001/*
002 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.truffle.nodes;
024
025import java.util.*;
026
027import jdk.internal.jvmci.meta.*;
028
029/**
030 * A {@link LocationIdentity} wrapping an object.
031 */
032public final class ObjectLocationIdentity extends LocationIdentity {
033
034    private JavaConstant object;
035
036    public static LocationIdentity create(JavaConstant object) {
037        assert object.getKind() == Kind.Object && object.isNonNull();
038        return new ObjectLocationIdentity(object);
039    }
040
041    @Override
042    public boolean equals(Object obj) {
043        if (obj instanceof ObjectLocationIdentity) {
044            ObjectLocationIdentity that = (ObjectLocationIdentity) obj;
045            return Objects.equals(that.object, this.object);
046        }
047        return false;
048    }
049
050    @Override
051    public int hashCode() {
052        return object.hashCode();
053    }
054
055    private ObjectLocationIdentity(JavaConstant object) {
056        this.object = object;
057    }
058
059    @Override
060    public boolean isImmutable() {
061        return false;
062    }
063
064    @Override
065    public String toString() {
066        return "Identity(" + object + ")";
067    }
068}