Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/state/StateFactory.java @ 875:5e9efdda6894
merged gnv-artifacts/1.0
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:13:56 +0200 |
| parents | 05bf8534a35a |
| children | f953c9a559d8 |
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| 722:bb3ffe7d719e | 875:5e9efdda6894 |
|---|---|
| 1 package de.intevation.gnv.state; | |
| 2 | |
| 3 import de.intevation.gnv.artifacts.GNVArtifactBase; | |
| 4 | |
| 5 import org.apache.log4j.Logger; | |
| 6 | |
| 7 import org.w3c.dom.Node; | |
| 8 | |
| 9 /** | |
| 10 * This factory should be used to create new state objects with help of a | |
| 11 * configuration segment. | |
| 12 * | |
| 13 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> | |
| 14 * | |
| 15 */ | |
| 16 public class StateFactory { | |
| 17 | |
| 18 /** | |
| 19 * the logger, used to log exceptions and additonaly information | |
| 20 */ | |
| 21 private static Logger log = Logger.getLogger(GNVArtifactBase.class); | |
| 22 | |
| 23 private static StateFactory instance = null; | |
| 24 | |
| 25 /** | |
| 26 * Constructor | |
| 27 */ | |
| 28 public StateFactory() { | |
| 29 super(); | |
| 30 } | |
| 31 | |
| 32 /** | |
| 33 * Return the instance of this class. | |
| 34 */ | |
| 35 public static StateFactory getInstance() { | |
| 36 if (instance == null) { | |
| 37 instance = new StateFactory(); | |
| 38 } | |
| 39 return instance; | |
| 40 } | |
| 41 | |
| 42 /** | |
| 43 * This method creates a new state with help of the information in <i> | |
| 44 * configuration</i> and calls its setup method after creation. | |
| 45 * | |
| 46 * @return the new state. | |
| 47 */ | |
| 48 public State createState(Node configuration) { | |
| 49 log.debug("StateFactory.createState"); | |
| 50 State state = null; | |
| 51 try { | |
| 52 String classname = ((org.w3c.dom.Element)configuration).getAttribute("state"); | |
| 53 state = (State) (Class.forName(classname).newInstance()); | |
| 54 state.setup(configuration); | |
| 55 } catch (InstantiationException e) { | |
| 56 log.error(e, e); | |
| 57 } catch (IllegalAccessException e) { | |
| 58 log.error(e, e); | |
| 59 } catch (ClassNotFoundException e) { | |
| 60 log.error(e, e); | |
| 61 } | |
| 62 return state; | |
| 63 } | |
| 64 } | |
| 65 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |