soot.toolkits.scalar.Pair Maven / Gradle / Ivy
/* Soot - a J*va Optimization Framework
* Copyright (C) 2002 Ondrej Lhotak
* Copyright (C) 2007 Manu Sridharan
*
* 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.toolkits.scalar;
import soot.PointsToAnalysis;
import soot.SootMethod;
/** Just a pair of arbitrary objects.
*
* @author Ondrej Lhotak
* @author Manu Sridharan (genericized it)
* @author xiao, extend it with more functions
*/
public class Pair
{
public Pair() { o1 = null; o2 = null; }
public Pair( T o1, U o2 ) { this.o1 = o1; this.o2 = o2; }
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((o1 == null) ? 0 : o1.hashCode());
result = prime * result + ((o2 == null) ? 0 : o2.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
@SuppressWarnings("rawtypes")
Pair other = (Pair) obj;
if (o1 == null) {
if (other.o1 != null)
return false;
} else if (!o1.equals(other.o1))
return false;
if (o2 == null) {
if (other.o2 != null)
return false;
} else if (!o2.equals(other.o2))
return false;
return true;
}
/**
* Decide if this pair represents a method parameter.
*/
public boolean isParameter()
{
if ( o1 instanceof SootMethod && o2 instanceof Integer ) return true;
return false;
}
/**
* Decide if this pair stores the THIS parameter for a method.
*/
public boolean isThisParameter()
{
return (o1 instanceof SootMethod &&
o2.equals(PointsToAnalysis.THIS_NODE)) ? true : false;
}
public String toString() {
return "Pair "+o1+","+o2;
}
public T getO1() { return o1; }
public U getO2() { return o2; }
public void setO1( T no1 ) { o1 = no1; }
public void setO2( U no2 ) { o2 = no2; }
public void setPair( T no1, U no2 ) { o1 = no1; o2 = no2; }
protected T o1;
protected U o2;
}