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annotate src/java/de/intevation/mxd/writer/MapScriptWriter.java @ 126:ff0354265a7d

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Write the correct expression for double values.
author Raimund Renkert <rrenkert@intevation.de>
date Fri, 17 Jun 2011 18:22:40 +0200
parents 0f5819732288
children 5ba8bf865dc7
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 logger.debug("write()");
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61 this.root = doc;
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62
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63 //Get the filename.
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64 Element fileNode = (Element)XMLUtils.xpath(
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65 root,
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66 "/mxd/file",
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67 XPathConstants.NODE);
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68 //Write the map attributes.
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69 writeMap();
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70 //Write the layers.
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71 writeLayer();
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72 //Save the map.
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73 mapObj cloneMap = map.cloneMap();
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74 cloneMap.save(mapFilename);
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75 logger.info("Mapfile successfully created.");
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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 logger.debug("writeLayer()");
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138 Element mapNode = (Element)XMLUtils.xpath(
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139 root,
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140 "/mxd/map",
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141 XPathConstants.NODE);
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142 NodeList list = mapNode.getElementsByTagName("layer");
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143 for(int i = 0; i < list.getLength(); i++) {
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144 Element layerElement = (Element)list.item(i);
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145 layerObj layer = new layerObj(map);
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146
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147 //The layer name.
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148 layer.setName(layerElement.getAttribute("name"));
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149
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150 //The layer status.
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151 String stat = layerElement.getAttribute("status");
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152 if (stat.equals("on")) {
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153 layer.setStatus(1);
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154 }
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155 else {
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156 layer.setStatus(0);
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157 }
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158
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159 //The scale.
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160 double maxScale =
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161 Double.parseDouble(layerElement.getAttribute("max_scale"));
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162 double minScale =
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163 Double.parseDouble(layerElement.getAttribute("min_scale"));
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164 layer.setMaxscaledenom(maxScale);
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165 layer.setMinscaledenom(minScale);
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166
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167 //The layer type.
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168 String type = layerElement.getAttribute("type");
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169 if(type.equals("point")) {
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170 layer.setType(MS_LAYER_TYPE.MS_LAYER_POINT);
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171 }
62
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172 else if (type.equals("line")) {
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173 layer.setType(MS_LAYER_TYPE.MS_LAYER_LINE);
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174 }
97
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175 else if (type.equals("polygon")) {
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176 layer.setType(MS_LAYER_TYPE.MS_LAYER_POLYGON);
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177 }
102
3ca2ec55fb3b Set TILEITEM to an empty string.
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178 layer.setTileitem("");
42
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179
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180 //The layer datasource.
98
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181 String datasource = "";
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182 if(layerElement.hasAttribute("workspace")) {
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183 datasource = layerElement.getAttribute("workspace");
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184 datasource += File.separator;
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185 }
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186 datasource += layerElement.getAttribute("data_source");
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187 layer.setData(datasource);
42
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188
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189 //Write classes.
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190 writeClass(layer, layerElement);
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191 }
41
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192
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193 }
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194
42
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195 /**
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196 * Adds the classes to the layer.
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197 * @param layer Mapscript layer object.
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198 * @param layerElement Dom element containing the class attributes.
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199 */
120
11d63bf00326 Changed exception handling and logging in writer classes.
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200 private void writeClass(layerObj layer, Element layerElement) {
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201 logger.debug("writeClass(layerObj, Element)");
42
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202 //Get all renderer elements (renderer in arcgis equals class in the
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203 //mapfile.)
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204 NodeList list = layerElement.getElementsByTagName("renderer");
41
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205
42
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206 //Create all found class objects and write the symbols and styles for
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207 //each class.
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208 for(int i = 0; i < list.getLength(); i++) {
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209 Element classElement = (Element)list.item(i);
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210 classObj co = new classObj(layer);
124
0f5819732288 Set label text as class name in mapfile.
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211 String name = classElement.getAttribute("label");
99
d6d2a4058ebf Set the class name to the layer name if it is empty.
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212 if (name.equals("")) {
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213 name = layerElement.getAttribute("name");
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214 if (list.getLength() > 1) {
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215 name += "-" + i;
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216 }
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217 }
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218 co.setName (name);
44
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219 if(classElement.hasAttribute("field_count")) {
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220 int count =
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221 Integer.parseInt(classElement.getAttribute("field_count"));
126
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222 int type = 0;
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223 try {
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224 Double.parseDouble(classElement.getAttribute("value"));
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225 type = 1;
44
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226 }
126
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227 catch(Exception e) {
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228 type = 2;
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229 logger.info("not a double");
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230 }
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231 if (type == 1) {
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232 co.setExpression(createDoubleExpression(classElement, count));
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233 }
44
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234 }
42
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235 //Write symbols and styles.
97
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236 NodeList l = classElement.getChildNodes();
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237 for (int j = 0; j < l.getLength(); j++) {
18e4f143896b Added polygon writer.
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238 Element elem = (Element)l.item(j);
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239
18e4f143896b Added polygon writer.
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240 String type = layerElement.getAttribute("type");
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241 if(type.equals("point") && elem.getTagName().equals("symbol")) {
87
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242 MarkerStyleWriter swriter = new MarkerStyleWriter (this.map, co);
97
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243 swriter.write (elem);
87
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244 }
97
18e4f143896b Added polygon writer.
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parents: 96
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245 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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parents: 91
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246 LineStyleWriter swriter = new LineStyleWriter (this.map, co);
97
18e4f143896b Added polygon writer.
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247 swriter.write (elem);
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248 }
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parents: 96
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249 else if(type.equals("polygon") && elem.getTagName().equals("symbol")) {
18e4f143896b Added polygon writer.
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250 FillStyleWriter swriter = new FillStyleWriter (this.map, co);
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251 swriter.write (elem);
87
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252 }
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253 }
42
395307e8b7ee First MapScript Writer that generates valid mapfiles.
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diff changeset
254 }
41
60ed2164035a Introduced MapScript writer.
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255 }
126
ff0354265a7d Write the correct expression for double values.
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256
ff0354265a7d Write the correct expression for double values.
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257 private String createDoubleExpression (Element classElement, int count) {
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258 String exp = "";
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259 String op = classElement.getAttribute("expression_operator");
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260 String op1 = "";
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261 String op2 = "";
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262 if (op.equals("<=")) {
ff0354265a7d Write the correct expression for double values.
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263 op1 = ">=";
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264 op2 = op;
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parents: 124
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265 for(int j = 0; j < count; j++) {
ff0354265a7d Write the correct expression for double values.
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diff changeset
266 if (classElement.getAttribute("min_value").equals(
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diff changeset
267 classElement.getAttribute("value"))) {
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268 exp = "([" +
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269 classElement.getAttribute(
ff0354265a7d Write the correct expression for double values.
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270 "expression_field_" + j) +
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271 "] == " +
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272 classElement.getAttribute("value") +
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273 ")";
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274 }
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275 else {
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276 exp = "([";
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277 exp += classElement.getAttribute(
ff0354265a7d Write the correct expression for double values.
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278 "expression_field_" + j);
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279 exp += "] " + op1;
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280 exp += " " + classElement.getAttribute("min_value");
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281 exp += " AND [" + classElement.getAttribute(
ff0354265a7d Write the correct expression for double values.
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282 "expression_field_" + j);
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283 exp += "] " + op2 + " ";
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284 exp += classElement.getAttribute("value");
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285 exp += ")";
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286 }
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287 }
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288 }
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289 else if (op.equals("==")) {
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290 op1 = op;
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291 for(int j = 0; j < count; j++) {
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292 exp = "([" +
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293 classElement.getAttribute("expression_field_" + j) +
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294 "] == " +
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295 classElement.getAttribute("value") + ")";
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296 }
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297 }
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298 return exp;
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299 }
41
60ed2164035a Introduced MapScript writer.
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300 }
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301
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