view gnv-artifacts/src/main/java/de/intevation/gnv/state/StateFactory.java @ 612:e86d37008fd1

Added new Transition and State for using the PreSettingsValue for the decision if a Transition could be used and the usage of PreSettings as InputValues. gnv-artifacts/trunk@678 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Fri, 12 Feb 2010 09:11:49 +0000
parents e964a3d8f7bc
children 9a828e5a2390
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/**
 *
 */
package de.intevation.gnv.state;

import org.apache.log4j.Logger;
import org.w3c.dom.Node;

import de.intevation.gnv.artifacts.GNVArtifactBase;

/**
 * @author Tim Englich <tim.englich@intevation.de>
 * 
 */
public class StateFactory {

    /**
     * the logger, used to log exceptions and additonaly information
     */
    private static Logger log = Logger.getLogger(GNVArtifactBase.class);

    private static StateFactory instance = null;

    /**
     * Constructor
     */
    public StateFactory() {
        super();
    }

    public static StateFactory getInstance() {
        if (instance == null) {
            instance = new StateFactory();
        }
        return instance;
    }

    public State createState(Node configuration) {
        log.debug("StateFactory.createState");
        State state = null;
        try {
            String classname = ((org.w3c.dom.Element)configuration).getAttribute("state");
            state = (State) (Class.forName(classname).newInstance());
            state.setup(configuration);
        } catch (InstantiationException e) {
            log.error(e, e);
        } catch (IllegalAccessException e) {
            log.error(e, e);
        } catch (ClassNotFoundException e) {
            log.error(e, e);
        }
        return state;
    }

}

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