Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/GFIServiceImpl.java @ 9801:1d7a72a50183 3.2.x tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Assume Compose V2, consistently
author Tom Gottfried <tom@intevation.de>
date Thu, 23 Nov 2023 10:14:13 +0100
parents 0a5239a1e46e
children
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.logging.log4j.Logger;
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25 import org.apache.logging.log4j.LogManager;
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26
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27 import org.dive4elements.artifacts.common.utils.XMLUtils;
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28
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29 import org.dive4elements.river.client.client.services.GFIService;
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30
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31 import org.dive4elements.river.client.shared.exceptions.ServerException;
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32
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33 import org.dive4elements.river.client.shared.model.AttributedTheme;
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34 import org.dive4elements.river.client.shared.model.FeatureInfo;
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35 import org.dive4elements.river.client.shared.model.FeatureInfoResponse;
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36 import org.dive4elements.river.client.shared.model.Theme;
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37
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38 import org.w3c.dom.Document;
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39 import org.w3c.dom.Node;
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40 import org.w3c.dom.NodeList;
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41
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42 /**
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43 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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44 */
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45 public class GFIServiceImpl
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46 extends RemoteServiceServlet
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47 implements GFIService
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48 {
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49 public static final String ERR_NO_VALID_GFI_URL =
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50 "error_no_valid_gfi_url";
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51
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52 public static final String ERR_GFI_REQUEST_FAILED =
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53 "error_gfi_req_failed";
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54
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55 public static final String ERR_PARSING_RESPONSE_FAILED =
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56 "error_gfi_parsing_failed";
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57
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58
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59 private static final Logger log =
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60 LogManager.getLogger(GFIServiceImpl.class);
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61
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62
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63 /**
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64 * @param theme
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65 * @param format
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66 * @param bbox
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67 * @param height
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68 * @param width
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69 * @param x
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70 * @param y
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71 *
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72 * @return
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73 */
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74 public FeatureInfoResponse query(
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75 Theme theme,
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76 String format,
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77 String bbox,
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78 String projection,
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79 int height,
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80 int width,
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81 int x,
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82 int y
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83 ) throws ServerException
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84 {
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85 log.info("GFIServiceImpl.query");
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86
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87 String path = createGetFeautureInfoURL(
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88 theme, format, bbox, projection, height, width, x, y);
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89
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90 log.debug("URL=" + path);
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91
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92 try {
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93 URL url = new URL(path);
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94
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95 URLConnection conn = url.openConnection();
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96 conn.connect();
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97
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98 InputStream is = conn.getInputStream();
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99
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100 return parseResponse(is);
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101
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102 }
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103 catch (IOException ioe) {
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104 log.warn(ioe, ioe);
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105 }
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106
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107 throw new ServerException(ERR_GFI_REQUEST_FAILED);
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108 }
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109
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110
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111 /**
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112 * @param map
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113 * @param theme
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114 * @param format
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115 * @param x
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116 * @param y
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117 *
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118 * @return
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119 */
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120 protected String createGetFeautureInfoURL(
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121 Theme theme,
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122 String infoFormat,
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123 String bbox,
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124 String projection,
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125 int height,
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126 int width,
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127 int x,
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128 int y
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129 ) throws ServerException
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130 {
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131 String url = getUrl(theme);
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132
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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133 if (url == null || url.length() == 0) {
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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134 throw new ServerException(ERR_NO_VALID_GFI_URL);
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135 }
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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136
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137 String layers = ((AttributedTheme)theme).getAttr("layers");
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138
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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139 StringBuilder sb = new StringBuilder();
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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140 sb.append(url);
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141
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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142 if (url.indexOf("?") < 0) {
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143 sb.append("?SERVICE=WMS");
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144 }
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145 else {
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146 sb.append("&SERVICE=WMS");
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147 }
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148
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149 sb.append("&VERSION=1.1.1");
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150 sb.append("&REQUEST=GetFeatureInfo");
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151 sb.append("&LAYERS=" + layers);
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152 sb.append("&QUERY_LAYERS=" + layers);
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153 sb.append("&BBOX=" + bbox);
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154 sb.append("&HEIGHT=" + height);
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155 sb.append("&WIDTH=" + width);
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156 sb.append("&FORMAT=image/png");
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157 sb.append("&INFO_FORMAT=" + infoFormat);
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158 sb.append("&SRS=" + projection);
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159 sb.append("&X=" + String.valueOf(x));
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160 sb.append("&Y=" + String.valueOf(y));
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161
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162 return sb.toString();
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163 }
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164
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165
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166 protected String getUrl(Theme theme) {
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167 AttributedTheme attr = (AttributedTheme) theme;
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168 return attr.getAttr("url");
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169 }
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170
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171
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172 protected FeatureInfoResponse parseResponse(InputStream is) {
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173 log.debug("GFIServiceImpl.parseResponse");
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174
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175 ByteArrayOutputStream baos = new ByteArrayOutputStream();
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176 byte [] buf = new byte[1024];
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177
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178 int r = -1;
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179 try {
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180 while ((r = is.read(buf)) >= 0) {
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181 baos.write(buf, 0, r);
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182 }
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183 } catch (IOException ex) {
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184 log.warn("GetFeatureInfo response could not be read: ", ex);
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185 return new FeatureInfoResponse();
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186 }
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187
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188 String content;
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189 try {
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190 content = baos.toString("UTF-8");
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191 }
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diff changeset
192 catch (UnsupportedEncodingException uee) {
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193 content = baos.toString();
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194 }
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195
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196 Document response = XMLUtils.parseDocument(content);
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197 if (response != null) {
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198 List<FeatureInfo> features = new ArrayList<FeatureInfo>();
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199 parseFeatureInfos(response, features);
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200 return new FeatureInfoResponse(features, null);
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201 }
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202 // Unable to parse just return the response as is
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diff changeset
203 return new FeatureInfoResponse(new ArrayList<FeatureInfo>(), content);
1402
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diff changeset
204 }
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diff changeset
205
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diff changeset
206
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diff changeset
207 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
208 log.debug("GFIServiceImpl.parseFeatureInfos");
1402
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209
15ef3d3081b7 Parse GetFeatureInfo response on our own and display resulting FeatureInfo objects in the GetFeatureInfoWindow.
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diff changeset
210 String name = node.getNodeName();
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211
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diff changeset
212 if (name.endsWith("_layer")) {
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diff changeset
213 features.add(parseFeature(node));
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214
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diff changeset
215 return;
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diff changeset
216 }
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diff changeset
217
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diff changeset
218 NodeList children = node.getChildNodes();
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diff changeset
219
15ef3d3081b7 Parse GetFeatureInfo response on our own and display resulting FeatureInfo objects in the GetFeatureInfoWindow.
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diff changeset
220 if (children != null && children.getLength() > 0) {
15ef3d3081b7 Parse GetFeatureInfo response on our own and display resulting FeatureInfo objects in the GetFeatureInfoWindow.
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diff changeset
221 for (int i = 0, n = children.getLength(); i < n; i++) {
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parents: 1400
diff changeset
222 parseFeatureInfos(children.item(i), features);
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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
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diff changeset
228 protected FeatureInfo parseFeature(Node node) {
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diff changeset
229 log.debug("GFIServiceImpl.parseFeature");
1402
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230
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diff changeset
231 String layername = node.getNodeName();
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232
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diff changeset
233 FeatureInfo f = new FeatureInfo(layername);
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diff changeset
234
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diff changeset
235 NodeList children = node.getChildNodes();
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diff changeset
236 int numChildren = children != null ? children.getLength() : 0;
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diff changeset
237
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parents: 5993
diff changeset
238 log.debug("Feature '" + layername + "' has " + numChildren + " nodes.");
1402
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diff changeset
239
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diff changeset
240 for (int i = 0; i < numChildren; i++) {
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diff changeset
241 Node tmp = children.item(i);
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diff changeset
242 String nodeName = tmp.getNodeName();
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diff changeset
243
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diff changeset
244 log.debug(" node name: '" + nodeName + "'");
1402
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245
15ef3d3081b7 Parse GetFeatureInfo response on our own and display resulting FeatureInfo objects in the GetFeatureInfoWindow.
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diff changeset
246 if (nodeName.equals("gml:name")) {
8856
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
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diff changeset
247 log.debug("NAME node has child: "
5e38e2924c07 Fix code style.
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diff changeset
248 + tmp.getFirstChild().getNodeValue());
1402
15ef3d3081b7 Parse GetFeatureInfo response on our own and display resulting FeatureInfo objects in the GetFeatureInfoWindow.
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249 f.setLayername(tmp.getFirstChild().getNodeValue());
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250 }
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251 else if (nodeName.endsWith("_feature")) {
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252 parseFeatureAttributes(tmp, f);
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253 }
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254 }
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255
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256 return f;
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257 }
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258
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259
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260 protected void parseFeatureAttributes(Node node, FeatureInfo f) {
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261 log.debug("GFIServiceImpl.parseFeatureAttributes");
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262
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263 NodeList children = node.getChildNodes();
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264 int numChildren = children != null ? children.getLength() : 0;
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265
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266 log.debug("Has " + numChildren + " attributes.");
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267
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268 for (int i = 0; i < numChildren; i++) {
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269 Node tmp = children.item(i);
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270 String name = tmp.getNodeName();
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271
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272 log.debug(" tmp attribute name: '" + name + "'");
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273
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274 if (name.equals("gml:boundedBy")) {
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275 // TODO
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276 }
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277 else {
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278 Node child = tmp.getFirstChild();
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279 if (child != null) {
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280 f.addAttr(name, child.getNodeValue());
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281 }
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282 }
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283 }
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284 }
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96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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285 }
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286 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org