Mercurial > dive4elements > gnv-client

annotate gnv/src/main/java/de/intevation/gnv/action/mapviewer/parser/XMLExternalCallParser.java @ 684:57fa8019fbdc

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Bring @author javadoc tags in form '@author <a href="john.doe@example.com">John Doe</a>' gnv/trunk@858 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 29 Mar 2010 09:40:35 +0000
parents d49e8695786c
children 4b64b4d1f0cf
rev   line source
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1 package de.intevation.gnv.action.mapviewer.parser;
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2
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3 import de.intevation.gnv.artifactdatabase.objects.map.DefaultLayer;
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4 import de.intevation.gnv.artifactdatabase.objects.map.DefaultMapService;
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5 import de.intevation.gnv.artifactdatabase.objects.map.Layer;
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6 import de.intevation.gnv.artifactdatabase.objects.map.MapService;
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7
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8 import de.intevation.gnv.util.XMLUtils;
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9
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10 import java.io.InputStream;
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12 import java.util.ArrayList;
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13 import java.util.Collection;
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14
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15 import org.apache.log4j.Logger;
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16
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17 import org.w3c.dom.Document;
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18 import org.w3c.dom.Element;
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19 import org.w3c.dom.NodeList;
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21 /**
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22 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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23 */
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24 public class XMLExternalCallParser implements ExternalCallParser {
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25
402
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26 /**
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27 * the logger, used to log exceptions and additonaly information
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28 */
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29 private static Logger log = Logger.getLogger(XMLExternalCallParser.class);
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31 private static String XPATH_GEOMETRY = "/gnviewer/location/data";
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32 private static String XPATH_SRS = "/gnviewer/location/srs";
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33 private static String XPATH_MAPSERVICES_NODESET = "/gnviewer/mapservices/mapservice";
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34 private static String XPATH_LAYER = "layer";
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35 private static String ATTRIBUTE_ID = "id";
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36 private static String ATTRIBUTE_NAME = "name";
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37 private static String ATTRIBUTE_TYPE = "type";
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38 private static String ATTRIBUTE_URL = "url";
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39
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40 private String geometry = null;
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41 private String srs = null;
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42
402
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43 private Collection<MapService> mapServices = null;
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44
402
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45 private InputStream inputStream = null;
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46
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47 /**
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48 * Constructor
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49 */
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50 public XMLExternalCallParser(InputStream inputStream) {
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51 this.inputStream = inputStream;
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52 }
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53
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54 /**
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55 * @see de.intevation.gnv.action.mapviewer.parser.ExternalCallParser#getGeometry()
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56 */
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57 public String getGeometry() {
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58 return this.geometry;
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59 }
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60
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61 /**
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62 * @see de.intevation.gnv.action.mapviewer.parser.ExternalCallParser#getMapServices()
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63 */
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64 public Collection<MapService> getMapServices() {
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65 return this.mapServices;
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66 }
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67
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68 /**
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69 * @see de.intevation.gnv.action.mapviewer.parser.ExternalCallParser#parse()
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70 */
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71 public void parse() throws ExternalCallParserException {
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72 if (inputStream != null){
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73 XMLUtils xmlUtils = new XMLUtils();
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74 Document document = xmlUtils.readDocument(this.inputStream);
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75 if (document != null){
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76
402
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77 this.geometry = xmlUtils.getStringXPath(document, XPATH_GEOMETRY);
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78 this.srs = xmlUtils.getStringXPath(document, XPATH_SRS);
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79 NodeList mapservicesNodes =
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80 xmlUtils.getNodeSetXPath(document, XPATH_MAPSERVICES_NODESET);
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81 if (mapservicesNodes != null){
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82 this.mapServices = new ArrayList<MapService>(mapservicesNodes.getLength());
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83 for (int i = 0; i < mapservicesNodes.getLength(); i++){
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84 Element mapserviceNode = (Element)mapservicesNodes.item(i);
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85 String mapserviceID = mapserviceNode.getAttribute(ATTRIBUTE_ID);
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86 String mapserviceType = mapserviceNode.getAttribute(ATTRIBUTE_TYPE);
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87 String mapserviceUrl = mapserviceNode.getAttribute(ATTRIBUTE_URL);
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88 NodeList layerNodes = xmlUtils.getNodeSetXPath(mapserviceNode, XPATH_LAYER);
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89 Collection<Layer> layer = null;
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90 if (layerNodes != null && layerNodes.getLength() > 0){
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91 layer = new ArrayList<Layer>(layerNodes.getLength());
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92 layer = this.extractLayer(layer, null, layerNodes);
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93 }else{
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94 log.debug("No Layer given for this Mapservice");
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95 }
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96 MapService mapService =
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97 new DefaultMapService(mapserviceID, layer,
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98 mapserviceType, mapserviceUrl);
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99 this.mapServices.add(mapService);
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100 }
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101
402
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102 }else{
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103 String errMsg = "XML-Document does not contain any Mapservices which are required.";
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104 log.error(errMsg);
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105 throw new ExternalCallParserException(errMsg);
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106 }
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107
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108 }else{
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109 String errMsg = "XML-Document could not be read from InputStream.";
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110 log.error(errMsg);
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111 throw new ExternalCallParserException(errMsg);
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112 }
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113 }else{
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114 String errMsg = "No InputStream given for parsing the Call.";
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115 log.error(errMsg);
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116 throw new ExternalCallParserException(errMsg);
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117 }
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118 }
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119
402
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120 /**
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121 * This Method extracts all Layers and put them into the Collection.
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122 * @param layer
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123 * @param groupId
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124 * @param layerNodes
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125 * @return
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126 */
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127 private Collection<Layer> extractLayer(Collection<Layer> layer, String groupId, NodeList layerNodes){
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128 XMLUtils xmlUtils = new XMLUtils();
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129 for (int i = 0; i < layerNodes.getLength(); i++){
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130 Element layerNode = (Element)layerNodes.item(i);
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131 String id = layerNode.getAttribute(ATTRIBUTE_ID);
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132 String name = layerNode.getAttribute(ATTRIBUTE_NAME);
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133 NodeList localLayerNodes = xmlUtils.getNodeSetXPath(layerNode, XPATH_LAYER);
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134 Layer tmpLayer = new DefaultLayer(id, name,
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135 (localLayerNodes != null &&
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136 localLayerNodes.getLength() > 0),
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137 groupId);
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138 layer.add(tmpLayer);
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139 if (localLayerNodes != null && localLayerNodes.getLength() > 0){
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140 layer = this.extractLayer(layer, id, localLayerNodes);
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141 }
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142 }
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143 return layer;
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144 }
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145
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146 /**
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147 * @see de.intevation.gnv.action.mapviewer.parser.ExternalCallParser#getSRS()
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148 */
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149 public String getSRS() {
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150 return this.srs;
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151 }
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152
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153 }
http://dive4elements.wald.intevation.org