1 | package org.greenstone.gatherer.metadata;
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2 |
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3 |
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4 | import java.io.File;
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5 | import org.greenstone.gatherer.util.XMLTools;
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6 | import org.w3c.dom.*;
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7 |
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8 |
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9 | /** This class represents one Metadata element */
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10 | public class MetadataElement
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11 | {
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12 | private String metadata_element_name_full = null;
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13 | private Element metadata_element_element = null;
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14 | private MetadataValueTreeModel metadata_value_tree_model = null;
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15 |
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16 |
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17 | public MetadataElement(String metadata_element_name_full, Element metadata_element_element)
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18 | {
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19 | this.metadata_element_name_full = metadata_element_name_full;
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20 | this.metadata_element_element = metadata_element_element;
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21 | this.metadata_value_tree_model = new MetadataValueTreeModel(this);
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22 | }
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23 |
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24 |
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25 | public MetadataValueTreeNode addMetadataValue(String metadata_value)
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26 | {
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27 | return metadata_value_tree_model.addMetadataValue(metadata_value);
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28 | }
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29 |
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30 |
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31 | public String getAttribute(String attribute_name, String language_code)
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32 | {
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33 | // Some extracted metadata elements may not be in ex.mds, and so have no attributes
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34 | if (metadata_element_element == null) {
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35 | return null;
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36 | }
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37 |
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38 | Element parent_element = metadata_element_element;
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39 | boolean language_matches = false;
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40 |
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41 | NodeList language_elements_nodelist = metadata_element_element.getElementsByTagName("Language");
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42 | for (int i = 0; i < language_elements_nodelist.getLength(); i++) {
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43 | Element current_language_element = (Element) language_elements_nodelist.item(i);
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44 | String current_language_element_code = current_language_element.getAttribute("code");
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45 | if (current_language_element_code.equals(language_code)) {
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46 | // Found language; use it for the next step
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47 | parent_element = current_language_element;
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48 | language_matches = true;
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49 | break;
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50 | }
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51 | }
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52 |
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53 | NodeList attribute_elements_nodelist = parent_element.getElementsByTagName("Attribute");
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54 | for (int i = 0; i < attribute_elements_nodelist.getLength(); i++) {
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55 | Element current_attribute_element = (Element) attribute_elements_nodelist.item(i);
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56 | String current_attribute_element_name = current_attribute_element.getAttribute("name");
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57 | if (!current_attribute_element_name.equals(attribute_name)) {
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58 | // Move on to the next Attribute element if the name doesn't match
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59 | continue;
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60 | }
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61 |
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62 | // Check if the language matches
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63 | String current_attribute_element_language = current_attribute_element.getAttribute("language");
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64 | if (language_matches || current_attribute_element_language.equals(language_code)) {
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65 | // Found attribute; returns its value
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66 | return XMLTools.getElementTextValue(current_attribute_element);
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67 | }
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68 | }
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69 |
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70 | return null;
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71 | }
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72 |
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73 |
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74 | public MetadataValueTreeModel getMetadataValueTreeModel()
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75 | {
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76 | return metadata_value_tree_model;
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77 | }
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78 |
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79 |
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80 | public MetadataValueTreeNode getMetadataValueTreeNode(String metadata_value)
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81 | {
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82 | return metadata_value_tree_model.getMetadataValueTreeNode(metadata_value);
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83 | }
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84 |
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85 |
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86 | public String getFullName()
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87 | {
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88 | return metadata_element_name_full;
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89 | }
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90 |
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91 |
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92 | public String getNamespace()
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93 | {
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94 | return MetadataTools.getMetadataSetNamespace(metadata_element_name_full);
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95 | }
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96 |
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97 |
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98 | public String getName()
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99 | {
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100 | return MetadataTools.getMetadataElementName(metadata_element_name_full);
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101 | }
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102 |
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103 |
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104 | public boolean isExtractedMetadata()
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105 | {
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106 | return getNamespace().equals(MetadataSetManager.EXTRACTED_METADATA_NAMESPACE);
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107 | }
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108 |
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109 |
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110 | /** This is used to display the element in the metadata value table */
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111 | public String toString()
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112 | {
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113 | return metadata_element_name_full;
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114 | }
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115 |
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116 |
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117 | public void writeHierarchyFile(File hierarchy_file)
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118 | {
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119 | metadata_value_tree_model.writeHierarchyFile(hierarchy_file);
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120 | }
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121 | }
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