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.
18 package gov.nasa.jpf.vm;
22 * helper class to store object references in a context where Integer is used for boxed 'int' values
25 public static final ObjRef NULL = new ObjRef(MJIEnv.NULL);
29 protected ObjRef (int ref) {
33 public boolean isNull () {
34 return reference == MJIEnv.NULL;
37 public int getReference () {
42 public boolean equals (Object o) {
43 if (o.getClass() == ObjRef.class) {
44 ObjRef other = (ObjRef)o;
45 return reference == other.reference;
51 public int hashCode () {
56 public String toString () {
57 return "ObjRef(" + reference + ')';