/*
 * (c) Copyright 2010-2011 AgileBirds
 *
 * This file is part of OpenFlexo.
 *
 * OpenFlexo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * OpenFlexo is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenFlexo. If not, see <http://www.gnu.org/licenses/>.
 *
 */
package cb.parser;

import java.util.Stack;

public class Token {
	public static final Token LPAREN = new Token(Lexer.LPAREN, "(", -1);
	public static final Token RPAREN = new Token(Lexer.RPAREN, ")", -1);
	public static final Token COMMA = new Token(Lexer.COMMA, ",", -1);
	public static final Token TRUE = new Token(Lexer.BOOLEAN, "TRUE", -1);
	public static final Token FALSE = new Token(Lexer.BOOLEAN, "FALSE", -1);
	public static final Token EOF = new Token(Lexer.EOF, "<EOF>", -1);

	private Token() {
	}

	private Token(int kind, String image, int line) {
		init(kind, image, line);
	}

	private void init(int kind, String image, int line) {
		this.kind = kind;
		this.image = image;
		this.line = line;
	}

	private static Stack stack = new Stack();

	public static Token createToken(int kind, String image, int line) {
		Token t;

		if (stack.isEmpty()) {
			t = new Token();
		} else {
			t = (Token) stack.pop();
		}

		t.init(kind, image, line);
		return t;
	}

	public static void dispose(Token t) {
		if (t != null) {
			stack.push(t);
		}
	}

	public int kind;
	public String image;
	public int line;
}