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 java.util.*; 26 27 import jdk.vm.ci.hotspot.HotSpotVMConfig.*; 28 import jdk.vm.ci.meta.*; 29 30 public final class HotSpotMetaspaceConstantImpl extends PrimitiveConstant implements HotSpotMetaspaceConstant, VMConstant, HotSpotProxified { 31 32 static HotSpotMetaspaceConstantImpl forMetaspaceObject(JavaKind kind, long primitive, Object metaspaceObject, boolean compressed) { 33 return new HotSpotMetaspaceConstantImpl(kind, primitive, metaspaceObject, compressed); 34 } 35 36 static Object getMetaspaceObject(Constant constant) { 37 return ((HotSpotMetaspaceConstantImpl) constant).metaspaceObject; 38 } 39 40 private final Object metaspaceObject; 41 private final boolean compressed; 42 43 private HotSpotMetaspaceConstantImpl(JavaKind kind, long primitive, Object metaspaceObject, boolean compressed) { 44 super(kind, primitive); 45 this.metaspaceObject = metaspaceObject; 46 this.compressed = compressed; 47 } 48 49 @Override 50 public int hashCode() { 51 return super.hashCode() ^ System.identityHashCode(metaspaceObject); 52 } 53 54 @Override 55 public boolean equals(Object o) { 56 return o == this || (o instanceof HotSpotMetaspaceConstantImpl && super.equals(o) && Objects.equals(metaspaceObject, ((HotSpotMetaspaceConstantImpl) o).metaspaceObject)); 57 } 58 59 @Override 60 public String toString() { 61 return super.toString() + "{" + metaspaceObject + (compressed ? ";compressed}" : "}"); 62 } 63 64 public boolean isCompressed() { 65 return compressed; 66 } 67 68 public JavaConstant compress(CompressEncoding encoding) { 69 assert !isCompressed(); 70 HotSpotMetaspaceConstantImpl res = HotSpotMetaspaceConstantImpl.forMetaspaceObject(JavaKind.Int, encoding.compress(asLong()), metaspaceObject, true); 71 assert res.isCompressed(); 72 return res; 73 } 74 75 public JavaConstant uncompress(CompressEncoding encoding) { 76 assert isCompressed(); 77 HotSpotMetaspaceConstantImpl res = HotSpotMetaspaceConstantImpl.forMetaspaceObject(JavaKind.Long, encoding.uncompress(asInt()), metaspaceObject, false); 78 assert !res.isCompressed(); 79 return res; 80 } 81 82 public HotSpotResolvedObjectType asResolvedJavaType() { 83 if (metaspaceObject instanceof HotSpotResolvedObjectType) { 84 return (HotSpotResolvedObjectType) metaspaceObject; 85 } 86 return null; 87 } 88 89 public HotSpotResolvedJavaMethod asResolvedJavaMethod() { 90 if (metaspaceObject instanceof HotSpotResolvedJavaMethod) { 91 return (HotSpotResolvedJavaMethod) metaspaceObject; 92 } 93 return null; 94 } 95 96 public long rawValue() { 97 return asLong(); 98 } 99 }