Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/transition/ValueCompareTransition.java @ 859:3fbabd4803d7
ISSUE252 Make it possible to export more than one Layer
gnv-artifacts/trunk@983 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Tim Englich <tim.englich@intevation.de> |
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date | Mon, 26 Apr 2010 09:09:20 +0000 |
parents | 05bf8534a35a |
children | f953c9a559d8 |
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Last Step of the Refactoring Work on the Transition Model.
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1 package de.intevation.gnv.transition; |
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2 |
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3 import java.util.Iterator; |
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4 |
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5 import org.apache.log4j.Logger; |
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6 import org.w3c.dom.Node; |
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7 |
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8 import de.intevation.artifactdatabase.Config; |
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9 import de.intevation.gnv.state.InputData; |
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10 import de.intevation.gnv.state.State; |
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11 import de.intevation.gnv.state.exception.StateException; |
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12 |
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13 /** |
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14 * Class which supports the possibility to validate if a |
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15 * Transition could be done using simple Valuecompare Operations. |
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16 * At this Time equal and notequal-operations are supported. |
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17 * The Comparation is casesensitive. |
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18 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> |
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19 * |
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20 */ |
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21 public class ValueCompareTransition extends TransitionBase { |
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22 |
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23 /** |
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24 * the logger, used to log exceptions and additonaly information |
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25 */ |
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26 private static Logger log = Logger.getLogger(ValueCompareTransition.class); |
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27 /** |
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28 * The UID of this Class. |
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29 */ |
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30 private static final long serialVersionUID = -7846722158776823205L; |
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31 |
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32 /** |
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33 * The Name of the Datafield the Value that should be compared |
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34 * should be fetched from. |
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35 */ |
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36 private String dataName = null; |
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37 /** |
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38 * The Value that should be set to the State. |
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39 */ |
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40 private String dataValue = null; |
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41 /** |
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42 * The Operation that should be used (equal notequal) |
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43 */ |
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44 private String operator = null; |
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45 |
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46 |
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47 /** |
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48 * Constructor |
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49 */ |
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50 public ValueCompareTransition() { |
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51 super(); |
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52 } |
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53 |
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54 /** |
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55 * validates if a Transition is valid and could be used using simple |
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56 * Comparevalue-Operations. |
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57 * @see de.intevation.gnv.transition.Transition#isValid(de.intevation.gnv.state.State) |
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58 */ |
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59 public boolean isValid(State state) { |
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60 |
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61 try { |
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62 Iterator<InputData> it = state.getInputData().iterator(); |
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63 while (it.hasNext()){ |
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64 InputData inputData = it.next(); |
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65 if (inputData.getName().equals(this.dataName)){ |
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66 boolean returnValue = false; |
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67 if (operator.equals("equal")){ |
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68 returnValue = this.dataValue.equals(inputData.getValue()); |
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69 }else if (operator.equals("notequal")){ |
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70 returnValue = !this.dataValue.equals(inputData.getValue()); |
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71 } |
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72 return returnValue; |
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73 } |
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74 } |
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75 if (operator.equals("notequal")){ |
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76 // data is not given. So the constraint not Equals is fullfilled. |
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77 return true; |
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78 } |
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79 } catch (StateException e) { |
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80 log.error(e,e); |
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81 return false; |
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82 } |
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83 return false; |
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84 } |
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85 |
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86 |
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87 @Override |
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88 public void setup(Node configuration) { |
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89 super.setup(configuration); |
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90 this.dataName = Config.getStringXPath(configuration,"condition/@inputvalue"); |
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91 this.dataValue = Config.getStringXPath(configuration,"condition/@value"); |
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92 this.operator = Config.getStringXPath(configuration,"condition/@operator"); |
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93 } |
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94 } |
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95 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |