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.gui.MetadataImportMappingPrompt;
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7 |
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8 |
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9 | /** This class is a static class that manages the metadata sets */
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10 | public class MetadataSetManager
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11 | {
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12 | static public final String EXTRACTED_METADATA_NAMESPACE = "ex";
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13 |
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14 | static private ArrayList metadata_sets = new ArrayList();
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15 |
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16 |
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17 | static public void clearMetadataSets()
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18 | {
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19 | metadata_sets.clear();
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20 | }
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21 |
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22 |
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23 | static public int compareMetadataElements(MetadataElement metadata_element_a, MetadataElement metadata_element_b)
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24 | {
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25 | // First compare the namespaces of the two metadata elements
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26 | if (!metadata_element_a.getNamespace().equals(metadata_element_b.getNamespace())) {
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27 | return metadata_element_a.getNamespace().compareTo(metadata_element_b.getNamespace());
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28 | }
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29 |
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30 | // Otherwise compare the two elements within the one set
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31 | MetadataSet metadata_set = getMetadataSet(metadata_element_a.getNamespace());
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32 | return metadata_set.compareMetadataElements(metadata_element_a, metadata_element_b);
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33 | }
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34 |
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35 |
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36 | static public ArrayList getEveryMetadataSetElement()
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37 | {
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38 | ArrayList every_metadata_set_element = new ArrayList();
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39 |
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40 | for (int i = 0; i < metadata_sets.size(); i++) {
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41 | MetadataSet metadata_set = (MetadataSet) metadata_sets.get(i);
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42 | every_metadata_set_element.addAll(metadata_set.getMetadataSetElements());
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43 | }
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44 |
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45 | return every_metadata_set_element;
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46 | }
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47 |
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48 |
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49 | static public MetadataSet getMetadataSet(String metadata_set_namespace)
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50 | {
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51 | // Find the desired metadata set in the list
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52 | for (int i = 0; i < metadata_sets.size(); i++) {
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53 | MetadataSet metadata_set = (MetadataSet) metadata_sets.get(i);
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54 | if (metadata_set.getNamespace().equals(metadata_set_namespace)) {
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55 | return metadata_set;
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56 | }
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57 | }
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58 |
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59 | // Not found
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60 | // System.err.println("No metadata set with namespace \"" + metadata_set_namespace + "\" found.");
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61 | return null;
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62 | }
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63 |
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64 |
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65 | static public ArrayList getMetadataSets()
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66 | {
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67 | // We don't want anyone to modify the list, so return a copy of it
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68 | return (ArrayList) metadata_sets.clone();
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69 | }
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70 |
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71 |
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72 | static public ArrayList listMetadataSets(File directory)
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73 | {
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74 | // Make sure the directory (metadata) exists
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75 | if (directory.exists() == false) {
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76 | return null;
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77 | }
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78 |
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79 | // Load just those .mds files in this directory, and return them
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80 | ArrayList directory_metadata_sets = new ArrayList();
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81 | File[] directory_files = directory.listFiles();
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82 | for (int i = 0; i < directory_files.length; i++) {
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83 | File child_file = directory_files[i];
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84 | if (!child_file.isDirectory() && child_file.getName().endsWith(".mds")) {
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85 | MetadataSet metadata_set = new MetadataSet(child_file);
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86 | directory_metadata_sets.add(metadata_set);
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87 | }
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88 | }
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89 |
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90 | return directory_metadata_sets;
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91 | }
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92 |
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93 |
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94 | static public void loadMetadataSets(File directory)
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95 | {
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96 | // Make sure the directory (metadata) exists
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97 | if (directory.exists() == false) {
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98 | return;
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99 | }
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100 |
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101 | // Look recursively at each subfile of the directory for .mds files
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102 | File[] directory_files = directory.listFiles();
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103 | for (int i = 0; i < directory_files.length; i++) {
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104 | File child_file = directory_files[i];
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105 | if (child_file.isDirectory()) {
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106 | loadMetadataSets(child_file);
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107 | }
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108 | else if (child_file.getName().endsWith(".mds")) {
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109 | loadMetadataSet(child_file);
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110 | }
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111 | }
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112 | }
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113 |
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114 |
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115 | static public void loadMetadataSet(File metadata_set_file)
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116 | {
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117 | MetadataSet metadata_set = new MetadataSet(metadata_set_file);
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118 | metadata_sets.add(metadata_set);
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119 | }
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120 |
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121 |
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122 | static public String mapUnloadedMetadataElement(String metadata_element_name)
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123 | {
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124 | // Check if we have an import mapping for this metadata element
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125 | String target_metadata_element_name_full = ProfileXMLFileManager.getMetadataElementFor(metadata_element_name);
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126 | if (target_metadata_element_name_full != null) {
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127 | // Yes, so return it
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128 | return target_metadata_element_name_full;
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129 | }
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130 |
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131 | // If there are no metadata sets loaded then there is nothing to map the element into
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132 | if (metadata_sets.size() <= 1) {
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133 | return null;
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134 | }
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135 |
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136 | // Ask the user how they want to deal with this element
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137 | MetadataImportMappingPrompt metadata_import_mapping_prompt = new MetadataImportMappingPrompt(metadata_element_name);
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138 | int result = metadata_import_mapping_prompt.getResult();
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139 |
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140 | // !!! Add the element into an existing metadata set
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141 | if (result == MetadataImportMappingPrompt.ADD_BUTTON_PRESSED) {
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142 | MetadataSet target_metadata_set = metadata_import_mapping_prompt.getSelectedMetadataSet();
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143 | System.err.println("Added to " + target_metadata_set);
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144 | // target_metadata_element_name_full =
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145 | }
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146 |
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147 | // Replace the element with an element in an existing metadata set
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148 | if (result == MetadataImportMappingPrompt.REPLACE_BUTTON_PRESSED) {
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149 | MetadataElement target_metadata_element = metadata_import_mapping_prompt.getSelectedMetadataElement();
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150 | target_metadata_element_name_full = target_metadata_element.getFullName();
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151 | }
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152 |
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153 | // Ignore the element
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154 | if (result == MetadataImportMappingPrompt.IGNORE_BUTTON_PRESSED) {
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155 | target_metadata_element_name_full = "";
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156 | }
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157 |
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158 | // Store this import mapping for future elements with the same name
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159 | ProfileXMLFileManager.mapElement(metadata_element_name, target_metadata_element_name_full);
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160 |
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161 | return target_metadata_element_name_full;
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162 | }
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163 |
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164 |
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165 | static public void unloadMetadataSet(MetadataSet metadata_set)
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166 | {
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167 | // Find the metadata set in the list of loaded sets, and remove it
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168 | for (int i = 0; i < metadata_sets.size(); i++) {
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169 | if (metadata_set == (MetadataSet) metadata_sets.get(i)) {
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170 | metadata_sets.remove(i);
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171 | break;
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172 | }
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173 | }
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174 | }
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175 |
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176 |
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177 | static public void writeHierarchyFiles(File directory)
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178 | {
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179 | // Make sure the directory (etc) exists
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180 | if (directory.exists() == false) {
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181 | return;
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182 | }
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183 |
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184 | // Write a hierarchy file for each loaded metadata element, except extracted metadata
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185 | ArrayList every_metadata_set_element = getEveryMetadataSetElement();
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186 | for (int i = 0; i < every_metadata_set_element.size(); i++) {
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187 | MetadataElement metadata_element = (MetadataElement) every_metadata_set_element.get(i);
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188 | if (metadata_element.isExtractedMetadata() == false) {
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189 | File hierarchy_file = new File(directory, metadata_element.getFullName() + ".txt");
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190 | metadata_element.writeHierarchyFile(hierarchy_file);
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191 | }
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192 | }
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193 | }
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194 | }
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