/**
 *
 */
package com.c2kernel.utils;

import com.c2kernel.common.InvalidDataException;
import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.entity.proxy.ItemProxy;
import com.c2kernel.lifecycle.instance.stateMachine.StateMachine;
import com.c2kernel.persistency.ClusterStorage;
import com.c2kernel.persistency.ClusterStorageException;
import com.c2kernel.persistency.outcome.Viewpoint;
import com.c2kernel.process.Gateway;

public class StateMachineCache extends DescriptionObjectCache<StateMachine> {

	
	@Override
	public String getDefRoot() {
		return "/desc/StateMachine";
	}
	
	@Override
	public StateMachine loadObject(String name, int version, ItemProxy proxy) throws ObjectNotFoundException, InvalidDataException {
		StateMachine thisStateMachine;
        Viewpoint smView = (Viewpoint)proxy.getObject(ClusterStorage.VIEWPOINT + "/StateMachine/" + version);
        String marshalledSM;
		try {
			marshalledSM = smView.getOutcome().getData();
		} catch (ClusterStorageException ex) {
			Logger.error(ex);
			throw new ObjectNotFoundException("Problem loading State Machine "+name+" v"+version+": "+ex.getMessage(), "");
		}
		try {
			thisStateMachine = (StateMachine)Gateway.getMarshaller().unmarshall(marshalledSM);
		} catch (Exception ex) {
			Logger.error(ex);
			throw new InvalidDataException("Could not unmarshall State Machine '"+name+"' v"+version+": "+ex.getMessage(), "");
		}
		thisStateMachine.setName(name);
		thisStateMachine.setVersion(version);
        return thisStateMachine;
	}

}