Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/transitions/ValueCompareTransition.java @ 5867:59ff03ff48f1

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River artifacts: Renamed FLYSArtifact(Collection) to D4EArtifact(Collection).
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 15:23:01 +0200
parents 4897a58c8746
children af13ceeba52a
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.artifacts.transitions;
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10
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11 import javax.xml.xpath.XPathConstants;
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12
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13 import org.apache.log4j.Logger;
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14
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15 import org.w3c.dom.Node;
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16
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17 import org.dive4elements.artifacts.Artifact;
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18
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19 import org.dive4elements.artifactdatabase.data.StateData;
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20 import org.dive4elements.artifactdatabase.state.State;
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21
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22 import org.dive4elements.artifacts.common.utils.XMLUtils;
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23
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24 import org.dive4elements.river.artifacts.D4EArtifact;
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25
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26
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27 /**
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28 * This transition compares data objects with a <i>equal</i> or <i>notequal</i>
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29 * operator.
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30 *
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31 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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32 */
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33 public class ValueCompareTransition extends DefaultTransition {
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34
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35 /** The logger that is used in this transition.*/
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36 private static Logger log = Logger.getLogger(ValueCompareTransition.class);
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37
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38
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39 /** XPath that points to the condition's operator.*/
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40 public static final String XPATH_OPERATOR = "condition/@operator";
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41
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42 /** XPath that points to the condition's value.*/
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43 public static final String XPATH_VALUE = "condition/@value";
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44
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45 /** XPath that points to the condition's dataname.*/
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46 public static final String XPATH_DATANAME = "condition/@data";
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47
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48 /** The value of the 'equal' operator.*/
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49 public static final String OPERATOR_EQUAL = "equal";
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50
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51 /** The value of the 'not equal' operator.*/
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52 public static final String OPERATOR_NOTEQUAL = "notequal";
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53
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54
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55 /** The operator.*/
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56 protected String operator;
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57
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58 /** The value used for comparison.*/
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59 protected String value;
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60
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61 /** The name of the data used for the comparison.*/
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62 protected String dataname;
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63
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64
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65
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66 public ValueCompareTransition() {
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67 }
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68
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69
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70 public ValueCompareTransition(String from, String to) {
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71 super(from, to);
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72 }
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73
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74
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eb5564662e19 Cosmetics, documentation.
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75 /** Setup member values from the document. */
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76 @Override
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77 public void init(Node config) {
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78 log.debug("ValueCompareTransition.init");
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79
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80 String tmp = (String) XMLUtils.xpath(
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81 config,
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82 XPATH_OPERATOR,
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83 XPathConstants.STRING);
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84 operator = tmp.trim().toLowerCase();
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85
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86 value = (String) XMLUtils.xpath(
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87 config,
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88 XPATH_VALUE,
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89 XPathConstants.STRING);
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90
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91 dataname = (String) XMLUtils.xpath(
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92 config,
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93 XPATH_DATANAME,
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94 XPathConstants.STRING);
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95 }
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96
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97
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98 @Override
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99 public boolean isValid(Artifact artifact, State a, State b) {
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100 log.debug("ValueCompareTransition.isValid");
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101
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102 D4EArtifact flysArtifact = (D4EArtifact) artifact;
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103
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104 StateData dataObj = flysArtifact.getData(dataname);
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105 String dataVal = dataObj != null ? (String) dataObj.getValue() : "";
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106
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107 if (log.isDebugEnabled()) {
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108 log.debug("Compare settings:");
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109 log.debug("-- dataname: " + dataname);
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110 log.debug("-- operator: " + operator);
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111 log.debug("-- compare value: " + value);
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112 log.debug("-- state value: " + dataVal);
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113 }
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114
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115 if (operator.equals(OPERATOR_EQUAL)) {
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116 return value.equals(dataVal);
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117 }
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118 else if (operator.equals(OPERATOR_NOTEQUAL)) {
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119 return !(value.equals(dataVal));
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120 }
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121
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122 log.error("Wrong operator set! No comparison takes place.");
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123
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124 return false;
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125 }
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126 }
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127 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org