Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/transitions/ValueCompareTransition.java @ 356:22e9574c8b1b
Added a new Transition to compare values.
flys-artifacts/trunk@1763 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Thu, 28 Apr 2011 11:22:45 +0000 |
| parents | |
| children | eb5564662e19 |
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| 355:d97982627596 | 356:22e9574c8b1b |
|---|---|
| 1 package de.intevation.flys.artifacts.transitions; | |
| 2 | |
| 3 import javax.xml.xpath.XPathConstants; | |
| 4 | |
| 5 import org.apache.log4j.Logger; | |
| 6 | |
| 7 import org.w3c.dom.Node; | |
| 8 | |
| 9 import de.intevation.artifacts.Artifact; | |
| 10 | |
| 11 import de.intevation.artifactdatabase.data.StateData; | |
| 12 import de.intevation.artifactdatabase.state.State; | |
| 13 | |
| 14 import de.intevation.artifacts.common.utils.XMLUtils; | |
| 15 | |
| 16 import de.intevation.flys.artifacts.FLYSArtifact; | |
| 17 | |
| 18 | |
| 19 /** | |
| 20 * This transition compares data objects with a <i>equal</i> or <i>notequal</i> | |
| 21 * operator. | |
| 22 * | |
| 23 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 24 */ | |
| 25 public class ValueCompareTransition extends DefaultTransition { | |
| 26 | |
| 27 /** The logger that is used in this transition.*/ | |
| 28 private static Logger log = Logger.getLogger(ValueCompareTransition.class); | |
| 29 | |
| 30 | |
| 31 /** XPath that points to the condition's operator.*/ | |
| 32 public static final String XPATH_OPERATOR = "condition/@operator"; | |
| 33 | |
| 34 /** XPath that points to the condition's value.*/ | |
| 35 public static final String XPATH_VALUE = "condition/@value"; | |
| 36 | |
| 37 /** XPath that points to the condition's dataname.*/ | |
| 38 public static final String XPATH_DATANAME = "condition/@data"; | |
| 39 | |
| 40 /** The value of the 'equal' operator.*/ | |
| 41 public static final String OPERATOR_EQUAL = "equal"; | |
| 42 | |
| 43 /** The value of the 'not equal' operator.*/ | |
| 44 public static final String OPERATOR_NOTEQUAL = "notequal"; | |
| 45 | |
| 46 | |
| 47 /** The operator.*/ | |
| 48 protected String operator; | |
| 49 | |
| 50 /** The value used for comparison.*/ | |
| 51 protected String value; | |
| 52 | |
| 53 /** The name of the data used for the comparison.*/ | |
| 54 protected String dataname; | |
| 55 | |
| 56 | |
| 57 | |
| 58 public ValueCompareTransition() { | |
| 59 } | |
| 60 | |
| 61 | |
| 62 public ValueCompareTransition(String from, String to) { | |
| 63 super(from, to); | |
| 64 } | |
| 65 | |
| 66 | |
| 67 @Override | |
| 68 public void init(Node config) { | |
| 69 log.debug("ValueCompareTransition.init"); | |
| 70 | |
| 71 String tmp = (String) XMLUtils.xpath( | |
| 72 config, | |
| 73 XPATH_OPERATOR, | |
| 74 XPathConstants.STRING); | |
| 75 operator = tmp.trim().toLowerCase(); | |
| 76 | |
| 77 value = (String) XMLUtils.xpath( | |
| 78 config, | |
| 79 XPATH_VALUE, | |
| 80 XPathConstants.STRING); | |
| 81 | |
| 82 dataname = (String) XMLUtils.xpath( | |
| 83 config, | |
| 84 XPATH_DATANAME, | |
| 85 XPathConstants.STRING); | |
| 86 } | |
| 87 | |
| 88 | |
| 89 @Override | |
| 90 public boolean isValid(Artifact artifact, State a, State b) { | |
| 91 log.debug("ValueCompareTransition.isValid"); | |
| 92 | |
| 93 FLYSArtifact flysArtifact = (FLYSArtifact) artifact; | |
| 94 | |
| 95 StateData dataObj = flysArtifact.getData(dataname); | |
| 96 String dataVal = dataObj != null ? (String) dataObj.getValue() : ""; | |
| 97 | |
| 98 if (log.isDebugEnabled()) { | |
| 99 log.debug("Compare settings:"); | |
| 100 log.debug("-- dataname: " + dataname); | |
| 101 log.debug("-- operator: " + operator); | |
| 102 log.debug("-- compare value: " + value); | |
| 103 log.debug("-- state value: " + dataVal); | |
| 104 } | |
| 105 | |
| 106 if (operator.equals(OPERATOR_EQUAL)) { | |
| 107 return value.equals(dataVal); | |
| 108 } | |
| 109 else if (operator.equals(OPERATOR_NOTEQUAL)) { | |
| 110 return !(value.equals(dataVal)); | |
| 111 } | |
| 112 | |
| 113 log.error("Wrong operator set! No comparison takes place."); | |
| 114 | |
| 115 return false; | |
| 116 } | |
| 117 } | |
| 118 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |