/*
 * Copyright (c) 2009, 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package jdk.vm.ci.code.site;

import java.util.Objects;

import jdk.vm.ci.meta.VMConstant;

/**
 * Represents an embedded {@link VMConstant} in the code or data section that needs to be
 * {@link DataPatch patched} by the VM (e.g. an embedded pointer to a Java object).
 */
public final class ConstantReference extends Reference {

    private final VMConstant constant;

    public ConstantReference(VMConstant constant) {
        this.constant = constant;
    }

    public VMConstant getConstant() {
        return constant;
    }

    @Override
    public String toString() {
        return constant.toString();
    }

    @Override
    public int hashCode() {
        return constant.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof ConstantReference) {
            ConstantReference that = (ConstantReference) obj;
            return Objects.equals(this.constant, that.constant);
        }
        return false;
    }
}