |
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387 | if (!defined $meta_value) {
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388 | # record read in does not have the specified subfield
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389 | next;
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390 | }
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391 | }
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392 | else {
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393 | $meta_name = $metadata_mapping->{$marc_field};
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394 |
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395 | # no subfield => get all the values
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396 | my $first = 1;
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397 | foreach my $value (sort keys %{$matched_field}) {
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398 | if ($first) {
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399 | $meta_value = $matched_field->{$value};
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400 | $first = 0;
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401 | } else {
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402 | $meta_value .= " " . $matched_field->{$value};
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403 | }
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404 | }
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405 |
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406 | }
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407 |
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408 | ## escape [ and ]
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409 | $meta_value =~ s/\[/\\\[/g;
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410 | $meta_value =~ s/\]/\\\]/g;
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411 | ##print STDERR "$meta_name=$meta_value\n";
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412 | $doc_obj->add_utf8_metadata($doc_obj->get_top_section(),$meta_name, $meta_value);
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413 |
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414 | }
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415 |
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416 | }
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417 |
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418 | ##clean up
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419 | $self->{'marc_mapping'} = undef;
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420 | $self->{'current_tag'} = "";
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421 | }
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422 |
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423 | if ($element eq "datafield"){
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424 | $self->{'indent'} = 1;
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425 | $self->{'content'} .= "<br/>".$self->calculate_indent($self->{'indent'}).$escaped_text;
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426 | $self->{'xmlcontent'} .= $text;
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427 | }
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428 | else{
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429 | $self->{'content'} .= $escaped_text;
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430 | $self->{'xmlcontent'} .= $text;
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431 | }
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432 |
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433 | }
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434 |
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435 | sub add_OID {
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436 | my $self = shift (@_);
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437 | my ($doc_obj, $id, $record_number) = @_;
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438 |
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439 | my $full_id = $id . "r" . $record_number;
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440 | if ($self->{'OIDtype'} eq "assigned") {
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441 | my $identifier = $doc_obj->get_metadata_element ($doc_obj->get_top_section(), $self->{'OIDmetadata'});
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442 | if (defined $identifier && $identifier ne "") {
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443 | $full_id = $identifier;
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444 | $full_id = &util::tidy_up_oid($full_id);
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445 | }
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446 | }
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447 | $doc_obj->set_OID($full_id);
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448 | }
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449 |
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450 | sub xml_text {
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451 | my $self = shift(@_);
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452 | my ($expat) = @_;
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453 |
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454 | my $text = $_;
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455 | my $escaped_text = $self->escape_text($_);
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456 |
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457 | # protect against & in raw text file
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458 | $text =~ s/&/&/g; # can't have & in raw form, even in 'raw' xml text
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459 |
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460 | ## store the text of a marc code, for exapmle 520a=>A poem about....
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461 | if ($self->{'current_element'} eq "subfield" and $self->{'current_code'} ne "" and $_ ne "" ){
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462 | ##stored it in the marc_mapping
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463 |
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464 | my $current_tag = $self->{'current_tag'};
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465 | my $current_code = $self->{'current_code'};
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466 |
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467 | $self->{'marc_mapping'}->{$current_tag}->{$current_code} .= $_;
|
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468 |
|
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469 | $self->{'current_code'} = "";
|
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470 | }
|
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471 |
|
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472 | $self->{'content'} .= $escaped_text;
|
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473 | $self->{'xmlcontent'} .= $text;
|
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474 |
|
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475 | }
|
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476 |
|
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477 | sub calculate_indent{
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478 | my ($self,$num) = @_;
|
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479 |
|
---|
480 | my $indent ="";
|
---|
481 |
|
---|
482 | for (my $i=0; $i<$num;$i++){
|
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483 | $indent .= " ";
|
---|
484 | }
|
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485 |
|
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486 | return $indent;
|
---|
487 |
|
---|
488 | }
|
---|
489 |
|
---|
490 | sub escape_text {
|
---|
491 | my ($self,$text) = @_;
|
---|
492 | # special characters in the xml encoding
|
---|
493 | $text =~ s/&/&/g; # this has to be first...
|
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494 | $text =~ s/</</g;
|
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495 | $text =~ s/>/>/g;
|
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496 | $text =~ s/\"/"/g;
|
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497 |
|
---|
498 | return $text;
|
---|
499 | }
|
---|
500 |
|
---|
501 |
|
---|
502 | sub unescape_text {
|
---|
503 | my ($self,$text) = @_;
|
---|
504 | # special characters in the xml encoding
|
---|
505 | $text =~ s/</</g;
|
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506 | $text =~ s/>/>/g;
|
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507 | $text =~ s/"/\"/g;
|
---|
508 |
|
---|
509 | $text =~ s/&/&/g; # can't have & in raw form, even in unescaped xml!
|
---|
510 |
|
---|
511 | return $text;
|
---|
512 | }
|
---|
513 |
|
---|
514 |
|
---|
515 | 1;
|
---|
516 |
|
---|
517 |
|
---|