Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MapInfoService.java @ 5013:eecd1ebba128 dami
SCHEMA CHANGE: removed obsolete table 'lines' from spatial schema (now 'hws_lines')
author | Tom Gottfried <tom.gottfried@intevation.de> |
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date | Tue, 19 Feb 2013 09:57:57 +0100 |
parents | a06e443f159a |
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rev | line source |
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Implemented a MapInfo service that returns some basic information to create maps for specific rivers.
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parents:
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1 package de.intevation.flys.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 de.intevation.artifactdatabase.XMLService; |
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6 import de.intevation.artifacts.CallMeta; |
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7 import de.intevation.artifacts.GlobalContext; |
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8 import de.intevation.artifacts.common.ArtifactNamespaceContext; |
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9 import de.intevation.artifacts.common.utils.Config; |
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10 import de.intevation.artifacts.common.utils.XMLUtils; |
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11 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; |
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12 import de.intevation.flys.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 : |