Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/utils/MapfileGenerator.java @ 8202:e4606eae8ea5

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sed src/**/*.java 's/logger/log/g'
author Sascha L. Teichmann <teichmann@intevation.de>
date Fri, 05 Sep 2014 12:58:17 +0200
parents 81ae2a4873f2
children e9d912c97fa8
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.utils;
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10
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11 import org.dive4elements.artifacts.common.utils.Config;
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12 import org.dive4elements.river.artifacts.model.LayerInfo;
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13
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14 import java.io.File;
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15 import java.io.FileNotFoundException;
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16 import java.io.FileWriter;
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17 import java.io.FilenameFilter;
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18 import java.io.IOException;
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19 import java.io.Writer;
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20 import java.util.ArrayList;
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21 import java.util.Date;
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22 import java.util.List;
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23
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24 import org.apache.log4j.Logger;
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25 import org.apache.velocity.Template;
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26 import org.apache.velocity.VelocityContext;
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27 import org.apache.velocity.app.VelocityEngine;
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28 import org.apache.velocity.runtime.RuntimeConstants;
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29
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30 /**
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31 * This class iterates over a bunch of directories, searches for meta
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32 * information coresponding to shapefiles and creates a mapfile which is used by
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33 * a <i>MapServer</i>.
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34 *
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35 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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36 */
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37 public abstract class MapfileGenerator
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38 {
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39 public static final String WSPLGEN_RESULT_SHAPE = "wsplgen.shp";
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40 public static final String WSPLGEN_LINES_SHAPE = "barrier_lines.shp";
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41 public static final String WSPLGEN_POLYGONS_SHAPE = "barrier_polygons.shp";
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42 public static final String WSPLGEN_USER_SHAPE = "user-rgd.shp";
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43
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44 public static final String WSPLGEN_LAYER_TEMPLATE = "wsplgen_layer.vm";
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45 public static final String SHP_LAYER_TEMPLATE = "shapefile_layer.vm";
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46 public static final String DB_LAYER_TEMPLATE = "db_layer.vm";
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47 public static final String RIVERAXIS_LAYER_TEMPLATE = "riveraxis-layer.vm";
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48
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49 public static final String MS_WSPLGEN_PREFIX = "wsplgen-";
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50 public static final String MS_BARRIERS_PREFIX = "barriers-";
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51 public static final String MS_LINE_PREFIX = "lines-";
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52 public static final String MS_POLYGONS_PREFIX = "polygons-";
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53 public static final String MS_LAYER_PREFIX = "ms_layer-";
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54 public static final String MS_USERSHAPE_PREFIX = "user-";
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55
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56 private static Logger log = Logger.getLogger(MapfileGenerator.class);
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57
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58 private File shapefileDirectory;
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59
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60 private VelocityEngine velocityEngine;
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61
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62
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63 protected MapfileGenerator() {
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64 }
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65
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66
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67 /**
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68 * Method to check the existance of a template file.
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69 *
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70 * @param templateID The name of a template.
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71 * @return true, of the template exists - otherwise false.
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72 */
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73 public boolean templateExists(String templateID){
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74 Template template = getTemplateByName(templateID);
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75 return template != null;
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76 }
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77
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78
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79 public abstract void generate() throws Exception;
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80
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81
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82 /**
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83 * Returns the VelocityEngine used for the template mechanism.
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84 *
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85 * @return the velocity engine.
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86 */
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87 protected VelocityEngine getVelocityEngine() {
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88 if (velocityEngine == null) {
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89 velocityEngine = new VelocityEngine();
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90 try {
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91 setupVelocity(velocityEngine);
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92 }
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93 catch (Exception e) {
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94 log.error(e, e);
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95 return null;
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96 }
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97 }
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98 return velocityEngine;
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99 }
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102 /**
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103 * Initialize velocity.
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104 *
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105 * @param engine Velocity engine.
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106 * @throws Exception if an error occured while initializing velocity.
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107 */
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108 protected void setupVelocity(VelocityEngine engine)
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109 throws Exception
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110 {
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111 engine.setProperty(
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112 "input.encoding",
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113 "UTF-8");
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114
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115 engine.setProperty(
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116 RuntimeConstants.RUNTIME_LOG,
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117 getVelocityLogfile());
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118
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119 engine.setProperty(
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120 "resource.loader",
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121 "file");
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122
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123 engine.setProperty(
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124 "file.resource.loader.path",
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125 getMapserverTemplatePath());
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126
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127 engine.init();
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128 }
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129
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130 protected abstract String getVelocityLogfile();
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131
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132 protected abstract String getMapserverTemplatePath();
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133
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134 public abstract String getMapserverUrl();
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135
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136 protected VelocityContext getVelocityContext() {
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137 VelocityContext context = new VelocityContext();
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138
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139 try {
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140 context.put("MAPSERVERURL",
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141 getMapserverUrl());
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142 context.put("SHAPEFILEPATH",
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143 getShapefileBaseDir().getCanonicalPath());
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144 context.put("CONFIGDIR",
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145 Config.getConfigDirectory().getCanonicalPath());
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146 }
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147 catch (FileNotFoundException fnfe) {
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148 // this is bad
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149 log.warn(fnfe, fnfe);
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150 }
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151 catch (IOException ioe) {
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152 // this is also bad
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153 log.warn(ioe, ioe);
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154 }
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155
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156 return context;
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157 }
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158
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159
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160 /**
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161 * Returns a template specified by <i>model</i>.
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162 *
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163 * @param model The name of the template.
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164 * @return a template.
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165 */
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166 public Template getTemplateByName(String model) {
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167 if (model.indexOf(".vm") < 0) {
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168 model = model.concat(".vm");
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169 }
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170
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171 try {
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172 VelocityEngine engine = getVelocityEngine();
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173 if (engine == null) {
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174 log.error("Error while fetching VelocityEngine.");
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175 return null;
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176 }
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177
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178 return engine.getTemplate(model);
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179 }
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180 catch (Exception e) {
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181 log.warn(e, e);
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182 }
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183
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184 return null;
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185 }
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186
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187
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188 /**
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189 * Returns the mapfile template.
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190 *
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191 * @return the mapfile template.
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192 * @throws Exception if an error occured while reading the configuration.
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193 */
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194 protected Template getMapfileTemplateObj()
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195 throws Exception
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196 {
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197 String mapfileName = getMapfileTemplate();
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198 return getTemplateByName(mapfileName);
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199 }
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200
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201 protected abstract String getMapfilePath();
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202
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203 protected abstract String getMapfileTemplate();
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204
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205
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206 /**
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207 * Returns the base directory storing the shapefiles.
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208 *
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209 * @return the shapefile base directory.
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210 *
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211 * @throws FileNotFoundException if no shapefile path is found or
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212 * configured.
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213 */
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214 public File getShapefileBaseDir()
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215 throws FileNotFoundException, IOException
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216 {
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217 if (shapefileDirectory == null) {
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218 String path = RiverUtils.getXPathString(
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219 RiverUtils.XPATH_FLOODMAP_SHAPEFILE_DIR);
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220
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221 if (path != null) {
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222 shapefileDirectory = new File(path);
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223 }
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224
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225 if (shapefileDirectory == null) {
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226 throw new FileNotFoundException("No shapefile directory given");
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227 }
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228
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229 if (!shapefileDirectory.exists()) {
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230 shapefileDirectory.mkdirs();
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231 }
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232 }
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233
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234 return shapefileDirectory;
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235 }
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236
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237
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238 protected File[] getUserDirs()
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239 throws FileNotFoundException, IOException
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240 {
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241 File baseDir = getShapefileBaseDir();
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242 File[] artifactDirs = baseDir.listFiles();
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243
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244 // TODO ONLY RETURN DIRECTORIES OF THE SPECIFIED USER
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245
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246 return artifactDirs;
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247 }
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248
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249
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250
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251 protected List<String> parseLayers(File[] dirs) {
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252 List<String> layers = new ArrayList<String>();
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253
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254 for (File dir: dirs) {
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255 File[] layerFiles = dir.listFiles(new FilenameFilter() {
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256 @Override
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257 public boolean accept(File directory, String name) {
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258 return name.startsWith(MS_LAYER_PREFIX);
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259 }
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260 });
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261
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262 if (layerFiles == null) {
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263 continue;
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264 }
81ae2a4873f2 Do not NPE if there is a folder without mapfiles in the shapefile path
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265
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266 for (File layer: layerFiles) {
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267 try {
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268 layers.add(layer.getCanonicalPath());
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269 }
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270 catch (IOException ioe) {
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271 log.warn(ioe, ioe);
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272 }
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273 }
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274 }
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275
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276 return layers;
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277 }
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278
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279
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280
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281
49ad801076e4 Enabled the MapGenerator to create WMS layers with database datastore - riveraxis is the first layer that is no longer fetched from static WMS service but from user specific one.
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282 /**
1781
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283 * Creates a layer snippet which might be included in the mapfile.
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284 *
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285 * @param layerinfo A LayerInfo object that contains all necessary
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286 * information to build a Mapserver LAYER section.
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287 * @param dir The base dir for the LAYER snippet.
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288 * @param filename The name of the file that is written.
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289 * @param tpl The Velocity template which is used to create the LAYER
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290 * section.
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291 */
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292 public void writeLayer(
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293 LayerInfo layerInfo,
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294 File layerFile,
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295 Template tpl
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296 )
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297 throws FileNotFoundException
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298 {
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299 if (log.isDebugEnabled()) {
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300 log.debug("Write layer for:");
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301 log.debug(" directory/file: " + layerFile.getName());
1775
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302 }
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303
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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304 Writer writer = null;
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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305
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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diff changeset
306 try {
4656
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diff changeset
307 writer = new FileWriter(layerFile);
1775
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308
1792
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diff changeset
309 VelocityContext context = getVelocityContext();
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diff changeset
310 context.put("LAYER", layerInfo);
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311
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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diff changeset
312 tpl.merge(context, writer);
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313 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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diff changeset
314 catch (FileNotFoundException fnfe) {
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315 log.error(fnfe, fnfe);
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316 }
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diff changeset
317 catch (IOException ioe) {
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318 log.error(ioe, ioe);
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319 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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diff changeset
320 catch (Exception e) {
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321 log.error(e, e);
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322 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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diff changeset
323 finally {
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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parents: 1710
diff changeset
324 try {
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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diff changeset
325 if (writer != null) {
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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parents: 1710
diff changeset
326 writer.close();
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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parents: 1710
diff changeset
327 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1710
diff changeset
328 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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parents: 1710
diff changeset
329 catch (IOException ioe) {
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diff changeset
330 log.debug(ioe, ioe);
1775
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diff changeset
331 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1710
diff changeset
332 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1710
diff changeset
333 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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parents: 1710
diff changeset
334
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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diff changeset
335
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parents:
diff changeset
336 /**
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
337 * Creates a mapfile with the layer information stored in <i>layers</i>.
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
338 *
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
339 * @param layers Layer information.
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
340 */
5309
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Raimund Renkert <rrenkert@intevation.de>
parents: 4703
diff changeset
341 public void writeMapfile(List<String> layers) {
1129
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parents:
diff changeset
342 String tmpMapName = "mapfile" + new Date().getTime();
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
343
4656
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Christian Lins <christian.lins@intevation.de>
parents: 4654
diff changeset
344 File mapfile = new File(getMapfilePath());
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345
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346 File tmp = null;
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347 Writer writer = null;
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348
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349 try {
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350 tmp = new File(mapfile.getParent(), tmpMapName);
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351 tmp.createNewFile();
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352
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353 writer = new FileWriter(tmp);
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354
1792
49ad801076e4 Enabled the MapGenerator to create WMS layers with database datastore - riveraxis is the first layer that is no longer fetched from static WMS service but from user specific one.
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355 VelocityContext context = getVelocityContext();
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356 context.put("LAYERS", layers);
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357
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358 Template mapTemplate = getMapfileTemplateObj();
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359 if (mapTemplate == null) {
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360 log.warn("No mapfile template found.");
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361 return;
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362 }
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363
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364 mapTemplate.merge(context, writer);
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365
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366 // we need to create a temporary mapfile first und rename it into
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367 // real mapfile because we don't run into race conditions on this
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368 // way. (iw)
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369 tmp.renameTo(mapfile);
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370 }
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371 catch (FileNotFoundException fnfe) {
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372 log.error(fnfe, fnfe);
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373 }
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374 catch (IOException ioe) {
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375 log.error(ioe, ioe);
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376 }
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377 catch (Exception e) {
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378 log.error(e, e);
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379 }
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380 finally {
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381 try {
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382 if (writer != null) {
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383 writer.close();
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384 }
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385
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386 if (tmp.exists()) {
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387 tmp.delete();
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388 }
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389 }
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390 catch (IOException ioe) {
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391 log.debug(ioe, ioe);
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392 }
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393 }
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394 }
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395 }
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396 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org