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annotate flys-artifacts/src/main/java/de/intevation/flys/utils/MapfileGenerator.java @ 1134:bcf70a452646

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Read barrier layers from filesystem while mapfile creation and build a facet for this layer in the artifact. flys-artifacts/trunk@2654 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 06 Sep 2011 15:25:54 +0000
parents da3c3e286c88
children 6c0b79efd2c9
rev   line source
1129
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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1 package de.intevation.flys.utils;
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2
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3 import java.io.File;
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4 import java.io.FileNotFoundException;
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5 import java.io.FileWriter;
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6 import java.io.IOException;
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7 import java.io.StringWriter;
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8 import java.io.Writer;
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9
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10 import java.util.ArrayList;
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11 import java.util.Date;
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12 import java.util.List;
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13
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14 import org.apache.log4j.Logger;
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15
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16 import org.apache.velocity.Template;
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17 import org.apache.velocity.VelocityContext;
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18 import org.apache.velocity.app.VelocityEngine;
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19
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20 import de.intevation.flys.artifacts.model.LayerInfo;
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21
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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22 /**
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23 * This class iterates over a bunch of directories, searches for meta
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24 * information coresponding to shapefiles and creates a mapfile which is used by
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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25 * a <i>MapServer</i>.
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26 *
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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27 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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28 */
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29 public class MapfileGenerator
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30 extends Thread
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31 {
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32 public static final String WSPLGEN_RESULT_SHAPE = "wsplgen.shp";
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33 public static final String WSPLGEN_LINES_SHAPE = "barrier_lines.shp";
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34 public static final String WSPLGEN_POLYGONS_SHAPE = "barrier_polygons.shp";
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35
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36 public static final String MS_WSPLGEN_POSTFIX = "-wsplgen";
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37 public static final String MS_BARRIERS_POSTFIX = "-barriers";
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38 public static final String MS_LINE_POSTFIX = "-lines";
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39 public static final String MS_POLYGONS_POSTFIX = "-polygons";
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41 protected static final long SLEEPTIME = 10 * 1000L; // 10 seconds
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43 private static Logger logger = Logger.getLogger(MapfileGenerator.class);
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44
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45 private static MapfileGenerator instance;
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46
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47 private File mapfile;
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48 private File shapefileDirectory;
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49
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50 private String mapServerUrl;
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51 private String templatePath;
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52 private String velocityLogfile;
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53
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54 private VelocityEngine velocityEngine;
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55 private boolean lock[];
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59 private MapfileGenerator() {
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60 lock = new boolean[1];
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61 }
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62
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64 /**
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65 * A main method which can be used to create a mapfile without a running
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66 * artifact server.<br>
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67 * <b>NOTE:</b> This method is not implemented yet!
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68 *
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69 * @param args Arguments.
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70 */
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71 public static void main(String[] args) {
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72 throw new Error("MapfileGenerator.main() is CURRENTLY NOT IMPLEMENTED!");
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73 }
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76 /**
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77 * Returns the instance of this generator.
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78 *
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79 * @return the instance.
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80 */
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81 public static synchronized MapfileGenerator getInstance() {
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82 if (instance == null) {
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83 instance = new MapfileGenerator();
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84 instance.setDaemon(true);
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85 instance.start();
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86 }
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87
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88 return instance;
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89 }
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92 /**
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93 * Triggers the mapfile generation process.
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94 */
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95 public void update() {
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96 synchronized (lock) {
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97 logger.debug("update");
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98 lock[0] = true;
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99 lock.notify();
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100 }
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101 }
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104 /**
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105 * Thread to generate a mapfile.
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106 */
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107 @Override
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108 public void run() {
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109 logger.debug("Start MapfileGenerator thread...");
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110 try {
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111 for (;;) {
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112 synchronized (lock) {
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113 while (!lock[0]) {
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114 lock.wait(SLEEPTIME);
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115 }
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116 lock[0] = false;
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117 }
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118
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119 logger.debug("Start sync process now...");
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120 generate();
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121 }
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122 }
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123 catch (InterruptedException ie) {
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124 logger.debug("MapfileGenerator thread got an interrupt.");
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125 }
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126 catch (FileNotFoundException fnfe) {
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127 logger.debug("Error while mapfile creation: " + fnfe.getMessage());
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128 }
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129 finally {
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130 logger.debug("THREAD END");
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131 }
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132 }
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133
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134 /**
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135 * Method to check the existance of a template file.
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136 *
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137 * @param templateID The name of a template.
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138 * @return true, of the template exists - otherwise false.
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139 */
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140 public boolean templateExists(String templateID){
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141 Template template = getTemplateByName(templateID);
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142 return template != null;
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143 }
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144
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145
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146 /**
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147 * Method which starts searching for meta information file and mapfile
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148 * generation.
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149 */
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150 protected void generate()
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151 throws FileNotFoundException
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152 {
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153 File[] userDirs = getUserDirs();
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154 List<LayerInfo> layers = parseLayers(userDirs);
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155
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156 logger.info("Found " + layers.size() + " layers for user mapfile.");
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157
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158 writeMapfile(layers);
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159 }
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160
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161
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162 /**
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163 * Returns the VelocityEngine used for the template mechanism.
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164 *
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165 * @return the velocity engine.
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166 */
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167 protected VelocityEngine getVelocityEngine() {
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168 if (velocityEngine == null) {
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169 velocityEngine = new VelocityEngine();
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170 try {
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171 setupVelocity(velocityEngine);
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172 }
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173 catch (Exception e) {
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174 logger.error(e, e);
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175 return null;
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176 }
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177 }
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178 return velocityEngine;
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179 }
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180
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181
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182 /**
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183 * Initialize velocity.
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184 *
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185 * @param engine Velocity engine.
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186 * @throws Exception if an error occured while initializing velocity.
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187 */
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188 protected void setupVelocity(VelocityEngine engine)
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189 throws Exception
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190 {
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191 engine.setProperty(
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192 "input.encoding",
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193 "UTF-8");
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194
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195 engine.setProperty(
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196 VelocityEngine.RUNTIME_LOG,
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197 FLYSUtils.getXPathString(FLYSUtils.XPATH_VELOCITY_LOGFILE));
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198
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199 engine.setProperty(
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200 "resource.loader",
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201 "file");
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202
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203 engine.setProperty(
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204 "file.resource.loader.path",
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205 FLYSUtils.getXPathString(FLYSUtils.XPATH_MAPSERVER_TEMPLATE_PATH));
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206
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207 engine.init();
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208 }
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209
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210
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211 /**
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212 * Returns a template specified by <i>model</i>.
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213 *
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214 * @param model The name of the template.
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215 * @return a template.
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216 */
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217 protected Template getTemplateByName(String model) {
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218 if (model.indexOf(".vm") < 0) {
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219 model = model.concat(".vm");
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220 }
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221
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222 try {
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223 VelocityEngine engine = getVelocityEngine();
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224 if (engine == null) {
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225 logger.error("Error while fetching VelocityEngine.");
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226 return null;
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227 }
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228
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229 return engine.getTemplate(model);
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230 }
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231 catch (Exception e) {
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232 logger.warn(e, e);
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233 }
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234
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235 return null;
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236 }
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237
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238
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239 /**
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240 * Returns the mapfile template.
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241 *
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242 * @return the mapfile template.
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243 * @throws Exception if an error occured while reading the configuration.
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244 */
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245 protected Template getMapfileTemplate()
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246 throws Exception
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247 {
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248 String mapfileName = FLYSUtils.getXPathString(
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249 FLYSUtils.XPATH_MAPFILE_TEMPLATE);
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250
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251 return getTemplateByName(mapfileName);
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252 }
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253
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254
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255 /**
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256 * Returns the base directory storing the shapefiles.
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257 *
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258 * @return the shapefile base directory.
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259 *
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260 * @throws FileNotFoundException if no shapefile path is found or
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261 * configured.
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262 */
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263 protected File getShapefileBaseDir()
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264 throws FileNotFoundException
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265 {
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266 if (shapefileDirectory == null) {
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267 String path = FLYSUtils.getXPathString(
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268 FLYSUtils.XPATH_SHAPEFILE_DIR);
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269
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270 if (path != null) {
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271 shapefileDirectory = new File(path);
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272 }
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273
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274 if (shapefileDirectory == null || !shapefileDirectory.exists()) {
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275 throw new FileNotFoundException("No shapefile directory given");
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276 }
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277 }
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278
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279 return shapefileDirectory;
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280 }
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281
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282
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283 protected File[] getUserDirs()
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284 throws FileNotFoundException
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285 {
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286 File baseDir = getShapefileBaseDir();
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287 File[] artifactDirs = baseDir.listFiles();
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288
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289 // TODO ONLY RETURN DIRECTORIES OF THE SPECIFIED USER
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290
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291 return artifactDirs;
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292 }
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293
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294
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295
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296 protected List<LayerInfo> parseLayers(File[] dirs) {
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297 List<LayerInfo> layers = new ArrayList<LayerInfo>();
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298
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299 for (File dir: dirs) {
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300 LayerInfo layer = parseUeskLayer(dir);
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301 if (layer != null && layer.getData() != null) {
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302 logger.debug(" Add WSPLGEN layer.");
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303 layers.add(layer);
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304 }
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305
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306 List<LayerInfo> barriers = parseBarriersLayers(dir);
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307 int num = barriers != null ? barriers.size() : 0;
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308 if (num > 0) {
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309 if (barriers.get(0).getData() != null) {
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310 logger.debug(" Add " + num + " BARRIERS layers.");
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311 layers.addAll(barriers);
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312 }
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313 }
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314 }
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315
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316 return layers;
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317 }
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318
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319
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320 protected LayerInfo parseUeskLayer(File dir) {
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321 File uesk = new File(dir, WSPLGEN_RESULT_SHAPE);
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322
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323 if (!uesk.exists() || !uesk.isFile()) {
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324 return null;
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325 }
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326
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327 return new LayerInfo(
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328 dir.getName() + MS_WSPLGEN_POSTFIX,
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329 "POLYGON",
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330 dir.getName(),
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331 WSPLGEN_RESULT_SHAPE,
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332 "I18N_WSPLGEN_RESULT");
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333 }
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334
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335
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336 protected List<LayerInfo> parseBarriersLayers(File dir) {
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337 List<LayerInfo> barriers = new ArrayList<LayerInfo>(2);
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338
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339 String group = dir.getName() + MS_BARRIERS_POSTFIX;
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340 String groupTitle = "I18N_BARRIERS_TITLE";
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341
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342 File lines = new File(dir, WSPLGEN_LINES_SHAPE);
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343 File polygons = new File(dir, WSPLGEN_POLYGONS_SHAPE);
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344
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345 if (lines.exists() || lines.isFile()) {
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346 barriers.add(
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347 new LayerInfo(
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348 dir.getName() + MS_LINE_POSTFIX,
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349 "LINE",
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350 dir.getName(),
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351 WSPLGEN_LINES_SHAPE,
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352 "I18N_LINE_SHAPE",
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353 group,
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354 groupTitle));
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355 }
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356
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diff changeset
357 if (polygons.exists() || polygons.isFile()) {
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358 barriers.add(
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359 new LayerInfo(
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360 dir.getName() + MS_POLYGONS_POSTFIX,
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361 "POLYGON",
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362 dir.getName(),
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363 WSPLGEN_POLYGONS_SHAPE,
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364 "I18N_POLYGON_SHAPE",
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365 group,
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diff changeset
366 groupTitle));
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367 }
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368
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369 return barriers;
1129
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370 }
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371
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372
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373 /**
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374 * Creates a mapfile with the layer information stored in <i>layers</i>.
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375 *
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376 * @param layers Layer information.
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377 */
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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378 protected void writeMapfile(List<LayerInfo> layers) {
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379 String tmpMapName = "mapfile" + new Date().getTime();
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380
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381 File mapfile = new File(
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382 FLYSUtils.getXPathString(FLYSUtils.XPATH_MAPFILE_PATH));
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383
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384 File tmp = null;
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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385 Writer writer = null;
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diff changeset
386
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
387 try {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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388 tmp = new File(mapfile.getParent(), tmpMapName);
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389 tmp.createNewFile();
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390
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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391 writer = new FileWriter(tmp);
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392
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diff changeset
393 VelocityContext context = new VelocityContext();
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394 context.put("MAPSERVERURL",
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395 FLYSUtils.getXPathString(FLYSUtils.XPATH_MAPSERVER_URL));
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diff changeset
396 context.put("SHAPEFILEPATH",
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diff changeset
397 FLYSUtils.getXPathString(FLYSUtils.XPATH_SHAPEFILE_DIR));
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398 context.put("LAYERS", fillLayerTemplates(layers));
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diff changeset
399
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400 Template mapTemplate = getMapfileTemplate();
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diff changeset
401 if (mapTemplate == null) {
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402 logger.warn("No mapfile template found.");
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diff changeset
403 return;
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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404 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
405
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
406 mapTemplate.merge(context, writer);
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
407
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
408 // we need to create a temporary mapfile first und rename it into
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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409 // real mapfile because we don't run into race conditions on this
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410 // way. (iw)
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diff changeset
411 tmp.renameTo(mapfile);
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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412 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
413 catch (FileNotFoundException fnfe) {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
414 logger.error(fnfe, fnfe);
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415 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
416 catch (IOException ioe) {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
417 logger.error(ioe, ioe);
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418 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
419 catch (Exception e) {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
420 logger.error(e, e);
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
421 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
422 finally {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
423 try {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
424 if (writer != null) {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
425 writer.close();
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
426 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
427
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
428 if (tmp.exists()) {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
429 tmp.delete();
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
430 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
431 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
432 catch (IOException ioe) {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
433 logger.debug(ioe, ioe);
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diff changeset
434 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
435 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
436 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
437
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
438
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
439 protected List<String> fillLayerTemplates(List<LayerInfo> layers) {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
440 List<String> evaluated = new ArrayList<String>(layers.size());
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
441
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
442 for (LayerInfo layer: layers) {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
443 StringWriter writer = new StringWriter();
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
444
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
445 VelocityContext context = new VelocityContext();
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
446 context.put("LAYER", layer);
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
447
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
448 Template t = getTemplateByName("layer.vm");
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
449 if (t == null) {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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diff changeset
450 logger.warn("No 'layer.vm' template found.");
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
451 return evaluated;
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
452 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
453
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
454 t.merge(context, writer);
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
455
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
456 evaluated.add(writer.toString());
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
457 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
458
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
459 return evaluated;
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
460 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
461 }
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
462 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org