Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MapInfoService.java @ 3318:dbe2f85bf160
merged flys-artifacts/2.8
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:35 +0200 |
| parents | eb9f7fd77edf |
| children | 8e66293c5369 |
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| 2987:98c7a46ec5ae | 3318:dbe2f85bf160 |
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| 1 package de.intevation.flys.artifacts.services; | |
| 2 | |
| 3 import org.apache.log4j.Logger; | |
| 4 | |
| 5 import java.util.Map; | |
| 6 import java.util.HashMap; | |
| 7 | |
| 8 import org.w3c.dom.Document; | |
| 9 import org.w3c.dom.Node; | |
| 10 import org.w3c.dom.Element; | |
| 11 | |
| 12 import javax.xml.xpath.XPathConstants; | |
| 13 | |
| 14 import com.vividsolutions.jts.geom.Envelope; | |
| 15 | |
| 16 import de.intevation.artifacts.CallMeta; | |
| 17 import de.intevation.artifacts.GlobalContext; | |
| 18 | |
| 19 import de.intevation.artifacts.common.ArtifactNamespaceContext; | |
| 20 import de.intevation.artifacts.common.utils.Config; | |
| 21 import de.intevation.artifacts.common.utils.XMLUtils; | |
| 22 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; | |
| 23 | |
| 24 import de.intevation.artifactdatabase.XMLService; | |
| 25 | |
| 26 import de.intevation.flys.model.River; | |
| 27 | |
| 28 import de.intevation.flys.utils.GeometryUtils; | |
| 29 | |
| 30 /** | |
| 31 * This service provides information about the supported rivers by this | |
| 32 * application. | |
| 33 * | |
| 34 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 35 */ | |
| 36 public class MapInfoService extends XMLService { | |
| 37 | |
| 38 /** XPath that points to the river.*/ | |
| 39 public static final String XPATH_RIVER = "/mapinfo/river/text()"; | |
| 40 | |
| 41 public static final String XPATH_RIVER_PROJECTION = | |
| 42 "/artifact-database/floodmap/river[@name=$river]/srid/@value"; | |
| 43 | |
| 44 public static final String XPATH_RIVER_BACKGROUND = | |
| 45 "/artifact-database/floodmap/river[@name=$river]/background-wms"; | |
| 46 | |
| 47 public static final String XPATH_RIVER_WMS = | |
| 48 "/artifact-database/floodmap/river[@name=$river]/river-wms/@url"; | |
| 49 | |
| 50 | |
| 51 /** The logger used in this service.*/ | |
| 52 private static Logger logger = Logger.getLogger(MapInfoService.class); | |
| 53 | |
| 54 | |
| 55 /** | |
| 56 * The default constructor. | |
| 57 */ | |
| 58 public MapInfoService() { | |
| 59 } | |
| 60 | |
| 61 protected static String getStringXPath( | |
| 62 String query, | |
| 63 Map<String, String> variables | |
| 64 ) { | |
| 65 return (String)XMLUtils.xpath( | |
| 66 Config.getConfig(), query, XPathConstants.STRING, | |
| 67 null, variables); | |
| 68 } | |
| 69 | |
| 70 protected static Node getNodeXPath( | |
| 71 String query, | |
| 72 Map<String, String> variables | |
| 73 ) { | |
| 74 return (Node)XMLUtils.xpath( | |
| 75 Config.getConfig(), query, XPathConstants.NODE, | |
| 76 null, variables); | |
| 77 } | |
| 78 | |
| 79 @Override | |
| 80 public Document processXML( | |
| 81 Document data, | |
| 82 GlobalContext globalContext, | |
| 83 CallMeta callMeta | |
| 84 ) { | |
| 85 logger.debug("MapInfoService.process"); | |
| 86 | |
| 87 Document result = XMLUtils.newDocument(); | |
| 88 ElementCreator cr = new ElementCreator(result, null, null); | |
| 89 | |
| 90 Element mapinfo = cr.create("mapinfo"); | |
| 91 result.appendChild(mapinfo); | |
| 92 | |
| 93 String river = extractRiver(data); | |
| 94 if (river == null || river.length() == 0) { | |
| 95 logger.warn("Cannot generate information: river is empty!"); | |
| 96 return result; | |
| 97 } | |
| 98 | |
| 99 Element root = cr.create("river"); | |
| 100 cr.addAttr(root, "name", river); | |
| 101 mapinfo.appendChild(root); | |
| 102 | |
| 103 Envelope env = GeometryUtils.getRiverBoundary(river); | |
| 104 if (env != null) { | |
| 105 String bounds = GeometryUtils.jtsBoundsToOLBounds(env); | |
| 106 logger.debug("River '" + river + "' bounds: " + bounds); | |
| 107 | |
| 108 Element bbox = cr.create("bbox"); | |
| 109 cr.addAttr(bbox, "value", bounds); | |
| 110 root.appendChild(bbox); | |
| 111 } | |
| 112 | |
| 113 Map<String, String> vars = new HashMap<String, String>(); | |
| 114 vars.put("river", river); | |
| 115 | |
| 116 String sridStr = getStringXPath(XPATH_RIVER_PROJECTION, vars); | |
| 117 | |
| 118 if (sridStr != null && sridStr.length() > 0) { | |
| 119 Element srid = cr.create("srid"); | |
| 120 cr.addAttr(srid, "value", sridStr); | |
| 121 root.appendChild(srid); | |
| 122 } | |
| 123 | |
| 124 Element back = (Element)getNodeXPath(XPATH_RIVER_BACKGROUND, vars); | |
| 125 if (back != null) { | |
| 126 Element background = cr.create("background-wms"); | |
| 127 cr.addAttr(background, "url", back.getAttribute("url")); | |
| 128 cr.addAttr(background, "layers", back.getAttribute("layers")); | |
| 129 root.appendChild(background); | |
| 130 } | |
| 131 | |
| 132 String wmsStr = getStringXPath(XPATH_RIVER_WMS, vars); | |
| 133 if (wmsStr != null && wmsStr.length() > 0) { | |
| 134 Element wms = cr.create("river-wms"); | |
| 135 cr.addAttr(wms, "url", wmsStr); | |
| 136 root.appendChild(wms); | |
| 137 } | |
| 138 | |
| 139 return result; | |
| 140 } | |
| 141 | |
| 142 | |
| 143 protected String extractRiver(Document data) { | |
| 144 return XMLUtils.xpathString( | |
| 145 data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE); | |
| 146 } | |
| 147 } | |
| 148 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |