Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/transition/TransitionFactory.java @ 1119:7c4f81f74c47
merged gnv-artifacts
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:00 +0200 |
| parents | f953c9a559d8 |
| children |
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| 1027:fca4b5eb8d2f | 1119:7c4f81f74c47 |
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| 1 /* | |
| 2 * Copyright (c) 2010 by Intevation GmbH | |
| 3 * | |
| 4 * This program is free software under the LGPL (>=v2.1) | |
| 5 * Read the file LGPL.txt coming with the software for details | |
| 6 * or visit http://www.gnu.org/licenses/ if it does not exist. | |
| 7 */ | |
| 8 | |
| 9 package de.intevation.gnv.transition; | |
| 10 | |
| 11 import org.apache.log4j.Logger; | |
| 12 import org.w3c.dom.Node; | |
| 13 | |
| 14 import de.intevation.gnv.artifacts.GNVArtifactBase; | |
| 15 | |
| 16 /** | |
| 17 * This Factoryclass instantiates Objects of Type Transition. | |
| 18 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> | |
| 19 * | |
| 20 */ | |
| 21 public class TransitionFactory { | |
| 22 | |
| 23 /** | |
| 24 * the logger, used to log exceptions and additonaly information | |
| 25 */ | |
| 26 private static Logger log = Logger.getLogger(GNVArtifactBase.class); | |
| 27 | |
| 28 /** | |
| 29 * The Singleton instance of the Transitionfactory. | |
| 30 */ | |
| 31 private static TransitionFactory instance = null; | |
| 32 | |
| 33 /** | |
| 34 * Constructor | |
| 35 */ | |
| 36 public TransitionFactory() { | |
| 37 super(); | |
| 38 } | |
| 39 | |
| 40 /** | |
| 41 * Returns the Instance of this Class. | |
| 42 * @return the Instance of this Class. | |
| 43 */ | |
| 44 public static TransitionFactory getInstance() { | |
| 45 if (instance == null) { | |
| 46 instance = new TransitionFactory(); | |
| 47 } | |
| 48 return instance; | |
| 49 } | |
| 50 | |
| 51 /** | |
| 52 * Creates a new Transition using the Configuration that is provided by the | |
| 53 * XML-Node. | |
| 54 * @param configuration The configuration that should be used to initialize | |
| 55 * the new Transition | |
| 56 * @return a new Transition. | |
| 57 */ | |
| 58 public Transition createTransition(Node configuration) { | |
| 59 log.debug("TransitionFactory.createTransition"); | |
| 60 Transition state = null; | |
| 61 try { | |
| 62 String classname = ((org.w3c.dom.Element)configuration).getAttribute("transition"); | |
| 63 state = (Transition) (Class.forName(classname).newInstance()); | |
| 64 state.setup(configuration); | |
| 65 } catch (InstantiationException e) { | |
| 66 log.error(e, e); | |
| 67 } catch (IllegalAccessException e) { | |
| 68 log.error(e, e); | |
| 69 } catch (ClassNotFoundException e) { | |
| 70 log.error(e, e); | |
| 71 } | |
| 72 return state; | |
| 73 } | |
| 74 } | |
| 75 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |