Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/state/StateFactory.java @ 1115:f953c9a559d8
Added license file and license headers.
gnv-artifacts/trunk@1260 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Tue, 02 Nov 2010 17:46:55 +0000 |
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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.state; |
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10 |
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11 import de.intevation.gnv.artifacts.GNVArtifactBase; |
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12 |
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13 import org.apache.log4j.Logger; |
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14 |
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15 import org.w3c.dom.Node; |
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16 |
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17 /** |
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18 * This factory should be used to create new state objects with help of a |
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19 * configuration segment. |
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20 * |
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21 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> |
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22 * |
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23 */ |
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24 public class StateFactory { |
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25 |
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26 /** |
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27 * the logger, used to log exceptions and additonaly information |
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28 */ |
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29 private static Logger log = Logger.getLogger(GNVArtifactBase.class); |
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30 |
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31 private static StateFactory 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 StateFactory() { |
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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 * Return the instance of this class. |
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42 */ |
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43 public static StateFactory getInstance() { |
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44 if (instance == null) { |
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45 instance = new StateFactory(); |
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46 } |
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47 return instance; |
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48 } |
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49 |
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50 /** |
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51 * This method creates a new state with help of the information in <i> |
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52 * configuration</i> and calls its setup method after creation. |
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53 * |
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54 * @return the new state. |
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55 */ |
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56 public State createState(Node configuration) { |
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57 log.debug("StateFactory.createState"); |
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58 State state = null; |
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59 try { |
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60 String classname = ((org.w3c.dom.Element)configuration).getAttribute("state"); |
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61 state = (State) (Class.forName(classname).newInstance()); |
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62 state.setup(configuration); |
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63 } catch (InstantiationException e) { |
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64 log.error(e, e); |
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65 } catch (IllegalAccessException e) { |
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66 log.error(e, e); |
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67 } catch (ClassNotFoundException e) { |
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68 log.error(e, e); |
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69 } |
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70 return state; |
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71 } |
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72 } |
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73 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |