Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/state/StateFactory.java @ 949:11d8cc2deb92 1.0

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