OperandPerturbator.java

//
// Copyright (C) 2010 United States Government as represented by the
// Administrator of the National Aeronautics and Space Administration
// (NASA).  All Rights Reserved.
//
// This software is distributed under the NASA Open Source Agreement
// (NOSA), version 1.3.  The NOSA has been approved by the Open Source
// Initiative.  See the file NOSA-1.3-JPF at the top of the distribution
// directory tree for the complete NOSA document.
//
// THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY
// KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT
// LIMITED TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO
// SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
// A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT
// THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT
// DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE SUBJECT SOFTWARE.
//

package gov.nasa.jpf.perturb;

import gov.nasa.jpf.vm.ChoiceGenerator;
import gov.nasa.jpf.vm.StackFrame;


/**
 * basic type for policy objects that perturb operand stacks by means
 * of choice generators
 */
public interface OperandPerturbator {

  Class<? extends ChoiceGenerator<?>> getChoiceGeneratorType();

  ChoiceGenerator<?> createChoiceGenerator (String id, StackFrame frame, Object refObject);
    
  boolean perturb (ChoiceGenerator<?> cg, StackFrame frame);
}