Mercurial > dive4elements > river
comparison artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromRequestInjector.java @ 8349:7341bebc79d0
Let injectors be strictly distinct from each other and give more meaningful names (they know what they do, not where they will be used. The latter is configuration).
| author | Tom Gottfried <tom@intevation.de> |
|---|---|
| date | Wed, 01 Oct 2014 12:23:39 +0200 |
| parents | artifacts/src/main/java/org/dive4elements/river/exports/injector/FixWQInjector.java@10917ec29625 |
| children | 16dc2da05aef |
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| 8348:dc3f55141299 | 8349:7341bebc79d0 |
|---|---|
| 1 package org.dive4elements.river.exports.injector; | |
| 2 | |
| 3 import org.apache.log4j.Logger; | |
| 4 import org.dive4elements.artifacts.Artifact; | |
| 5 import org.dive4elements.artifacts.ArtifactNamespaceContext; | |
| 6 import org.dive4elements.artifacts.CallContext; | |
| 7 import org.dive4elements.artifacts.ContextInjector; | |
| 8 import org.dive4elements.artifacts.common.utils.XMLUtils; | |
| 9 import org.dive4elements.river.artifacts.D4EArtifact; | |
| 10 import org.dive4elements.river.artifacts.access.RangeAccess; | |
| 11 import org.w3c.dom.Document; | |
| 12 import org.w3c.dom.Element; | |
| 13 | |
| 14 import static org.dive4elements.river.exports.injector.InjectorConstants.CURRENT_KM; | |
| 15 | |
| 16 | |
| 17 public class KmFromRequestInjector | |
| 18 implements ContextInjector | |
| 19 { | |
| 20 private static final Logger log = Logger.getLogger(KmFromRequestInjector.class); | |
| 21 | |
| 22 public static final Double INVALID_KM = Double.valueOf(-1d); | |
| 23 public static final String XPATH_CHART_CURRENTKM = | |
| 24 "/art:action/art:attributes/art:currentKm/@art:km"; | |
| 25 @Override | |
| 26 public void setup(Element cfg) { | |
| 27 | |
| 28 } | |
| 29 | |
| 30 @Override | |
| 31 public void injectContext( | |
| 32 CallContext ctx, | |
| 33 Artifact artifact, | |
| 34 Document request) { | |
| 35 Double km = getCurrentKmFromRequest(request); | |
| 36 if (Double.isNaN(km)) { | |
| 37 RangeAccess access = new RangeAccess((D4EArtifact)artifact); | |
| 38 km = access.getFrom(); | |
| 39 } | |
| 40 ctx.putContextValue(CURRENT_KM, km); | |
| 41 } | |
| 42 | |
| 43 private Double getCurrentKmFromRequest(Document request) { | |
| 44 | |
| 45 String km = XMLUtils.xpathString( | |
| 46 request, | |
| 47 XPATH_CHART_CURRENTKM, | |
| 48 ArtifactNamespaceContext.INSTANCE); | |
| 49 | |
| 50 if (km == null) { | |
| 51 return Double.NaN; | |
| 52 } | |
| 53 | |
| 54 try { | |
| 55 return Double.valueOf(km); | |
| 56 } | |
| 57 catch (NumberFormatException nfe) { | |
| 58 return Double.NaN; | |
| 59 } | |
| 60 } | |
| 61 } |