Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/utils/MapfileGenerator.java @ 9751:308a0d822d18 3.2.x

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Keep configuration and data in distinct directories This allows having distinct volumes for configuration and data (artifact database, generated mapfiles and shapefiles, etc.). While at it, cleanup MapServer configuration a little bit.
author Tom Gottfried <tom@intevation.de>
date Tue, 11 Oct 2022 11:42:09 +0200
parents afad1fac70fb
children
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
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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.logging.log4j.Logger;
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25 import org.apache.logging.log4j.LogManager;
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26 import org.apache.velocity.Template;
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27 import org.apache.velocity.VelocityContext;
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28 import org.apache.velocity.app.VelocityEngine;
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29 import org.apache.velocity.runtime.RuntimeConstants;
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30
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31 /**
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32 * This class iterates over a bunch of directories, searches for meta
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33 * information coresponding to shapefiles and creates a mapfile which is used by
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34 * a <i>MapServer</i>.
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35 *
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36 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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37 */
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38 public abstract class MapfileGenerator
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39 {
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40 private static final String XPATH_MAPSERVER_TEMPLATES_PATH =
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41 "/artifact-database/mapserver/templates/@path";
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42
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43 public static final String WSPLGEN_RESULT_SHAPE = "wsplgen.shp";
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44 public static final String WSPLGEN_LINES_SHAPE = "barrier_lines.shp";
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45 public static final String WSPLGEN_POLYGONS_SHAPE = "barrier_polygons.shp";
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46 public static final String WSPLGEN_USER_SHAPE = "user-rgd.shp";
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47
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48 public static final String WSPLGEN_LAYER_TEMPLATE = "wsplgen_layer.vm";
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49 public static final String SHP_LAYER_TEMPLATE = "shapefile_layer.vm";
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50 public static final String DB_LAYER_TEMPLATE = "db_layer.vm";
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51 public static final String RIVERAXIS_LAYER_TEMPLATE = "riveraxis-layer.vm";
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52
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53 public static final String MS_WSPLGEN_PREFIX = "wsplgen-";
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54 public static final String MS_BARRIERS_PREFIX = "barriers-";
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55 public static final String MS_LINE_PREFIX = "lines-";
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56 public static final String MS_POLYGONS_PREFIX = "polygons-";
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57 public static final String MS_LAYER_PREFIX = "ms_layer-";
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58 public static final String MS_USERSHAPE_PREFIX = "user-";
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59
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60 private static Logger log = LogManager.getLogger(MapfileGenerator.class);
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61
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62 private File shapefileDirectory;
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63
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64 private VelocityEngine velocityEngine;
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65
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66
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67 protected MapfileGenerator() {
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68 }
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71 /**
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72 * Method to check the existance of a template file.
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73 *
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74 * @param templateID The name of a template.
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75 * @return true, of the template exists - otherwise false.
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76 */
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77 public boolean templateExists(String templateID){
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78 Template template = getTemplateByName(templateID);
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79 return template != null;
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80 }
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81
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82
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83 public abstract void generate() throws Exception;
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84
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85
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86 /**
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87 * Returns the VelocityEngine used for the template mechanism.
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88 *
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89 * @return the velocity engine.
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90 */
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91 protected VelocityEngine getVelocityEngine() {
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92 if (velocityEngine == null) {
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93 velocityEngine = new VelocityEngine();
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94 try {
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95 setupVelocity(velocityEngine);
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96 }
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97 catch (Exception e) {
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98 log.error(e, e);
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99 return null;
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100 }
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101 }
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102 return velocityEngine;
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103 }
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106 /**
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107 * Initialize velocity.
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108 *
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109 * @param engine Velocity engine.
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110 * @throws Exception if an error occured while initializing velocity.
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111 */
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112 protected void setupVelocity(VelocityEngine engine)
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113 throws Exception
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114 {
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115 engine.setProperty(
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116 "input.encoding",
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117 "UTF-8");
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118
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119 engine.setProperty(
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120 RuntimeConstants.RUNTIME_LOG,
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121 getVelocityLogfile());
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122
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123 engine.setProperty(
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124 "resource.loader",
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125 "file");
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126
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127 engine.setProperty(
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128 "file.resource.loader.path",
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129 RiverUtils.getXPathString(XPATH_MAPSERVER_TEMPLATES_PATH)
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130 );
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131
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132 engine.init();
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133 }
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134
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135 protected abstract String getVelocityLogfile();
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136
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137 protected VelocityContext getVelocityContext() {
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138 VelocityContext context = new VelocityContext();
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139
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140 try {
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141 context.put("SHAPEFILEPATH",
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142 getShapefileBaseDir().getCanonicalPath());
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143 context.put("CONFIGDIR",
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144 Config.getConfigDirectory().getCanonicalPath());
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145 }
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146 catch (FileNotFoundException fnfe) {
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147 // this is bad
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148 log.warn(fnfe, fnfe);
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149 }
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150 catch (IOException ioe) {
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151 // this is also bad
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152 log.warn(ioe, ioe);
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153 }
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154
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155 return context;
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156 }
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157
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158
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159 /**
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160 * Returns a template specified by <i>model</i>.
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161 *
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162 * @param model The name of the template.
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163 * @return a template.
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164 */
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165 public Template getTemplateByName(String model) {
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166 if (model.indexOf(".vm") < 0) {
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167 model = model.concat(".vm");
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168 }
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169
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170 try {
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171 VelocityEngine engine = getVelocityEngine();
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172 if (engine == null) {
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173 log.error("Error while fetching VelocityEngine.");
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174 return null;
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175 }
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176
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177 return engine.getTemplate(model);
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178 }
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179 catch (Exception e) {
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180 log.warn(e, e);
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181 }
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182
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183 return null;
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184 }
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185
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186
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187 /**
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188 * Returns the mapfile template.
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189 *
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190 * @return the mapfile template.
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191 * @throws Exception if an error occured while reading the configuration.
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192 */
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193 protected Template getMapfileTemplateObj()
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194 throws Exception
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195 {
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196 String mapfileName = getMapfileTemplate();
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197 return getTemplateByName(mapfileName);
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198 }
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199
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200 protected abstract String getMapfilePath();
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201
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202 protected abstract String getMapfileTemplate();
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203
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204
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205 /**
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206 * Returns the base directory storing the shapefiles.
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207 *
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208 * @return the shapefile base directory.
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209 *
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210 * @throws FileNotFoundException if no shapefile path is found or
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211 * configured.
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212 */
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213 public File getShapefileBaseDir()
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214 throws FileNotFoundException, IOException
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215 {
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216 if (shapefileDirectory == null) {
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217 String path = RiverUtils.getXPathString(
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218 RiverUtils.XPATH_MAPFILES_PATH);
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219
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220 if (path != null) {
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221 shapefileDirectory = new File(path);
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222 }
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223
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224 if (shapefileDirectory == null) {
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225 throw new FileNotFoundException("No shapefile directory given");
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226 }
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227
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228 if (!shapefileDirectory.exists()) {
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229 shapefileDirectory.mkdirs();
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230 }
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231 }
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232
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233 return shapefileDirectory;
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234 }
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235
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236
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237 protected File[] getUserDirs()
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238 throws FileNotFoundException, IOException
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239 {
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240 File baseDir = getShapefileBaseDir();
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241 File[] artifactDirs = baseDir.listFiles();
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242
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243 // TODO ONLY RETURN DIRECTORIES OF THE SPECIFIED USER
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244
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245 return artifactDirs;
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246 }
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247
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248
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249 protected List<String> parseLayers(File[] dirs) {
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250 List<String> layers = new ArrayList<String>();
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251
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252 for (File dir: dirs) {
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253 File[] layerFiles = dir.listFiles(new FilenameFilter() {
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254 @Override
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255 public boolean accept(File directory, String name) {
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256 return name.startsWith(MS_LAYER_PREFIX);
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257 }
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258 });
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259
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Andre Heinecke <aheinecke@intevation.de>
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260 if (layerFiles == null) {
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261 continue;
81ae2a4873f2 Do not NPE if there is a folder without mapfiles in the shapefile path
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262 }
81ae2a4873f2 Do not NPE if there is a folder without mapfiles in the shapefile path
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263
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264 for (File layer: layerFiles) {
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265 try {
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266 layers.add(layer.getCanonicalPath());
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267 }
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268 catch (IOException ioe) {
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269 log.warn(ioe, ioe);
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270 }
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271 }
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272 }
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273
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274 return layers;
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275 }
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276
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277
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278 /**
1781
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279 * Creates a layer snippet which might be included in the mapfile.
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280 *
8747
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281 * @param layerInfo A LayerInfo object that contains all necessary
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282 * information to build a Mapserver LAYER section.
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283 * @param layerFile The file that is written.
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284 * @param tpl The Velocity template which is used to create the LAYER
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285 * section.
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286 */
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287 public void writeLayer(
4656
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288 LayerInfo layerInfo,
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289 File layerFile,
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290 Template tpl
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291 )
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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292 throws FileNotFoundException
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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293 {
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294 if (log.isDebugEnabled()) {
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295 log.debug("Write layer for:");
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296 log.debug(" directory/file: " + layerFile.getName());
1775
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297 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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298
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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299 Writer writer = null;
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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300
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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diff changeset
301 try {
4656
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diff changeset
302 writer = new FileWriter(layerFile);
1775
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303
1792
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parents: 1781
diff changeset
304 VelocityContext context = getVelocityContext();
4656
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diff changeset
305 context.put("LAYER", layerInfo);
1775
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diff changeset
306
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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diff changeset
307 tpl.merge(context, writer);
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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diff changeset
308 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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diff changeset
309 catch (FileNotFoundException fnfe) {
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310 log.error(fnfe, fnfe);
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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 catch (IOException ioe) {
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313 log.error(ioe, ioe);
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314 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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parents: 1710
diff changeset
315 catch (Exception e) {
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diff changeset
316 log.error(e, e);
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317 }
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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parents: 1710
diff changeset
318 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
319 try {
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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parents: 1710
diff changeset
320 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
321 writer.close();
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
322 }
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
323 }
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
324 catch (IOException ioe) {
8202
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parents: 7655
diff changeset
325 log.debug(ioe, ioe);
1775
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 }
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
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.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1710
diff changeset
329
0156105222c9 Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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parents: 1710
diff changeset
330
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parents:
diff changeset
331 /**
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
332 * 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.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
333 *
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
334 * @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
335 */
5309
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Raimund Renkert <rrenkert@intevation.de>
parents: 4703
diff changeset
336 public void writeMapfile(List<String> layers) {
1129
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parents:
diff changeset
337 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
338
4656
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Christian Lins <christian.lins@intevation.de>
parents: 4654
diff changeset
339 File mapfile = new File(getMapfilePath());
1129
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parents:
diff changeset
340
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
341 File tmp = null;
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
342 Writer writer = null;
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
343
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
344 try {
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
diff changeset
345 tmp = new File(mapfile.getParent(), tmpMapName);
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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parents:
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346 tmp.createNewFile();
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347
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348 writer = new FileWriter(tmp);
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349
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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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350 VelocityContext context = getVelocityContext();
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351 context.put("LAYERS", layers);
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352
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353 Template mapTemplate = getMapfileTemplateObj();
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354 if (mapTemplate == null) {
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355 log.warn("No mapfile template found.");
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356 return;
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357 }
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358
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359 mapTemplate.merge(context, writer);
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360
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361 // we need to create a temporary mapfile first und rename it into
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362 // real mapfile because we don't run into race conditions on this
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363 // way. (iw)
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364 tmp.renameTo(mapfile);
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365 }
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366 catch (FileNotFoundException fnfe) {
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367 log.error(fnfe, fnfe);
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368 }
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369 catch (IOException ioe) {
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370 log.error(ioe, ioe);
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371 }
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372 catch (Exception e) {
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373 log.error(e, e);
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374 }
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375 finally {
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376 try {
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377 if (writer != null) {
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378 writer.close();
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379 }
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380
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381 if (tmp.exists()) {
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382 tmp.delete();
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383 }
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384 }
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385 catch (IOException ioe) {
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386 log.debug(ioe, ioe);
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387 }
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388 }
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389 }
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390 }
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391 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org