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  */
  23 package jdk.vm.ci.code.site;
  24 
  25 import java.util.Objects;
  26 
  27 import 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  */
  33 public 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 }