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/*******************************************************************************
 * Copyright (c) 2009 itemis AG (http://www.itemis.eu) and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 *******************************************************************************/
package org.eclipse.xtext.grammaranalysis;

import org.eclipse.xtext.AbstractElement;

/**
 * @author Moritz Eysholdt - Initial contribution and API
 */
public interface IGrammarNFAProvider {

	interface NFABuilder {

		boolean filter(AbstractElement ele);

		NFADirection getDirection();

		S getState(AbstractElement ele);

		T getTransition(S source, S target, boolean isRuleCall, AbstractElement loopCenter);
	}

	enum NFADirection {
		BACKWARD, FORWARD
	}

	S getNFA(AbstractElement element);
}