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annotate src/java/de/intevation/mxd/writer/MapScriptWriter.java @ 117:6c3d880db7c5

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Improved exception handling for layer reader.
author Raimund Renkert <rrenkert@intevation.de>
date Thu, 16 Jun 2011 12:05:34 +0200
parents 3ca2ec55fb3b
children 11d63bf00326
rev   line source
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1 package de.intevation.mxd.writer;
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2
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3 import org.apache.log4j.Logger;
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4
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5 import org.w3c.dom.Document;
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6 import org.w3c.dom.Element;
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7 import org.w3c.dom.NodeList;
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8
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9 import java.io.File;
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10
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11 import javax.xml.xpath.XPathConstants;
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12
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13 import edu.umn.gis.mapscript.mapObj;
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14 import edu.umn.gis.mapscript.layerObj;
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15 import edu.umn.gis.mapscript.classObj;
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16
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17 import edu.umn.gis.mapscript.MS_UNITS;
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18 import edu.umn.gis.mapscript.MS_LAYER_TYPE;
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19
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20 import de.intevation.mxd.utils.XMLUtils;
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21
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22 /**
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23 * The Mapfile Writer.
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24 * This Writer uses the MapScript Java API to create Mapfiles from a DOM.
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25 *
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26 * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
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27 */
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28 public class MapScriptWriter
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29 implements IWriter
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30 {
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31 /**
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32 * The Logger.
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33 */
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34 private static final Logger logger = Logger.getLogger(MapScriptWriter.class);
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35
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36 /**
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37 * Private member.
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38 */
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39 private Document root;
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40 private mapObj map;
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41 private String mapFilename;
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42
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43 public MapScriptWriter() {
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44 map = new mapObj("");
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45 mapFilename = "";
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46 }
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47
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48 public MapScriptWriter(String templ, String filename) {
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49 map = new mapObj(templ);
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50 mapFilename = filename;
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51 }
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52
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53 /**
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54 * Write the mapfile.
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55 * @param doc The root document containin the map attributes.
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56 *
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57 * @return Currently always true.
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58 */
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59 public boolean write(Document doc)
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60 throws Exception {
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61 logger.debug("write()");
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62 this.root = doc;
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63
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64 //Get the filename.
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65 Element fileNode = (Element)XMLUtils.xpath(
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66 root,
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67 "/mxd/file",
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68 XPathConstants.NODE);
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69 //Write the map attributes.
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70 writeMap();
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71 //Write the layers.
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72 writeLayer();
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73 //Save the map.
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74 mapObj cloneMap = map.cloneMap();
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75 cloneMap.save(mapFilename);
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76 return true;
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77 }
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78
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79 /**
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80 * Create the map object and set the attributes.
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81 */
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82 private void writeMap() {
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83 logger.debug("writeMap()");
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84 //Get the map.
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85 Element mapNode = (Element)XMLUtils.xpath(
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86 root,
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87 "/mxd/map",
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88 XPathConstants.NODE);
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89
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90 //Set the name.
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91 map.setName(mapNode.getAttribute("name"));
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92 map.setMetaData("wms_title", mapNode.getAttribute("name"));
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93 //Set the extent.
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94 map.setExtent(
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95 Double.parseDouble(mapNode.getAttribute("extent_min_x")),
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96 Double.parseDouble(mapNode.getAttribute("extent_min_y")),
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97 Double.parseDouble(mapNode.getAttribute("extent_max_x")),
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98 Double.parseDouble(mapNode.getAttribute("extent_max_y")));
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99
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100 //Set the units.
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101 String units = mapNode.getAttribute("units");
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102 MS_UNITS msu;
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103 if(units.equals("feet")) {
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104 msu = MS_UNITS.MS_FEET;
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105 }
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106 else if(units.equals("inches")) {
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107 msu = MS_UNITS.MS_INCHES;
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108 }
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109 else if(units.equals("kilometers")) {
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110 msu = MS_UNITS.MS_KILOMETERS;
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111 }
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112 else if(units.equals("meters")) {
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113 msu = MS_UNITS.MS_METERS;
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114 }
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115 else if(units.equals("miles")) {
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116 msu = MS_UNITS.MS_MILES;
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117 }
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118 else if(units.equals("nauticalmiles")) {
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119 msu = MS_UNITS.MS_NAUTICALMILES;
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120 }
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121 else if(units.equals("points")) {
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122 msu = MS_UNITS.MS_PIXELS;
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123 }
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124 else {
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125 msu = MS_UNITS.MS_METERS;
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126 }
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127 map.setUnits(msu);
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128
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129 //TODO: Find out whats the correct scale value.
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130 //map.setScaledenom(Double.parseDouble(mapNode.getAttribute("scale")));
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131 }
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132
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133 /**
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134 * Create layer objects and set the attributes.
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135 */
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136 private void writeLayer()
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137 throws Exception {
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138 logger.debug("writeLayer()");
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139 Element mapNode = (Element)XMLUtils.xpath(
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140 root,
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141 "/mxd/map",
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142 XPathConstants.NODE);
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143 NodeList list = mapNode.getElementsByTagName("layer");
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144 for(int i = 0; i < list.getLength(); i++) {
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145 Element layerElement = (Element)list.item(i);
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146 layerObj layer = new layerObj(map);
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147
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148 //The layer name.
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149 layer.setName(layerElement.getAttribute("name"));
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150
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151 //The layer status.
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152 String stat = layerElement.getAttribute("status");
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153 if (stat.equals("on")) {
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154 layer.setStatus(1);
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155 }
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156 else {
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157 layer.setStatus(0);
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158 }
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159
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160 //The scale.
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161 double maxScale =
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162 Double.parseDouble(layerElement.getAttribute("max_scale"));
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163 double minScale =
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164 Double.parseDouble(layerElement.getAttribute("min_scale"));
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165 layer.setMaxscaledenom(maxScale);
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166 layer.setMinscaledenom(minScale);
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167
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168 //The layer type.
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169 String type = layerElement.getAttribute("type");
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170 if(type.equals("point")) {
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171 layer.setType(MS_LAYER_TYPE.MS_LAYER_POINT);
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172 }
62
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173 else if (type.equals("line")) {
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174 layer.setType(MS_LAYER_TYPE.MS_LAYER_LINE);
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175 }
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176 else if (type.equals("polygon")) {
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177 layer.setType(MS_LAYER_TYPE.MS_LAYER_POLYGON);
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178 }
102
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179 layer.setTileitem("");
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180
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181 //The layer datasource.
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182 String datasource = "";
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183 if(layerElement.hasAttribute("workspace")) {
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184 datasource = layerElement.getAttribute("workspace");
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185 datasource += File.separator;
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186 }
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187 datasource += layerElement.getAttribute("data_source");
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188 layer.setData(datasource);
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189
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190 //Write classes.
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191 writeClass(layer, layerElement);
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192 }
41
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193
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194 }
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195
42
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196 /**
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197 * Adds the classes to the layer.
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198 * @param layer Mapscript layer object.
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199 * @param layerElement Dom element containing the class attributes.
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200 */
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201 private void writeClass(layerObj layer, Element layerElement)
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202 throws Exception {
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203 logger.debug("writeClass(layerObj, Element)");
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204 //Get all renderer elements (renderer in arcgis equals class in the
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205 //mapfile.)
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206 NodeList list = layerElement.getElementsByTagName("renderer");
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207
42
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208 //Create all found class objects and write the symbols and styles for
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209 //each class.
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210 for(int i = 0; i < list.getLength(); i++) {
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211 Element classElement = (Element)list.item(i);
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212 classObj co = new classObj(layer);
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213 String name = classElement.getAttribute("name");
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214 if (name.equals("")) {
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215 name = layerElement.getAttribute("name");
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216 if (list.getLength() > 1) {
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217 name += "-" + i;
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218 }
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219 }
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220 co.setName (name);
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221 if(classElement.hasAttribute("field_count")) {
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222 int count =
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223 Integer.parseInt(classElement.getAttribute("field_count"));
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224 String exp = "";
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225 for(int j = 0; j < count; j++) {
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226 //TODO Find a way to create Expressions.
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227 exp = "([" + classElement.getAttribute("expression_field_" + j);
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228 exp += "] " + classElement.getAttribute("expression_operator");
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229 exp += " " + classElement.getAttribute("value") + ")";
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230 }
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231 co.setExpression(exp);
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232 }
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233 //Write symbols and styles.
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234 NodeList l = classElement.getChildNodes();
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235 for (int j = 0; j < l.getLength(); j++) {
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236 Element elem = (Element)l.item(j);
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237
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238 String type = layerElement.getAttribute("type");
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239 if(type.equals("point") && elem.getTagName().equals("symbol")) {
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240 MarkerStyleWriter swriter = new MarkerStyleWriter (this.map, co);
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241 swriter.write (elem);
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242 }
97
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243 else if(type.equals("line") && elem.getTagName().equals("symbol")) {
95
1ae8e05b863f Use the line style writer to write simple lines and marker lines.
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244 LineStyleWriter swriter = new LineStyleWriter (this.map, co);
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245 swriter.write (elem);
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246 }
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247 else if(type.equals("polygon") && elem.getTagName().equals("symbol")) {
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248 FillStyleWriter swriter = new FillStyleWriter (this.map, co);
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249 swriter.write (elem);
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250 }
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251 }
42
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252 }
41
60ed2164035a Introduced MapScript writer.
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253 }
60ed2164035a Introduced MapScript writer.
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254 }
60ed2164035a Introduced MapScript writer.
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255
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