| /* |
| * Copyright (c) 2014, 2015, 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.hotspot; |
| |
| import jdk.vm.ci.meta.Constant; |
| import jdk.vm.ci.meta.JavaConstant; |
| import jdk.vm.ci.meta.JavaKind; |
| |
| /** |
| * The compressed representation of the {@link JavaConstant#NULL_POINTER null constant}. |
| */ |
| public final class HotSpotCompressedNullConstant implements JavaConstant, HotSpotConstant { |
| |
| public static final JavaConstant COMPRESSED_NULL = new HotSpotCompressedNullConstant(); |
| |
| private HotSpotCompressedNullConstant() { |
| } |
| |
| public JavaKind getJavaKind() { |
| return JavaKind.Object; |
| } |
| |
| @Override |
| public boolean isNull() { |
| return true; |
| } |
| |
| @Override |
| public boolean isCompressed() { |
| return true; |
| } |
| |
| public Constant compress() { |
| throw new IllegalArgumentException(); |
| } |
| |
| public Constant uncompress() { |
| return NULL_POINTER; |
| } |
| |
| @Override |
| public boolean isDefaultForKind() { |
| return true; |
| } |
| |
| @Override |
| public Object asBoxedPrimitive() { |
| throw new IllegalArgumentException(); |
| } |
| |
| @Override |
| public int asInt() { |
| throw new IllegalArgumentException(); |
| } |
| |
| @Override |
| public boolean asBoolean() { |
| throw new IllegalArgumentException(); |
| } |
| |
| @Override |
| public long asLong() { |
| throw new IllegalArgumentException(); |
| } |
| |
| @Override |
| public float asFloat() { |
| throw new IllegalArgumentException(); |
| } |
| |
| @Override |
| public double asDouble() { |
| throw new IllegalArgumentException(); |
| } |
| |
| @Override |
| public String toString() { |
| return JavaConstant.toString(this); |
| } |
| |
| @Override |
| public String toValueString() { |
| return "null"; |
| } |
| |
| @Override |
| public int hashCode() { |
| return System.identityHashCode(this); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| return o instanceof HotSpotCompressedNullConstant; |
| } |
| } |