1 /*
   2  * Copyright (c) 2011, 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.JavaKind;
  26 import jdk.vm.ci.meta.JavaType;
  27 import jdk.vm.ci.meta.ResolvedJavaType;
  28 
  29 /**
  30  * Implementation of {@link JavaType} for unresolved HotSpot classes.
  31  */
  32 final class HotSpotUnresolvedJavaType extends HotSpotJavaType {
  33 
  34     private final HotSpotJVMCIRuntimeProvider runtime;
  35 
  36     private HotSpotUnresolvedJavaType(String name, HotSpotJVMCIRuntimeProvider runtime) {
  37         super(name);
  38         assert name.charAt(0) == '[' || name.charAt(name.length() - 1) == ';' : name;
  39         this.runtime = runtime;
  40     }
  41 
  42     /**
  43      * Creates an unresolved type for a valid {@link JavaType#getName() type name}.
  44      */
  45     static HotSpotUnresolvedJavaType create(HotSpotJVMCIRuntimeProvider runtime, String name) {
  46         return new HotSpotUnresolvedJavaType(name, runtime);
  47     }
  48 
  49     @Override
  50     public JavaType getComponentType() {
  51         assert getName().charAt(0) == '[' : "no array class" + getName();
  52         return new HotSpotUnresolvedJavaType(getName().substring(1), runtime);
  53     }
  54 
  55     @Override
  56     public JavaType getArrayClass() {
  57         return new HotSpotUnresolvedJavaType('[' + getName(), runtime);
  58     }
  59 
  60     @Override
  61     public JavaKind getJavaKind() {
  62         return JavaKind.Object;
  63     }
  64 
  65     @Override
  66     public int hashCode() {
  67         return getName().hashCode();
  68     }
  69 
  70     @Override
  71     public boolean equals(Object obj) {
  72         if (this == obj) {
  73             return true;
  74         }
  75         if (obj == null || !(obj instanceof HotSpotUnresolvedJavaType)) {
  76             return false;
  77         }
  78         HotSpotUnresolvedJavaType that = (HotSpotUnresolvedJavaType) obj;
  79         return this.getName().equals(that.getName());
  80     }
  81 
  82     @Override
  83     public String toString() {
  84         return "HotSpotType<" + getName() + ", unresolved>";
  85     }
  86 
  87     @Override
  88     public ResolvedJavaType resolve(ResolvedJavaType accessingClass) {
  89         return (ResolvedJavaType) runtime.lookupType(getName(), (HotSpotResolvedObjectType) accessingClass, true);
  90     }
  91 
  92     /**
  93      * Try to find a loaded version of this class.
  94      *
  95      * @param accessingClass
  96      * @return the resolved class or null.
  97      */
  98     ResolvedJavaType reresolve(HotSpotResolvedObjectType accessingClass) {
  99         JavaType type = runtime.lookupType(getName(), accessingClass, false);
 100         if (type instanceof ResolvedJavaType) {
 101             return (ResolvedJavaType) type;
 102         }
 103         return null;
 104     }
 105 }