1 | package org.greenstone.gatherer.metadata;
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2 |
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3 |
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4 | import java.io.*;
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5 | import java.util.*;
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6 | import org.greenstone.gatherer.file.FileNode;
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7 | import org.greenstone.gatherer.util.Utility;
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8 | import org.greenstone.gatherer.util.XMLTools;
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9 |
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10 |
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11 | /** This class is a static class that manages the metadata.xml files */
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12 | public class MetadataXMLFileManager
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13 | {
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14 | static private ArrayList metadata_xml_files = new ArrayList();
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15 |
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16 |
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17 | static public void addMetadata(FileNode file_node, MetadataValue metadata_value)
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18 | {
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19 | FileNode[] file_nodes = new FileNode[1];
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20 | file_nodes[0] = file_node;
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21 | addMetadata(file_nodes, metadata_value);
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22 | }
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23 |
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24 |
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25 | static public void addMetadata(FileNode[] file_nodes, MetadataValue metadata_value)
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26 | {
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27 | // Add the metadata to each file node in turn
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28 | for (int i = 0; i < file_nodes.length; i++) {
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29 | File current_file = file_nodes[i].getFile();
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30 | System.err.println("Adding metadata to " + current_file.getAbsolutePath());
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31 |
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32 | // Find which metadata.xml file needs editing
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33 | boolean applicable_metadata_xml_file_found = false;
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34 | File current_file_directory = (current_file.isDirectory() ? current_file : current_file.getParentFile());
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35 | for (int j = 0; j < metadata_xml_files.size(); j++) {
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36 | MetadataXMLFile metadata_xml_file = (MetadataXMLFile) metadata_xml_files.get(j);
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37 |
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38 | // This metadata.xml file is only applicable if it is at the same level as the file
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39 | if (current_file_directory.getAbsolutePath().equals(metadata_xml_file.getParentFile().getAbsolutePath())) {
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40 | applicable_metadata_xml_file_found = true;
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41 | metadata_xml_file.addMetadata(current_file, metadata_value);
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42 | }
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43 | }
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44 |
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45 | // If no applicable metadata.xml file exists, we have to create a new one
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46 | if (!applicable_metadata_xml_file_found) {
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47 | // Create a new (empty) metadata.xml file in the file's directory...
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48 | File new_metadata_xml_file_file = new File(current_file_directory, "metadata.xml");
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49 | XMLTools.writeXMLFile(new_metadata_xml_file_file, Utility.parse("xml/metadata.xml", true));
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50 |
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51 | // ...load it...
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52 | MetadataXMLFile new_metadata_xml_file = loadMetadataXMLFile(new_metadata_xml_file_file);
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53 |
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54 | // ...and add the metadata
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55 | new_metadata_xml_file.addMetadata(current_file, metadata_value);
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56 | }
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57 | }
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58 | }
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59 |
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60 |
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61 | static public void clearMetadataXMLFiles()
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62 | {
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63 | metadata_xml_files.clear();
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64 | }
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65 |
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66 |
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67 | /** Returns the metadata assigned to files outside the collection, excluding folder-level/inherited metadata. */
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68 | static public ArrayList getMetadataAssignedDirectlyToExternalFile(File file)
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69 | {
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70 | System.err.println("Getting metadata assigned directly to external file " + file + "...");
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71 |
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72 | // Build up a list of applicable metadata.xml files
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73 | ArrayList applicable_metadata_xml_files = new ArrayList();
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74 |
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75 | File directory = (file.isDirectory() ? file : file.getParentFile());
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76 | while (directory != null) {
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77 | File[] directory_files = directory.listFiles();
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78 | for (int i = 0; i < directory_files.length; i++) {
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79 | File child_file = directory_files[i];
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80 | if (!child_file.isDirectory() && child_file.getName().equals("metadata.xml")) {
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81 | System.err.println("Found: " + child_file);
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82 | applicable_metadata_xml_files.add(new MetadataXMLFile(child_file.getAbsolutePath()));
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83 | }
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84 | }
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85 |
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86 | directory = directory.getParentFile();
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87 | }
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88 |
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89 | // Get the metadata assigned to the specified file from the applicable metadata.xml files
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90 | ArrayList assigned_metadata = getMetadataAssignedToFile(file, applicable_metadata_xml_files);
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91 |
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92 | // Remove any folder-level metadata
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93 | for (int i = assigned_metadata.size() - 1; i >= 0; i--) {
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94 | if (((MetadataValue) assigned_metadata.get(i)).isInheritedMetadata()) {
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95 | assigned_metadata.remove(i);
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96 | }
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97 | }
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98 |
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99 | return assigned_metadata;
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100 | }
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101 |
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102 |
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103 | /** This excludes folder-level/inherited metadata. */
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104 | static public ArrayList getMetadataAssignedDirectlyToFile(File file)
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105 | {
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106 | // Build up a list of applicable metadata.xml files
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107 | ArrayList applicable_metadata_xml_files = new ArrayList();
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108 |
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109 | // Look at each loaded metadata.xml file to see if it is potentially applicable
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110 | File file_directory = (file.isDirectory() ? file : file.getParentFile());
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111 | for (int i = 0; i < metadata_xml_files.size(); i++) {
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112 | MetadataXMLFile metadata_xml_file = (MetadataXMLFile) metadata_xml_files.get(i);
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113 |
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114 | // This metadata.xml file is only applicable if it is at the same level as the file
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115 | if (file_directory.getAbsolutePath().equals(metadata_xml_file.getParentFile().getAbsolutePath())) {
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116 | applicable_metadata_xml_files.add(metadata_xml_file);
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117 | }
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118 | }
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119 |
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120 | // Get the metadata assigned to the specified file from the applicable metadata.xml files
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121 | ArrayList assigned_metadata = getMetadataAssignedToFile(file, applicable_metadata_xml_files);
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122 |
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123 | // Remove any folder-level metadata
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124 | for (int i = assigned_metadata.size() - 1; i >= 0; i--) {
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125 | if (((MetadataValue) assigned_metadata.get(i)).isInheritedMetadata()) {
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126 | assigned_metadata.remove(i);
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127 | }
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128 | }
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129 |
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130 | return assigned_metadata;
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131 | }
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132 |
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133 |
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134 | static public ArrayList getMetadataAssignedToFile(File file)
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135 | {
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136 | // Build up a list of applicable metadata.xml files
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137 | ArrayList applicable_metadata_xml_files = new ArrayList();
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138 |
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139 | // Look at each loaded metadata.xml file to see if it is potentially applicable
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140 | File file_directory = (file.isDirectory() ? file : file.getParentFile());
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141 | for (int i = 0; i < metadata_xml_files.size(); i++) {
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142 | MetadataXMLFile metadata_xml_file = (MetadataXMLFile) metadata_xml_files.get(i);
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143 |
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144 | // This metadata.xml file is only potentially applicable if it is above or at the same level as the file
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145 | if (file_directory.getAbsolutePath().startsWith(metadata_xml_file.getParentFile().getAbsolutePath())) {
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146 | applicable_metadata_xml_files.add(metadata_xml_file);
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147 | }
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148 | }
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149 |
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150 | // Return the metadata assigned to the specified file from the applicable metadata.xml files
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151 | return getMetadataAssignedToFile(file, applicable_metadata_xml_files);
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152 | }
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153 |
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154 |
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155 | static private ArrayList getMetadataAssignedToFile(File file, ArrayList applicable_metadata_xml_files)
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156 | {
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157 | // Build up a list of metadata values assigned to this file
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158 | ArrayList metadata_values_all = new ArrayList();
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159 |
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160 | // Look at each applicable metadata.xml file to see if it assigns metadata to this file
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161 | for (int i = 0; i < applicable_metadata_xml_files.size(); i++) {
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162 | MetadataXMLFile metadata_xml_file = (MetadataXMLFile) applicable_metadata_xml_files.get(i);
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163 | System.err.println("Applicable metadata.xml file: " + metadata_xml_file);
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164 |
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165 | ArrayList metadata_values = metadata_xml_file.getMetadataAssignedToFile(file);
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166 | for (int j = 0; j < metadata_values.size(); j++) {
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167 | MetadataValue metadata_value = (MetadataValue) metadata_values.get(j);
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168 |
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169 | // Overriding metadata: remove any values with this metadata element
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170 | if (metadata_value.isAccumulatingMetadata() == false) {
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171 | for (int k = metadata_values_all.size() - 1; k >= 0; k--) {
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172 | if (((MetadataValue) metadata_values_all.get(k)).getMetadataElement().equals(metadata_value.getMetadataElement())) {
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173 | metadata_values_all.remove(k);
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174 | }
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175 | }
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176 | }
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177 |
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178 | metadata_values_all.add(metadata_value);
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179 | }
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180 | }
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181 |
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182 | return metadata_values_all;
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183 | }
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184 |
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185 |
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186 | static public void loadMetadataXMLFiles(File directory)
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187 | {
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188 | // Make sure the directory (import) exists
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189 | if (directory.exists() == false) {
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190 | return;
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191 | }
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192 |
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193 | // Look recursively at each subfile of the directory for metadata.xml files
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194 | File[] directory_files = directory.listFiles();
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195 | for (int i = 0; i < directory_files.length; i++) {
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196 | File child_file = directory_files[i];
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197 | if (child_file.isDirectory()) {
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198 | loadMetadataXMLFiles(child_file);
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199 | }
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200 | else if (child_file.getName().equals("metadata.xml")) {
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201 | loadMetadataXMLFile(child_file);
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202 | }
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203 | }
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204 | }
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205 |
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206 |
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207 | static private MetadataXMLFile loadMetadataXMLFile(File metadata_xml_file_file)
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208 | {
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209 | MetadataXMLFile metadata_xml_file = new MetadataXMLFile(metadata_xml_file_file.getAbsolutePath());
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210 | metadata_xml_files.add(metadata_xml_file);
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211 | return metadata_xml_file;
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212 | }
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213 |
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214 |
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215 | static public void removeMetadata(FileNode file_node, MetadataValue metadata_value)
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216 | {
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217 | FileNode[] file_nodes = new FileNode[1];
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218 | file_nodes[0] = file_node;
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219 | removeMetadata(file_nodes, metadata_value);
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220 | }
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221 |
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222 |
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223 | static public void removeMetadata(FileNode[] file_nodes, MetadataValue metadata_value)
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224 | {
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225 | // Remove the metadata from each file node in turn
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226 | for (int i = 0; i < file_nodes.length; i++) {
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227 | File current_file = file_nodes[i].getFile();
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228 | System.err.println("Removing metadata from " + current_file.getAbsolutePath());
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229 |
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230 | // Find which metadata.xml file needs editing
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231 | File current_file_directory = (current_file.isDirectory() ? current_file : current_file.getParentFile());
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232 | for (int j = 0; j < metadata_xml_files.size(); j++) {
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233 | MetadataXMLFile metadata_xml_file = (MetadataXMLFile) metadata_xml_files.get(j);
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234 |
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235 | // This metadata.xml file is only potentially applicable if it is above or at the same level as the file
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236 | if (current_file_directory.getAbsolutePath().startsWith(metadata_xml_file.getParentFile().getAbsolutePath())) {
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237 | metadata_xml_file.removeMetadata(current_file, metadata_value);
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238 | }
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239 | }
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240 | }
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241 | }
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242 |
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243 |
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244 | static public void unloadMetadataXMLFile(File metadata_xml_file_file)
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245 | {
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246 | System.err.println("Unloading metadata.xml file " + metadata_xml_file_file);
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247 |
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248 | // Find the metadata.xml file in the list of loaded files, and remove it
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249 | for (int i = 0; i < metadata_xml_files.size(); i++) {
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250 | MetadataXMLFile metadata_xml_file = (MetadataXMLFile) metadata_xml_files.get(i);
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251 | if (metadata_xml_file_file.getAbsolutePath().equals(metadata_xml_file.getAbsolutePath())) {
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252 | metadata_xml_files.remove(i);
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253 | break;
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254 | }
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255 | }
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256 | }
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257 | }
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