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/*
 * Copyright (c) 2002-2007, CWI and INRIA
 *
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the _name of the University of California, Berkeley nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package openllet.aterm.pure;

import openllet.aterm.AFun;
import openllet.aterm.ATerm;
import openllet.aterm.Visitor;
import openllet.aterm.pure.owl.AFunOwl;
import openllet.shared.hash.HashFunctions;
import openllet.shared.hash.SharedObject;

public class AFunImpl extends AFunOwl
{
	private final String _name;

	private final int _arity;

	private final boolean _isQuoted;

	protected AFunImpl(final PureFactory factory, final String name, final int arity, final boolean isQuoted)
	{
		super(factory, true);

		_name = name.intern();
		_arity = arity;
		_isQuoted = isQuoted;

		setHashCode(HashFunctions.hashTerm(_name, _isQuoted, _arity));
	}

	@Override
	public SharedObject duplicate()
	{
		return this;
	}

	@Override
	public boolean equivalent(final SharedObject obj)
	{
		if (obj instanceof AFun)
		{
			final AFun peer = (AFun) obj;
			return peer.getName().equals(_name) && peer.getArity() == _arity && peer.isQuoted() == _isQuoted;
		}
		return false;
	}

	@Override
	public int getType()
	{
		return ATerm.AFUN;
	}

	@Override
	public String getName()
	{
		return _name;
	}

	@Override
	public int getArity()
	{
		return _arity;
	}

	@Override
	public boolean isQuoted()
	{
		return _isQuoted;
	}

	@Override
	public ATerm accept(final Visitor v)
	{
		return v.visitAFun(this);
	}
}