Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/transition/TransitionFactory.java @ 875:5e9efdda6894
merged gnv-artifacts/1.0
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:13:56 +0200 |
| parents | 05bf8534a35a |
| children | f953c9a559d8 |
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| 722:bb3ffe7d719e | 875:5e9efdda6894 |
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| 1 package de.intevation.gnv.transition; | |
| 2 | |
| 3 import org.apache.log4j.Logger; | |
| 4 import org.w3c.dom.Node; | |
| 5 | |
| 6 import de.intevation.gnv.artifacts.GNVArtifactBase; | |
| 7 | |
| 8 /** | |
| 9 * This Factoryclass instantiates Objects of Type Transition. | |
| 10 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> | |
| 11 * | |
| 12 */ | |
| 13 public class TransitionFactory { | |
| 14 | |
| 15 /** | |
| 16 * the logger, used to log exceptions and additonaly information | |
| 17 */ | |
| 18 private static Logger log = Logger.getLogger(GNVArtifactBase.class); | |
| 19 | |
| 20 /** | |
| 21 * The Singleton instance of the Transitionfactory. | |
| 22 */ | |
| 23 private static TransitionFactory instance = null; | |
| 24 | |
| 25 /** | |
| 26 * Constructor | |
| 27 */ | |
| 28 public TransitionFactory() { | |
| 29 super(); | |
| 30 } | |
| 31 | |
| 32 /** | |
| 33 * Returns the Instance of this Class. | |
| 34 * @return the Instance of this Class. | |
| 35 */ | |
| 36 public static TransitionFactory getInstance() { | |
| 37 if (instance == null) { | |
| 38 instance = new TransitionFactory(); | |
| 39 } | |
| 40 return instance; | |
| 41 } | |
| 42 | |
| 43 /** | |
| 44 * Creates a new Transition using the Configuration that is provided by the | |
| 45 * XML-Node. | |
| 46 * @param configuration The configuration that should be used to initialize | |
| 47 * the new Transition | |
| 48 * @return a new Transition. | |
| 49 */ | |
| 50 public Transition createTransition(Node configuration) { | |
| 51 log.debug("TransitionFactory.createTransition"); | |
| 52 Transition state = null; | |
| 53 try { | |
| 54 String classname = ((org.w3c.dom.Element)configuration).getAttribute("transition"); | |
| 55 state = (Transition) (Class.forName(classname).newInstance()); | |
| 56 state.setup(configuration); | |
| 57 } catch (InstantiationException e) { | |
| 58 log.error(e, e); | |
| 59 } catch (IllegalAccessException e) { | |
| 60 log.error(e, e); | |
| 61 } catch (ClassNotFoundException e) { | |
| 62 log.error(e, e); | |
| 63 } | |
| 64 return state; | |
| 65 } | |
| 66 } | |
| 67 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |