//
// Copyright (C) 2007 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.util;
/**
* encapsulates a listener-managed trace operation
*/
public class TraceElement<T> {
T op;
int stateId;
TraceElement<T> prevElement;
TraceElement<T> prevTransition;
public TraceElement (T op){
this.op = op;
}
public TraceElement<T> getPrevElement() {
return prevElement;
}
public T getOp() {
return op;
}
public TraceElement<T> clone() {
TraceElement<T> e = new TraceElement<T>(op);
e.stateId = stateId;
// we don't clone the linkage
e.prevElement = null;
e.prevTransition = null;
return e;
}
}