Mercurial > mxd2map

annotate src/java/de/intevation/mxd/utils/MapToXMLUtils.java @ 181:0bde090506f9

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Added comments.
author Raimund Renkert <rrenkert@intevation.de>
date Mon, 11 Jul 2011 14:28:38 +0200
parents f4eb506499f5
children df4e0946ef02
rev   line source
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8 package de.intevation.mxd.utils;
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9
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10 import org.apache.log4j.Logger;
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11
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12 import org.w3c.dom.Document;
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13 import org.w3c.dom.Element;
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14 import org.w3c.dom.NodeList;
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15 import org.w3c.dom.DOMException;
31
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16
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17 /**
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18 * Utility class to store map information in a XML structure.
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19 *
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20 * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
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21 */
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22 public class MapToXMLUtils
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23 {
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24 /**
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25 * The logger.
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26 */
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27 private static final Logger logger = Logger.getLogger(MapToXMLUtils.class);
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28
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29 /**
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30 * Private member.
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31 */
31
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32 private Document root;
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33 private Element rootElement;
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34 private XMLUtils.ElementCreator creator;
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35
43
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36
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37 public MapToXMLUtils() {
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38 this.root = XMLUtils.newDocument();
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39 creator = new XMLUtils.ElementCreator(root, "", "");
38
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40 rootElement = creator.create("mxd");
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41 root.appendChild(rootElement);
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42 }
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43
43
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44 /**
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45 * Add the mxd filename to the dom.
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46 * @param path Path to the mxdfile.
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47 * @return Currently always true.
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48 */
38
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49 public boolean addFilename(String path) {
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50 Element file = creator.create("file");
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51 file.setAttribute("name", path);
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52 rootElement.appendChild(file);
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53 return true;
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54 }
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55
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56 /**
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57 * Create the top level map element.
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58 * @return The new map element.
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59 */
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60 public Element createMap()
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61 throws Exception {
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62 Element map;
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63 NodeList list = root.getElementsByTagName("map");
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64 if(list == null || list.getLength() == 0){
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65 map = creator.create("map");
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66 rootElement.appendChild(map);
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67 }
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68 else if(list.getLength() == 1){
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69 map = (Element)list.item(0);
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70 }
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71 else{
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72 throw new Exception("Error while creating map node.");
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73 }
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74 return map;
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75 }
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76
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77 /**
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78 * Add a layer element to the map.
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79 * @param name The layer name.
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80 * @return The layer element.
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81 */
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82 public Element addLayer()
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83 throws Exception {
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84 Element node = creator.create("layer");
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85 NodeList list = root.getElementsByTagName("map");
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86 if(list == null || list.getLength() == 0){
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87 throw new Exception("No map node found!");
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88 }
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89 else if(list.getLength() > 1) {
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90 throw new Exception("Found more than one map node." +
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91 " This should never happen!");
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92 }
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93 else {
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94 list.item(0).appendChild(node);
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95 return node;
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96 }
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97 }
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98
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99 /**
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100 * Remove a layer element from map.
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101 * @param name The layer name.
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102 */
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103 public void removeLayer(Element layerElement) {
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104 NodeList list = root.getElementsByTagName("map");
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105 if(list == null || list.getLength() == 0){
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106 return;
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107 }
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108 else if(list.getLength() > 1) {
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109 return;
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110 }
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111 else {
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112 try {
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113 list.item(0).removeChild(layerElement);
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114 }
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115 catch(DOMException de) {
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116 return;
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117 }
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118 }
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119 }
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120
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121 /**
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122 * Add a renderer element to the map.
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123 * @param layer The parent layer element.
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124 * @return The renderer element.
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125 */
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126 public Element addRenderer(Element layer) {
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127 Element node = creator.create("renderer");
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128 layer.appendChild(node);
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129 return node;
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130 }
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131
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132 /**
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133 * Add a symbol element to the map.
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134 * @param renderer The parent renderer element.
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135 * @return The symbol element.
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136 */
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137 public Element addSymbol(Element renderer) {
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138 Element node = creator.create("symbol");
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139 renderer.appendChild(node);
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140 return node;
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141 }
180
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142
179
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143 /**
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144 * Add a label element to the map.
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145 * @param layer The parent layer element.
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146 * @return The label element.
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147 */
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148 public Element addLabel(Element layer) {
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149 Element node = creator.create("label");
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150 layer.appendChild(node);
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151 return node;
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152 }
31
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153
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154 /**
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155 * Print out the XML document.
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156 */
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157 public void print() {
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158 XMLUtils.toStream(root, System.out);
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159 }
38
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160
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161 /**
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162 * Get the DOM document.
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163 * @return The root document.
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164 */
38
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165 public Document getDocument() {
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166 return root;
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167 }
31
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168 }
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