1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.bcel.verifier.structurals;
18
19 import org.apache.bcel.Const;
20 import org.apache.bcel.Constants;
21 import org.apache.bcel.generic.ObjectType;
22 import org.apache.bcel.generic.ReferenceType;
23
24 /**
25 * This class represents an uninitialized object type; see The Java Virtual Machine Specification, Second Edition, page
26 * 147: 4.9.4 for more details.
27 */
28 public class UninitializedObjectType extends ReferenceType implements Constants {
29
30 /** The "initialized" version. */
31 private final ObjectType initialized;
32
33 /**
34 * Creates a new instance.
35 *
36 * @param objectType uninitialized object type.
37 */
38 public UninitializedObjectType(final ObjectType objectType) {
39 super(Const.T_UNKNOWN, "<UNINITIALIZED OBJECT OF TYPE '" + objectType.getClassName() + "'>");
40 initialized = objectType;
41 }
42
43 /**
44 * Returns true on equality of this and o. Equality means the ObjectType instances of "initialized" equal one another in
45 * this and the o instance.
46 */
47 @Override
48 public boolean equals(final Object o) {
49 if (!(o instanceof UninitializedObjectType)) {
50 return false;
51 }
52 return initialized.equals(((UninitializedObjectType) o).initialized);
53 }
54
55 /**
56 * Returns the ObjectType of the same class as the one of the uninitialized object represented by this
57 * UninitializedObjectType instance.
58 *
59 * @return the ObjectType.
60 */
61 public ObjectType getInitialized() {
62 return initialized;
63 }
64
65 /**
66 * @return a hash code value for the object.
67 */
68 @Override
69 public int hashCode() {
70 return initialized.hashCode();
71 }
72 }