Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/services/MapInfoService.java @ 5838:5aa05a7a34b7

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Rename modules to more fitting names.
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 15:23:37 +0200
parents flys-artifacts/src/main/java/org/dive4elements/river/artifacts/services/MapInfoService.java@bd047b71ab37
children 4897a58c8746
rev   line source
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1 package org.dive4elements.river.artifacts.services;
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2
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3 import com.vividsolutions.jts.geom.Envelope;
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4
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5 import org.dive4elements.artifactdatabase.XMLService;
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6 import org.dive4elements.artifacts.CallMeta;
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7 import org.dive4elements.artifacts.GlobalContext;
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8 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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9 import org.dive4elements.artifacts.common.utils.Config;
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10 import org.dive4elements.artifacts.common.utils.XMLUtils;
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11 import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
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12 import org.dive4elements.river.utils.GeometryUtils;
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13
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14 import java.util.HashMap;
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15 import java.util.Map;
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16
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17 import javax.xml.xpath.XPathConstants;
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18
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19 import org.apache.log4j.Logger;
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20 import org.w3c.dom.Document;
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21 import org.w3c.dom.Element;
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22 import org.w3c.dom.Node;
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23
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24 /**
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25 * This service provides information about the supported rivers by this
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26 * application.
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27 *
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28 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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29 */
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30 public class MapInfoService extends XMLService {
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31
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32 /** XPath that points to the river.*/
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33 public static final String XPATH_RIVER = "/mapinfo/river/text()";
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34
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35 public static final String XPATH_MAPTYPE = "/mapinfo/maptype/text()";
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36
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37 private static final String XPATH_RIVER_PROJECTION =
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38 "/artifact-database/*[local-name()=$maptype]/river[@name=$river]/srid/@value";
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39
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40 private static final String XPATH_RIVER_BACKGROUND =
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41 "/artifact-database/*[local-name()=$maptype]/river[@name=$river]/background-wms";
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42
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43 private static final String XPATH_RIVER_WMS =
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44 "/artifact-database/*[local-name()=$maptype]/river[@name=$river]/river-wms";
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45
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46
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47 /** The logger used in this service.*/
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48 private static Logger logger = Logger.getLogger(MapInfoService.class);
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49
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50
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51 /**
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52 * The default constructor.
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53 */
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54 public MapInfoService() {
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55 }
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56
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57 protected static String getStringXPath(
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58 String query,
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59 Map<String, String> variables
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60 ) {
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61 return (String)XMLUtils.xpath(
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62 Config.getConfig(), query, XPathConstants.STRING,
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63 null, variables);
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64 }
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65
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66 protected static Node getNodeXPath(
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67 String query,
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68 Map<String, String> variables
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69 ) {
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70 return (Node)XMLUtils.xpath(
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71 Config.getConfig(), query, XPathConstants.NODE,
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72 null, variables);
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73 }
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74
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75 @Override
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76 public Document processXML(
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77 Document data,
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78 GlobalContext globalContext,
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79 CallMeta callMeta
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80 ) {
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81 logger.debug("MapInfoService.process");
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82
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83 Document result = XMLUtils.newDocument();
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84 ElementCreator cr = new ElementCreator(result, null, null);
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85
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86 Element mapinfo = cr.create("mapinfo");
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87 result.appendChild(mapinfo);
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88
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89 String river = extractRiver(data);
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90 if (river == null || river.length() == 0) {
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91 logger.warn("Cannot generate information: river is empty!");
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92 return result;
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93 }
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94
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95 String mapType = extractMaptype(data);
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96 if (mapType == null
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97 || !(mapType.equals("floodmap") || mapType.equals("rivermap"))) {
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98 mapType = "floodmap";
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99 }
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100
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101 Element root = cr.create("river");
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102 cr.addAttr(root, "name", river);
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103 mapinfo.appendChild(root);
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104
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105 Envelope env = GeometryUtils.getRiverBoundary(river);
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106 if (env != null) {
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107 String bounds = GeometryUtils.jtsBoundsToOLBounds(env);
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108 if (logger.isDebugEnabled()) {
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109 logger.debug("River '" + river + "' bounds: " + bounds);
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110 }
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111
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112 Element bbox = cr.create("bbox");
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113 cr.addAttr(bbox, "value", bounds);
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114 root.appendChild(bbox);
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115 }
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116
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117 Map<String, String> vars = new HashMap<String, String>();
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118 vars.put("maptype", mapType);
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119 vars.put("river", river);
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120
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121 String sridStr = getStringXPath(XPATH_RIVER_PROJECTION, vars);
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122
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123 if (sridStr != null && sridStr.length() > 0) {
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124 Element srid = cr.create("srid");
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125 cr.addAttr(srid, "value", sridStr);
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126 root.appendChild(srid);
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127 }
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128
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129 if (logger.isDebugEnabled()) {
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130 logger.debug("processXML: " + XMLUtils.toString(root));
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131 }
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132
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133 root.appendChild(
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134 createWMSElement("background-wms",
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135 XPATH_RIVER_BACKGROUND, vars, cr));
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136
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137 root.appendChild(
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138 createWMSElement("river-wms",
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139 XPATH_RIVER_WMS, vars, cr));
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140
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141 return result;
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142 }
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143
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144
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145 protected Element createWMSElement(
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146 String elementName,
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147 String xpath,
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148 Map<String, String> vars,
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149 ElementCreator cr)
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150 {
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151 logger.debug("createWMSElement()");
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152
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153 Element el = cr.create(elementName);
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154 Element wms = (Element)getNodeXPath(xpath, vars);
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155
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156 if (wms != null) {
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157 cr.addAttr(el, "url", wms.getAttribute("url"));
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158 cr.addAttr(el, "layers", wms.getAttribute("layers"));
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159
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160 logger.debug("createWMSElement: " + XMLUtils.toString(el));
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161 }
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162 else {
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163 logger.debug("createWMSElement: wms == null");
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164 }
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165
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166 return el;
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167 }
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168
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169
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170 private static String extractRiver(Document data) {
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171 return XMLUtils.xpathString(
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172 data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE);
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173 }
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174
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175 private static String extractMaptype(Document data) {
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176 return XMLUtils.xpathString(
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177 data, XPATH_MAPTYPE, ArtifactNamespaceContext.INSTANCE);
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178 }
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179 }
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180 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org