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annotate artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/templating/DataFromArtifactXPathFunction.java @ 9299:4a6cc7c6716a

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uinfo.inundation_duration veg'zone select
author gernotbelger
date Wed, 25 Jul 2018 14:42:44 +0200
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children e511eb935ccd
rev   line source
9299
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1 /** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by
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3 * Björnsen Beratende Ingenieure GmbH
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4 * Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
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5 *
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6 * This file is Free Software under the GNU AGPL (>=v3)
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7 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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8 * documentation coming with Dive4Elements River for details.
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9 */
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10 package org.dive4elements.river.artifacts.datacage.templating;
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11
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12 import java.util.List;
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13 import java.util.UUID;
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14
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15 import javax.xml.xpath.XPathFunction;
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16 import javax.xml.xpath.XPathFunctionException;
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17
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18 import org.dive4elements.artifactdatabase.data.StateData;
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19 import org.dive4elements.artifacts.CallContext;
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20 import org.dive4elements.river.artifacts.D4EArtifact;
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21 import org.dive4elements.river.utils.RiverUtils;
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22
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23 /**
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24 * Very specialized function the resolves the 'year' (als middle of all used events) from a fix-analysis-vollmer
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25 * artifact).
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26 *
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27 * @author Gernot Belger
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28 */
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29 public class DataFromArtifactXPathFunction implements XPathFunction {
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30
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31 public static final String ID = "data_from_artifact";
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32
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33 public static final int ARITY = 2;
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34
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35 private final CallContext context;
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36
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37 public DataFromArtifactXPathFunction(final CallContext context) {
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38 this.context = context;
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39 }
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40
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41 @Override
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42 public Object evaluate(final List args) throws XPathFunctionException {
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43
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44 final UUID uuid = (UUID) args.get(0);
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45 if (uuid == null)
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46 return null;
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47
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48 final D4EArtifact artifact = RiverUtils.getArtifact(uuid.toString(), this.context);
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49 if (!(args.get(1) instanceof String))
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50 return null;
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51
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52 final StateData data = artifact.getData(args.get(1).toString());
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53 return data.getValue();
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54
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55 }
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56 }
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