Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/GFIServiceImpl.java @ 8856:5e38e2924c07 3.2.x

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Fix code style.
author Tom Gottfried <tom@intevation.de>
date Thu, 18 Jan 2018 20:12:01 +0100
parents 238fc722f87a
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();
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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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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diff changeset
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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diff changeset
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);
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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")) {
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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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diff changeset
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 }
1400
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