Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java @ 301:1a00cb4998a8
Implemented a service that retrieves distance information for a specific river.
flys-artifacts/trunk@1660 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Mon, 11 Apr 2011 12:54:03 +0000 |
| parents | |
| children | aeeb9054b7cf |
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| 300:9a0e1289bab6 | 301:1a00cb4998a8 |
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| 1 package de.intevation.flys.artifacts.services; | |
| 2 | |
| 3 import java.math.BigDecimal; | |
| 4 import java.util.List; | |
| 5 | |
| 6 import org.apache.log4j.Logger; | |
| 7 | |
| 8 import org.w3c.dom.Document; | |
| 9 import org.w3c.dom.Element; | |
| 10 | |
| 11 import de.intevation.artifacts.CallMeta; | |
| 12 | |
| 13 import de.intevation.artifacts.common.ArtifactNamespaceContext; | |
| 14 import de.intevation.artifacts.common.utils.XMLUtils; | |
| 15 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; | |
| 16 | |
| 17 import de.intevation.artifactdatabase.DefaultService; | |
| 18 | |
| 19 import de.intevation.flys.model.Annotation; | |
| 20 import de.intevation.flys.model.Attribute; | |
| 21 import de.intevation.flys.model.Position; | |
| 22 import de.intevation.flys.model.Range; | |
| 23 | |
| 24 import de.intevation.flys.artifacts.model.AnnotationsFactory; | |
| 25 | |
| 26 | |
| 27 /** | |
| 28 * This service provides information about distances of a specified river. | |
| 29 * | |
| 30 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 31 */ | |
| 32 public class DistanceInfoService extends DefaultService { | |
| 33 | |
| 34 /** The logger used in this service.*/ | |
| 35 private static Logger logger = Logger.getLogger(DistanceInfoService.class); | |
| 36 | |
| 37 | |
| 38 /** | |
| 39 * The default constructor. | |
| 40 */ | |
| 41 public DistanceInfoService() { | |
| 42 } | |
| 43 | |
| 44 | |
| 45 public Document process( | |
| 46 Document data, | |
| 47 Object globalContext, | |
| 48 CallMeta callMeta) | |
| 49 { | |
| 50 logger.debug("DistanceInfoService.process"); | |
| 51 | |
| 52 Document result = XMLUtils.newDocument(); | |
| 53 | |
| 54 String river = XMLUtils.xpathString( | |
| 55 data, "/art:river/text()", ArtifactNamespaceContext.INSTANCE); | |
| 56 | |
| 57 if (river == null || river.trim().length() == 0) { | |
| 58 logger.warn("No river specified. Cannot return distance info!"); | |
| 59 return result; | |
| 60 } | |
| 61 | |
| 62 logger.debug("Search distances for river: " + river); | |
| 63 | |
| 64 ElementCreator ec = new ElementCreator( | |
| 65 result, | |
| 66 ArtifactNamespaceContext.NAMESPACE_URI, | |
| 67 ArtifactNamespaceContext.NAMESPACE_PREFIX); | |
| 68 | |
| 69 List<Annotation> annotations = AnnotationsFactory.getAnnotations(river); | |
| 70 | |
| 71 if (annotations == null || annotations.size() == 0) { | |
| 72 logger.warn("No information found for the specified river!"); | |
| 73 return result; | |
| 74 } | |
| 75 | |
| 76 Element all = ec.create("distances"); | |
| 77 | |
| 78 for (Annotation a: annotations) { | |
| 79 Element distance = buildDistanceNode(ec, a); | |
| 80 | |
| 81 if (distance != null) { | |
| 82 all.appendChild(distance); | |
| 83 } | |
| 84 } | |
| 85 | |
| 86 result.appendChild(all); | |
| 87 | |
| 88 return result; | |
| 89 } | |
| 90 | |
| 91 | |
| 92 /** | |
| 93 * This method build an Element for a distance info. | |
| 94 * | |
| 95 * @param ec The ElementCreator. | |
| 96 * @param anno The Annotation that provides information about the distance. | |
| 97 * | |
| 98 * @return an Element that contains information about a distance. | |
| 99 */ | |
| 100 protected Element buildDistanceNode(ElementCreator ec, Annotation anno) { | |
| 101 Position pos = anno.getPosition(); | |
| 102 Range range = anno.getRange(); | |
| 103 Attribute attr = anno.getAttribute(); | |
| 104 | |
| 105 BigDecimal a = range.getA(); | |
| 106 BigDecimal b = range.getB(); | |
| 107 | |
| 108 Element distance = ec.create("distance"); | |
| 109 ec.addAttr(distance, "description", pos.getValue(), true); | |
| 110 ec.addAttr(distance, "from", a != null ? a.toString() : "", true); | |
| 111 ec.addAttr(distance, "to", b != null ? b.toString() : "", true); | |
| 112 ec.addAttr(distance, "riverside", attr.getValue(), true); | |
| 113 | |
| 114 return distance; | |
| 115 } | |
| 116 } | |
| 117 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |