Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/transitions/ValueCompareTransition.java @ 4655:cd44d28d0fbc

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Move the access to artifact data to the Access object Use BedHeightAccess class to receive the data from the artifact. This abstracts the data access from the actual artifact.
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 11 Dec 2012 09:44:04 +0100
parents eb5564662e19
children
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 /** Setup member values from the document. */
356
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68 @Override
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69 public void init(Node config) {
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70 log.debug("ValueCompareTransition.init");
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71
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72 String tmp = (String) XMLUtils.xpath(
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73 config,
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74 XPATH_OPERATOR,
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75 XPathConstants.STRING);
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76 operator = tmp.trim().toLowerCase();
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77
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78 value = (String) XMLUtils.xpath(
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79 config,
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80 XPATH_VALUE,
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81 XPathConstants.STRING);
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82
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83 dataname = (String) XMLUtils.xpath(
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84 config,
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85 XPATH_DATANAME,
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86 XPathConstants.STRING);
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87 }
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88
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89
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90 @Override
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91 public boolean isValid(Artifact artifact, State a, State b) {
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92 log.debug("ValueCompareTransition.isValid");
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93
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94 FLYSArtifact flysArtifact = (FLYSArtifact) artifact;
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95
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96 StateData dataObj = flysArtifact.getData(dataname);
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97 String dataVal = dataObj != null ? (String) dataObj.getValue() : "";
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98
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99 if (log.isDebugEnabled()) {
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100 log.debug("Compare settings:");
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101 log.debug("-- dataname: " + dataname);
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102 log.debug("-- operator: " + operator);
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103 log.debug("-- compare value: " + value);
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104 log.debug("-- state value: " + dataVal);
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105 }
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106
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107 if (operator.equals(OPERATOR_EQUAL)) {
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108 return value.equals(dataVal);
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109 }
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110 else if (operator.equals(OPERATOR_NOTEQUAL)) {
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111 return !(value.equals(dataVal));
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112 }
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113
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114 log.error("Wrong operator set! No comparison takes place.");
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115
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116 return false;
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117 }
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118 }
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119 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org