ingo@108: package de.intevation.flys.artifacts.states;
ingo@108: 
ingo@108: import javax.xml.xpath.XPathConstants;
ingo@108: 
ingo@108: import org.apache.log4j.Logger;
ingo@108: 
ingo@108: import org.w3c.dom.Node;
ingo@108: 
ingo@108: import de.intevation.artifactdatabase.state.State;
ingo@108: 
ingo@108: import de.intevation.artifacts.common.utils.XMLUtils;
ingo@108: 
ingo@108: 
ingo@108: /**
ingo@108:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@108:  */
ingo@108: public class StateFactory {
ingo@108: 
ingo@108:     /** The logger used in this class */
ingo@108:     private static Logger logger = Logger.getLogger(StateFactory.class);
ingo@108: 
ingo@108:     /** The XPath to the classname of the state */
ingo@108:     public static final String XPATH_STATE = "@state";
ingo@108: 
ingo@108: 
ingo@108:     /**
ingo@108:      * Creates a new State based on the configured class provided by
ingo@108:      * <code>stateConf</code>.
ingo@108:      *
ingo@108:      * @param stateConf The configuration of the state.
ingo@108:      *
ingo@108:      * @return a State.
ingo@108:      */
ingo@108:     public static State createState(Node stateConf) {
ingo@108:         String clazz = (String) XMLUtils.xpath(
ingo@108:             stateConf, XPATH_STATE, XPathConstants.STRING);
ingo@108: 
ingo@108:         State state = null;
ingo@108: 
ingo@108:         try {
ingo@108:             logger.debug("Create a new State for class: " + clazz);
ingo@108:             state = (State) Class.forName(clazz).newInstance();
ingo@108:             state.setup(stateConf);
ingo@108:         }
ingo@108:         catch (InstantiationException ie) {
ingo@108:             logger.error(ie, ie);
ingo@108:         }
ingo@108:         catch (IllegalAccessException iae) {
ingo@108:             logger.error(iae, iae);
ingo@108:         }
ingo@108:         catch (ClassNotFoundException cnfe) {
ingo@108:             logger.error(cnfe, cnfe);
ingo@108:         }
ingo@108: 
ingo@108:         return state;
ingo@108:     }
ingo@108: }
ingo@108: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :