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.meta; 24 25 /** 26 * The implementation type of the {@link JavaConstant#NULL_POINTER null constant}. 27 */ 28 final class NullConstant implements JavaConstant { 29 30 protected NullConstant() { 31 } 32 33 @Override 34 public JavaKind getJavaKind() { 35 return JavaKind.Object; 36 } 37 38 @Override 39 public boolean isNull() { 40 return true; 41 } 42 43 @Override 44 public boolean isDefaultForKind() { 45 return true; 46 } 47 48 @Override 49 public Object asBoxedPrimitive() { 50 throw new IllegalArgumentException(); 51 } 52 53 @Override 54 public int asInt() { 55 throw new IllegalArgumentException(); 56 } 57 58 @Override 59 public boolean asBoolean() { 60 throw new IllegalArgumentException(); 61 } 62 63 @Override 64 public long asLong() { 65 throw new IllegalArgumentException(); 66 } 67 68 @Override 69 public float asFloat() { 70 throw new IllegalArgumentException(); 71 } 72 73 @Override 74 public double asDouble() { 75 throw new IllegalArgumentException(); 76 } 77 78 @Override 79 public String toString() { 80 return JavaConstant.toString(this); 81 } 82 83 @Override 84 public String toValueString() { 85 return "null"; 86 } 87 88 @Override 89 public int hashCode() { 90 return 13; 91 } 92 93 @Override 94 public boolean equals(Object o) { 95 return o instanceof NullConstant; 96 } 97 }