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> |
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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 : |