Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/transitions/ValueCompareTransition.java @ 9801:1d7a72a50183 3.2.x tip

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Assume Compose V2, consistently
author Tom Gottfried <tom@intevation.de>
date Thu, 23 Nov 2023 10:14:13 +0100
parents 0a5239a1e46e
children
rev   line source
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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.logging.log4j.Logger;
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14 import org.apache.logging.log4j.LogManager;
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15
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16 import org.w3c.dom.Node;
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17
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18 import org.dive4elements.artifacts.Artifact;
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19
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20 import org.dive4elements.artifactdatabase.data.StateData;
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21 import org.dive4elements.artifactdatabase.state.State;
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22
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23 import org.dive4elements.artifacts.common.utils.XMLUtils;
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24
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25 import org.dive4elements.river.artifacts.D4EArtifact;
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26
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27
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28 /**
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29 * This transition compares data objects with a <i>equal</i> or <i>notequal</i>
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30 * operator.
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31 *
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32 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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33 */
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34 public class ValueCompareTransition extends DefaultTransition {
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35
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36 /** The log that is used in this transition.*/
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37 private static Logger log = LogManager.getLogger(ValueCompareTransition.class);
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38
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39
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40 /** XPath that points to the condition's operator.*/
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41 public static final String XPATH_OPERATOR = "condition/@operator";
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42
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43 /** XPath that points to the condition's value.*/
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44 public static final String XPATH_VALUE = "condition/@value";
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45
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46 /** XPath that points to the condition's dataname.*/
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47 public static final String XPATH_DATANAME = "condition/@data";
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48
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49 /** The value of the 'equal' operator.*/
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50 public static final String OPERATOR_EQUAL = "equal";
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51
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52 /** The value of the 'not equal' operator.*/
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53 public static final String OPERATOR_NOTEQUAL = "notequal";
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54
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55
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56 /** The operator.*/
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57 protected String operator;
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58
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59 /** The value used for comparison.*/
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60 protected String value;
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61
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62 /** The name of the data used for the comparison.*/
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63 protected String dataname;
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64
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65
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66
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67 public ValueCompareTransition() {
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68 }
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69
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70
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71 public ValueCompareTransition(String from, String to) {
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72 super(from, to);
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73 }
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74
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75
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76 /** Setup member values from the document. */
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77 @Override
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78 public void init(Node config) {
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79 log.debug("ValueCompareTransition.init");
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80
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81 String tmp = (String) XMLUtils.xpath(
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82 config,
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83 XPATH_OPERATOR,
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84 XPathConstants.STRING);
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85 operator = tmp.trim().toLowerCase();
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86
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87 value = (String) XMLUtils.xpath(
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88 config,
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89 XPATH_VALUE,
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90 XPathConstants.STRING);
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91
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92 dataname = (String) XMLUtils.xpath(
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93 config,
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94 XPATH_DATANAME,
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95 XPathConstants.STRING);
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96 }
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97
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98
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99 @Override
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100 public boolean isValid(Artifact artifact, State a, State b) {
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101 log.debug("ValueCompareTransition.isValid");
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102
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103 D4EArtifact flysArtifact = (D4EArtifact) artifact;
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104
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105 StateData dataObj = flysArtifact.getData(dataname);
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106 String dataVal = dataObj != null ? (String) dataObj.getValue() : "";
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107
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108 if (log.isDebugEnabled()) {
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109 log.debug("Compare settings:");
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110 log.debug("-- dataname: " + dataname);
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111 log.debug("-- operator: " + operator);
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112 log.debug("-- compare value: " + value);
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113 log.debug("-- state value: " + dataVal);
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114 }
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115
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116 if (operator.equals(OPERATOR_EQUAL)) {
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117 return value.equals(dataVal);
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118 }
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119 else if (operator.equals(OPERATOR_NOTEQUAL)) {
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120 return !(value.equals(dataVal));
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121 }
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122
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123 log.error("Wrong operator set! No comparison takes place.");
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124
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125 return false;
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126 }
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127 }
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128 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org