ZeroOrMoreMatcher.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.matcher;

import com.aptana.ide.lexer.Lexeme;

/**
 * @author Kevin Lindsey
 */
public class ZeroOrMoreMatcher extends AbstractLexemeMatcher
{
	/**
	 * ZeroOrMoreMatcher
	 */
	public ZeroOrMoreMatcher()
	{
	}

	/**
	 * @see com.aptana.ide.parsing.matcher.AbstractLexemeMatcher#addChildTypes()
	 */
	public void addChildTypes()
	{
		this.addChildType(ILexemeMatcher.class);
		this.addChildType(UseRuleMatcher.class);
	}

	/**
	 * @see com.aptana.ide.parsing.matcher.ILexemeMatcher#match(com.aptana.ide.lexer.Lexeme[], int, int)
	 */
	public int match(Lexeme[] lexemes, int offset, int eofOffset)
	{
		int result = offset;
		ILexemeMatcher child = null;
		
		this.reset();
		
		if (this.getChildCount() > 0)
		{
			child = (ILexemeMatcher) this.getChild(0);
		}
		
		if (child != null)
		{
			while (result < eofOffset)
			{
				int temp = child.match(lexemes, result, eofOffset);
				
				if (temp == -1)
				{
					break;
				}
				else
				{
					result = temp;
					this.addChildParseNode(child.getParseResults());
				}
			}
		}
		
		if (result != -1)
		{
			this.accept(lexemes, offset, result);
		}
		
		return result;
	}
}