Action.java

/**
 * This file Copyright (c) 2005-2008 Aptana, Inc. This program is
 * dual-licensed under both the Aptana Public License and the GNU General
 * Public license. You may elect to use one or the other of these licenses.
 * 
 * This program is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT. Redistribution, except as permitted by whichever of
 * the GPL or APL you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or modify this
 * program under the terms of the GNU General Public License,
 * Version 3, as published by the Free Software Foundation.  You should
 * have received a copy of the GNU General Public License, Version 3 along
 * with this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Aptana provides a special exception to allow redistribution of this file
 * with certain other free and open source software ("FOSS") code and certain additional terms
 * pursuant to Section 7 of the GPL. You may view the exception and these
 * terms on the web at http://www.aptana.com/legal/gpl/.
 * 
 * 2. For the Aptana Public License (APL), this program and the
 * accompanying materials are made available under the terms of the APL
 * v1.0 which accompanies this distribution, and is available at
 * http://www.aptana.com/legal/apl/.
 * 
 * You may view the GPL, Aptana's exception and additional terms, and the
 * APL in the file titled license.html at the root of the corresponding
 * plugin containing this source file.
 * 
 * Any modifications to this file must keep this entire header intact.
 */
package com.aptana.ide.parsing.bnf;

/**
 * @author Kevin Lindsey
 */
public class Action
{
	/**
	 * ERROR
	 */
	public static final int ERROR = 0;

	/**
	 * SHIFT
	 */
	public static final int SHIFT = 1;

	/**
	 * REDUCE
	 */
	public static final int REDUCE = 2;

	/**
	 * GOTO
	 */
	public static final int GOTO = 3;

	/**
	 * ACCEPT
	 */
	public static final int ACCEPT = 4;

	/**
	 * type
	 */
	public ActionType type;

	/**
	 * newState
	 */
	public int newState;

	/**
	 * Action
	 * 
	 * @param type
	 * @param newState
	 */
	public Action(ActionType type, int newState)
	{
		this.type = type;
		this.newState = newState;
	}

	/**
	 * @see java.lang.Object#toString()
	 */
	public String toString()
	{
		String result;

		switch (this.type)
		{
			case REDUCE:
				result = "r" + this.newState; //$NON-NLS-1$
				break;

			case SHIFT:
				result = "s" + this.newState; //$NON-NLS-1$
				break;

			case GOTO:
				result = Integer.toString(this.newState);
				break;

			case ERROR:
				result = "-"; //$NON-NLS-1$
				break;

			case ACCEPT:
				result = "acc"; //$NON-NLS-1$
				break;

			default:
				result = "???"; //$NON-NLS-1$
				break;
		}

		return result;
	}
}