Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/transition/TransitionFactory.java @ 1063:732cea65cee7
Changed the geo-backend initialization regarding the changes of rev1149. An sql-cache is integrated and enabled now.
gnv-artifacts/trunk@1150 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 03 Jun 2010 16:10:27 +0000 |
parents | 05bf8534a35a |
children | f953c9a559d8 |
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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 : |