Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/state/CoordinateSelectionState.java @ 819:6925d18580c0

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Added more Javadoc. gnv-artifacts/trunk@905 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Mon, 12 Apr 2010 13:12:21 +0000
parents 22c18083225e
children 499cfbbb61bc
rev   line source
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1 package de.intevation.gnv.state;
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2
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3 import com.vividsolutions.jts.geom.Point;
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5 import de.intevation.artifactdatabase.Config;
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7 import de.intevation.gnv.geobackend.base.Result;
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9 import de.intevation.gnv.state.describedata.DefaultKeyValueDescribeData;
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10 import de.intevation.gnv.state.describedata.KeyValueDescibeData;
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11 import de.intevation.gnv.state.describedata.NamedArrayList;
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12 import de.intevation.gnv.state.describedata.NamedCollection;
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14 import de.intevation.gnv.utils.ArtifactXMLUtilities;
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15 import de.intevation.gnv.utils.InputValidator;
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16 import de.intevation.gnv.utils.WKTUtils;
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18 import de.intevation.gnv.utils.exception.ValidationException;
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19
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20 import java.util.ArrayList;
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21 import java.util.Collection;
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22 import java.util.HashMap;
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23 import java.util.Iterator;
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24 import java.util.List;
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26 import org.apache.log4j.Logger;
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27
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28 import org.w3c.dom.Element;
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29 import org.w3c.dom.Node;
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30 import org.w3c.dom.NodeList;
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31
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32 /**
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33 * This state handles coordinate input by the user. It searches database results
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34 * for coordinates and turns them into a human readable form.
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35 *
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36 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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37 *
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38 */
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39 public class CoordinateSelectionState extends StateBase {
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40
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41 /**
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42 * the logger, used to log exceptions and additonaly information
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43 */
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44 private static Logger log = Logger.getLogger(CoordinateSelectionState.class);
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45
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46 /**
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47 * The UID of this Class
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48 */
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49 private static final long serialVersionUID = 6318923553625195063L;
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50
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51 /**
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52 * XPATH Expressions for the setup.
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53 */
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54
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55 private final static String MESH_WIDTH_XPATH = "mesh-width";
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56 private final static String XLINK_XPATH = "xlink:href";
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57 private final static String MESH_LIST_XPATH = "/mesh-widths/mesh";
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58 private final static String ID_XPATH = "id";
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59 private final static String WIDTH_VALUE_XPATH = "width";
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61 /**
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62 * Holds all given Widths between two MeshPoints for different Meshes.
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63 */
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64 private HashMap<String, Double> meshWidths = null;
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65
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66 /**
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67 * Constructor
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68 */
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69 public CoordinateSelectionState() {
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70 super();
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71 }
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72
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73 @Override
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74 protected List<Object> purifyResult(Collection<Result> result, String uuid) {
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75 log.debug("CoordinateSelectionState.purifyResult");
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76 List<Object> describeData = new ArrayList<Object>();
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77
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78 NamedCollection<KeyValueDescibeData> keyValueDescibeData =
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79 extractKVP(result, "FEATUREID", "SHAPE");
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80
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81 describeData.add(keyValueDescibeData);
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82 return describeData;
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83 }
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86 @Override
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87 protected String prepareInputData4RegionDBQuery(String value) {
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88 log.debug("CoordinateSelectionState.prepareInputData4RegionDBQuery");
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89 double distance=0.;
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90 String returnValue = null;
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91 try {
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92 @SuppressWarnings("static-access")
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93 Point center = InputValidator.getPointValue(value);
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94 String meshId = super.inputData.get("meshid").getValue();
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95 int segments = 97;
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96 if (meshWidths != null){
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97 Double distanceValue = this.meshWidths.get(meshId);
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98 if (distanceValue != null){
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99 log.debug("User "+distanceValue+" as Buffer around given Point");
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100 distance = distanceValue.doubleValue();
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101 }else{
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102 log.warn("No distance is configured for Mesh with id"+ meshId);
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103 }
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104 }else{
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105 log.warn("No MeshWidth configured. Check if this is correct.");
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106 }
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107 returnValue = center.buffer(distance,segments).toText();
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108 } catch (NumberFormatException e) {
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109 log.error(e,e);
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110 } catch (ValidationException e) {
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111 log.error(e,e);
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112 }
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113 return returnValue;
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114
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115 }
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117
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118 @Override
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119 protected NamedCollection<KeyValueDescibeData> extractKVP(
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120 Collection<Result> result,
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121 String keyid,
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122 String valueid) {
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123 Iterator<Result> rit = result.iterator();
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124 NamedCollection<KeyValueDescibeData> keyValueDescibeData = new NamedArrayList<KeyValueDescibeData>(
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125 this.dataName, result.size());
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126 keyValueDescibeData.setMultiSelect(this.dataMultiSelect);
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127 String prevKey = null;
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128 while (rit.hasNext()) {
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129 Result resultValue = rit.next();
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130 String key = resultValue.getString(keyid);
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131 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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132 @SuppressWarnings("static-access")
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133 String geomString = CoordinateSelectionState.convert2DisplayCoordinate(resultValue.getString(valueid));
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134 String value = geomString;
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135 if (resultValue.getResultDescriptor().getColumnIndex("VALUE") > 0){
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136 value = resultValue.getString("VALUE") + " - "+value;
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137 }
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138
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139
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140 keyValueDescibeData.add(new DefaultKeyValueDescribeData(key,value ));
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141 }
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142 prevKey = key;
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143 }
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144 return keyValueDescibeData;
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145 }
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146
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147 /**
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148 * Turn coordinate into a human readable format.
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149 *
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150 * @param wkt Coordinate as wkt string.
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151 * @return formatted coordinate.
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152 */
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153 protected static String convert2DisplayCoordinate(String wkt){
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154 return WKTUtils.toText(wkt);
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155 }
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156
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157
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158 @Override
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159 public void setup(Node configuration) {
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160 super.setup(configuration);
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161 Element widthElement = (Element)Config.getNodeXPath(configuration, MESH_WIDTH_XPATH);
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162
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163 if (widthElement != null){
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164 String fileName = widthElement.getAttribute(XLINK_XPATH);
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165 fileName = Config.replaceConfigDir(fileName);
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166 Node configurationNode = new ArtifactXMLUtilities().readConfiguration(fileName);
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167 NodeList meshNodes = Config.getNodeSetXPath(configurationNode,MESH_LIST_XPATH );
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168 if (meshNodes != null){
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169 meshWidths = new HashMap<String, Double>(meshNodes.getLength());
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170 for (int i = 0; i < meshNodes.getLength(); i++){
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171 Element meshNode = (Element)meshNodes.item(i);
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172 String id = meshNode.getAttribute(ID_XPATH);
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173 Double value = Double.parseDouble(meshNode.getAttribute(WIDTH_VALUE_XPATH));
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174 meshWidths.put(id, value);
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175 }
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176 }
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177 }else{
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178 log.warn("No Mesh Width defined.");
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179 }
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180 }
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181 }
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182 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org