/* Soot - a J*va Optimization Framework
 * Copyright (C) 2004 Navindra Umanee <navindra@cs.mcgill.ca>
 *
 * 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.
 */

package soot.shimple.internal;

import soot.*;
import soot.util.*;
import soot.shimple.*;
import soot.toolkits.scalar.*;
import java.util.*;

/**
 * @author Navindra Umanee
 **/
public class SPiExpr implements PiExpr
{
    protected ValueUnitPair argBox;
    protected Object targetKey;

    public SPiExpr(Value v, Unit u, Object o)
    {
        argBox = new SValueUnitPair(v, u);
        this.targetKey = o;
    }
    
    public ValueUnitPair getArgBox()
    {
        return argBox;
    }
        
    public Value getValue()
    {
        return argBox.getValue();
    }
    
    public Unit getCondStmt()
    {
        return argBox.getUnit();
    }

    public Object getTargetKey()
    {
        return targetKey;
    }
    
    public void setValue(Value value)
    {
        argBox.setValue(value);
    }
    
    public void setCondStmt(Unit pred)
    {
        argBox.setUnit(pred);
    }

    public void setTargetKey(Object targetKey)
    {
        this.targetKey = targetKey;
    }
    
    public List getUnitBoxes()
    {
        return Collections.singletonList(argBox);
    }

    public void clearUnitBoxes()
    {
        System.out.println("clear unit boxes");
        argBox.setUnit(null);
    }
    
    public boolean equivTo(Object o)
    {
        if(!(o instanceof SPiExpr))
            return false;

        return getArgBox().equivTo(((SPiExpr)o).getArgBox());
    }

    public int equivHashCode()
    {
        return getArgBox().equivHashCode() * 17;
    }
    
    public void apply(Switch sw)
    {
        // *** FIXME:
        throw new RuntimeException("Not Yet Implemented.");
    }

    public Object clone()
    {
        return new SPiExpr(getValue(), getCondStmt(), getTargetKey());
    }

    public String toString()
    {
        String s = Shimple.PI + "(" + getValue() + ")";
        return s;
    }
    
    public void toString(UnitPrinter up)
    {
        up.literal(Shimple.PI);
        up.literal("(");
        argBox.toString(up);
        up.literal(" [");
        up.literal(targetKey.toString());
        up.literal("])");
    }

    public Type getType()
    {
        return getValue().getType();
    }
    
    public List getUseBoxes()
    {
        return Collections.singletonList(argBox);
    }
}