Mercurial > dive4elements > river

annotate flys-client/src/main/java/org/dive4elements/river/client/server/GFIServiceImpl.java @ 5835:821a02bbfb4e

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Fixed internal java dependencies
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 13:12:15 +0200
parents f507086aa94b
children
rev   line source
5835
821a02bbfb4e Fixed internal java dependencies
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5834
diff changeset
1 package org.dive4elements.river.client.server;
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3 import java.io.InputStream;
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4 import java.io.UnsupportedEncodingException;
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5 import java.io.ByteArrayOutputStream;
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6 import java.io.IOException;
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7 import java.net.URL;
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8 import java.net.URLConnection;
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9 import java.util.ArrayList;
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10 import java.util.List;
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11 import java.util.Scanner;
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12
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13 import org.w3c.dom.Document;
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14 import org.w3c.dom.Node;
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15 import org.w3c.dom.NodeList;
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16
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17 import org.apache.log4j.Logger;
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18
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19 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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20
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21 import org.dive4elements.artifacts.common.utils.XMLUtils;
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22
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23 import org.dive4elements.river.client.shared.exceptions.ServerException;
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24 import org.dive4elements.river.client.shared.model.AttributedTheme;
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25 import org.dive4elements.river.client.shared.model.FeatureInfo;
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26 import org.dive4elements.river.client.shared.model.FeatureInfoResponse;
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27 import org.dive4elements.river.client.shared.model.Theme;
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28
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29 import org.dive4elements.river.client.client.services.GFIService;
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31
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32 /**
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33 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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34 */
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35 public class GFIServiceImpl
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36 extends RemoteServiceServlet
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37 implements GFIService
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38 {
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39 public static final String ERR_NO_VALID_GFI_URL =
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40 "error_no_valid_gfi_url";
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41
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42 public static final String ERR_GFI_REQUEST_FAILED =
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43 "error_gfi_req_failed";
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44
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45 public static final String ERR_PARSING_RESPONSE_FAILED =
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46 "error_gfi_parsing_failed";
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47
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48
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49 private static final Logger logger =
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50 Logger.getLogger(GFIServiceImpl.class);
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51
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52
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53 /**
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54 * @param theme
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55 * @param format
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56 * @param bbox
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57 * @param height
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58 * @param width
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59 * @param x
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60 * @param y
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61 *
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62 * @return
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63 */
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64 public FeatureInfoResponse query(
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65 Theme theme,
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66 String format,
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67 String bbox,
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68 String projection,
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69 int height,
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70 int width,
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71 int x,
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72 int y
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73 ) throws ServerException
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74 {
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75 logger.info("GFIServiceImpl.query");
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76
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77 String path = createGetFeautureInfoURL(
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78 theme, format, bbox, projection, height, width, x, y);
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79
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80 logger.debug("URL=" + path);
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81
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82 try {
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83 URL url = new URL(path);
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84
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85 URLConnection conn = url.openConnection();
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86 conn.connect();
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87
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88 InputStream is = conn.getInputStream();
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89
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90 return parseResponse(is);
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91
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92 }
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93 catch (IOException ioe) {
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94 logger.warn(ioe, ioe);
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95 }
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96
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97 throw new ServerException(ERR_GFI_REQUEST_FAILED);
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98 }
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99
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100
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101 /**
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102 * @param map
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103 * @param theme
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104 * @param format
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105 * @param x
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106 * @param y
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107 *
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108 * @return
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109 */
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110 protected String createGetFeautureInfoURL(
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111 Theme theme,
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112 String infoFormat,
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113 String bbox,
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114 String projection,
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115 int height,
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116 int width,
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117 int x,
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118 int y
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119 ) throws ServerException
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120 {
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121 String url = getUrl(theme);
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122
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123 if (url == null || url.length() == 0) {
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124 throw new ServerException(ERR_NO_VALID_GFI_URL);
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125 }
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126
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127 String layers = ((AttributedTheme)theme).getAttr("layers");
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128
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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129 StringBuilder sb = new StringBuilder();
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130 sb.append(url);
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131
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132 if (url.indexOf("?") < 0) {
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133 sb.append("?SERVICE=WMS");
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134 }
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135 else {
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136 sb.append("&SERVICE=WMS");
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137 }
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138
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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139 sb.append("&VERSION=1.1.1");
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140 sb.append("&REQUEST=GetFeatureInfo");
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141 sb.append("&LAYERS=" + layers);
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142 sb.append("&QUERY_LAYERS=" + layers);
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143 sb.append("&BBOX=" + bbox);
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144 sb.append("&HEIGHT=" + height);
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145 sb.append("&WIDTH=" + width);
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146 sb.append("&FORMAT=image/png");
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147 sb.append("&INFO_FORMAT=" + infoFormat);
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148 sb.append("&SRS=" + projection);
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149 sb.append("&X=" + String.valueOf(x));
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150 sb.append("&Y=" + String.valueOf(y));
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151
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152 return sb.toString();
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153 }
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154
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155
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156 protected String getUrl(Theme theme) {
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157 AttributedTheme attr = (AttributedTheme) theme;
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158 return attr.getAttr("url");
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159 }
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160
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161
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162 protected FeatureInfoResponse parseResponse(InputStream is) {
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163 logger.debug("GFIServiceImpl.parseResponse");
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164
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165 ByteArrayOutputStream baos = new ByteArrayOutputStream();
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166 byte [] buf = new byte[1024];
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167
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168 int r = -1;
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169 try {
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170 while ((r = is.read(buf)) >= 0) {
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171 baos.write(buf, 0, r);
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172 }
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173 } catch (IOException ex) {
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174 logger.warn("GetFeatureInfo response could not be read: ", ex);
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175 return new FeatureInfoResponse();
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176 }
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177
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178 String content;
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179 try {
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180 content = baos.toString("UTF-8");
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181 }
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182 catch (UnsupportedEncodingException uee) {
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183 content = baos.toString();
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184 }
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185
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186 Document response = XMLUtils.parseDocument(content);
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187 if (response != null) {
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188 List<FeatureInfo> features = new ArrayList<FeatureInfo>();
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189 parseFeatureInfos(response, features);
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190 return new FeatureInfoResponse(features, null);
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191 }
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192 // Unable to parse just return the response as is
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193 return new FeatureInfoResponse(new ArrayList<FeatureInfo>(), content);
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194 }
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195
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196
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197 protected void parseFeatureInfos(Node node, List<FeatureInfo> features) {
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198 logger.debug("GFIServiceImpl.parseFeatureInfos");
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199
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200 String name = node.getNodeName();
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201
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diff changeset
202 if (name.endsWith("_layer")) {
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203 features.add(parseFeature(node));
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204
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diff changeset
205 return;
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206 }
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207
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diff changeset
208 NodeList children = node.getChildNodes();
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209
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diff changeset
210 if (children != null && children.getLength() > 0) {
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211 for (int i = 0, n = children.getLength(); i < n; i++) {
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diff changeset
212 parseFeatureInfos(children.item(i), features);
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213 }
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214 }
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215 }
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216
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217
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diff changeset
218 protected FeatureInfo parseFeature(Node node) {
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219 logger.debug("GFIServiceImpl.parseFeature");
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220
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diff changeset
221 String layername = node.getNodeName();
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222
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223 FeatureInfo f = new FeatureInfo(layername);
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224
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diff changeset
225 NodeList children = node.getChildNodes();
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226 int numChildren = children != null ? children.getLength() : 0;
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227
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diff changeset
228 logger.debug("Feature '" + layername + "' has " + numChildren + " nodes.");
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229
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diff changeset
230 for (int i = 0; i < numChildren; i++) {
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diff changeset
231 Node tmp = children.item(i);
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diff changeset
232 String nodeName = tmp.getNodeName();
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233
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diff changeset
234 logger.debug(" node name: '" + nodeName + "'");
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235
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diff changeset
236 if (nodeName.equals("gml:name")) {
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diff changeset
237 logger.debug("NAME node has child: " + tmp.getFirstChild().getNodeValue());
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diff changeset
238 f.setLayername(tmp.getFirstChild().getNodeValue());
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diff changeset
239 }
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diff changeset
240 else if (nodeName.endsWith("_feature")) {
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diff changeset
241 parseFeatureAttributes(tmp, f);
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242 }
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243 }
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244
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diff changeset
245 return f;
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246 }
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247
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248
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249 protected void parseFeatureAttributes(Node node, FeatureInfo f) {
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250 logger.debug("GFIServiceImpl.parseFeatureAttributes");
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251
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252 NodeList children = node.getChildNodes();
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253 int numChildren = children != null ? children.getLength() : 0;
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254
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255 logger.debug("Has " + numChildren + " attributes.");
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256
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257 for (int i = 0; i < numChildren; i++) {
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258 Node tmp = children.item(i);
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259 String name = tmp.getNodeName();
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260
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261 logger.debug(" tmp attribute name: '" + name + "'");
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262
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263 if (name.equals("gml:boundedBy")) {
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264 // TODO
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265 }
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266 else {
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267 Node child = tmp.getFirstChild();
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268 if (child != null) {
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269 f.addAttr(name, child.getNodeValue());
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270 }
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271 }
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272 }
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273 }
1400
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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parents:
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274 }
96708d81eaf6 Added an initial GetFeatureInfo tool to get information about points in the map.
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parents:
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275 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org