Mercurial > dive4elements > gnv-client

annotate gnv/src/main/java/de/intevation/gnv/action/mapviewer/parser/XMLExternalCallParser.java @ 402:b88e881e8e94

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Added the first Implementation (not complete and not ready to use) for the Interface from the MapViewer to the GNV gnv/trunk@573 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 19 Jan 2010 14:47:36 +0000
parents
children 15ac78a91d1b
rev   line source
402
b88e881e8e94 Added the first Implementation (not complete and not ready to use) for the Interface from the MapViewer to the GNV
Tim Englich <tim.englich@intevation.de>
parents:
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1 /**
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2 *
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3 */
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4 package de.intevation.gnv.action.mapviewer.parser;
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5
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6 import java.io.InputStream;
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7 import java.util.ArrayList;
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8 import java.util.Collection;
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9
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10
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11 import org.apache.log4j.Logger;
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12 import org.w3c.dom.Document;
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13 import org.w3c.dom.Element;
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14 import org.w3c.dom.NodeList;
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15
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16 import de.intevation.gnv.artifactdatabase.objects.map.DefaultLayer;
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17 import de.intevation.gnv.artifactdatabase.objects.map.DefaultMapService;
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18 import de.intevation.gnv.artifactdatabase.objects.map.Layer;
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19 import de.intevation.gnv.artifactdatabase.objects.map.MapService;
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20 import de.intevation.gnv.util.XMLUtils;
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21
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22 /**
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23 * @author Tim Englich <tim.englich@intevation.de>
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24 *
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25 */
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26 public class XMLExternalCallParser implements ExternalCallParser {
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27
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28 /**
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29 * the logger, used to log exceptions and additonaly information
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30 */
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31 private static Logger log = Logger.getLogger(XMLExternalCallParser.class);
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32
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33 private static String XPATH_GEOMETRY = "/gnviewer/location/data";
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34 private static String XPATH_SRS = "/gnviewer/location/srs";
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35 private static String XPATH_MAPSERVICES_NODESET = "/gnviewer/mapservices/mapservice";
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36 private static String XPATH_LAYER = "layer";
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37 private static String ATTRIBUTE_ID = "id";
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38 private static String ATTRIBUTE_NAME = "name";
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39 private static String ATTRIBUTE_TYPE = "type";
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40 private static String ATTRIBUTE_URL = "url";
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41
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42 private String geometry = null;
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43 private String srs = null;
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44
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45 private Collection<MapService> mapServices = null;
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46
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47 private InputStream inputStream = null;
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48
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49 /**
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50 * Constructor
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51 */
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52 public XMLExternalCallParser(InputStream inputStream) {
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53 this.inputStream = inputStream;
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54 }
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55
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56 /**
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57 * @see de.intevation.gnv.action.mapviewer.parser.ExternalCallParser#getGeometry()
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58 */
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59 public String getGeometry() {
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60 return this.geometry;
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61 }
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62
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63 /**
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64 * @see de.intevation.gnv.action.mapviewer.parser.ExternalCallParser#getMapServices()
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65 */
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66 public Collection<MapService> getMapServices() {
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67 return this.mapServices;
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68 }
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69
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70 /**
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71 * @see de.intevation.gnv.action.mapviewer.parser.ExternalCallParser#parse()
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72 */
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73 public void parse() throws ExternalCallParserException {
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74 if (inputStream != null){
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75 XMLUtils xmlUtils = new XMLUtils();
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76 Document document = xmlUtils.readDocument(this.inputStream);
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77 if (document != null){
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78
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79 this.geometry = xmlUtils.getStringXPath(document, XPATH_GEOMETRY);
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80 this.srs = xmlUtils.getStringXPath(document, XPATH_SRS);
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81 NodeList mapservicesNodes =
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82 xmlUtils.getNodeSetXPath(document, XPATH_MAPSERVICES_NODESET);
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83 if (mapservicesNodes != null){
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84 this.mapServices = new ArrayList<MapService>(mapservicesNodes.getLength());
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85 for (int i = 0; i < mapservicesNodes.getLength(); i++){
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86 Element mapserviceNode = (Element)mapservicesNodes.item(i);
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87 String mapserviceID = mapserviceNode.getAttribute(ATTRIBUTE_ID);
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88 String mapserviceType = mapserviceNode.getAttribute(ATTRIBUTE_TYPE);
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89 String mapserviceUrl = mapserviceNode.getAttribute(ATTRIBUTE_URL);
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90 NodeList layerNodes = xmlUtils.getNodeSetXPath(mapserviceNode, XPATH_LAYER);
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91 Collection<Layer> layer = null;
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92 if (layerNodes != null && layerNodes.getLength() > 0){
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93 layer = new ArrayList<Layer>(layerNodes.getLength());
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94 layer = this.extractLayer(layer, null, layerNodes);
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95 }else{
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96 log.debug("No Layer given for this Mapservice");
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97 }
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98 MapService mapService =
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99 new DefaultMapService(mapserviceID, layer,
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100 mapserviceType, mapserviceUrl);
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101 this.mapServices.add(mapService);
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102 }
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103
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104 }else{
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105 String errMsg = "XML-Document does not contain any Mapservices which are required.";
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106 log.error(errMsg);
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107 throw new ExternalCallParserException(errMsg);
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108 }
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109
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110 }else{
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111 String errMsg = "XML-Document could not be read from InputStream.";
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112 log.error(errMsg);
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113 throw new ExternalCallParserException(errMsg);
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114 }
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115 }else{
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116 String errMsg = "No InputStream given for parsing the Call.";
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117 log.error(errMsg);
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118 throw new ExternalCallParserException(errMsg);
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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 * This Method extracts all Layers and put them into the Collection.
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124 * @param layer
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125 * @param groupId
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126 * @param layerNodes
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127 * @return
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128 */
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129 private Collection<Layer> extractLayer(Collection<Layer> layer, String groupId, NodeList layerNodes){
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130 XMLUtils xmlUtils = new XMLUtils();
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131 for (int i = 0; i < layerNodes.getLength(); i++){
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132 Element layerNode = (Element)layerNodes.item(i);
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133 String id = layerNode.getAttribute(ATTRIBUTE_ID);
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134 String name = layerNode.getAttribute(ATTRIBUTE_NAME);
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135 NodeList localLayerNodes = xmlUtils.getNodeSetXPath(layerNode, XPATH_LAYER);
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136 Layer tmpLayer = new DefaultLayer(id, name,
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137 (localLayerNodes != null &&
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138 localLayerNodes.getLength() > 0),
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139 groupId);
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140 layer.add(tmpLayer);
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141 if (localLayerNodes != null && localLayerNodes.getLength() > 0){
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142 layer = this.extractLayer(layer, id, localLayerNodes);
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143 }
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144 }
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145 return layer;
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146 }
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147
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148 /**
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149 * @see de.intevation.gnv.action.mapviewer.parser.ExternalCallParser#getSRS()
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150 */
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151 public String getSRS() {
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152 return this.srs;
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153 }
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154
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155 }
http://dive4elements.wald.intevation.org