1 /*
   2  * Copyright (c) 2014, 2015, 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.JavaKind;
  27 import jdk.vm.ci.meta.LIRKind;
  28 import jdk.vm.ci.meta.VMConstant;
  29 import jdk.vm.ci.meta.Value;
  30 
  31 public final class HotSpotSentinelConstant extends Value implements JavaConstant, VMConstant {
  32 
  33     private final JavaKind javaKind;
  34 
  35     public HotSpotSentinelConstant(LIRKind lirKind, JavaKind javaKind) {
  36         super(lirKind);
  37         this.javaKind = javaKind;
  38     }
  39 
  40     public JavaKind getJavaKind() {
  41         return javaKind;
  42     }
  43 
  44     @Override
  45     public boolean isNull() {
  46         return true;
  47     }
  48 
  49     @Override
  50     public boolean isDefaultForKind() {
  51         return true;
  52     }
  53 
  54     @Override
  55     public Object asBoxedPrimitive() {
  56         throw new IllegalArgumentException();
  57     }
  58 
  59     @Override
  60     public int asInt() {
  61         throw new IllegalArgumentException();
  62     }
  63 
  64     @Override
  65     public boolean asBoolean() {
  66         throw new IllegalArgumentException();
  67     }
  68 
  69     @Override
  70     public long asLong() {
  71         throw new IllegalArgumentException();
  72     }
  73 
  74     @Override
  75     public float asFloat() {
  76         throw new IllegalArgumentException();
  77     }
  78 
  79     @Override
  80     public double asDouble() {
  81         throw new IllegalArgumentException();
  82     }
  83 
  84     @Override
  85     public String toString() {
  86         return JavaConstant.toString(this);
  87     }
  88 
  89     @Override
  90     public String toValueString() {
  91         return "sentinel";
  92     }
  93 
  94     @Override
  95     public int hashCode() {
  96         return 13;
  97     }
  98 
  99     @Override
 100     public boolean equals(Object o) {
 101         return o instanceof HotSpotSentinelConstant;
 102     }
 103 }