1 /* 2 * Copyright (c) 2014, 2019, 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.Objects; 26 27 import jdk.vm.ci.meta.Constant; 28 import jdk.vm.ci.meta.VMConstant; 29 30 final class HotSpotMetaspaceConstantImpl implements HotSpotMetaspaceConstant, VMConstant { 31 32 static HotSpotMetaspaceConstantImpl forMetaspaceObject(MetaspaceObject metaspaceObject, boolean compressed) { 33 return new HotSpotMetaspaceConstantImpl(metaspaceObject, compressed); 34 } 35 36 static MetaspaceObject getMetaspaceObject(Constant constant) { 37 return ((HotSpotMetaspaceConstantImpl) constant).metaspaceObject; 38 } 39 40 private final MetaspaceObject metaspaceObject; 41 private final boolean compressed; 42 43 private HotSpotMetaspaceConstantImpl(MetaspaceObject metaspaceObject, boolean compressed) { 44 this.metaspaceObject = metaspaceObject; 45 this.compressed = compressed; 46 } 47 48 @Override 49 public int hashCode() { 50 return System.identityHashCode(metaspaceObject) ^ (compressed ? 1 : 2); 51 } 52 53 @Override 54 public boolean equals(Object o) { 55 if (o == this) { 56 return true; 57 } 58 if (!(o instanceof HotSpotMetaspaceConstantImpl)) { 59 return false; 60 } 61 62 HotSpotMetaspaceConstantImpl other = (HotSpotMetaspaceConstantImpl) o; 63 return Objects.equals(this.metaspaceObject, other.metaspaceObject) && this.compressed == other.compressed; 64 } 65 66 @Override 67 public String toValueString() { 68 return String.format("meta{%s%s}", metaspaceObject, compressed ? ";compressed" : ""); 69 } 70 71 @Override 72 public String toString() { 73 return toValueString(); 74 } 75 76 @Override 77 public boolean isDefaultForKind() { 78 return false; 79 } 80 81 @Override 82 public boolean isCompressed() { 83 return compressed; 84 } 85 86 @Override 87 public Constant compress() { 88 assert !isCompressed(); 89 HotSpotMetaspaceConstantImpl res = HotSpotMetaspaceConstantImpl.forMetaspaceObject(metaspaceObject, true); 90 assert res.isCompressed(); 91 return res; 92 } 93 94 @Override 95 public Constant uncompress() { 96 assert isCompressed(); 97 HotSpotMetaspaceConstantImpl res = HotSpotMetaspaceConstantImpl.forMetaspaceObject(metaspaceObject, false); 98 assert !res.isCompressed(); 99 return res; 100 } 101 102 @Override 103 public HotSpotResolvedObjectType asResolvedJavaType() { 104 if (metaspaceObject instanceof HotSpotResolvedObjectType) { 105 return (HotSpotResolvedObjectType) metaspaceObject; 106 } 107 return null; 108 } 109 110 @Override 111 public HotSpotResolvedJavaMethod asResolvedJavaMethod() { 112 if (metaspaceObject instanceof HotSpotResolvedJavaMethod) { 113 return (HotSpotResolvedJavaMethod) metaspaceObject; 114 } 115 return null; 116 } 117 }