1 /*
   2  * Copyright (c) 2017, 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.hotspot;
  24 
  25 import jdk.vm.ci.meta.JavaConstant;
  26 import jdk.vm.ci.meta.ResolvedJavaType;
  27 
  28 /**
  29  * Represents a constant that was retrieved from a constant pool.
  30  * Used to keep track of the constant pool slot for the constant.
  31  */
  32 public final class HotSpotConstantPoolObject extends HotSpotObjectConstantImpl {
  33 
  34     static JavaConstant forObject(HotSpotResolvedObjectType type, int cpi, Object object) {
  35         return new HotSpotConstantPoolObject(type, cpi, object);
  36     }
  37 
  38     public static JavaConstant forObject(HotSpotResolvedObjectType type, int cpi, JavaConstant object) {
  39         return forObject(type, cpi, ((HotSpotObjectConstantImpl)object).object());
  40     }
  41 
  42     private final HotSpotResolvedObjectType type;
  43     private final int cpi;
  44 
  45     public HotSpotResolvedObjectType getCpType() { return type; }
  46     public int getCpi()  { return cpi; }
  47 
  48     HotSpotConstantPoolObject(HotSpotResolvedObjectType type, int cpi, Object object) {
  49         super(object, false);
  50         this.type = type;
  51         this.cpi = cpi;
  52     }
  53 
  54     @Override
  55     public boolean equals(Object o) {
  56         if (o instanceof HotSpotConstantPoolObject) {
  57             if (super.equals(o)) {
  58                 HotSpotConstantPoolObject other = (HotSpotConstantPoolObject) o;
  59                 return type == other.type && cpi == other.cpi;
  60             }
  61         }
  62         return false;
  63     }
  64 
  65     @Override
  66     public String toValueString() {
  67         return getCpType().getName() + getCpi();
  68     }
  69 
  70     @Override
  71     public String toString() {
  72         return super.toString() + "@" + toValueString();
  73     }
  74 
  75 }