Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/transitions/ValueCompareTransition.java @ 5994:af13ceeba52a
Removed trailing whitespace.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Sun, 12 May 2013 18:13:50 +0200 |
parents | 59ff03ff48f1 |
children | e4606eae8ea5 |
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.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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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 : |