ConstantReference.java revision 12651:6ef01bd40ce2 
1/*
2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package jdk.vm.ci.code.site;
24
25import java.util.Objects;
26
27import jdk.vm.ci.meta.VMConstant;
28
29/**
30 * Represents an embedded {@link VMConstant} in the code or data section that needs to be
31 * {@link DataPatch patched} by the VM (e.g. an embedded pointer to a Java object).
32 */
33public final class ConstantReference extends Reference {
34
35    private final VMConstant constant;
36
37    public ConstantReference(VMConstant constant) {
38        this.constant = constant;
39    }
40
41    public VMConstant getConstant() {
42        return constant;
43    }
44
45    @Override
46    public String toString() {
47        return constant.toString();
48    }
49
50    @Override
51    public int hashCode() {
52        return constant.hashCode();
53    }
54
55    @Override
56    public boolean equals(Object obj) {
57        if (this == obj) {
58            return true;
59        }
60        if (obj instanceof ConstantReference) {
61            ConstantReference that = (ConstantReference) obj;
62            return Objects.equals(this.constant, that.constant);
63        }
64        return false;
65    }
66}
67