Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/transitions/ValueCompareTransition.java @ 2089:0da8874bd378

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Added initial state to map artifact to be able to advance and step back. The map artifact overrides describe() to have the complete UI information in the describe response document. flys-artifacts/trunk@3613 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Raimund Renkert <raimund.renkert@intevation.de>
date Fri, 06 Jan 2012 12:02:10 +0000
parents 22e9574c8b1b
children eb5564662e19
rev   line source
356
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1 package de.intevation.flys.artifacts.transitions;
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2
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3 import javax.xml.xpath.XPathConstants;
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4
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5 import org.apache.log4j.Logger;
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6
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7 import org.w3c.dom.Node;
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8
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9 import de.intevation.artifacts.Artifact;
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10
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11 import de.intevation.artifactdatabase.data.StateData;
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12 import de.intevation.artifactdatabase.state.State;
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13
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14 import de.intevation.artifacts.common.utils.XMLUtils;
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15
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16 import de.intevation.flys.artifacts.FLYSArtifact;
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17
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18
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19 /**
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20 * This transition compares data objects with a <i>equal</i> or <i>notequal</i>
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21 * operator.
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22 *
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23 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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24 */
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25 public class ValueCompareTransition extends DefaultTransition {
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26
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27 /** The logger that is used in this transition.*/
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28 private static Logger log = Logger.getLogger(ValueCompareTransition.class);
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29
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30
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31 /** XPath that points to the condition's operator.*/
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32 public static final String XPATH_OPERATOR = "condition/@operator";
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33
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34 /** XPath that points to the condition's value.*/
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35 public static final String XPATH_VALUE = "condition/@value";
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36
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37 /** XPath that points to the condition's dataname.*/
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38 public static final String XPATH_DATANAME = "condition/@data";
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39
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40 /** The value of the 'equal' operator.*/
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41 public static final String OPERATOR_EQUAL = "equal";
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42
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43 /** The value of the 'not equal' operator.*/
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44 public static final String OPERATOR_NOTEQUAL = "notequal";
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45
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46
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47 /** The operator.*/
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48 protected String operator;
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49
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50 /** The value used for comparison.*/
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51 protected String value;
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52
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53 /** The name of the data used for the comparison.*/
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54 protected String dataname;
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55
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56
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57
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58 public ValueCompareTransition() {
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59 }
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60
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61
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62 public ValueCompareTransition(String from, String to) {
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63 super(from, to);
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64 }
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65
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66
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67 @Override
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68 public void init(Node config) {
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69 log.debug("ValueCompareTransition.init");
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70
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71 String tmp = (String) XMLUtils.xpath(
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72 config,
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73 XPATH_OPERATOR,
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74 XPathConstants.STRING);
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75 operator = tmp.trim().toLowerCase();
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76
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77 value = (String) XMLUtils.xpath(
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78 config,
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79 XPATH_VALUE,
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80 XPathConstants.STRING);
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81
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82 dataname = (String) XMLUtils.xpath(
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83 config,
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84 XPATH_DATANAME,
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85 XPathConstants.STRING);
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86 }
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87
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88
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89 @Override
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90 public boolean isValid(Artifact artifact, State a, State b) {
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91 log.debug("ValueCompareTransition.isValid");
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92
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93 FLYSArtifact flysArtifact = (FLYSArtifact) artifact;
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94
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95 StateData dataObj = flysArtifact.getData(dataname);
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96 String dataVal = dataObj != null ? (String) dataObj.getValue() : "";
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97
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98 if (log.isDebugEnabled()) {
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99 log.debug("Compare settings:");
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100 log.debug("-- dataname: " + dataname);
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101 log.debug("-- operator: " + operator);
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102 log.debug("-- compare value: " + value);
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103 log.debug("-- state value: " + dataVal);
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104 }
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105
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106 if (operator.equals(OPERATOR_EQUAL)) {
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107 return value.equals(dataVal);
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108 }
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109 else if (operator.equals(OPERATOR_NOTEQUAL)) {
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110 return !(value.equals(dataVal));
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111 }
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112
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113 log.error("Wrong operator set! No comparison takes place.");
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114
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115 return false;
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116 }
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117 }
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118 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org