Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java @ 2424:092e519ff461
merged flys-artifacts/2.6.1
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:26 +0200 |
| parents | e92bc9b0ca1d |
| children | df4d6b286af8 |
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| 2392:8112ec686a9a | 2424:092e519ff461 |
|---|---|
| 1 package de.intevation.flys.artifacts.services; | |
| 2 | |
| 3 import java.util.Iterator; | |
| 4 | |
| 5 import org.apache.log4j.Logger; | |
| 6 | |
| 7 import org.w3c.dom.Document; | |
| 8 import org.w3c.dom.Element; | |
| 9 | |
| 10 import de.intevation.artifacts.CallMeta; | |
| 11 import de.intevation.artifacts.GlobalContext; | |
| 12 | |
| 13 import de.intevation.artifacts.common.ArtifactNamespaceContext; | |
| 14 import de.intevation.artifacts.common.utils.XMLUtils; | |
| 15 | |
| 16 import de.intevation.flys.model.FastAnnotations; | |
| 17 | |
| 18 import de.intevation.flys.artifacts.model.LocationProvider; | |
| 19 | |
| 20 | |
| 21 /** | |
| 22 * This service provides information about distances of a specified river. | |
| 23 * | |
| 24 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 25 */ | |
| 26 public class DistanceInfoService extends FLYSService { | |
| 27 | |
| 28 /** The logger used in this service. */ | |
| 29 private static Logger logger = Logger.getLogger(DistanceInfoService.class); | |
| 30 | |
| 31 public static final String RIVER_XPATH = "/art:river/text()"; | |
| 32 | |
| 33 public static final String FILTER_XPATH = "/art:river/art:filter/text()"; | |
| 34 | |
| 35 | |
| 36 /** | |
| 37 * The default constructor. | |
| 38 */ | |
| 39 public DistanceInfoService() { | |
| 40 } | |
| 41 | |
| 42 | |
| 43 @Override | |
| 44 public Document doProcess( | |
| 45 Document data, | |
| 46 GlobalContext globalContext, | |
| 47 CallMeta callMeta | |
| 48 ) { | |
| 49 logger.debug("DistanceInfoService.process"); | |
| 50 | |
| 51 String river = XMLUtils.xpathString( | |
| 52 data, RIVER_XPATH, ArtifactNamespaceContext.INSTANCE); | |
| 53 | |
| 54 String filterName = XMLUtils.xpathString( | |
| 55 data, FILTER_XPATH, ArtifactNamespaceContext.INSTANCE); | |
| 56 | |
| 57 if (river == null || (river = river.trim()).length() == 0) { | |
| 58 logger.warn("No river specified. Cannot return distance info!"); | |
| 59 return XMLUtils.newDocument(); | |
| 60 } | |
| 61 | |
| 62 logger.debug("Search distances for river: " + river); | |
| 63 | |
| 64 FastAnnotations fas = LocationProvider.getAnnotations(river); | |
| 65 | |
| 66 FastAnnotations.Filter filter = selectFilter(filterName); | |
| 67 | |
| 68 return buildDocument(fas.filter(filter)); | |
| 69 } | |
| 70 | |
| 71 protected Document buildDocument( | |
| 72 Iterator<FastAnnotations.Annotation> iter | |
| 73 ) { | |
| 74 Document result = XMLUtils.newDocument(); | |
| 75 | |
| 76 Element all = result.createElement("distances"); | |
| 77 | |
| 78 while (iter.hasNext()) { | |
| 79 all.appendChild(buildNode(result, iter.next())); | |
| 80 } | |
| 81 | |
| 82 result.appendChild(all); | |
| 83 | |
| 84 return result; | |
| 85 } | |
| 86 | |
| 87 protected static FastAnnotations.Filter selectFilter(String name) { | |
| 88 | |
| 89 if (name != null) { | |
| 90 if ("locations".equals(name)) return FastAnnotations.IS_POINT; | |
| 91 if ("distances".equals(name)) return FastAnnotations.IS_RANGE; | |
| 92 } | |
| 93 | |
| 94 return FastAnnotations.ALL; | |
| 95 } | |
| 96 | |
| 97 /** | |
| 98 * Builds an Element for a distance info. | |
| 99 * | |
| 100 * @param an The Annotation that provides information about the distance. | |
| 101 * | |
| 102 * @return an Element that contains information about a distance. | |
| 103 */ | |
| 104 protected static Element buildNode( | |
| 105 Document document, | |
| 106 FastAnnotations.Annotation an | |
| 107 ) { | |
| 108 Element distance = document.createElement("distance"); | |
| 109 | |
| 110 distance.setAttribute("description", an.getPosition()); | |
| 111 | |
| 112 String riverSide = an.getAttribute(); | |
| 113 | |
| 114 if (riverSide != null && riverSide.length() > 0) { | |
| 115 distance.setAttribute("riverside", riverSide); | |
| 116 } | |
| 117 | |
| 118 distance.setAttribute("from", String.valueOf(an.getA())); | |
| 119 | |
| 120 double b = an.getB(); | |
| 121 double bottom = an.getBottom(); | |
| 122 double top = an.getTop(); | |
| 123 | |
| 124 if (!Double.isNaN(b)) { | |
| 125 distance.setAttribute("to", String.valueOf(b)); | |
| 126 } | |
| 127 | |
| 128 if (!Double.isNaN(bottom)) { | |
| 129 distance.setAttribute("bottom", String.valueOf(bottom)); | |
| 130 } | |
| 131 | |
| 132 if (!Double.isNaN(top)) { | |
| 133 distance.setAttribute("top", String.valueOf(top)); | |
| 134 } | |
| 135 | |
| 136 return distance; | |
| 137 } | |
| 138 } | |
| 139 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |