1 | /**
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2 | *############################################################################
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3 | * A component of the Greenstone Librarian Interface, part of the Greenstone
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4 | * digital library suite from the New Zealand Digital Library Project at the
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5 | * University of Waikato, New Zealand.
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6 | *
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7 | * Author: Michael Dewsnip, NZDL Project, University of Waikato, NZ
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8 | *
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9 | * Copyright (C) 2004 New Zealand Digital Library Project
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10 | *
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11 | * This program is free software; you can redistribute it and/or modify
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12 | * it under the terms of the GNU General Public License as published by
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13 | * the Free Software Foundation; either version 2 of the License, or
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14 | * (at your option) any later version.
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15 | *
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16 | * This program is distributed in the hope that it will be useful,
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17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 | * GNU General Public License for more details.
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20 | *
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21 | * You should have received a copy of the GNU General Public License
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22 | * along with this program; if not, write to the Free Software
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23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 | *############################################################################
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25 | */
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26 |
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27 | package org.greenstone.gatherer.metadata;
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28 |
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29 |
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30 | import java.io.*;
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31 | import java.util.*;
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32 | import java.net.URLDecoder;
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33 | import org.greenstone.gatherer.DebugStream;
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34 | import org.greenstone.gatherer.util.Utility;
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35 |
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36 |
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37 | /** This class represents one doc.xml file */
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38 |
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39 | public abstract class DocXMLFile extends File
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40 | {
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41 | protected HashMap source_file_name_to_description_elements_mapping = new HashMap();
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42 |
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43 | protected final String MetadataWrap;
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44 | protected final String MetadataItem;
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45 |
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46 | public DocXMLFile(String doc_xml_file_path, String metaWrap, String metaItem)
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47 | {
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48 | super(doc_xml_file_path);
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49 | this.MetadataWrap = metaWrap;
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50 | this.MetadataItem = metaItem;
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51 | }
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52 |
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53 |
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54 | public ArrayList getMetadataExtractedFromFile(File file)
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55 | {
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56 | // Build up a list of metadata extracted from this file
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57 | ArrayList metadata_values = new ArrayList();
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58 |
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59 | String file_relative_path = file.getAbsolutePath();
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60 | int import_index = file_relative_path.indexOf("import");
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61 | if (import_index != -1) {
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62 | file_relative_path = file_relative_path.substring(import_index + "import".length() + 1);
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63 | }
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64 |
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65 | // Check whether this file (i.e. doc.xml or docmets.xml on inheritance) file contains extracted metadata for the specified file
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66 | ArrayList description_elements_list = (ArrayList) source_file_name_to_description_elements_mapping.get(file_relative_path);
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67 | if (description_elements_list == null) {
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68 | // ...it doesn't
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69 | return metadata_values;
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70 | }
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71 |
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72 | MetadataSet extracted_metadata_set = MetadataSetManager.getMetadataSet(MetadataSetManager.EXTRACTED_METADATA_NAMESPACE);
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73 |
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74 | // Parse the file
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75 | DebugStream.println("Applicable file: " + this);
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76 | try {
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77 | BufferedReader buffered_reader = new BufferedReader(new FileReader(this));
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78 |
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79 | int description_element_num = 0;
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80 | int next_description_element_start = ((Integer) description_elements_list.get(description_element_num)).intValue();
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81 | boolean in_relevant_description_element = false;
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82 |
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83 | String line = null;
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84 | for (int line_num = 0; (line = buffered_reader.readLine()) != null; line_num++) {
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85 | // Check if this line contains the start of a relevant "Description" element
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86 | // (mets:xmlData in METS parlance, Description in GreenstoneArchive format)
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87 | if (line_num == next_description_element_start) {
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88 | in_relevant_description_element = true;
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89 | continue;
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90 | }
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91 |
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92 | // If we're not in a relevant Description element we don't care about anything
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93 | if (in_relevant_description_element == false) {
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94 | continue;
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95 | }
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96 |
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97 | // Check if this line contains the end of the relevant Description element
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98 | if (line.indexOf("</"+MetadataWrap+">") != -1) {
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99 | description_element_num++;
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100 | if (description_element_num == description_elements_list.size()) {
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101 | break;
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102 | }
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103 |
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104 | next_description_element_start = ((Integer) description_elements_list.get(description_element_num)).intValue();
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105 | in_relevant_description_element = false;
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106 | continue;
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107 | }
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108 |
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109 | // If this line doesn't contain a complete Metadata element, we're not interested
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110 | if (line.indexOf("<"+MetadataItem+" ") == -1 || line.indexOf("</"+MetadataItem+">") == -1) {
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111 | continue;
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112 | }
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113 |
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114 | // Extract the metadata element name
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115 | int name_index = line.indexOf(" name=\"") + " name=\"".length();
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116 | String metadata_element_name_full = line.substring(name_index, line.indexOf("\"", name_index));
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117 |
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118 | // If the metadata has a namespace it isn't extracted metadata, so we're not interested
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119 | // Actually, if it is ex. then we are interested
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120 | String metadata_set_namespace = MetadataTools.getMetadataSetNamespace(metadata_element_name_full);
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121 |
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122 | if (!metadata_set_namespace.equals("") && !metadata_set_namespace.equals("ex")) {
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123 | continue;
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124 | }
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125 |
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126 | // Extracted metadata!
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127 | // do it like this just in case we have ex.
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128 | String metadata_element_name = MetadataTools.getMetadataElementName(metadata_element_name_full);
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129 |
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130 | // We completely ignore bibliographic data
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131 | if (metadata_element_name.equals("SourceSegment")) {
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132 | buffered_reader.close();
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133 | return new ArrayList();
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134 | }
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135 |
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136 | // Ignore metadata starting with gsdl (used to be lowercase metadata and /metadata)
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137 | if (metadata_element_name.startsWith("gsdl")) {
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138 | continue;
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139 | }
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140 |
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141 | MetadataElement metadata_element = extracted_metadata_set.getMetadataElementWithName(metadata_element_name);
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142 |
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143 | // Value trees are not stored for extracted metadata, so create a new value tree node now
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144 | int value_index = line.indexOf(">", name_index) + ">".length();
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145 | String metadata_element_value = line.substring(value_index, line.lastIndexOf("</"+MetadataItem+">"));
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146 |
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147 | metadata_element.addMetadataValue(metadata_element_value);
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148 | MetadataValueTreeNode metadata_value_tree_node = metadata_element.getMetadataValueTreeNode(metadata_element_value);
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149 |
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150 | // Add the new metadata value to the list
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151 | MetadataValue metadata_value = new MetadataValue(metadata_element, metadata_value_tree_node);
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152 | metadata_values.add(metadata_value);
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153 | }
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154 |
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155 | buffered_reader.close();
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156 | }
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157 | catch (FileNotFoundException exception) {
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158 | DebugStream.printStackTrace(exception);
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159 | }
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160 | catch (IOException exception) {
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161 | DebugStream.printStackTrace(exception);
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162 | }
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163 |
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164 | return metadata_values;
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165 | }
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166 |
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167 |
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168 |
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169 |
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170 | /**
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171 | * Every file must be skimmed when a collection is opened, for two reasons:
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172 | * - To build a mapping from source file to its corresponding doc.xml file
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173 | * - To get a complete list of all extracted metadata elements
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174 | */
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175 | public void skimFile()
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176 | {
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177 | MetadataSet extracted_metadata_set = MetadataSetManager.getMetadataSet(MetadataSetManager.EXTRACTED_METADATA_NAMESPACE);
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178 |
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179 | // Skim the file as quickly as possible (don't parse as XML), looking at the Metadata elements
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180 | DebugStream.println("Skimming " + this + "...");
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181 | try {
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182 | BufferedReader buffered_reader = new BufferedReader(new FileReader(this));
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183 | int description_element_start = -1;
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184 |
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185 | String line = null;
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186 | for (int line_num = 0; (line = buffered_reader.readLine()) != null; line_num++) {
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187 | // This line contains the start of a "MetadataWrap" element
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188 | // (mets:xmlData in METS parlance, Description in GreenstoneArchive format)
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189 | if (line.indexOf("<"+MetadataWrap+">") != -1) {
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190 | if (description_element_start != -1) {
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191 | System.err.println("Parse error: previous " + MetadataWrap + " element unfinished!");
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192 | }
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193 | description_element_start = line_num;
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194 | continue;
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195 | }
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196 |
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197 | // This line contains the end of a "MetadataWrap" element
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198 | if (line.indexOf("</"+MetadataWrap+">") != -1) {
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199 | if (description_element_start == -1) {
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200 | System.err.println("Parse error: "+MetadataWrap+" element unstarted!");
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201 | }
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202 | description_element_start = -1;
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203 | continue;
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204 | }
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205 |
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206 | // If we're not in a"MetadataWrap" element there shouldn't be any Metadata elements
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207 | if (description_element_start == -1) {
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208 | continue;
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209 | }
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210 |
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211 | // This line doesn't contain a Metadata element, so we're not interested
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212 | if (line.indexOf("<"+MetadataItem+" ") == -1) {
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213 | DebugStream.println("Warning: "+MetadataWrap+" element line doesn't contain Metadata element.");
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214 | continue;
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215 | }
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216 |
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217 | // Extract the metadata element name
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218 | int name_index = line.indexOf(" name=\"") + " name=\"".length();
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219 | String metadata_element_name_full = line.substring(name_index, line.indexOf("\"", name_index));
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220 |
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221 | // If the metadata has a namespace it isn't extracted metadata, so we're not interested
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222 | String metadata_set_namespace = MetadataTools.getMetadataSetNamespace(metadata_element_name_full);
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223 | if (!metadata_set_namespace.equals("") && !metadata_set_namespace.equals("ex")) {
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224 | continue;
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225 | }
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226 |
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227 | // Extracted metadata! May have ex. so make sure we remove that
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228 | String metadata_element_name = MetadataTools.getMetadataElementName(metadata_element_name_full);
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229 | // Note which file this is for
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230 | if (metadata_element_name.equals("gsdlsourcefilename")) {
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231 | // Extract the gsdlsourcefilename element value
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232 | int value_index = line.indexOf(">", name_index) + ">".length();
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233 | String gsdlsourcefilename_value = line.substring(value_index, line.indexOf("<", value_index));
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234 |
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235 | // We're only interested in the path relative to the import folder
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236 | int import_index = gsdlsourcefilename_value.indexOf("import");
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237 | if (import_index != -1) {
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238 | gsdlsourcefilename_value = gsdlsourcefilename_value.substring(import_index + "import".length());
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239 |
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240 | boolean is_unix_path = gsdlsourcefilename_value.startsWith("/");
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241 | gsdlsourcefilename_value = gsdlsourcefilename_value.substring(1);
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242 |
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243 | // URL decode gsdlsourcefilename. Need to set the decoder to use the default system encoding
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244 | // This is stored in the System's file.encoding property.
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245 | gsdlsourcefilename_value = URLDecoder.decode(gsdlsourcefilename_value, System.getProperty("file.encoding"));
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246 |
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247 | // Make sure the path matches the OS that is running
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248 | if (is_unix_path && Utility.isWindows()) {
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249 | // Convert path from Unix to Windows
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250 | gsdlsourcefilename_value = gsdlsourcefilename_value.replaceAll("\\/", "\\\\");
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251 | }
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252 | else if (!is_unix_path && !Utility.isWindows()) {
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253 | // Convert path from Windows to Unix
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254 | gsdlsourcefilename_value = gsdlsourcefilename_value.replaceAll("\\\\", "/");
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255 | }
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256 |
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257 | // Remember this for quick access later
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258 | if (source_file_name_to_description_elements_mapping.get(gsdlsourcefilename_value) == null) {
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259 | source_file_name_to_description_elements_mapping.put(gsdlsourcefilename_value, new ArrayList());
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260 | }
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261 |
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262 | ((ArrayList) source_file_name_to_description_elements_mapping.get(gsdlsourcefilename_value)).add(new Integer(description_element_start));
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263 | }
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264 |
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265 | // Warn about an odd gsdlsourcefilename, except if it is the Greenstone "tmp" directory or
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266 | // (as in the case of using FLI) if it is the etc/collect.cfg or etc/collectionConfig.xml file
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267 | // which are the gsdlsourcefilenames for the fedora digital object representing a collection.
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268 | // This (tmp dir) is true when the source files come from a zip file processed by ZIPPlug, for example
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269 | else if (gsdlsourcefilename_value.indexOf("tmp") == -1
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270 | && !gsdlsourcefilename_value.endsWith("collect.cfg")
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271 | && !gsdlsourcefilename_value.endsWith("collectionConfig.xml")) {
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272 | // We don't really know what is going on...
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273 | System.err.println("Warning: Could not understand gsdlsourcefilename " + gsdlsourcefilename_value);
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274 | }
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275 | }
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276 |
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277 | // Ignore metadata starting with gsdl (used to be lowercase metadata and /metadata)
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278 | if (metadata_element_name.startsWith("gsdl")) {
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279 | continue;
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280 | }
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281 |
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282 | MetadataElement metadata_element = extracted_metadata_set.getMetadataElementWithName(metadata_element_name);
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283 | if (metadata_element == null) {
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284 | // This element isn't defined in ex.mds, so create it for this session
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285 | DebugStream.println("Extracted metadata element not defined: " + metadata_element_name);
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286 | extracted_metadata_set.addMetadataElementForThisSession(metadata_element_name);
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287 | }
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288 | }
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289 |
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290 | buffered_reader.close();
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291 | }
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292 | catch (FileNotFoundException exception) {
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293 | DebugStream.printStackTrace(exception);
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294 | }
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295 | catch (IOException exception) {
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296 | DebugStream.printStackTrace(exception);
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297 | }
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298 | }
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299 |
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300 |
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301 | /*
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302 | public ArrayList getMetadataExtractedFromFile(File file)
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303 | {
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304 | // Build up a list of metadata extracted from this file
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305 | ArrayList metadata_values = new ArrayList();
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306 |
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307 | String file_relative_path = file.getAbsolutePath();
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308 | int import_index = file_relative_path.indexOf("import");
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309 | if (import_index != -1) {
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310 | file_relative_path = file_relative_path.substring(import_index + "import".length() + 1);
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311 | }
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312 |
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313 | // Check whether this doc.xml file contains extracted metadata for the specified file
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314 | ArrayList description_elements_list = (ArrayList) source_file_name_to_description_elements_mapping.get(file_relative_path);
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315 | if (description_elements_list == null) {
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316 | // ...it doesn't
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317 | return metadata_values;
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318 | }
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319 |
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320 | MetadataSet extracted_metadata_set = MetadataSetManager.getMetadataSet(MetadataSetManager.EXTRACTED_METADATA_NAMESPACE);
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321 |
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322 | // Parse the doc.xml file
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323 | DebugStream.println("Applicable doc.xml file: " + this);
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324 | try {
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325 | BufferedReader buffered_reader = new BufferedReader(new FileReader(this));
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326 |
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327 | int description_element_num = 0;
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328 | int next_description_element_start = ((Integer) description_elements_list.get(description_element_num)).intValue();
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329 | boolean in_relevant_description_element = false;
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330 |
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331 | String line = null;
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332 | for (int line_num = 0; (line = buffered_reader.readLine()) != null; line_num++) {
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333 | // Check if this line contains the start of a relevant Description element
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334 | if (line_num == next_description_element_start) {
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335 | in_relevant_description_element = true;
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336 | continue;
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337 | }
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338 |
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339 | // If we're not in a relevant Description element we don't care about anything
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340 | if (in_relevant_description_element == false) {
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341 | continue;
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342 | }
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343 |
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344 | // Check if this line contains the end of the relevant Description element
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345 | if (line.indexOf("</Description>") != -1) {
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346 | description_element_num++;
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347 | if (description_element_num == description_elements_list.size()) {
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348 | break;
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349 | }
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350 |
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351 | next_description_element_start = ((Integer) description_elements_list.get(description_element_num)).intValue();
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352 | in_relevant_description_element = false;
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353 | continue;
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354 | }
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355 |
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356 | // If this line doesn't contain a complete Metadata element, we're not interested
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357 | if (line.indexOf("<Metadata ") == -1 || line.indexOf("</Metadata>") == -1) {
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358 | continue;
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359 | }
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360 |
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361 | // Extract the metadata element name
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362 | int name_index = line.indexOf(" name=\"") + " name=\"".length();
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363 | String metadata_element_name_full = line.substring(name_index, line.indexOf("\"", name_index));
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364 |
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365 | // If the metadata has a namespace it isn't extracted metadata, so we're not interested
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366 | String metadata_set_namespace = MetadataTools.getMetadataSetNamespace(metadata_element_name_full);
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367 | if (!metadata_set_namespace.equals("")) {
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368 | continue;
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369 | }
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370 |
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371 | // Extracted metadata!
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372 | String metadata_element_name = metadata_element_name_full;
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373 |
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374 | // We completely ignore bibliographic data
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375 | if (metadata_element_name.equals("SourceSegment")) {
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376 | buffered_reader.close();
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377 | return new ArrayList();
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378 | }
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379 |
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380 | // Ignore metadata starting with gsdl (used to be lowercase metadata and /metadata)
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381 | if (metadata_element_name.startsWith("gsdl")) {
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382 | continue;
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383 | }
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384 |
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385 | MetadataElement metadata_element = extracted_metadata_set.getMetadataElementWithName(metadata_element_name);
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386 |
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387 | // Value trees are not stored for extracted metadata, so create a new value tree node now
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388 | int value_index = line.indexOf(">", name_index) + ">".length();
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389 | String metadata_element_value = line.substring(value_index, line.lastIndexOf("</Metadata>"));
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390 |
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391 | metadata_element.addMetadataValue(metadata_element_value);
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392 | MetadataValueTreeNode metadata_value_tree_node = metadata_element.getMetadataValueTreeNode(metadata_element_value);
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393 |
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394 | // Add the new metadata value to the list
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395 | MetadataValue metadata_value = new MetadataValue(metadata_element, metadata_value_tree_node);
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396 | metadata_values.add(metadata_value);
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397 | }
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398 |
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399 | buffered_reader.close();
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400 | }
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401 | catch (FileNotFoundException exception) {
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402 | DebugStream.printStackTrace(exception);
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403 | }
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404 | catch (IOException exception) {
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405 | DebugStream.printStackTrace(exception);
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406 | }
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407 |
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408 | return metadata_values;
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409 | }
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410 |
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411 | */
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412 |
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413 | /**
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414 | * Every doc.xml file must be skimmed when a collection is opened, for two reasons:
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415 | * - To build a mapping from source file to its corresponding doc.xml file
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416 | * - To get a complete list of all extracted metadata elements
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417 | */
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418 | /*
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419 | public void skimFile()
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420 | {
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421 | MetadataSet extracted_metadata_set = MetadataSetManager.getMetadataSet(MetadataSetManager.EXTRACTED_METADATA_NAMESPACE);
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422 |
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423 | // Skim the doc.xml file as quickly as possible (don't parse as XML), looking at the Metadata elements
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424 | DebugStream.println("Skimming " + this + "...");
|
---|
425 | try {
|
---|
426 | BufferedReader buffered_reader = new BufferedReader(new FileReader(this));
|
---|
427 | int description_element_start = -1;
|
---|
428 |
|
---|
429 | String line = null;
|
---|
430 | for (int line_num = 0; (line = buffered_reader.readLine()) != null; line_num++) {
|
---|
431 | // This line contains the start of a Description element
|
---|
432 | if (line.indexOf("<Description>") != -1) {
|
---|
433 | if (description_element_start != -1) {
|
---|
434 | System.err.println("Parse error: previous Description element unfinished!");
|
---|
435 | }
|
---|
436 | description_element_start = line_num;
|
---|
437 | continue;
|
---|
438 | }
|
---|
439 |
|
---|
440 | // This line contains the end of a Description element
|
---|
441 | if (line.indexOf("</Description>") != -1) {
|
---|
442 | if (description_element_start == -1) {
|
---|
443 | System.err.println("Parse error: Description element unstarted!");
|
---|
444 | }
|
---|
445 | description_element_start = -1;
|
---|
446 | continue;
|
---|
447 | }
|
---|
448 |
|
---|
449 | // If we're not in a Description element there shouldn't be any Metadata elements
|
---|
450 | if (description_element_start == -1) {
|
---|
451 | continue;
|
---|
452 | }
|
---|
453 |
|
---|
454 | // This line doesn't contain a Metadata element, so we're not interested
|
---|
455 | if (line.indexOf("<Metadata ") == -1) {
|
---|
456 | DebugStream.println("Warning: Description element line doesn't contain Metadata element.");
|
---|
457 | continue;
|
---|
458 | }
|
---|
459 |
|
---|
460 | // Extract the metadata element name
|
---|
461 | int name_index = line.indexOf(" name=\"") + " name=\"".length();
|
---|
462 | String metadata_element_name_full = line.substring(name_index, line.indexOf("\"", name_index));
|
---|
463 |
|
---|
464 | // If the metadata has a namespace it isn't extracted metadata, so we're not interested
|
---|
465 | String metadata_set_namespace = MetadataTools.getMetadataSetNamespace(metadata_element_name_full);
|
---|
466 | if (!metadata_set_namespace.equals("")) {
|
---|
467 | continue;
|
---|
468 | }
|
---|
469 |
|
---|
470 | // Extracted metadata!
|
---|
471 | String metadata_element_name = metadata_element_name_full;
|
---|
472 |
|
---|
473 | // Note which file this doc.xml is for
|
---|
474 | if (metadata_element_name.equals("gsdlsourcefilename")) {
|
---|
475 | // Extract the gsdlsourcefilename element value
|
---|
476 | int value_index = line.indexOf(">", name_index) + ">".length();
|
---|
477 | String gsdlsourcefilename_value = line.substring(value_index, line.indexOf("<", value_index));
|
---|
478 |
|
---|
479 | // We're only interested in the path relative to the import folder
|
---|
480 | int import_index = gsdlsourcefilename_value.indexOf("import");
|
---|
481 | if (import_index != -1) {
|
---|
482 | gsdlsourcefilename_value = gsdlsourcefilename_value.substring(import_index + "import".length());
|
---|
483 |
|
---|
484 | boolean is_unix_path = gsdlsourcefilename_value.startsWith("/");
|
---|
485 | gsdlsourcefilename_value = gsdlsourcefilename_value.substring(1);
|
---|
486 |
|
---|
487 | // URL decode gsdlsourcefilename. Need to set the decoder to use the default system encoding
|
---|
488 | // This is stored in the System's file.encoding property.
|
---|
489 | gsdlsourcefilename_value = URLDecoder.decode(gsdlsourcefilename_value, System.getProperty("file.encoding"));
|
---|
490 |
|
---|
491 | // Make sure the path matches the OS that is running
|
---|
492 | if (is_unix_path && Utility.isWindows()) {
|
---|
493 | // Convert path from Unix to Windows
|
---|
494 | gsdlsourcefilename_value = gsdlsourcefilename_value.replaceAll("\\/", "\\\\");
|
---|
495 | }
|
---|
496 | else if (!is_unix_path && !Utility.isWindows()) {
|
---|
497 | // Convert path from Windows to Unix
|
---|
498 | gsdlsourcefilename_value = gsdlsourcefilename_value.replaceAll("\\\\", "/");
|
---|
499 | }
|
---|
500 |
|
---|
501 | // Remember this for quick access later
|
---|
502 | if (source_file_name_to_description_elements_mapping.get(gsdlsourcefilename_value) == null) {
|
---|
503 | source_file_name_to_description_elements_mapping.put(gsdlsourcefilename_value, new ArrayList());
|
---|
504 | }
|
---|
505 |
|
---|
506 | ((ArrayList) source_file_name_to_description_elements_mapping.get(gsdlsourcefilename_value)).add(new Integer(description_element_start));
|
---|
507 | }
|
---|
508 |
|
---|
509 | // Warn about an odd gsdlsourcefilename, except if it is the Greenstone "tmp" directory
|
---|
510 | // This is true when the source files come from a zip file processed by ZIPPlug, for example
|
---|
511 | else if (gsdlsourcefilename_value.indexOf("tmp") == -1) {
|
---|
512 | // We don't really know what is going on...
|
---|
513 | System.err.println("Warning: Could not understand gsdlsourcefilename " + gsdlsourcefilename_value);
|
---|
514 | }
|
---|
515 | }
|
---|
516 |
|
---|
517 | // Ignore metadata starting with gsdl (used to be lowercase metadata and /metadata)
|
---|
518 | if (metadata_element_name.startsWith("gsdl")) {
|
---|
519 | continue;
|
---|
520 | }
|
---|
521 |
|
---|
522 | MetadataElement metadata_element = extracted_metadata_set.getMetadataElementWithName(metadata_element_name);
|
---|
523 | if (metadata_element == null) {
|
---|
524 | // This element isn't defined in ex.mds, so create it for this session
|
---|
525 | DebugStream.println("Extracted metadata element not defined: " + metadata_element_name);
|
---|
526 | extracted_metadata_set.addMetadataElementForThisSession(metadata_element_name);
|
---|
527 | }
|
---|
528 | }
|
---|
529 |
|
---|
530 | buffered_reader.close();
|
---|
531 | }
|
---|
532 | catch (FileNotFoundException exception) {
|
---|
533 | DebugStream.printStackTrace(exception);
|
---|
534 | }
|
---|
535 | catch (IOException exception) {
|
---|
536 | DebugStream.printStackTrace(exception);
|
---|
537 | }
|
---|
538 | }
|
---|
539 | */
|
---|
540 |
|
---|
541 | }
|
---|