Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromRequestInjector.java @ 8349:7341bebc79d0

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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
rev   line source
8251
c7ca9c228314 Added context injectors for discharge curves.
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1 package org.dive4elements.river.exports.injector;
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2
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3 import org.apache.log4j.Logger;
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4 import org.dive4elements.artifacts.Artifact;
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5 import org.dive4elements.artifacts.ArtifactNamespaceContext;
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6 import org.dive4elements.artifacts.CallContext;
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7 import org.dive4elements.artifacts.ContextInjector;
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8 import org.dive4elements.artifacts.common.utils.XMLUtils;
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9 import org.dive4elements.river.artifacts.D4EArtifact;
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10 import org.dive4elements.river.artifacts.access.RangeAccess;
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11 import org.w3c.dom.Document;
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12 import org.w3c.dom.Element;
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13
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14 import static org.dive4elements.river.exports.injector.InjectorConstants.CURRENT_KM;
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15
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16
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).
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17 public class KmFromRequestInjector
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18 implements ContextInjector
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19 {
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20 private static final Logger log = Logger.getLogger(KmFromRequestInjector.class);
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21
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22 public static final Double INVALID_KM = Double.valueOf(-1d);
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23 public static final String XPATH_CHART_CURRENTKM =
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24 "/art:action/art:attributes/art:currentKm/@art:km";
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25 @Override
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26 public void setup(Element cfg) {
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27
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28 }
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29
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30 @Override
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31 public void injectContext(
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32 CallContext ctx,
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33 Artifact artifact,
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34 Document request) {
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35 Double km = getCurrentKmFromRequest(request);
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10917ec29625 Inject current km and pnp into the context used to calculate W in cm at gauge.
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36 if (Double.isNaN(km)) {
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37 RangeAccess access = new RangeAccess((D4EArtifact)artifact);
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38 km = access.getFrom();
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39 }
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40 ctx.putContextValue(CURRENT_KM, km);
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41 }
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42
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43 private Double getCurrentKmFromRequest(Document request) {
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44
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45 String km = XMLUtils.xpathString(
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46 request,
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47 XPATH_CHART_CURRENTKM,
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48 ArtifactNamespaceContext.INSTANCE);
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49
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50 if (km == null) {
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51 return Double.NaN;
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52 }
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53
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54 try {
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55 return Double.valueOf(km);
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56 }
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57 catch (NumberFormatException nfe) {
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58 return Double.NaN;
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59 }
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60 }
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61 }
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