Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/transition/TransitionFactory.java @ 1129:ccfa07b88476

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merged geo-backend
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:01 +0200
parents f953c9a559d8
children
rev   line source
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.transition;
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10
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11 import org.apache.log4j.Logger;
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12 import org.w3c.dom.Node;
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13
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14 import de.intevation.gnv.artifacts.GNVArtifactBase;
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16 /**
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17 * This Factoryclass instantiates Objects of Type Transition.
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18 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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19 *
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20 */
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21 public class TransitionFactory {
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22
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23 /**
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24 * the logger, used to log exceptions and additonaly information
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25 */
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26 private static Logger log = Logger.getLogger(GNVArtifactBase.class);
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27
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28 /**
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29 * The Singleton instance of the Transitionfactory.
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30 */
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31 private static TransitionFactory instance = null;
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32
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33 /**
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34 * Constructor
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35 */
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36 public TransitionFactory() {
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37 super();
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38 }
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39
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40 /**
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41 * Returns the Instance of this Class.
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42 * @return the Instance of this Class.
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43 */
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44 public static TransitionFactory getInstance() {
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45 if (instance == null) {
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46 instance = new TransitionFactory();
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47 }
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48 return instance;
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49 }
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50
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51 /**
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52 * Creates a new Transition using the Configuration that is provided by the
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53 * XML-Node.
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54 * @param configuration The configuration that should be used to initialize
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55 * the new Transition
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56 * @return a new Transition.
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57 */
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58 public Transition createTransition(Node configuration) {
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59 log.debug("TransitionFactory.createTransition");
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60 Transition state = null;
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61 try {
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62 String classname = ((org.w3c.dom.Element)configuration).getAttribute("transition");
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63 state = (Transition) (Class.forName(classname).newInstance());
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64 state.setup(configuration);
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65 } catch (InstantiationException e) {
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66 log.error(e, e);
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67 } catch (IllegalAccessException e) {
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68 log.error(e, e);
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69 } catch (ClassNotFoundException e) {
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70 log.error(e, e);
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71 }
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72 return state;
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73 }
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74 }
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75 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org