Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MapInfoService.java @ 3818:dc18457b1cef
merged flys-artifacts/pre2.7-2012-03-16
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:59 +0200 |
| parents | 8284c8fca840 |
| children | 247f3e98a14b |
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| 2456:60ab1054069d | 3818:dc18457b1cef |
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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.DefaultService; | |
| 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 DefaultService { | |
| 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 public Document process( | |
| 80 Document data, | |
| 81 GlobalContext globalContext, | |
| 82 CallMeta callMeta | |
| 83 ) { | |
| 84 logger.debug("MapInfoService.process"); | |
| 85 | |
| 86 Document result = XMLUtils.newDocument(); | |
| 87 ElementCreator cr = new ElementCreator(result, null, null); | |
| 88 | |
| 89 Element mapinfo = cr.create("mapinfo"); | |
| 90 result.appendChild(mapinfo); | |
| 91 | |
| 92 String river = extractRiver(data); | |
| 93 if (river == null || river.length() == 0) { | |
| 94 logger.warn("Cannot generate information: river is empty!"); | |
| 95 return result; | |
| 96 } | |
| 97 | |
| 98 Element root = cr.create("river"); | |
| 99 cr.addAttr(root, "name", river); | |
| 100 mapinfo.appendChild(root); | |
| 101 | |
| 102 Envelope env = GeometryUtils.getRiverBoundary(river); | |
| 103 if (env != null) { | |
| 104 String bounds = GeometryUtils.jtsBoundsToOLBounds(env); | |
| 105 logger.debug("River '" + river + "' bounds: " + bounds); | |
| 106 | |
| 107 Element bbox = cr.create("bbox"); | |
| 108 cr.addAttr(bbox, "value", bounds); | |
| 109 root.appendChild(bbox); | |
| 110 } | |
| 111 | |
| 112 Map<String, String> vars = new HashMap<String, String>(); | |
| 113 vars.put("river", river); | |
| 114 | |
| 115 String sridStr = getStringXPath(XPATH_RIVER_PROJECTION, vars); | |
| 116 | |
| 117 if (sridStr != null && sridStr.length() > 0) { | |
| 118 Element srid = cr.create("srid"); | |
| 119 cr.addAttr(srid, "value", sridStr); | |
| 120 root.appendChild(srid); | |
| 121 } | |
| 122 | |
| 123 Element back = (Element)getNodeXPath(XPATH_RIVER_BACKGROUND, vars); | |
| 124 if (back != null) { | |
| 125 Element background = cr.create("background-wms"); | |
| 126 cr.addAttr(background, "url", back.getAttribute("url")); | |
| 127 cr.addAttr(background, "layers", back.getAttribute("layers")); | |
| 128 root.appendChild(background); | |
| 129 } | |
| 130 | |
| 131 String wmsStr = getStringXPath(XPATH_RIVER_WMS, vars); | |
| 132 if (wmsStr != null && wmsStr.length() > 0) { | |
| 133 Element wms = cr.create("river-wms"); | |
| 134 cr.addAttr(wms, "url", wmsStr); | |
| 135 root.appendChild(wms); | |
| 136 } | |
| 137 | |
| 138 return result; | |
| 139 } | |
| 140 | |
| 141 | |
| 142 protected String extractRiver(Document data) { | |
| 143 return XMLUtils.xpathString( | |
| 144 data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE); | |
| 145 } | |
| 146 } | |
| 147 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |