Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/state/StateFactory.java @ 1119:7c4f81f74c47
merged gnv-artifacts
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:00 +0200 |
| parents | f953c9a559d8 |
| children |
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| 1027:fca4b5eb8d2f | 1119:7c4f81f74c47 |
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| 1 /* | |
| 2 * Copyright (c) 2010 by Intevation GmbH | |
| 3 * | |
| 4 * This program is free software under the LGPL (>=v2.1) | |
| 5 * Read the file LGPL.txt coming with the software for details | |
| 6 * or visit http://www.gnu.org/licenses/ if it does not exist. | |
| 7 */ | |
| 8 | |
| 9 package de.intevation.gnv.state; | |
| 10 | |
| 11 import de.intevation.gnv.artifacts.GNVArtifactBase; | |
| 12 | |
| 13 import org.apache.log4j.Logger; | |
| 14 | |
| 15 import org.w3c.dom.Node; | |
| 16 | |
| 17 /** | |
| 18 * This factory should be used to create new state objects with help of a | |
| 19 * configuration segment. | |
| 20 * | |
| 21 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> | |
| 22 * | |
| 23 */ | |
| 24 public class StateFactory { | |
| 25 | |
| 26 /** | |
| 27 * the logger, used to log exceptions and additonaly information | |
| 28 */ | |
| 29 private static Logger log = Logger.getLogger(GNVArtifactBase.class); | |
| 30 | |
| 31 private static StateFactory instance = null; | |
| 32 | |
| 33 /** | |
| 34 * Constructor | |
| 35 */ | |
| 36 public StateFactory() { | |
| 37 super(); | |
| 38 } | |
| 39 | |
| 40 /** | |
| 41 * Return the instance of this class. | |
| 42 */ | |
| 43 public static StateFactory getInstance() { | |
| 44 if (instance == null) { | |
| 45 instance = new StateFactory(); | |
| 46 } | |
| 47 return instance; | |
| 48 } | |
| 49 | |
| 50 /** | |
| 51 * This method creates a new state with help of the information in <i> | |
| 52 * configuration</i> and calls its setup method after creation. | |
| 53 * | |
| 54 * @return the new state. | |
| 55 */ | |
| 56 public State createState(Node configuration) { | |
| 57 log.debug("StateFactory.createState"); | |
| 58 State state = null; | |
| 59 try { | |
| 60 String classname = ((org.w3c.dom.Element)configuration).getAttribute("state"); | |
| 61 state = (State) (Class.forName(classname).newInstance()); | |
| 62 state.setup(configuration); | |
| 63 } catch (InstantiationException e) { | |
| 64 log.error(e, e); | |
| 65 } catch (IllegalAccessException e) { | |
| 66 log.error(e, e); | |
| 67 } catch (ClassNotFoundException e) { | |
| 68 log.error(e, e); | |
| 69 } | |
| 70 return state; | |
| 71 } | |
| 72 } | |
| 73 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |