Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/transition/ValueCompareTransition.java @ 773:5fb1ea68e19c

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Avoid danger to get a NullPointerException if no time to live is served by CallContext. gnv-artifacts/trunk@832 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 26 Mar 2010 09:55:28 +0000
parents a887074460b6
children 9a828e5a2390
rev   line source
337
a887074460b6 Last Step of the Refactoring Work on the Transition Model.
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1 /**
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2 *
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3 */
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4 package de.intevation.gnv.transition;
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5
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6 import java.util.Iterator;
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7
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8 import org.apache.log4j.Logger;
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9 import org.w3c.dom.Node;
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10
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11 import de.intevation.artifactdatabase.Config;
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12 import de.intevation.gnv.state.InputData;
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13 import de.intevation.gnv.state.State;
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14 import de.intevation.gnv.state.exception.StateException;
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15
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16 /**
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17 * @author Tim Englich <tim.englich@intevation.de>
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18 *
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19 */
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20 public class ValueCompareTransition extends TransitionBase {
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21
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22 /**
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23 * the logger, used to log exceptions and additonaly information
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24 */
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25 private static Logger log = Logger.getLogger(ValueCompareTransition.class);
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26
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27 private String dataName = null;
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28 private String dataValue = null;
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29 private String operator = null;
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30
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31 /**
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32 * The UID of this Class.
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33 */
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34 private static final long serialVersionUID = -7846722158776823205L;
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35
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36 /**
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37 * Constructor
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38 */
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39 public ValueCompareTransition() {
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40 super();
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41 }
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42
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43 /**
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44 * @see de.intevation.gnv.transition.Transition#isValid(de.intevation.gnv.state.State)
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45 */
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46 public boolean isValid(State state) {
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47
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48 try {
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49 Iterator<InputData> it = state.getInputData().iterator();
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50 while (it.hasNext()){
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51 InputData inputData = it.next();
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52 if (inputData.getName().equals(this.dataName)){
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53 boolean returnValue = false;
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54 if (operator.equals("equal")){
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55 returnValue = this.dataValue.equals(inputData.getValue());
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56 }else if (operator.equals("notequal")){
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57 returnValue = !this.dataValue.equals(inputData.getValue());
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58 }
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59 return returnValue;
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60 }
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61 }
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62 if (operator.equals("notequal")){
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63 // data is not given. So the constraint not Equals is fullfilled.
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64 return true;
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65 }
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66 } catch (StateException e) {
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67 log.error(e,e);
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68 return false;
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69 }
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70 return false;
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71 }
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72
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73 @Override
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74 public void setup(Node configuration) {
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75 super.setup(configuration);
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76 this.dataName = Config.getStringXPath(configuration,"condition/@inputvalue");
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77 this.dataValue = Config.getStringXPath(configuration,"condition/@value");
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78 this.operator = Config.getStringXPath(configuration,"condition/@operator");
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79 }
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80
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81
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82 }
http://dive4elements.wald.intevation.org