annotate gwt-client/src/main/java/org/dive4elements/river/client/server/CapabilitiesParser.java @ 8806:fc54202a4b1e

Do not use configuration EntityResolver here. Fixes a regression of a change in framework behaviour reported in issue1864.
author Tom Gottfried <tom@intevation.de>
date Wed, 03 Feb 2016 18:35:18 +0100
parents 238fc722f87a
children 5e38e2924c07
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.client.server;
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10
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11 import org.dive4elements.artifacts.common.utils.XMLUtils;
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12 import org.dive4elements.river.client.shared.exceptions.ServerException;
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13 import org.dive4elements.river.client.shared.model.Capabilities;
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14 import org.dive4elements.river.client.shared.model.ContactInformation;
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15 import org.dive4elements.river.client.shared.model.WMSLayer;
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16
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17 import java.io.IOException;
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18 import java.io.InputStream;
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19 import java.net.MalformedURLException;
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20 import java.net.URL;
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21 import java.net.URLConnection;
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22 import java.util.ArrayList;
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23 import java.util.List;
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24 import java.util.regex.Matcher;
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25 import java.util.regex.Pattern;
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27 import javax.xml.xpath.XPathConstants;
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28
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29 import org.apache.log4j.Logger;
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30 import org.w3c.dom.Document;
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31 import org.w3c.dom.Element;
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32 import org.w3c.dom.Node;
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33 import org.w3c.dom.NodeList;
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34
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35 /**
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36 * Parser for GetCapabilities of a WMS.
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37 */
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38 public class CapabilitiesParser {
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39
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40 private static final Logger log =
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41 Logger.getLogger(CapabilitiesParser.class);
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43
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44 public static final String ERR_GC_REQUEST_FAILED =
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45 "error_gc_req_failed";
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46
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47 public static final String ERR_GC_DOC_NOT_VALID =
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48 "error_gc_doc_not_valid";
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49
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50 public static final String ERR_MALFORMED_URL =
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51 "error_malformed_url";
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52
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53
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54 public static final String XPATH_WMS_CAPS =
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55 "/WMS_Capabilities";
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56
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57 public static final String XPATH_WMT_CAPS =
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58 "/WMT_MS_Capabilities";
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59
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60 public static final String XPATH_TITLE =
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61 "Service/Title/text()";
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62
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63 public static final String XPATH_ONLINE_RESOURCE =
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64 "Service/OnlineResource/@href";
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65
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66 public static final String XPATH_CONTACT_INFORMATION =
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67 "Service/ContactInformation";
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68
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69 public static final String XPATH_CI_PERSON =
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70 "ContactPersonPrimary/ContactPerson/text()";
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71
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72 public static final String XPATH_CI_ORGANIZATION =
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73 "ContactPersonPrimary/ContactOrganization/text()";
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74
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75 public static final String XPATH_CI_ADDRESS =
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76 "ContactAddress/Address/text()";
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78 public static final String XPATH_CI_CITY =
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79 "ContactAddress/City/text()";
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81 public static final String XPATH_CI_POSTCODE =
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82 "ContactAddress/PostCode/text()";
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84 public static final String XPATH_CI_PHONE =
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85 "ContactVoiceTelephone/text()";
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87 public static final String XPATH_CI_EMAIL =
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88 "ContactElectronicMailAddress/text()";
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90 public static final String XPATH_FEES =
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91 "Service/Fees/text()";
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92
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93 public static final String XPATH_ACCESS_CONSTRAINTS =
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94 "Service/AccessConstraints/text()";
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95
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96 public static final String XPATH_LAYERS =
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97 "Capability/Layer";
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98
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99 public static final String XPATH_MAP_FORMAT =
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100 "Capability/Request/GetMap/Format";
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101
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102 public static final String XPATH_GETMAP_ONLINERESOURCE =
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103 "Capability/Request/GetMap/DCPType/HTTP/Get/OnlineResource/@href";
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104
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105 public static final Pattern SRS_PATTERN = Pattern.compile("(EPSG:\\d+)*");
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107
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108 private CapabilitiesParser() {
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109 }
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110
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111
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112 public static void main(String[] args) {
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113 log.info("Do static Capabilities request/parsing.");
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114
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115 String log4jProperties = System.getenv(BaseServletContextListener.LOG4J_PROPERTIES);
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116 LoggingConfigurator.init(log4jProperties);
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117
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118 try {
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119 String wmsURL = System.getProperty("test.wms");
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120 if (wmsURL == null || args.length > 0) {
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121 wmsURL = args[0];
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122 }
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123 Capabilities caps = getCapabilities(wmsURL);
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124
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125 log.debug(caps.toString());
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126 System.out.println(caps.toString());
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127 }
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128 catch (ServerException se) {
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129 se.printStackTrace();
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130 }
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131
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132 log.info("Finished fetching capabiltiies.");
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133 }
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134
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135
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136 public static Capabilities getCapabilities(String urlStr)
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137 throws ServerException
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138 {
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139 try {
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140 URL url = new URL(urlStr);
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141
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142 log.debug("Open connection to url: " + urlStr);
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143
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144 URLConnection conn = url.openConnection();
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145 conn.connect();
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146
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147 InputStream is = conn.getInputStream();
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148
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149 return parse(is);
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150 }
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151 catch (MalformedURLException mue) {
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152 log.warn(mue, mue);
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153 throw new ServerException(ERR_MALFORMED_URL);
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154 }
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155 catch (IOException ioe) {
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156 log.warn(ioe, ioe);
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157 }
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158
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159 throw new ServerException(ERR_GC_REQUEST_FAILED);
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160 }
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161
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162
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163 protected static Capabilities parse(InputStream is)
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164 throws ServerException
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165 {
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166 Document doc = XMLUtils.parseDocument(is, false, null);
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167
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168 if (doc == null) {
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169 throw new ServerException(ERR_GC_DOC_NOT_VALID);
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170 }
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171
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172 return CapabilitiesParser.parse(doc);
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173 }
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174
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175
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176 public static Capabilities parse(Document doc)
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177 throws ServerException
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178 {
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179 Node capabilities = getCapabilitiesNode(doc);
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180
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181 String title = (String) XMLUtils.xpath(
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182 capabilities,
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183 XPATH_TITLE,
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184 XPathConstants.STRING);
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185
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186 String onlineResource = (String) XMLUtils.xpath(
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187 capabilities,
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188 XPATH_ONLINE_RESOURCE,
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189 XPathConstants.STRING);
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190
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191 String fees = (String) XMLUtils.xpath(
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192 capabilities,
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193 XPATH_FEES,
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194 XPathConstants.STRING);
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195
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196 String accessConstraints = (String) XMLUtils.xpath(
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197 capabilities,
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198 XPATH_ACCESS_CONSTRAINTS,
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199 XPathConstants.STRING);
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200
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201 Node contactInformation = (Node) XMLUtils.xpath(
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202 capabilities,
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203 XPATH_CONTACT_INFORMATION,
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204 XPathConstants.NODE);
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205
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206 ContactInformation ci = parseContactInformation(contactInformation);
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207
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208 log.debug("Found fees: " + fees);
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209 log.debug("Found access constraints: " + accessConstraints);
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210
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211 NodeList layerNodes = (NodeList) XMLUtils.xpath(
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212 capabilities,
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213 XPATH_LAYERS,
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214 XPathConstants.NODESET);
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215
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216 String getMapOnlineResource = (String) XMLUtils.xpath(
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217 capabilities,
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218 XPATH_GETMAP_ONLINERESOURCE,
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diff changeset
219 XPathConstants.STRING);
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220
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221 List<WMSLayer> layers = parseLayers(layerNodes, getMapOnlineResource);
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222
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223 // Parse MIME types of supported return types, e.g. image/jpeg
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224 NodeList mapFormatNodes = (NodeList)
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225 XMLUtils.xpath(capabilities, XPATH_MAP_FORMAT, XPathConstants.NODESET);
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226 List<String> mapFormats = new ArrayList<String>();
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227 for (int n = 0; n < mapFormatNodes.getLength(); n++) {
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228 mapFormats.add(mapFormatNodes.item(n).getTextContent());
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229 }
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230
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231 return new Capabilities(
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232 title,
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233 onlineResource,
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234 ci,
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235 fees,
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236 accessConstraints,
6198
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237 layers,
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Christian Lins <christian.lins@intevation.de>
parents: 5993
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238 mapFormats);
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239 }
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240
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241
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242 protected static Node getCapabilitiesNode(Document doc)
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243 throws ServerException {
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244 Node capabilities = (Node) XMLUtils.xpath(
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245 doc,
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246 XPATH_WMS_CAPS,
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247 XPathConstants.NODE);
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248
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249 if (capabilities == null) {
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250 log.info("No '/WMS_Capabilities' node found.");
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parents: 6831
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251 log.info("Try to find a '/WMT_MS_Capabilities' node.");
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252
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253 capabilities = (Node) XMLUtils.xpath(
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254 doc,
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255 XPATH_WMT_CAPS,
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256 XPathConstants.NODE);
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257 }
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258
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259 if (capabilities == null) {
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260 throw new ServerException(ERR_GC_DOC_NOT_VALID);
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261 }
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262
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263 return capabilities;
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264 }
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265
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266
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267 protected static ContactInformation parseContactInformation(Node node) {
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268 String person = (String) XMLUtils.xpath(
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269 node,
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270 XPATH_CI_PERSON,
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271 XPathConstants.STRING);
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272
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273 String organization = (String) XMLUtils.xpath(
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274 node,
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275 XPATH_CI_ORGANIZATION,
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276 XPathConstants.STRING);
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277
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278 String address = (String) XMLUtils.xpath(
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279 node,
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280 XPATH_CI_ADDRESS,
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281 XPathConstants.STRING);
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parents:
diff changeset
282
42d6cf6e10b7 Moved code to parse WMS Capabilities to an own class 'CapabilitiesParser' and added code to parse SRS definitions.
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283 String postcode = (String) XMLUtils.xpath(
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parents:
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284 node,
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285 XPATH_CI_POSTCODE,
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parents:
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286 XPathConstants.STRING);
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287
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288 String city = (String) XMLUtils.xpath(
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289 node,
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290 XPATH_CI_CITY,
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291 XPathConstants.STRING);
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292
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293 String phone = (String) XMLUtils.xpath(
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294 node,
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295 XPATH_CI_PHONE,
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296 XPathConstants.STRING);
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297
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298 String email = (String) XMLUtils.xpath(
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299 node,
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300 XPATH_CI_EMAIL,
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301 XPathConstants.STRING);
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302
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303 ContactInformation ci = new ContactInformation();
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304 ci.setPerson(person);
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305 ci.setOrganization(organization);
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306 ci.setAddress(address);
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diff changeset
307 ci.setPostcode(postcode);
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308 ci.setCity(city);
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309 ci.setPhone(phone);
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310 ci.setEmail(email);
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311
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312 return ci;
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313 }
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314
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315
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316 /**
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317 * @param layersNode
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318 * @param onlineResource
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319 *
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320 * @return
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321 */
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322 protected static List<WMSLayer> parseLayers(
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323 NodeList layersNode,
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324 String onlineResource
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325 ) {
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326 int len = layersNode != null ? layersNode.getLength() : 0;
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327
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328 log.debug("Node has " + len + " layers.");
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329
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330 List<WMSLayer> layers = new ArrayList<WMSLayer>(len);
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331
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332 for (int i = 0; i < len; i++) {
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333 layers.add(parseLayer(layersNode.item(i), onlineResource));
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334 }
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335
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336 return layers;
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337 }
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338
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339
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340 protected static WMSLayer parseLayer(Node layerNode, String onlineResource) {
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341 String title = (String) XMLUtils.xpath(
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342 layerNode,
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343 "Title/text()",
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344 XPathConstants.STRING);
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345
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346 String name = (String) XMLUtils.xpath(
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347 layerNode,
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348 "Name/text()",
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349 XPathConstants.STRING);
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350
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351 log.debug("Found layer: " + title + "(" + name + ")");
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352
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353 boolean queryable = true;
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354 Node queryableAttr = layerNode.getAttributes().getNamedItem("queryable");
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355 if (queryableAttr != null && queryableAttr.getNodeValue().equals("0")) {
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356 queryable = false;
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357 }
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358
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359 List<String> srs = parseSRS(layerNode);
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360
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361 NodeList layersNodes = (NodeList) XMLUtils.xpath(
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362 layerNode,
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363 "Layer",
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364 XPathConstants.NODESET);
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365
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366 List<WMSLayer> layers = parseLayers(layersNodes, onlineResource);
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367
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368 return new WMSLayer(onlineResource, title, name, srs, layers, queryable);
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369 }
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370
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371
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372 protected static List<String> parseSRS(Node layerNode) {
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373 NodeList srsNodes = ((Element) layerNode).getElementsByTagName("SRS");
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374
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375 if (srsNodes.getLength() == 0) {
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376 srsNodes = ((Element) layerNode).getElementsByTagName("CRS");
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377
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378 if (srsNodes.getLength() == 0) {
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379 log.debug("No explicit SRS for this layer specified.");
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380 return null;
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381 }
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382 }
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383
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384 List<String> allSRS = new ArrayList<String>();
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385
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386 for (int i = 0, n = srsNodes.getLength(); i < n; i++) {
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387 List<String> srs = parseSRSItem(srsNodes.item(i).getTextContent());
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388
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389 if (srs != null && srs.size() > 0) {
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390 allSRS.addAll(srs);
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391 }
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392 }
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393
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394 return allSRS;
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395 }
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396
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397
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398 protected static List<String> parseSRSItem(String srsStr) {
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399 if (srsStr == null || srsStr.length() == 0) {
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400 return null;
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diff changeset
401 }
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diff changeset
402
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diff changeset
403 List<String> allSRS = new ArrayList<String>();
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diff changeset
404
23ffee639f7c #431 Added support for WMS 1.3.0 projection definitions.
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diff changeset
405 if (srsStr.indexOf(" ") <= 0) {
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diff changeset
406 String srs = getSRSFromString(srsStr);
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diff changeset
407 if (srs != null && srs.length() > 0) {
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diff changeset
408 allSRS.add(srs);
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diff changeset
409 }
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diff changeset
410
23ffee639f7c #431 Added support for WMS 1.3.0 projection definitions.
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diff changeset
411 return allSRS;
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diff changeset
412 }
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diff changeset
413
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diff changeset
414 String[] splittedSrs = srsStr.split(" ");
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parents:
diff changeset
415
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diff changeset
416 for (String singleSrs: splittedSrs) {
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417 String srs = getSRSFromString(singleSrs);
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diff changeset
418 if (srs != null && srs.length() > 0) {
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diff changeset
419 allSRS.add(srs);
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diff changeset
420 }
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diff changeset
421 }
42d6cf6e10b7 Moved code to parse WMS Capabilities to an own class 'CapabilitiesParser' and added code to parse SRS definitions.
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parents:
diff changeset
422
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423 return allSRS;
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diff changeset
424 }
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diff changeset
425
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diff changeset
426
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diff changeset
427 protected static String getSRSFromString(String singleSrs) {
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parents: 1487
diff changeset
428 Matcher m = SRS_PATTERN.matcher(singleSrs);
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diff changeset
429
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diff changeset
430 if (m.matches()) {
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431 log.debug("Found SRS '" + m.group(1) + "'");
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432 return m.group(1);
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433 }
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diff changeset
434
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diff changeset
435 return null;
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parents:
diff changeset
436 }
42d6cf6e10b7 Moved code to parse WMS Capabilities to an own class 'CapabilitiesParser' and added code to parse SRS definitions.
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parents:
diff changeset
437 }
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parents:
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http://dive4elements.wald.intevation.org