2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0.
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
19 package gov.nasa.jpf.util;
22 * encapsulates a listener-managed trace operation
24 public class TraceElement<T> {
28 TraceElement<T> prevElement;
29 TraceElement<T> prevTransition;
31 public TraceElement (T op){
35 public TraceElement<T> getPrevElement() {
44 public TraceElement<T> clone() {
45 TraceElement<T> e = new TraceElement<T>(op);
48 // we don't clone the linkage
50 e.prevTransition = null;