Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/state/CoordinateSelectionState.java @ 733:18dc6a99f4f4

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Fixed NPE will using StateBase without a given Query. gnv-artifacts/trunk@771 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Mon, 15 Mar 2010 12:34:40 +0000
parents 292fbcd5e9ac
children 9a828e5a2390
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;
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5
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6 import java.util.ArrayList;
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7 import java.util.Collection;
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8 import java.util.HashMap;
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9 import java.util.Iterator;
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10 import java.util.List;
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11
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12 import org.apache.log4j.Logger;
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13 import org.w3c.dom.Element;
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14 import org.w3c.dom.Node;
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15 import org.w3c.dom.NodeList;
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16
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17 import com.vividsolutions.jts.geom.Point;
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18
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19 import de.intevation.artifactdatabase.Config;
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20 import de.intevation.gnv.geobackend.base.Result;
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21 import de.intevation.gnv.state.describedata.DefaultKeyValueDescribeData;
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22 import de.intevation.gnv.state.describedata.KeyValueDescibeData;
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23 import de.intevation.gnv.state.describedata.NamedArrayList;
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24 import de.intevation.gnv.state.describedata.NamedCollection;
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25 import de.intevation.gnv.utils.ArtifactXMLUtilities;
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26 import de.intevation.gnv.utils.InputValidator;
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27 import de.intevation.gnv.utils.WKTUtils;
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28 import de.intevation.gnv.utils.exception.ValidationException;
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29
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30 /**
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31 * @author Tim Englich <tim.englich@intevation.de>
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32 *
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33 */
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34 public class CoordinateSelectionState extends StateBase {
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35
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36 /**
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37 * the logger, used to log exceptions and additonaly information
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38 */
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39 private static Logger log = Logger.getLogger(CoordinateSelectionState.class);
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40
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41 /**
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42 * The UID of this Class
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43 */
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44 private static final long serialVersionUID = 6318923553625195063L;
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45
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46 /**
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47 * XPATH Expressions for the setup.
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48 */
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49
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50 private final static String MESH_WIDTH_XPATH = "mesh-width";
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51 private final static String XLINK_XPATH = "xlink:href";
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52 private final static String MESH_LIST_XPATH = "/mesh-widths/mesh";
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53 private final static String ID_XPATH = "id";
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54 private final static String WIDTH_VALUE_XPATH = "width";
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55
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56 /**
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57 * Holds all given Widths between two MeshPoints for different Meshes.
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58 */
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59 private HashMap<String, Double> meshWidths = null;
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60
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61 /**
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62 * Constructor
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63 */
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64 public CoordinateSelectionState() {
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65 super();
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66 }
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67
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68 @Override
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69 protected List<Object> purifyResult(Collection<Result> result, String uuid) {
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70 log.debug("CoordinateSelectionState.purifyResult");
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71 List<Object> describeData = new ArrayList<Object>();
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72
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73 NamedCollection<KeyValueDescibeData> keyValueDescibeData =
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74 extractKVP(result, "FEATUREID", "SHAPE");
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75
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76 describeData.add(keyValueDescibeData);
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77 return describeData;
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78 }
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79
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80 /**
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81 * @see de.intevation.gnv.state.StateBase#prepareInputData4RegionDBQuery(java.lang.String)
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82 */
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83 @Override
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84 protected String prepareInputData4RegionDBQuery(String value) {
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85 log.debug("CoordinateSelectionState.prepareInputData4RegionDBQuery");
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86 double distance=0.;
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87 String returnValue = null;
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88 try {
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89 Point center = new InputValidator().getPointValue(value);
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90 String meshId = super.inputData.get("meshid").getValue();
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91 int segments = 97;
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92 if (meshWidths != null){
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93 Double distanceValue = this.meshWidths.get(meshId);
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94 if (distanceValue != null){
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95 log.debug("User "+distanceValue+" as Buffer around given Point");
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96 distance = distanceValue.doubleValue();
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97 }else{
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98 log.warn("No distance is configured for Mesh with id"+ meshId);
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99 }
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100 }else{
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101 log.warn("No MeshWidth configured. Check if this is correct.");
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102 }
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103 returnValue = center.buffer(distance,segments).toText();
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104 } catch (NumberFormatException e) {
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105 log.error(e,e);
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106 } catch (ValidationException e) {
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107 log.error(e,e);
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108 }
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109 return returnValue;
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110
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111 }
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112
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113 /**
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114 * @see de.intevation.gnv.state.StateBase#extractKVP(java.util.Collection, java.lang.String, java.lang.String)
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115 */
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116 @Override
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117 protected NamedCollection<KeyValueDescibeData> extractKVP(
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118 Collection<Result> result,
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119 String keyid,
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120 String valueid) {
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121 Iterator<Result> rit = result.iterator();
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122 NamedCollection<KeyValueDescibeData> keyValueDescibeData = new NamedArrayList<KeyValueDescibeData>(
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123 this.dataName, result.size());
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124 keyValueDescibeData.setMultiSelect(this.dataMultiSelect);
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125 String prevKey = null;
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126 while (rit.hasNext()) {
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127 Result resultValue = rit.next();
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128 String key = resultValue.getString(keyid);
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129 if(prevKey == null || !prevKey.equals(key)){ // TODO: FIXME: We have to do that because the arcsde does not support a distinct Query on Layers
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130 String geomString = this.convert2DisplayCoordinate(resultValue.getString(valueid));
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131 String value = geomString;
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132 if (resultValue.getResultDescriptor().getColumnIndex("VALUE") > 0){
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133 value = resultValue.getString("VALUE") + " - "+value;
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134 }
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135
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136
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137 keyValueDescibeData.add(new DefaultKeyValueDescribeData(key,value ));
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138 }
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139 prevKey = key;
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140 }
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141 return keyValueDescibeData;
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142 }
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143
507
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144 protected static String convert2DisplayCoordinate(String wkt){
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145 return WKTUtils.toText(wkt);
335
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146 }
511
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147
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148 /**
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149 * @see de.intevation.gnv.state.StateBase#setup(org.w3c.dom.Node)
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150 */
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151 @Override
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152 public void setup(Node configuration) {
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153 super.setup(configuration);
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154 Element widthElement = (Element)Config.getNodeXPath(configuration, MESH_WIDTH_XPATH);
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155
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156 if (widthElement != null){
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157 String fileName = widthElement.getAttribute(XLINK_XPATH);
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158 fileName = Config.replaceConfigDir(fileName);
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159 Node configurationNode = new ArtifactXMLUtilities().readConfiguration(fileName);
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160 NodeList meshNodes = Config.getNodeSetXPath(configurationNode,MESH_LIST_XPATH );
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161 if (meshNodes != null){
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162 meshWidths = new HashMap<String, Double>(meshNodes.getLength());
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163 for (int i = 0; i < meshNodes.getLength(); i++){
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164 Element meshNode = (Element)meshNodes.item(i);
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165 String id = meshNode.getAttribute(ID_XPATH);
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166 Double value = Double.parseDouble(meshNode.getAttribute(WIDTH_VALUE_XPATH));
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167 meshWidths.put(id, value);
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168 }
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169 }
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170 }else{
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171 log.warn("No Mesh Width defined.");
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172 }
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173 }
335
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174 }
http://dive4elements.wald.intevation.org