/* Soot - a J*va Optimization Framework
 * Copyright (C) 2000 Feng Qian
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * Modified by the Sable Research Group and others 1997-1999.  
 * See the 'credits' file distributed with Soot for the complete list of
 * contributors.  (Soot is distributed at http://www.sable.mcgill.ca/soot)
 */

package soot.jimple.toolkits.annotation.arraycheck;

class IntValueContainer
{
    private static final int BOT = 0;
    private static final int TOP = 1;
    private static final int INT = 2;

    private int type;
    private int value;

    public IntValueContainer()
    {
	this.type = BOT;
    }

    public IntValueContainer(int v)
    {
	this.type = INT;
	this.value = v;
    }

    public boolean isBottom()
    {
	return (this.type == BOT);
    }

    public boolean isTop()
    {
	return (this.type == TOP);
    }

    public boolean isInteger()
    {
	return this.type == INT;
    }

    public int getValue()
    {
	if (this.type != INT)
	    throw new RuntimeException("IntValueContainer: not integer type");

	return this.value;
    }

    public void setTop()
    {
	this.type = TOP;
    }

    public void setValue(int v)
    {
	this.type = INT;
	this.value = v;
    }

    public void setBottom()
    {
	this.type = BOT;
    }

    public String toString()
    {
	if (type == BOT)
	    return "[B]";
	else
        if (type == TOP)
	    return "[T]";
	else
	    return "["+value+"]";
    }

    public boolean equals(Object other)
    {
	if (!(other instanceof IntValueContainer))
	    return false;

	IntValueContainer otherv = (IntValueContainer)other;

	if ((this.type == INT) && (otherv.type == INT))
	    return (this.value == otherv.value);
	else
	    return (this.type == otherv.type) ;
    }

    public IntValueContainer dup()
    {
	IntValueContainer other = new IntValueContainer();
	other.type = this.type;
	other.value = this.value;
	
	return other;	
    }
}