Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/utils/MapfileGenerator.java @ 5201:48d1b12b9fc6
Added tag 2.9.11 for changeset 42bb6ff78d1b
author | Raimund Renkert <rrenkert@intevation.de> |
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date | Fri, 08 Mar 2013 12:33:07 +0100 |
parents | 38ec171544de |
children | b55975761708 |
rev | line source |
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1129
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Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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1 package de.intevation.flys.utils; |
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Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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2 |
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3 import de.intevation.artifacts.common.utils.Config; |
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4 import de.intevation.flys.artifacts.model.LayerInfo; |
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5 |
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Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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6 import java.io.File; |
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7 import java.io.FileNotFoundException; |
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8 import java.io.FileWriter; |
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Organized and added missing imports.
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9 import java.io.FilenameFilter; |
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Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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10 import java.io.IOException; |
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11 import java.io.Writer; |
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Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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12 import java.util.ArrayList; |
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13 import java.util.Date; |
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14 import java.util.List; |
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15 |
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Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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16 import org.apache.log4j.Logger; |
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17 import org.apache.velocity.Template; |
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18 import org.apache.velocity.VelocityContext; |
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19 import org.apache.velocity.app.VelocityEngine; |
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20 import org.apache.velocity.runtime.RuntimeConstants; |
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21 |
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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 |
da3c3e286c88
Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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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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Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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26 * |
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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> |
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28 */ |
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Refactor Mapserver mapfile generation.
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29 public abstract class MapfileGenerator |
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Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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30 { |
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Read barrier layers from filesystem while mapfile creation and build a facet for this layer in the artifact.
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31 public static final String WSPLGEN_RESULT_SHAPE = "wsplgen.shp"; |
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32 public static final String WSPLGEN_LINES_SHAPE = "barrier_lines.shp"; |
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33 public static final String WSPLGEN_POLYGONS_SHAPE = "barrier_polygons.shp"; |
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Issue 657.
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34 public static final String WSPLGEN_USER_SHAPE = "user-rgd.shp"; |
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Read barrier layers from filesystem while mapfile creation and build a facet for this layer in the artifact.
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35 |
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Issue 560.
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36 public static final String WSPLGEN_LAYER_TEMPLATE = "wsplgen_layer.vm"; |
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Improved the MapfileGenerator. It offers methods to create barrier and wsplgen layer files for mapserver.
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37 public static final String SHP_LAYER_TEMPLATE = "shapefile_layer.vm"; |
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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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38 public static final String DB_LAYER_TEMPLATE = "db_layer.vm"; |
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Work on river axis mapfile generator.
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39 public static final String RIVERAXIS_LAYER_TEMPLATE = "riveraxis-layer.vm"; |
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40 |
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41 public static final String MS_WSPLGEN_PREFIX = "wsplgen-"; |
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42 public static final String MS_BARRIERS_PREFIX = "barriers-"; |
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43 public static final String MS_LINE_PREFIX = "lines-"; |
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44 public static final String MS_POLYGONS_PREFIX = "polygons-"; |
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45 public static final String MS_LAYER_PREFIX = "ms_layer-"; |
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46 public static final String MS_USERSHAPE_PREFIX = "user-"; |
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47 |
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48 private static Logger logger = Logger.getLogger(MapfileGenerator.class); |
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49 |
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50 private File shapefileDirectory; |
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51 |
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52 private VelocityEngine velocityEngine; |
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53 |
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54 |
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55 protected MapfileGenerator() { |
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56 } |
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57 |
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58 |
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59 /** |
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60 * Method to check the existance of a template file. |
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61 * |
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62 * @param templateID The name of a template. |
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63 * @return true, of the template exists - otherwise false. |
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64 */ |
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65 public boolean templateExists(String templateID){ |
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66 Template template = getTemplateByName(templateID); |
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67 return template != null; |
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68 } |
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69 |
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70 |
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71 public abstract void generate() throws Exception; |
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72 |
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73 |
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74 /** |
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75 * Returns the VelocityEngine used for the template mechanism. |
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76 * |
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77 * @return the velocity engine. |
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78 */ |
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79 protected VelocityEngine getVelocityEngine() { |
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80 if (velocityEngine == null) { |
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81 velocityEngine = new VelocityEngine(); |
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82 try { |
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83 setupVelocity(velocityEngine); |
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84 } |
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85 catch (Exception e) { |
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86 logger.error(e, e); |
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87 return null; |
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88 } |
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89 } |
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90 return velocityEngine; |
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91 } |
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92 |
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93 |
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94 /** |
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95 * Initialize velocity. |
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96 * |
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97 * @param engine Velocity engine. |
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98 * @throws Exception if an error occured while initializing velocity. |
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99 */ |
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100 protected void setupVelocity(VelocityEngine engine) |
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101 throws Exception |
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102 { |
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103 engine.setProperty( |
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104 "input.encoding", |
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105 "UTF-8"); |
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106 |
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107 engine.setProperty( |
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108 RuntimeConstants.RUNTIME_LOG, |
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109 getVelocityLogfile()); |
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110 |
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111 engine.setProperty( |
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112 "resource.loader", |
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113 "file"); |
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114 |
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115 engine.setProperty( |
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116 "file.resource.loader.path", |
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117 getMapserverTemplatePath()); |
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118 |
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119 engine.init(); |
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120 } |
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121 |
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122 protected abstract String getVelocityLogfile(); |
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123 |
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124 protected abstract String getMapserverTemplatePath(); |
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125 |
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126 protected abstract String getMapserverUrl(); |
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127 |
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128 protected VelocityContext getVelocityContext() { |
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129 VelocityContext context = new VelocityContext(); |
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130 |
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131 try { |
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132 context.put("MAPSERVERURL", |
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133 getMapserverUrl()); |
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134 context.put("SHAPEFILEPATH", |
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135 getShapefileBaseDir().getCanonicalPath()); |
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136 context.put("CONFIGDIR", |
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137 Config.getConfigDirectory().getCanonicalPath()); |
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138 } |
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139 catch (FileNotFoundException fnfe) { |
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140 // this is bad |
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141 logger.warn(fnfe, fnfe); |
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142 } |
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143 catch (IOException ioe) { |
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144 // this is also bad |
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145 logger.warn(ioe, ioe); |
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146 } |
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147 |
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148 return context; |
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149 } |
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150 |
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151 |
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152 /** |
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153 * Returns a template specified by <i>model</i>. |
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154 * |
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155 * @param model The name of the template. |
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156 * @return a template. |
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157 */ |
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158 protected Template getTemplateByName(String model) { |
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159 if (model.indexOf(".vm") < 0) { |
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160 model = model.concat(".vm"); |
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161 } |
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162 |
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163 try { |
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164 VelocityEngine engine = getVelocityEngine(); |
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165 if (engine == null) { |
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166 logger.error("Error while fetching VelocityEngine."); |
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167 return null; |
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168 } |
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169 |
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170 return engine.getTemplate(model); |
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171 } |
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172 catch (Exception e) { |
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173 logger.warn(e, e); |
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174 } |
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175 |
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176 return null; |
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177 } |
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178 |
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179 |
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180 /** |
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181 * Returns the mapfile template. |
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182 * |
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183 * @return the mapfile template. |
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184 * @throws Exception if an error occured while reading the configuration. |
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185 */ |
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186 protected Template getMapfileTemplateObj() |
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187 throws Exception |
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188 { |
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189 String mapfileName = getMapfileTemplate(); |
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190 return getTemplateByName(mapfileName); |
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191 } |
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192 |
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193 protected abstract String getMapfilePath(); |
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194 |
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195 protected abstract String getMapfileTemplate(); |
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196 |
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197 |
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198 /** |
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199 * Returns the base directory storing the shapefiles. |
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200 * |
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201 * @return the shapefile base directory. |
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202 * |
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203 * @throws FileNotFoundException if no shapefile path is found or |
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204 * configured. |
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205 */ |
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206 public File getShapefileBaseDir() |
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207 throws FileNotFoundException, IOException |
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208 { |
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209 if (shapefileDirectory == null) { |
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210 String path = FLYSUtils.getXPathString( |
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211 FLYSUtils.XPATH_FLOODMAP_SHAPEFILE_DIR); |
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212 |
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213 if (path != null) { |
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214 shapefileDirectory = new File(path); |
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215 } |
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216 |
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217 if (shapefileDirectory == null) { |
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218 throw new FileNotFoundException("No shapefile directory given"); |
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219 } |
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220 |
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221 if (!shapefileDirectory.exists()) { |
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222 shapefileDirectory.mkdirs(); |
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223 } |
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224 } |
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225 |
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226 return shapefileDirectory; |
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227 } |
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228 |
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229 |
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230 protected File[] getUserDirs() |
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231 throws FileNotFoundException, IOException |
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232 { |
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233 File baseDir = getShapefileBaseDir(); |
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234 File[] artifactDirs = baseDir.listFiles(); |
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235 |
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236 // TODO ONLY RETURN DIRECTORIES OF THE SPECIFIED USER |
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237 |
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238 return artifactDirs; |
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239 } |
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240 |
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241 |
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242 |
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243 protected List<String> parseLayers(File[] dirs) { |
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244 List<String> layers = new ArrayList<String>(); |
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245 |
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246 for (File dir: dirs) { |
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247 File[] layerFiles = dir.listFiles(new FilenameFilter() { |
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248 @Override |
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249 public boolean accept(File directory, String name) { |
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250 return name.startsWith(MS_LAYER_PREFIX); |
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251 } |
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252 }); |
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253 |
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254 for (File layer: layerFiles) { |
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255 try { |
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256 layers.add(layer.getCanonicalPath()); |
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257 } |
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258 catch (IOException ioe) { |
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259 logger.warn(ioe, ioe); |
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260 } |
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261 } |
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262 } |
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263 |
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264 return layers; |
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265 } |
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266 |
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267 |
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268 |
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269 |
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270 /** |
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271 * Creates a layer snippet which might be included in the mapfile. |
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272 * |
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273 * @param layerinfo A LayerInfo object that contains all necessary |
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274 * information to build a Mapserver LAYER section. |
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275 * @param dir The base dir for the LAYER snippet. |
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276 * @param filename The name of the file that is written. |
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277 * @param tpl The Velocity template which is used to create the LAYER |
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278 * section. |
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279 */ |
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280 protected void writeLayer( |
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281 LayerInfo layerInfo, |
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282 File layerFile, |
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283 Template tpl |
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284 ) |
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285 throws FileNotFoundException |
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286 { |
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287 if (logger.isDebugEnabled()) { |
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288 logger.debug("Write layer for:"); |
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289 logger.debug(" directory/file: " + layerFile.getName()); |
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290 } |
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291 |
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292 Writer writer = null; |
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293 |
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294 try { |
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295 writer = new FileWriter(layerFile); |
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296 |
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297 VelocityContext context = getVelocityContext(); |
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298 context.put("LAYER", layerInfo); |
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299 |
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300 tpl.merge(context, writer); |
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301 } |
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302 catch (FileNotFoundException fnfe) { |
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303 logger.error(fnfe, fnfe); |
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304 } |
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305 catch (IOException ioe) { |
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306 logger.error(ioe, ioe); |
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307 } |
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308 catch (Exception e) { |
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309 logger.error(e, e); |
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310 } |
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311 finally { |
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312 try { |
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313 if (writer != null) { |
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314 writer.close(); |
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315 } |
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316 } |
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317 catch (IOException ioe) { |
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318 logger.debug(ioe, ioe); |
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319 } |
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320 } |
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321 } |
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322 |
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323 |
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324 /** |
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325 * Creates a mapfile with the layer information stored in <i>layers</i>. |
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326 * |
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327 * @param layers Layer information. |
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328 */ |
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329 protected void writeMapfile(List<String> layers) { |
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330 String tmpMapName = "mapfile" + new Date().getTime(); |
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331 |
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332 File mapfile = new File(getMapfilePath()); |
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333 |
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334 File tmp = null; |
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335 Writer writer = null; |
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336 |
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337 try { |
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338 tmp = new File(mapfile.getParent(), tmpMapName); |
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339 tmp.createNewFile(); |
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340 |
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341 writer = new FileWriter(tmp); |
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342 |
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343 VelocityContext context = getVelocityContext(); |
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344 context.put("LAYERS", layers); |
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345 |
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346 Template mapTemplate = getMapfileTemplateObj(); |
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347 if (mapTemplate == null) { |
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348 logger.warn("No mapfile template found."); |
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349 return; |
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350 } |
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351 |
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352 mapTemplate.merge(context, writer); |
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353 |
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354 // we need to create a temporary mapfile first und rename it into |
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355 // real mapfile because we don't run into race conditions on this |
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356 // way. (iw) |
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357 tmp.renameTo(mapfile); |
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358 } |
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359 catch (FileNotFoundException fnfe) { |
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360 logger.error(fnfe, fnfe); |
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361 } |
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362 catch (IOException ioe) { |
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363 logger.error(ioe, ioe); |
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364 } |
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365 catch (Exception e) { |
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366 logger.error(e, e); |
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367 } |
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368 finally { |
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369 try { |
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370 if (writer != null) { |
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371 writer.close(); |
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372 } |
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373 |
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374 if (tmp.exists()) { |
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375 tmp.delete(); |
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376 } |
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377 } |
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378 catch (IOException ioe) { |
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379 logger.debug(ioe, ioe); |
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380 } |
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381 } |
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382 } |
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383 } |
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384 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |