Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/state/layer/LayerOutputState.java @ 728:f6630d0203da
Put all Attributes of the Databasetables into the Shapefile which will be produced for the Product Layer
gnv-artifacts/trunk@764 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Tim Englich <tim.englich@intevation.de> |
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date | Fri, 12 Mar 2010 11:36:38 +0000 |
parents | 9ba6bb85d6dd |
children | d23ad22bcfe7 |
rev | line source |
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1 /** |
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2 * |
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3 */ |
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4 package de.intevation.gnv.state.layer; |
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5 |
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6 import java.io.File; |
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7 import java.io.IOException; |
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8 import java.io.OutputStream; |
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9 import java.util.Collection; |
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10 import java.util.Iterator; |
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11 |
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12 import org.apache.log4j.Logger; |
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13 import org.w3c.dom.Document; |
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14 import org.w3c.dom.Element; |
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15 import org.w3c.dom.Node; |
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16 |
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17 import com.vividsolutions.jts.geom.Geometry; |
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18 import com.vividsolutions.jts.io.ParseException; |
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19 import com.vividsolutions.jts.io.WKTReader; |
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20 |
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21 import de.intevation.artifactdatabase.Config; |
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22 import de.intevation.artifactdatabase.XMLUtils; |
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23 import de.intevation.artifacts.ArtifactNamespaceContext; |
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24 import de.intevation.artifacts.CallContext; |
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25 import de.intevation.gnv.artifacts.context.GNVArtifactContext; |
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26 import de.intevation.gnv.geobackend.base.Result; |
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27 import de.intevation.gnv.geobackend.base.query.QueryExecutor; |
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28 import de.intevation.gnv.geobackend.base.query.QueryExecutorFactory; |
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29 import de.intevation.gnv.geobackend.base.query.exception.QueryException; |
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30 import de.intevation.gnv.state.InputData; |
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31 import de.intevation.gnv.state.OutputStateBase; |
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32 import de.intevation.gnv.state.exception.StateException; |
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33 import de.intevation.gnv.utils.ArtifactXMLUtilities; |
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34 import de.intevation.gnv.utils.FileUtils; |
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35 import de.intevation.gnv.utils.MapfileGenerator; |
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36 import de.intevation.gnv.utils.MetaWriter; |
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37 import de.intevation.gnv.utils.ShapeFileWriter; |
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38 |
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39 /** |
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40 * @author Tim Englich <tim.englich@intevation.de> |
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41 * |
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42 */ |
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43 public class LayerOutputState extends OutputStateBase { |
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44 |
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45 /** |
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46 * the logger, used to log exceptions and additonaly information |
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47 */ |
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48 private static Logger log = Logger.getLogger(LayerOutputState.class); |
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49 |
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50 /** |
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51 * The UID of this Class. |
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52 */ |
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53 private static final long serialVersionUID = 9180957321704424049L; |
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54 |
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55 // TODO: Replace |
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56 public static final String LAYER_MODEL = "layer"; |
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57 |
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58 /** |
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59 * The ID for the Query fetching the Layer from the DB |
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60 */ |
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61 private String dataQueryID = null; |
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62 |
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63 /** |
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64 * The ID for the Query fetching the Geometry from the DB |
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65 * which should be used to Clip the Layerdata |
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66 */ |
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67 private String geometryQueryID = null; |
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68 |
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69 private String columnQueryID = null; |
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70 |
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71 /** |
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72 * The ID for the Value which will hold the Geometrie-Value |
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73 */ |
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74 private String geometryID = null; |
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75 |
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76 private Boolean shapeFileLock = new Boolean(true); |
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77 |
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78 private String shapeFilePath; |
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79 |
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80 private String geometryType = null; |
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81 |
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82 private String templateID = null; |
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83 |
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84 public static final String SHAPEFILE_NAME = "data.shp"; |
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85 |
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86 /** |
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87 * Constructor |
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88 */ |
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89 public LayerOutputState() { |
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90 super(); |
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91 } |
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92 |
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93 /** |
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94 * @see de.intevation.gnv.state.OutputState#out(org.w3c.dom.Document, |
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95 * java.util.Collection, java.io.OutputStream, |
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96 * java.lang.String, de.intevation.artifacts.CallContext) |
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97 */ |
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98 public void out(Document format, Collection<InputData> inputData, |
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99 OutputStream outputStream, String uuid, |
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100 CallContext callContext) throws StateException { |
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101 |
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102 log.debug("LayerOutputState.out"); |
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103 String outputMode = XMLUtils.xpathString( |
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104 format, XPATH_OUTPUT_MODE, ArtifactNamespaceContext.INSTANCE); |
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105 if (outputMode.equalsIgnoreCase("wms")) { |
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106 Collection<Result> data = this.fetchData(); |
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107 if (data != null && !data.isEmpty()){ |
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108 XMLUtils.toStream(this.getWMS(uuid, callContext, data), |
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109 outputStream); |
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110 }else{ |
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111 this.writeExceptionReport2Stream(outputStream); |
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112 } |
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113 }else if (outputMode.equalsIgnoreCase("zip")){ |
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114 Collection<Result> data = this.fetchData(); |
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115 if (data != null && !data.isEmpty()){ |
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116 this.writeZip(uuid, callContext, outputStream, data); |
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117 }else{ |
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118 this.writeExceptionReport2Stream(outputStream); |
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119 } |
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120 |
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121 } |
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122 } |
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123 |
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124 /** |
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125 * @param outputStream |
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126 */ |
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127 private void writeExceptionReport2Stream(OutputStream outputStream) { |
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128 Document document = XMLUtils.newDocument(); |
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129 new ArtifactXMLUtilities(). |
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130 createExceptionReport("No Data to Export", document); |
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131 XMLUtils.toStream(document,outputStream); |
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132 } |
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133 |
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134 |
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135 /** |
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136 * Fetches the Data from the Databasebackend |
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137 * @return |
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138 */ |
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139 protected Collection<Result> fetchData(){ |
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140 log.debug("LayerOutputState.fetchData"); |
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141 // TODO PUT ALL in CACHE |
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142 Collection<Result> result = this.getData(this.queryID); |
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143 Collection<Result> data = null; |
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144 String geometryWKT = null; |
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145 if (result != null){ |
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146 QueryExecutor queryExecutor = QueryExecutorFactory.getInstance() |
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147 .getQueryExecutor(); |
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148 Iterator<Result> it = result.iterator(); |
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149 String[] queryValues = null; |
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150 if (it.hasNext()){ |
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151 Result resultValue = it.next(); |
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152 String table = resultValue.getString(0); |
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153 String where = resultValue.getString(1); |
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154 String columns = this.fetchColumns(table); |
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155 |
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156 templateID = resultValue.getString(2); |
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157 if (this.geometryID != null){ |
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158 InputData geometryInputData = |
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159 this.inputData.get(this.geometryID); |
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160 if (geometryInputData != null){ |
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161 |
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162 try { |
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163 Collection<Result> geometryData = queryExecutor |
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164 .executeQuery(this.geometryQueryID, |
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165 new String[]{geometryInputData.getValue()}); |
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166 Iterator<Result> git = geometryData.iterator(); |
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167 if (git.hasNext()){ |
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168 Result geometryValue = git.next(); |
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169 geometryWKT = geometryValue.getString(0); |
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170 } |
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171 } catch (QueryException e) { |
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172 log.error(e,e); |
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173 // TODO: what should happen?? |
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174 } |
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175 queryValues = new String[]{columns, |
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176 table, |
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177 where, |
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178 geometryWKT}; |
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179 }else{ |
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180 // TODO: Look into the presetting for an WKT |
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181 queryValues = new String[]{columns,table,where}; |
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182 } |
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183 }else{ |
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184 // TODO: Look into the presetting for an WKT |
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185 queryValues = new String[]{columns,table,where}; |
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186 |
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187 } |
616
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188 } |
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189 |
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190 try { |
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191 data = queryExecutor.executeQuery(dataQueryID, |
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192 queryValues); |
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193 if (data != null && geometryWKT != null){ |
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194 WKTReader wktReader = new WKTReader(); |
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195 Geometry border = wktReader.read(geometryWKT); |
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196 |
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197 Iterator<Result> dataIt = data.iterator(); |
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198 while (dataIt.hasNext()){ |
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199 // Trim the Geometries using the |
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200 // Geometry if on is available. |
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201 Result current = dataIt.next(); |
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202 String currentWKT = current.getString(0); |
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203 Geometry currentGeometry = null; |
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204 try { |
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205 currentGeometry = wktReader.read(currentWKT); |
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206 } catch (Exception e) { |
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207 log.error("Error parsing Geometry "+ currentWKT); |
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208 log.error(e,e); |
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209 } |
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210 |
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211 if (currentGeometry != null){ |
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212 Geometry newGeometry = currentGeometry.intersection(border); |
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213 current.addColumnValue(0, newGeometry.toText()); |
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214 } |
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215 } |
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216 } |
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217 } catch (QueryException e) { |
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218 log.error(e,e); |
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219 } catch (ParseException e){ |
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220 log.error(e,e); |
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221 } |
616
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222 } |
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223 return data; |
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224 } |
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225 |
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226 private String fetchColumns(String tableName){ |
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227 String returnValue = null; |
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228 try { |
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229 String[] filter = tableName.toUpperCase().split("\\."); |
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230 QueryExecutor queryExecutor = QueryExecutorFactory.getInstance() |
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231 .getQueryExecutor(); |
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232 |
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233 Collection<Result> columnData = queryExecutor. |
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234 executeQuery(this.columnQueryID, |
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235 filter); |
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236 if (columnData != null && !columnData.isEmpty()){ |
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237 StringBuffer sb = new StringBuffer(); |
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238 synchronized (sb) { |
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239 Iterator<Result> it = columnData.iterator(); |
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240 while(it.hasNext()){ |
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241 Result current = it.next(); |
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242 sb.append(current.getString(0)); |
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243 if (it.hasNext()){ |
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244 sb.append(" , "); |
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245 } |
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246 } |
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247 } |
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248 returnValue = sb.toString(); |
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249 } |
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250 |
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251 } catch (QueryException e) { |
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252 log.error(e,e); |
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253 } |
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254 return returnValue; |
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255 } |
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256 @Override |
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257 public void setup(Node configuration) { |
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258 log.debug("LayerOutputState.setup"); |
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259 super.setup(configuration); |
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260 this.dataQueryID = Config.getStringXPath(configuration, |
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261 "queryID-layerdata"); |
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262 this.geometryID = Config.getStringXPath(configuration, |
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263 "inputvalue-geometry"); |
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264 this.geometryQueryID = Config.getStringXPath(configuration, |
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265 "queryID-geometry"); |
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266 |
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267 this.columnQueryID = "layer_colums"; //Config.getStringXPath(configuration, |
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268 // "queryID-columns"); |
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269 } |
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270 |
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271 protected String writeToShapeFile( |
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272 String uuid, |
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273 Collection<Result> data, |
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274 CallContext callContext |
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275 ) { |
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276 File baseDir = shapefileDirectory(callContext); |
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277 |
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278 File shapeDir = new File(baseDir, uuid); |
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279 boolean success = false; |
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280 boolean createdDir = false; |
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281 |
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282 try { |
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283 synchronized (shapeFileLock) { |
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284 int count = 0; |
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285 while (shapeDir.exists()) { |
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286 shapeDir = new File(baseDir, uuid + "-" + count); |
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287 ++count; |
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288 } |
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289 |
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290 if (!shapeDir.mkdirs()) { |
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291 log.error("cannot create directory '" |
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292 + shapeDir.getAbsolutePath() + "'"); |
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293 return null; |
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294 } |
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295 createdDir = true; |
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296 } |
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297 |
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298 File shapeFile = new File(shapeDir, SHAPEFILE_NAME); |
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299 if ((geometryType = ShapeFileWriter.writeDataToFile(shapeFile, "data", data)) == null){ |
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300 log.error("writing data into shapefile failed"); |
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301 return null; |
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302 } |
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303 |
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304 shapeFilePath = shapeDir.getAbsolutePath(); |
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305 success = true; |
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306 |
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307 callContext.afterCall(CallContext.STORE); |
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308 |
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309 return shapeFilePath; |
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310 } |
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311 finally { |
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312 if (!success && createdDir) { |
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313 FileUtils.deleteRecursive(shapeDir); |
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314 } |
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315 } |
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316 } |
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317 |
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318 protected void writeZip( |
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319 String uuid, |
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320 CallContext callContext, |
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321 OutputStream output, |
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322 Collection<Result> data |
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323 ) |
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324 throws StateException |
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325 { |
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326 try { |
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327 String p = getShapeFilePath(); |
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328 if (p != null) { |
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329 File dir = new File(p); |
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330 if (dir.isDirectory()) { |
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331 FileUtils.createZipArchive(dir, output); |
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332 } |
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333 } |
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334 else { |
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335 |
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336 if ((p = writeToShapeFile(uuid, data, callContext)) != null) { |
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337 FileUtils.createZipArchive(new File(p), output); |
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338 } |
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339 } |
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340 } |
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341 catch (IOException ioe) { |
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342 log.error(ioe.getLocalizedMessage(), ioe); |
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343 } |
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344 } |
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345 |
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346 public String getShapeFilePath() { |
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347 synchronized (shapeFileLock) { |
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348 return shapeFilePath; |
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349 } |
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350 } |
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351 |
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352 private static File shapefileDirectory(CallContext callContext) { |
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353 // TODO: Refactoring nessessary it should be used only one Shapefilepath |
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354 // for alle Modes. Code was taken from HorizontalCrossSectionMeshOutputState |
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355 GNVArtifactContext context = |
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356 (GNVArtifactContext)callContext.globalContext(); |
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357 File dir = (File)context.get( |
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358 GNVArtifactContext.HORIZONTAL_CROSS_SECTION_RESULT_SHAPEFILE_PATH_KEY); |
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359 return dir != null |
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360 ? dir |
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361 : GNVArtifactContext.DEFAULT_HORIZONTAL_CROSS_SECTION_PROFILE_SHAPEFILE_PATH; |
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362 } |
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363 |
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364 /** |
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365 * @see de.intevation.gnv.state.StateBase#endOfLife(java.lang.Object) |
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366 */ |
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367 @Override |
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368 public void endOfLife(Object globalContext) { |
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369 super.endOfLife(globalContext); |
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370 |
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371 // do it in background |
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372 new Thread() { |
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373 public void run() { |
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374 // TODO: Do the un-publishing WMS stuff. |
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375 String path = resetShapeFilePath(); |
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376 |
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377 if (path == null) { |
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378 return; |
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379 } |
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380 |
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381 File dir = new File(path); |
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382 |
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383 for (int i = 0; i < 10; ++i) { |
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384 if (!dir.exists() || FileUtils.deleteRecursive(dir)) { |
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385 MapfileGenerator.getInstance().update(); |
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386 return; |
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387 } |
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388 |
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389 try { |
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390 Thread.sleep(10000L); |
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391 } |
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392 catch (InterruptedException ie) { |
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393 } |
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394 } |
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395 |
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396 log.error("failed to remove directory '" + path + "'"); |
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397 } // run |
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398 }.start(); |
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399 } |
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400 |
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401 public String resetShapeFilePath() { |
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402 synchronized (shapeFileLock) { |
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403 String path = shapeFilePath; |
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404 shapeFilePath = null; |
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405 geometryType = null; |
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406 templateID = null; |
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407 return path; |
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408 } |
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409 } |
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410 protected Document getWMS(String uuid, |
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411 CallContext callContext, |
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412 Collection<Result> data) |
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413 throws StateException |
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414 { |
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415 // TODO: Do the real WMS publishing here! |
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416 Document document = XMLUtils.newDocument(); |
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417 |
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418 Element pathElement = document.createElement("path"); |
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419 document.appendChild(pathElement); |
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420 |
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421 String path = getShapeFilePath(); |
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422 |
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423 if (path != null && new File(path).isDirectory()) { |
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424 pathElement.setTextContent(path); |
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425 } |
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426 else { |
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427 |
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428 if (data != null && |
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429 (path = writeToShapeFile(uuid, data, callContext)) != null) { |
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430 |
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431 String paramType = LAYER_MODEL+"_"+templateID; |
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432 |
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433 if (!MapfileGenerator.getInstance().templateExists(paramType)){ |
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434 // If the template doesn't exist the Defaulttemplates will be used. |
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435 paramType = LAYER_MODEL+"_"+this.geometryType.toLowerCase(); |
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436 } |
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437 Document meta = MetaWriter.writeLayerMeta(callContext, uuid, |
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438 path, paramType, |
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439 this.determineGeometryType()); |
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440 if (meta != null) { |
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441 MapfileGenerator.getInstance().update(); |
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442 return meta; |
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443 } |
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444 |
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445 pathElement.setTextContent(path); |
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446 } |
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447 } |
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448 |
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449 return document; |
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450 } |
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451 |
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452 private String determineGeometryType(){ |
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453 |
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454 String returnValue = this.geometryType.toLowerCase(); |
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455 |
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456 if (returnValue.equalsIgnoreCase("linestring")){ |
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457 returnValue = "Line"; |
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458 } |
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459 return returnValue; |
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460 } |
616
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461 } |