Mercurial > dive4elements > gnv-client
diff gnv-artifacts/src/main/java/de/intevation/gnv/transition/TransitionFactory.java @ 1119:7c4f81f74c47
merged gnv-artifacts
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Fri, 28 Sep 2012 12:14:00 +0200 |
parents | f953c9a559d8 |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gnv-artifacts/src/main/java/de/intevation/gnv/transition/TransitionFactory.java Fri Sep 28 12:14:00 2012 +0200 @@ -0,0 +1,75 @@ +/* + * Copyright (c) 2010 by Intevation GmbH + * + * This program is free software under the LGPL (>=v2.1) + * Read the file LGPL.txt coming with the software for details + * or visit http://www.gnu.org/licenses/ if it does not exist. + */ + +package de.intevation.gnv.transition; + +import org.apache.log4j.Logger; +import org.w3c.dom.Node; + +import de.intevation.gnv.artifacts.GNVArtifactBase; + +/** + * This Factoryclass instantiates Objects of Type Transition. + * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> + * + */ +public class TransitionFactory { + + /** + * the logger, used to log exceptions and additonaly information + */ + private static Logger log = Logger.getLogger(GNVArtifactBase.class); + + /** + * The Singleton instance of the Transitionfactory. + */ + private static TransitionFactory instance = null; + + /** + * Constructor + */ + public TransitionFactory() { + super(); + } + + /** + * Returns the Instance of this Class. + * @return the Instance of this Class. + */ + public static TransitionFactory getInstance() { + if (instance == null) { + instance = new TransitionFactory(); + } + return instance; + } + + /** + * Creates a new Transition using the Configuration that is provided by the + * XML-Node. + * @param configuration The configuration that should be used to initialize + * the new Transition + * @return a new Transition. + */ + public Transition createTransition(Node configuration) { + log.debug("TransitionFactory.createTransition"); + Transition state = null; + try { + String classname = ((org.w3c.dom.Element)configuration).getAttribute("transition"); + state = (Transition) (Class.forName(classname).newInstance()); + state.setup(configuration); + } catch (InstantiationException e) { + log.error(e, e); + } catch (IllegalAccessException e) { + log.error(e, e); + } catch (ClassNotFoundException e) { + log.error(e, e); + } + return state; + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :