Pop2Stack.java :  » Plugin » sqlitegen » com » antlersoft » classwriter » Android Open Source

/**
 * Title:        <p>
 * Description:  Java object database; also code analysis tool<p>
 * <p>Copyright (c) 2000-2005  Michael A. MacDonald<p>
 * ----- - - -- - - --
 * <p>
 *     This package 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 2 of the License, or
 *     (at your option) any later version.
 * <p>
 *     This package 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.
 * <p>
 *     You should have received a copy of the GNU General Public License
 *     along with the package (see gpl.txt); if not, see www.gnu.org
 * <p>
 * ----- - - -- - - --
 * Company:      <p>
 * @author Michael MacDonald
 * @version 1.0
 */
package com.antlersoft.classwriter;

import java.util.EmptyStackException;
import java.util.Stack;

public class Pop2Stack implements ProcessStack
{

    public Pop2Stack()
    {
    }

    public Stack stackUpdate(Stack old_stack) throws CodeCheckException
    {
    try
      {
          Stack new_stack=(Stack)old_stack.clone();
          if ( new_stack.pop()==ProcessStack.CAT1)
           {
                if ( new_stack.pop()!=ProcessStack.CAT1)
                {
                    throw new CodeCheckException( "pop2: second object not CAT1");
                }
          }
           return new_stack;
        }
        catch ( EmptyStackException ese)
        {
            throw new CodeCheckException( "pop2: stack not deep enough");
        }
    }
}