Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/transition/TransitionFactory.java @ 864:2b8707432121

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ISSUE262: Removed duplicate StateIds gnv-artifacts/trunk@1002 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 27 Apr 2010 13:10:24 +0000
parents 05bf8534a35a
children f953c9a559d8
rev   line source
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a887074460b6 Last Step of the Refactoring Work on the Transition Model.
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1 package de.intevation.gnv.transition;
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2
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3 import org.apache.log4j.Logger;
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4 import org.w3c.dom.Node;
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5
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6 import de.intevation.gnv.artifacts.GNVArtifactBase;
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7
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8 /**
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9 * This Factoryclass instantiates Objects of Type Transition.
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10 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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11 *
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12 */
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13 public class TransitionFactory {
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14
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15 /**
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16 * the logger, used to log exceptions and additonaly information
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17 */
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18 private static Logger log = Logger.getLogger(GNVArtifactBase.class);
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19
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20 /**
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21 * The Singleton instance of the Transitionfactory.
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22 */
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23 private static TransitionFactory instance = null;
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24
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25 /**
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26 * Constructor
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27 */
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28 public TransitionFactory() {
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29 super();
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30 }
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31
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32 /**
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33 * Returns the Instance of this Class.
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34 * @return the Instance of this Class.
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35 */
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36 public static TransitionFactory getInstance() {
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37 if (instance == null) {
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38 instance = new TransitionFactory();
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39 }
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40 return instance;
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41 }
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42
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43 /**
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44 * Creates a new Transition using the Configuration that is provided by the
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45 * XML-Node.
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46 * @param configuration The configuration that should be used to initialize
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47 * the new Transition
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48 * @return a new Transition.
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49 */
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50 public Transition createTransition(Node configuration) {
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51 log.debug("TransitionFactory.createTransition");
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52 Transition state = null;
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53 try {
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54 String classname = ((org.w3c.dom.Element)configuration).getAttribute("transition");
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55 state = (Transition) (Class.forName(classname).newInstance());
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56 state.setup(configuration);
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57 } catch (InstantiationException e) {
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58 log.error(e, e);
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59 } catch (IllegalAccessException e) {
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60 log.error(e, e);
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61 } catch (ClassNotFoundException e) {
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62 log.error(e, e);
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63 }
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64 return state;
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65 }
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66 }
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67 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org