package org.simantics.document.server.state;

import org.simantics.db.ReadGraph;
import org.simantics.db.exception.DatabaseException;
import org.simantics.simulator.toolkit.StandardRealm;
import org.simantics.simulator.toolkit.db.StandardVariableSessionManager;

public class StateSessionManager extends StandardVariableSessionManager<StateNode, StateNodeManagerSupport> {

	private static StateSessionManager INSTANCE;

	public static StateSessionManager getInstance() {
		if(INSTANCE == null) {
			INSTANCE = new StateSessionManager();
		}
		return INSTANCE;
	}

	@Override
	protected StateNodeManagerSupport createEngine(ReadGraph graph, String id) throws DatabaseException {
		return new StateNodeManagerSupport();
	}

	@Override
	protected StandardRealm<StateNode, StateNodeManagerSupport> createRealm(StateNodeManagerSupport engine, String id) {
		return new StateRealm(engine, id);
	}

}