1 /*
   2  * Copyright (c) 1999, 2012, 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  */
  24 
  25 #ifndef SHARE_VM_CI_CIMETADATA_HPP
  26 #define SHARE_VM_CI_CIMETADATA_HPP
  27 
  28 #include "ci/ciBaseObject.hpp"
  29 #include "ci/ciClassList.hpp"
  30 #include "memory/allocation.hpp"
  31 #include "runtime/handles.hpp"
  32 #include "runtime/jniHandles.hpp"
  33 
  34 // ciMetadata
  35 //
  36 // Compiler interface to metadata object in the VM, not Java object.
  37 
  38 class ciMetadata: public ciBaseObject {
  39   CI_PACKAGE_ACCESS
  40   friend class ciEnv;
  41 
  42  protected:
  43   Metadata* _metadata;
  44 
  45   ciMetadata(): _metadata(NULL) {}
  46   ciMetadata(Metadata* o): _metadata(o) {}
  47 
  48   virtual bool is_classless() const         { return false; }
  49  public:
  50   bool is_loaded() const { return _metadata != NULL || is_classless(); }
  51 
  52   virtual bool is_metadata() const          { return true; }
  53 
  54   virtual bool is_type() const              { return false; }
  55   virtual bool is_cpcache() const           { return false; }
  56   virtual bool is_return_address() const    { return false; }
  57   virtual bool is_method() const            { return false; }
  58   virtual bool is_method_data() const       { return false; }
  59   virtual bool is_klass() const             { return false; }
  60   virtual bool is_instance_klass() const    { return false; }
  61   virtual bool is_valuetype() const         { return false; }
  62   virtual bool is_array_klass() const       { return false; }
  63   virtual bool is_value_array_klass() const { return false; }
  64   virtual bool is_obj_array_klass() const   { return false; }
  65   virtual bool is_type_array_klass() const  { return false; }
  66   virtual void dump_replay_data(outputStream* st) { /* do nothing */ }
  67 
  68   ciMethod*                as_method() {
  69     assert(is_method(), "bad cast");
  70     return (ciMethod*)this;
  71   }
  72   ciMethodData*            as_method_data() {
  73     assert(is_method_data(), "bad cast");
  74     return (ciMethodData*)this;
  75   }
  76   ciSymbol*                as_symbol() {
  77     assert(is_symbol(), "bad cast");
  78     return (ciSymbol*)this;
  79   }
  80   ciType*                  as_type() {
  81     assert(is_type(), "bad cast");
  82     return (ciType*)this;
  83   }
  84   ciReturnAddress*         as_return_address() {
  85     assert(is_return_address(), "bad cast");
  86     return (ciReturnAddress*)this;
  87   }
  88   ciKlass*                 as_klass() {
  89     assert(is_klass(), "bad cast");
  90     return (ciKlass*)this;
  91   }
  92   ciInstanceKlass*         as_instance_klass() {
  93     assert(is_instance_klass(), "bad cast");
  94     return (ciInstanceKlass*)this;
  95   }
  96   ciArrayKlass*            as_array_klass() {
  97     assert(is_array_klass(), "bad cast");
  98     return (ciArrayKlass*)this;
  99   }
 100   ciValueArrayKlass*       as_value_array_klass() {
 101     assert(is_value_array_klass(), "bad cast");
 102     return (ciValueArrayKlass*)this;
 103   }
 104   ciObjArrayKlass*         as_obj_array_klass() {
 105     assert(is_obj_array_klass(), "bad cast");
 106     return (ciObjArrayKlass*)this;
 107   }
 108   ciTypeArrayKlass*        as_type_array_klass() {
 109     assert(is_type_array_klass(), "bad cast");
 110     return (ciTypeArrayKlass*)this;
 111   }
 112   ciValueKlass*            as_value_klass() {
 113     assert(is_valuetype(), "bad cast");
 114     return (ciValueKlass*)this;
 115   }
 116 
 117   Metadata* constant_encoding() { return _metadata; }
 118 
 119   bool equals(ciMetadata* obj) const { return (this == obj); }
 120 
 121   int hash() { return ident() * 31; } // ???
 122 
 123   void print(outputStream* st);
 124   virtual void print_impl(outputStream* st) {}
 125   virtual const char* type_string() { return "ciMetadata"; }
 126 
 127   void print()  { print(tty); }
 128   void print_metadata(outputStream* st = tty);
 129 
 130 };
 131 #endif // SHARE_VM_CI_CIMETADATA_HPP