soot.jimple.ParameterRef Maven / Gradle / Ivy
/* Soot - a J*va Optimization Framework
* Copyright (C) 1997-1999 Raja Vallee-Rai
*
* 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;
import soot.*;
import soot.util.*;
import java.util.*;
/** ParameterRef objects are used by Body
* objects to refer to the parameter slots on method entry.
*
* For instance, in an instance method, the first statement will
* often be this := @parameter0; */
public class ParameterRef implements IdentityRef
{
int n;
Type paramType;
/** Constructs a ParameterRef object of the specified type, representing the specified parameter number. */
public ParameterRef(Type paramType, int number)
{
this.n = number;
this.paramType = paramType;
}
public boolean equivTo(Object o)
{
if (o instanceof ParameterRef)
{
return n == ((ParameterRef)o).n &&
paramType.equals(((ParameterRef)o).paramType);
}
return false;
}
public int equivHashCode()
{
return n * 101 + paramType.hashCode() * 17;
}
/** Create a new ParameterRef object with the same paramType and number. */
public Object clone()
{
return new ParameterRef(paramType, n);
}
/** Converts the given ParameterRef into a String i.e. @parameter0: .int. */
public String toString()
{
return "@parameter" + n + ": " + paramType;
}
public void toString( UnitPrinter up )
{
up.identityRef(this);
}
/** Returns the index of this ParameterRef. */
public int getIndex()
{
return n;
}
/** Sets the index of this ParameterRef. */
public void setIndex(int index)
{
n = index;
}
public List getUseBoxes()
{
return AbstractUnit.emptyList;
}
/** Returns the type of this ParameterRef. */
public Type getType()
{
return paramType;
}
/** Used with RefSwitch. */
public void apply(Switch sw)
{
((RefSwitch) sw).caseParameterRef(this);
}
}