Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/transition/ValueCompareTransition.java @ 1119:7c4f81f74c47
merged gnv-artifacts
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:00 +0200 |
| parents | dec4257ad570 |
| children |
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| 1027:fca4b5eb8d2f | 1119:7c4f81f74c47 |
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| 1 /* | |
| 2 * Copyright (c) 2010 by Intevation GmbH | |
| 3 * | |
| 4 * This program is free software under the LGPL (>=v2.1) | |
| 5 * Read the file LGPL.txt coming with the software for details | |
| 6 * or visit http://www.gnu.org/licenses/ if it does not exist. | |
| 7 */ | |
| 8 | |
| 9 package de.intevation.gnv.transition; | |
| 10 | |
| 11 import java.util.Iterator; | |
| 12 | |
| 13 import org.apache.log4j.Logger; | |
| 14 import org.w3c.dom.Node; | |
| 15 | |
| 16 import de.intevation.artifacts.common.utils.Config; | |
| 17 import de.intevation.gnv.state.InputData; | |
| 18 import de.intevation.gnv.state.State; | |
| 19 import de.intevation.gnv.state.exception.StateException; | |
| 20 | |
| 21 /** | |
| 22 * Class which supports the possibility to validate if a | |
| 23 * Transition could be done using simple Valuecompare Operations. | |
| 24 * At this Time equal and notequal-operations are supported. | |
| 25 * The Comparation is casesensitive. | |
| 26 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> | |
| 27 * | |
| 28 */ | |
| 29 public class ValueCompareTransition extends TransitionBase { | |
| 30 | |
| 31 /** | |
| 32 * the logger, used to log exceptions and additonaly information | |
| 33 */ | |
| 34 private static Logger log = Logger.getLogger(ValueCompareTransition.class); | |
| 35 /** | |
| 36 * The UID of this Class. | |
| 37 */ | |
| 38 private static final long serialVersionUID = -7846722158776823205L; | |
| 39 | |
| 40 /** | |
| 41 * The Name of the Datafield the Value that should be compared | |
| 42 * should be fetched from. | |
| 43 */ | |
| 44 private String dataName = null; | |
| 45 /** | |
| 46 * The Value that should be set to the State. | |
| 47 */ | |
| 48 private String dataValue = null; | |
| 49 /** | |
| 50 * The Operation that should be used (equal notequal) | |
| 51 */ | |
| 52 private String operator = null; | |
| 53 | |
| 54 | |
| 55 /** | |
| 56 * Constructor | |
| 57 */ | |
| 58 public ValueCompareTransition() { | |
| 59 super(); | |
| 60 } | |
| 61 | |
| 62 /** | |
| 63 * validates if a Transition is valid and could be used using simple | |
| 64 * Comparevalue-Operations. | |
| 65 * @see de.intevation.gnv.transition.Transition#isValid(de.intevation.gnv.state.State) | |
| 66 */ | |
| 67 public boolean isValid(State state) { | |
| 68 | |
| 69 try { | |
| 70 Iterator<InputData> it = state.getInputData().iterator(); | |
| 71 while (it.hasNext()){ | |
| 72 InputData inputData = it.next(); | |
| 73 if (inputData.getName().equals(this.dataName)){ | |
| 74 boolean returnValue = false; | |
| 75 if (operator.equals("equal")){ | |
| 76 returnValue = this.dataValue.equals(inputData.getValue()); | |
| 77 }else if (operator.equals("notequal")){ | |
| 78 returnValue = !this.dataValue.equals(inputData.getValue()); | |
| 79 } | |
| 80 return returnValue; | |
| 81 } | |
| 82 } | |
| 83 if (operator.equals("notequal")){ | |
| 84 // data is not given. So the constraint not Equals is fullfilled. | |
| 85 return true; | |
| 86 } | |
| 87 } catch (StateException e) { | |
| 88 log.error(e,e); | |
| 89 return false; | |
| 90 } | |
| 91 return false; | |
| 92 } | |
| 93 | |
| 94 | |
| 95 @Override | |
| 96 public void setup(Node configuration) { | |
| 97 super.setup(configuration); | |
| 98 this.dataName = Config.getStringXPath(configuration,"condition/@inputvalue"); | |
| 99 this.dataValue = Config.getStringXPath(configuration,"condition/@value"); | |
| 100 this.operator = Config.getStringXPath(configuration,"condition/@operator"); | |
| 101 } | |
| 102 } | |
| 103 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |