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.commons.compress.harmony.unpack200.bytecode;
18
19 import java.util.Objects;
20
21 /**
22 * Abstract superclass for constant pool constant entries such as numbers or Strings
23 */
24 public abstract class CPConstant extends ConstantPoolEntry {
25
26 private final Object value;
27
28 /**
29 * Constructs a new CPConstant.
30 *
31 * @param tag TODO
32 * @param value TODO
33 * @param globalIndex index in CpBands
34 * @throws NullPointerException if value is null
35 */
36 public CPConstant(final byte tag, final Object value, final int globalIndex) {
37 super(tag, globalIndex);
38 this.value = Objects.requireNonNull(value, "value");
39 }
40
41 @Override
42 public boolean equals(final Object obj) {
43 if (this == obj) {
44 return true;
45 }
46 if (obj == null) {
47 return false;
48 }
49 if (this.getClass() != obj.getClass()) {
50 return false;
51 }
52 final CPConstant other = (CPConstant) obj;
53 if (!Objects.equals(value, other.value)) {
54 return false;
55 }
56 return true;
57 }
58
59 protected Object getValue() {
60 return value;
61 }
62
63 @Override
64 public int hashCode() {
65 return Objects.hash(value);
66 }
67 }