Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/FixingsFacet.java @ 4442:26774405c884

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Introduce a new FixingsFacet to add save access to the current Km Values which are accessed by a String like a map must be checked for null. The new FixingsFacet adds a getCurrentKm method that abstracts the direct access to the CallContext and always returns a valid double value.
author Björn Ricks <bjoern.ricks@intevation.de>
date Wed, 07 Nov 2012 14:06:03 +0100
parents
children b195fede1c3b
rev   line source
4442
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
Björn Ricks <bjoern.ricks@intevation.de>
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1 package de.intevation.flys.artifacts.model.fixings;
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
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2
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
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3 import de.intevation.artifacts.CallContext;
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
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4 import de.intevation.flys.artifacts.model.DataFacet;
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5 import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
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6
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
Björn Ricks <bjoern.ricks@intevation.de>
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7 /**
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
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8 * Facet to access the current Km from the context safely
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
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9 *
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
Björn Ricks <bjoern.ricks@intevation.de>
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10 * @author <a href="mailto:bjoern.ricks@intevation.de">Björn Ricks</a>
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Björn Ricks <bjoern.ricks@intevation.de>
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11 */
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
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12 public class FixingsFacet extends DataFacet {
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13
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14 public static final Double INVALID_KM = Double.valueOf(-1d);
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15 public static final String CURRENT_KM = "currentKm";
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16
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
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17 public FixingsFacet() {
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18 }
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19
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20 public FixingsFacet(String name, String description) {
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
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21 super(0, name, description, ComputeType.ADVANCE, null, null);
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22 }
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23
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24 public FixingsFacet(
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25 int index,
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26 String name,
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27 String description,
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28 ComputeType type,
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29 String hash,
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Björn Ricks <bjoern.ricks@intevation.de>
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30 String stateId
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31 ) {
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Björn Ricks <bjoern.ricks@intevation.de>
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32 super(index, name, description, type, hash, stateId);
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33 }
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34
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35 /**
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36 * Returns the current km from the context.
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37 * If the context is null or doesn't contain a currentKm then a double value of -1 will
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
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38 * be returned.
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39 * @param context The CallContext instance
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40 * @return the current km as double
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41 */
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42 protected double getCurrentKm(CallContext context) {
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43 if (context == null) {
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44 return INVALID_KM;
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45 }
26774405c884 Introduce a new FixingsFacet to add save access to the current Km
Björn Ricks <bjoern.ricks@intevation.de>
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46 Double dkm = (Double)context.getContextValue(CURRENT_KM);
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47 if (dkm == null) {
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48 return INVALID_KM;
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49 }
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50 return dkm.doubleValue();
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51 }
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52 }
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