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 *
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 *
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 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
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 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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package org.hsqldb.cmdline.sqltool;

import java.util.ArrayList;

/* @(#)$Id: TokenList.java 4141 2011-03-14 01:35:49Z fredt $ */

/**
 * A list of SqlFile Tokens
 */
public class TokenList extends ArrayList<Token> implements TokenSource {
    static final long serialVersionUID = 5441418591320947274L;

    public TokenList() {
        super();
    }
    public TokenList(TokenList inList) {
        super(inList);
    }
    public Token yylex() {
        if (size() < 1) return null;
        //return remove(0);
        // Java5
        return remove(0);
    }

    public TokenList dup() {
        return new TokenList(this);
    }
}
