Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromRequestInjector.java @ 8856:5e38e2924c07 3.2.x

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Fix code style.
author Tom Gottfried <tom@intevation.de>
date Thu, 18 Jan 2018 20:12:01 +0100
parents 16dc2da05aef
children a805211690f7
rev   line source
8251
c7ca9c228314 Added context injectors for discharge curves.
Raimund Renkert <rrenkert@intevation.de>
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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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5e38e2924c07 Fix code style.
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20 private static final Logger log = Logger.getLogger(
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21 KmFromRequestInjector.class);
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22
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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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16dc2da05aef Overwriting the current km in context gives unexpected results if artifacts from different km have been loaded.
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34 Document request
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35 ) {
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36 if (ctx.getContextValue(CURRENT_KM) instanceof Number) {
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37 return;
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38 }
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39
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40 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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41 if (Double.isNaN(km)) {
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42 RangeAccess access = new RangeAccess((D4EArtifact)artifact);
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43 km = access.getFrom();
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44 }
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45 ctx.putContextValue(CURRENT_KM, km);
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46 }
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47
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48 private Double getCurrentKmFromRequest(Document request) {
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49
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50 String km = XMLUtils.xpathString(
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51 request,
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52 XPATH_CHART_CURRENTKM,
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53 ArtifactNamespaceContext.INSTANCE);
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54
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55 if (km == null) {
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56 return Double.NaN;
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57 }
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58
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59 try {
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60 return Double.valueOf(km);
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61 }
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62 catch (NumberFormatException nfe) {
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63 return Double.NaN;
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64 }
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65 }
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66 }
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