1 | /**
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2 | *#########################################################################
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3 | *
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4 | * A component of the Gatherer application, part of the Greenstone digital
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5 | * library suite from the New Zealand Digital Library Project at the
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6 | * University of Waikato, New Zealand.
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7 | *
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8 | * Author: John Thompson, Greenstone Digital Library, University of Waikato
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9 | *
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10 | * Copyright (C) 1999 New Zealand Digital Library Project
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11 | *
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12 | * This program is free software; you can redistribute it and/or modify
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13 | * it under the terms of the GNU General Public License as published by
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14 | * the Free Software Foundation; either version 2 of the License, or
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15 | * (at your option) any later version.
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16 | *
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17 | * This program is distributed in the hope that it will be useful,
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18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 | * GNU General Public License for more details.
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21 | *
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22 | * You should have received a copy of the GNU General Public License
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23 | * along with this program; if not, write to the Free Software
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24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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25 | *########################################################################
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26 | */
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27 | package org.greenstone.gatherer.cdm;
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28 |
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29 | import java.awt.*;
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30 | import java.awt.event.*;
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31 | import java.util.*;
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32 | import javax.swing.*;
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33 | import javax.swing.event.*;
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34 | import org.greenstone.gatherer.Configuration;
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35 | import org.greenstone.gatherer.DebugStream;
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36 | import org.greenstone.gatherer.Gatherer;
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37 | import org.greenstone.gatherer.util.StaticStrings;
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38 | import org.greenstone.gatherer.util.Utility;
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39 | import org.w3c.dom.*;
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40 |
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41 | /** This class is responsible for maintaining a list of assigned collection level metadata, and for allows manipulations on the aforementioned data.
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42 | * @author John Thompson, Greenstone Digital Library, University of Waikato
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43 | * @version 2.3d
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44 | */
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45 | public class CollectionMetaManager
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46 | extends DOMProxyListModel {
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47 |
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48 | /** Constructor. */
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49 | public CollectionMetaManager() {
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50 | super(CollectionDesignManager.collect_config.getDocumentElement(), StaticStrings.COLLECTIONMETADATA_ELEMENT, new CollectionMeta(""));
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51 | DebugStream.println("CollectionMetaManager: " + getSize() + " metadata parsed.");
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52 | }
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53 | /** Method to add a new piece of metadata.
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54 | * @param metadata the new CollectionMeta
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55 | */
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56 | public void addMetadatum(CollectionMeta metadata) {
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57 | if(!contains(metadata)) {
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58 | Element element = metadata.getElement();
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59 | // Locate where we should insert this new subcollection.
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60 | Node target_node = CollectionConfiguration.findInsertionPoint(element);
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61 | add(root, metadata, target_node);
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62 | Gatherer.c_man.configurationChanged();
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63 | }
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64 | Gatherer.c_man.configurationChanged();
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65 | }
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66 |
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67 | public CollectionMeta get(int i) {
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68 | return (CollectionMeta) getElementAt(i);
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69 | }
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70 |
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71 | /** Retrieve the languages in use for the metadata assigned to this collection
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72 | * @return an TreeSet containing the languages used
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73 | */
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74 | public TreeSet getLanguages() {
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75 | TreeSet result = new TreeSet();
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76 | int size = getSize();
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77 | for(int i = 0; i < size; i++) {
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78 | CollectionMeta metadata = (CollectionMeta) getElementAt(i);
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79 | String language = metadata.getLanguage();
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80 | result.add(language);
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81 | }
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82 | return result;
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83 | }
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84 |
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85 | /** Retrieve all of the general metadata. */
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86 | public ArrayList getMetadata() {
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87 | ArrayList result = new ArrayList();
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88 | int size = getSize();
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89 | for(int i = 0; i < size; i++) {
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90 | CollectionMeta metadata = (CollectionMeta) getElementAt(i);
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91 | if(!metadata.getName().startsWith(StaticStrings.STOP_CHARACTER)) {
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92 | result.add(metadata);
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93 | }
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94 | }
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95 | return result;
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96 | }
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97 |
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98 | /** Retrieve all of the metadata for the given feature, regardless of language. */
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99 | public ArrayList getMetadata(String name) {
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100 | ArrayList result = new ArrayList();
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101 | int size = getSize(); // Refresh DOM Model
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102 | for(int i = 0; i < size; i++) {
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103 | CollectionMeta metadata = (CollectionMeta) getElementAt(i);
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104 | if(metadata.getName().equals(name)) {
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105 | result.add(metadata);
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106 | }
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107 | }
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108 | return result;
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109 | }
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110 |
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111 | /** Retrieve the named piece of metadata, in the default language, if available. If no such metadata is available then it is created.
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112 | * @param name the name of the metadatum to retrieve as a String
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113 | * @return the dom Element containing the specified metadatum
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114 | */
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115 | public CollectionMeta getMetadatum(String name) {
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116 | return getMetadatum(name, true);
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117 | }
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118 |
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119 | public CollectionMeta getMetadatum(String name, boolean add_if_not_found) {
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120 | //DebugStream.println("Get the metadata for " + name + " in the default language.");
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121 | int size = getSize();
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122 | for(int i = 0; i < size; i++) {
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123 | CollectionMeta metadatum = (CollectionMeta) getElementAt(i);
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124 | if(metadatum.getName().equals(name) && metadatum.getLanguage().equals(Configuration.getLanguage())) {
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125 | DebugStream.println("Found '" + metadatum + "'");
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126 | return metadatum;
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127 | }
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128 | else {
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129 | //DebugStream.println("No match with: " + metadatum.getName() + " [l=" + metadatum.getLanguage() + "] \"" + metadatum.getValue() + "\"");
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130 | }
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131 | metadatum = null;
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132 | }
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133 | if(add_if_not_found) {
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134 | CollectionMeta result = new CollectionMeta(name);
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135 | addMetadatum(result);
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136 | DebugStream.println("Added new metadata: " + name);
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137 | return result;
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138 | }
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139 | else {
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140 | return null;
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141 | }
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142 | }
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143 |
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144 | /** Method to retrieve a certain piece of metadata based on its name and language.
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145 | * @param name the name of the metadata as an Object (as it may actually be a refernce to an Index or SubIndex)
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146 | * @param language the language of the metadata.
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147 | * @param partial <i>true</i> to return the first partial match (ie matches name but not language).
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148 | * @return The <strong>CollectionMeta</strong> requested, or <i>null</i> if no such metadata.
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149 | */
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150 | public CollectionMeta getMetadata(String name, String language, boolean partial) {
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151 | CollectionMeta partial_match = null;
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152 | for(int i = 0; i < getSize(); i++) {
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153 | CollectionMeta metadata = (CollectionMeta) getElementAt(i);
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154 | Object metadata_name = metadata.getName();
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155 | // We test the case of an object match (ie Index to Index)...
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156 | if(metadata_name.equals(name)) {
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157 | if (metadata.getLanguage().equals(language)) {
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158 | return metadata;
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159 | }
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160 | partial_match = metadata;
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161 | }
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162 | }
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163 | if(partial) {
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164 | return partial_match;
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165 | }
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166 | return null;
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167 | }
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168 |
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169 | /** Method to remove a piece of metadata.
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170 | * @param metadata metadata
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171 | */
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172 | public void removeMetadata(CollectionMeta metadata) {
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173 | if(metadata != null) {
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174 | String name = metadata.getName();
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175 | String language = metadata.getLanguage();
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176 | for(int i = 0; i < getSize(); i++) {
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177 | CollectionMeta other = (CollectionMeta) getElementAt(i);
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178 | if(name.equals(other.getName()) && language.equals(other.getLanguage())) {
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179 | remove(i);
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180 | Gatherer.c_man.configurationChanged();
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181 | return;
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182 | }
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183 | other = null;
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184 | }
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185 | language = null;
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186 | name = null;
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187 | }
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188 | }
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189 |
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190 | /** Removes all of the metadata with a certain name, regardless of language or value. */
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191 | public void removeMetadata(String name) {
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192 | boolean removed_entry = false;
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193 | for(int i = getSize(); i != 0; i--) {
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194 | CollectionMeta other = (CollectionMeta) getElementAt(i - 1);
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195 | if(name.equals(other.getName())) {
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196 | remove(i - 1);
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197 | removed_entry = true;
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198 | }
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199 | other = null;
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200 | }
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201 | if(removed_entry) {
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202 | Gatherer.c_man.configurationChanged();
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203 | }
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204 | }
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205 |
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206 | public int size() {
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207 | return getSize();
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208 | }
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209 | }
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