Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/GFIServiceImpl.java @ 8870:c26fb37899ca

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Introduced groups for modules. Modules marked with the same group-id, will be put together in the ui. Also using now the localization info from the server instead of localizing the modules again on the client side.
author gernotbelger
date Wed, 07 Feb 2018 11:59:13 +0100
parents 5e38e2924c07
children 0a5239a1e46e
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 com.google.gwt.user.server.rpc.RemoteServiceServlet;
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12
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13 import java.io.ByteArrayOutputStream;
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14 import java.io.IOException;
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15 import java.io.InputStream;
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16 import java.io.UnsupportedEncodingException;
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17
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18 import java.net.URL;
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19 import java.net.URLConnection;
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20
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21 import java.util.ArrayList;
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22 import java.util.List;
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23
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24 import org.apache.log4j.Logger;
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25
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26 import org.dive4elements.artifacts.common.utils.XMLUtils;
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27
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28 import org.dive4elements.river.client.client.services.GFIService;
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29
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30 import org.dive4elements.river.client.shared.exceptions.ServerException;
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31
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32 import org.dive4elements.river.client.shared.model.AttributedTheme;
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33 import org.dive4elements.river.client.shared.model.FeatureInfo;
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34 import org.dive4elements.river.client.shared.model.FeatureInfoResponse;
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35 import org.dive4elements.river.client.shared.model.Theme;
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36
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37 import org.w3c.dom.Document;
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38 import org.w3c.dom.Node;
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39 import org.w3c.dom.NodeList;
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40
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41 /**
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42 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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43 */
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44 public class GFIServiceImpl
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45 extends RemoteServiceServlet
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46 implements GFIService
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47 {
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48 public static final String ERR_NO_VALID_GFI_URL =
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49 "error_no_valid_gfi_url";
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50
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51 public static final String ERR_GFI_REQUEST_FAILED =
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52 "error_gfi_req_failed";
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53
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54 public static final String ERR_PARSING_RESPONSE_FAILED =
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55 "error_gfi_parsing_failed";
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56
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57
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58 private static final Logger log =
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59 Logger.getLogger(GFIServiceImpl.class);
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60
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61
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62 /**
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63 * @param theme
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64 * @param format
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65 * @param bbox
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66 * @param height
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67 * @param width
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68 * @param x
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69 * @param y
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70 *
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71 * @return
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72 */
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73 public FeatureInfoResponse query(
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74 Theme theme,
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75 String format,
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76 String bbox,
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77 String projection,
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78 int height,
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79 int width,
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80 int x,
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81 int y
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82 ) throws ServerException
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83 {
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84 log.info("GFIServiceImpl.query");
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85
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86 String path = createGetFeautureInfoURL(
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87 theme, format, bbox, projection, height, width, x, y);
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88
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89 log.debug("URL=" + path);
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90
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91 try {
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92 URL url = new URL(path);
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93
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94 URLConnection conn = url.openConnection();
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95 conn.connect();
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96
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97 InputStream is = conn.getInputStream();
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98
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99 return parseResponse(is);
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100
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101 }
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102 catch (IOException ioe) {
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103 log.warn(ioe, ioe);
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104 }
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105
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106 throw new ServerException(ERR_GFI_REQUEST_FAILED);
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107 }
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108
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109
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110 /**
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111 * @param map
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112 * @param theme
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113 * @param format
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114 * @param x
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115 * @param y
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116 *
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117 * @return
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118 */
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119 protected String createGetFeautureInfoURL(
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120 Theme theme,
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121 String infoFormat,
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122 String bbox,
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123 String projection,
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124 int height,
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125 int width,
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126 int x,
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127 int y
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128 ) throws ServerException
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129 {
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130 String url = getUrl(theme);
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131
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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132 if (url == null || url.length() == 0) {
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133 throw new ServerException(ERR_NO_VALID_GFI_URL);
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134 }
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135
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136 String layers = ((AttributedTheme)theme).getAttr("layers");
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137
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138 StringBuilder sb = new StringBuilder();
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139 sb.append(url);
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140
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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141 if (url.indexOf("?") < 0) {
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142 sb.append("?SERVICE=WMS");
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143 }
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144 else {
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145 sb.append("&SERVICE=WMS");
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146 }
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147
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148 sb.append("&VERSION=1.1.1");
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149 sb.append("&REQUEST=GetFeatureInfo");
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150 sb.append("&LAYERS=" + layers);
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151 sb.append("&QUERY_LAYERS=" + layers);
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152 sb.append("&BBOX=" + bbox);
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153 sb.append("&HEIGHT=" + height);
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154 sb.append("&WIDTH=" + width);
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155 sb.append("&FORMAT=image/png");
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156 sb.append("&INFO_FORMAT=" + infoFormat);
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157 sb.append("&SRS=" + projection);
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158 sb.append("&X=" + String.valueOf(x));
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159 sb.append("&Y=" + String.valueOf(y));
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160
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161 return sb.toString();
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162 }
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163
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164
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165 protected String getUrl(Theme theme) {
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166 AttributedTheme attr = (AttributedTheme) theme;
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167 return attr.getAttr("url");
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168 }
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169
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170
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171 protected FeatureInfoResponse parseResponse(InputStream is) {
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172 log.debug("GFIServiceImpl.parseResponse");
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173
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174 ByteArrayOutputStream baos = new ByteArrayOutputStream();
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175 byte [] buf = new byte[1024];
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176
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177 int r = -1;
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178 try {
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179 while ((r = is.read(buf)) >= 0) {
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180 baos.write(buf, 0, r);
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181 }
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182 } catch (IOException ex) {
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183 log.warn("GetFeatureInfo response could not be read: ", ex);
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184 return new FeatureInfoResponse();
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185 }
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186
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187 String content;
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188 try {
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189 content = baos.toString("UTF-8");
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190 }
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191 catch (UnsupportedEncodingException uee) {
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192 content = baos.toString();
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193 }
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194
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195 Document response = XMLUtils.parseDocument(content);
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196 if (response != null) {
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197 List<FeatureInfo> features = new ArrayList<FeatureInfo>();
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198 parseFeatureInfos(response, features);
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199 return new FeatureInfoResponse(features, null);
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200 }
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201 // Unable to parse just return the response as is
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202 return new FeatureInfoResponse(new ArrayList<FeatureInfo>(), content);
1402
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diff changeset
203 }
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diff changeset
204
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205
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diff changeset
206 protected void parseFeatureInfos(Node node, List<FeatureInfo> features) {
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238fc722f87a sed 's/logger/log/g' src/**/*.java
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diff changeset
207 log.debug("GFIServiceImpl.parseFeatureInfos");
1402
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208
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diff changeset
209 String name = node.getNodeName();
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210
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diff changeset
211 if (name.endsWith("_layer")) {
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diff changeset
212 features.add(parseFeature(node));
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213
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diff changeset
214 return;
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diff changeset
215 }
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diff changeset
216
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diff changeset
217 NodeList children = node.getChildNodes();
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diff changeset
218
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diff changeset
219 if (children != null && children.getLength() > 0) {
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diff changeset
220 for (int i = 0, n = children.getLength(); i < n; i++) {
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parents: 1400
diff changeset
221 parseFeatureInfos(children.item(i), features);
15ef3d3081b7 Parse GetFeatureInfo response on our own and display resulting FeatureInfo objects in the GetFeatureInfoWindow.
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diff changeset
222 }
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diff changeset
223 }
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diff changeset
224 }
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diff changeset
225
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diff changeset
226
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diff changeset
227 protected FeatureInfo parseFeature(Node node) {
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diff changeset
228 log.debug("GFIServiceImpl.parseFeature");
1402
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229
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diff changeset
230 String layername = node.getNodeName();
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231
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diff changeset
232 FeatureInfo f = new FeatureInfo(layername);
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233
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diff changeset
234 NodeList children = node.getChildNodes();
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diff changeset
235 int numChildren = children != null ? children.getLength() : 0;
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diff changeset
236
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diff changeset
237 log.debug("Feature '" + layername + "' has " + numChildren + " nodes.");
1402
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diff changeset
238
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diff changeset
239 for (int i = 0; i < numChildren; i++) {
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diff changeset
240 Node tmp = children.item(i);
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diff changeset
241 String nodeName = tmp.getNodeName();
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diff changeset
242
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diff changeset
243 log.debug(" node name: '" + nodeName + "'");
1402
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244
15ef3d3081b7 Parse GetFeatureInfo response on our own and display resulting FeatureInfo objects in the GetFeatureInfoWindow.
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diff changeset
245 if (nodeName.equals("gml:name")) {
8856
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
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diff changeset
246 log.debug("NAME node has child: "
5e38e2924c07 Fix code style.
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diff changeset
247 + tmp.getFirstChild().getNodeValue());
1402
15ef3d3081b7 Parse GetFeatureInfo response on our own and display resulting FeatureInfo objects in the GetFeatureInfoWindow.
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248 f.setLayername(tmp.getFirstChild().getNodeValue());
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249 }
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250 else if (nodeName.endsWith("_feature")) {
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251 parseFeatureAttributes(tmp, f);
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252 }
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253 }
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254
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255 return f;
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256 }
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257
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258
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259 protected void parseFeatureAttributes(Node node, FeatureInfo f) {
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260 log.debug("GFIServiceImpl.parseFeatureAttributes");
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261
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262 NodeList children = node.getChildNodes();
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263 int numChildren = children != null ? children.getLength() : 0;
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264
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265 log.debug("Has " + numChildren + " attributes.");
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266
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267 for (int i = 0; i < numChildren; i++) {
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268 Node tmp = children.item(i);
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269 String name = tmp.getNodeName();
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270
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271 log.debug(" tmp attribute name: '" + name + "'");
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272
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273 if (name.equals("gml:boundedBy")) {
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274 // TODO
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275 }
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276 else {
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277 Node child = tmp.getFirstChild();
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278 if (child != null) {
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279 f.addAttr(name, child.getNodeValue());
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280 }
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281 }
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282 }
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283 }
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96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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parents:
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284 }
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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285 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org