Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/transition/ValueCompareTransition.java @ 1129:ccfa07b88476

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merged geo-backend
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:01 +0200
parents dec4257ad570
children
rev   line source
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.transition;
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10
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11 import java.util.Iterator;
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12
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13 import org.apache.log4j.Logger;
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14 import org.w3c.dom.Node;
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15
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16 import de.intevation.artifacts.common.utils.Config;
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17 import de.intevation.gnv.state.InputData;
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18 import de.intevation.gnv.state.State;
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19 import de.intevation.gnv.state.exception.StateException;
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20
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21 /**
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22 * Class which supports the possibility to validate if a
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23 * Transition could be done using simple Valuecompare Operations.
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24 * At this Time equal and notequal-operations are supported.
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25 * The Comparation is casesensitive.
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26 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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27 *
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28 */
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29 public class ValueCompareTransition extends TransitionBase {
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30
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31 /**
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32 * the logger, used to log exceptions and additonaly information
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33 */
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34 private static Logger log = Logger.getLogger(ValueCompareTransition.class);
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35 /**
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36 * The UID of this Class.
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37 */
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38 private static final long serialVersionUID = -7846722158776823205L;
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39
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40 /**
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41 * The Name of the Datafield the Value that should be compared
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42 * should be fetched from.
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43 */
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44 private String dataName = null;
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45 /**
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46 * The Value that should be set to the State.
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47 */
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48 private String dataValue = null;
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49 /**
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50 * The Operation that should be used (equal notequal)
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51 */
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52 private String operator = null;
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53
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54
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55 /**
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56 * Constructor
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57 */
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58 public ValueCompareTransition() {
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59 super();
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60 }
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61
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62 /**
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63 * validates if a Transition is valid and could be used using simple
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64 * Comparevalue-Operations.
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65 * @see de.intevation.gnv.transition.Transition#isValid(de.intevation.gnv.state.State)
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66 */
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67 public boolean isValid(State state) {
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68
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69 try {
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70 Iterator<InputData> it = state.getInputData().iterator();
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71 while (it.hasNext()){
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72 InputData inputData = it.next();
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73 if (inputData.getName().equals(this.dataName)){
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74 boolean returnValue = false;
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75 if (operator.equals("equal")){
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76 returnValue = this.dataValue.equals(inputData.getValue());
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77 }else if (operator.equals("notequal")){
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78 returnValue = !this.dataValue.equals(inputData.getValue());
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79 }
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80 return returnValue;
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81 }
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82 }
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83 if (operator.equals("notequal")){
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84 // data is not given. So the constraint not Equals is fullfilled.
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85 return true;
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86 }
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87 } catch (StateException e) {
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88 log.error(e,e);
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89 return false;
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90 }
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91 return false;
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92 }
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93
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94
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95 @Override
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96 public void setup(Node configuration) {
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97 super.setup(configuration);
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98 this.dataName = Config.getStringXPath(configuration,"condition/@inputvalue");
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99 this.dataValue = Config.getStringXPath(configuration,"condition/@value");
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100 this.operator = Config.getStringXPath(configuration,"condition/@operator");
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101 }
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102 }
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103 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org