Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/transition/ValueCompareTransition.java @ 846:8b6ef091d38c

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It is possible to draw VerticalProfileCharts with just one single data point (issue229). gnv-artifacts/trunk@962 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 21 Apr 2010 08:46:23 +0000
parents 05bf8534a35a
children f953c9a559d8
rev   line source
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a887074460b6 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 :
http://dive4elements.wald.intevation.org