Java example source code file (ciMetadata.hpp)

This example Java source code file (ciMetadata.hpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

ci_package_access, metadata, null, share_vm_ci_cimetadata_hpp

The ciMetadata.hpp Java example source code

/*
 * Copyright (c) 1999, 2012, 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.
 *
 */

#ifndef SHARE_VM_CI_CIMETADATA_HPP
#define SHARE_VM_CI_CIMETADATA_HPP

#include "ci/ciBaseObject.hpp"
#include "ci/ciClassList.hpp"
#include "memory/allocation.hpp"
#include "runtime/handles.hpp"
#include "runtime/jniHandles.hpp"

// ciMetadata
//
// Compiler interface to metadata object in the VM, not Java object.

class ciMetadata: public ciBaseObject {
  CI_PACKAGE_ACCESS
  friend class ciEnv;

 protected:
  Metadata* _metadata;

  ciMetadata(): _metadata(NULL) {}
  ciMetadata(Metadata* o): _metadata(o) {}

  virtual bool is_classless() const         { return false; }
 public:
  bool is_loaded() const { return _metadata != NULL || is_classless(); }

  virtual bool is_metadata() const          { return true; }

  virtual bool is_type() const              { return false; }
  virtual bool is_cpcache() const           { return false; }
  virtual bool is_return_address() const    { return false; }
  virtual bool is_method() const            { return false; }
  virtual bool is_method_data() const       { return false; }
  virtual bool is_klass() const             { return false; }
  virtual bool is_instance_klass() const    { return false; }
  virtual bool is_array_klass() const       { return false; }
  virtual bool is_obj_array_klass() const   { return false; }
  virtual bool is_type_array_klass() const  { return false; }
  virtual void dump_replay_data(outputStream* st) { /* do nothing */ }

  ciMethod*                as_method() {
    assert(is_method(), "bad cast");
    return (ciMethod*)this;
  }
  ciMethodData*            as_method_data() {
    assert(is_method_data(), "bad cast");
    return (ciMethodData*)this;
  }
  ciSymbol*                as_symbol() {
    assert(is_symbol(), "bad cast");
    return (ciSymbol*)this;
  }
  ciType*                  as_type() {
    assert(is_type(), "bad cast");
    return (ciType*)this;
  }
  ciReturnAddress*         as_return_address() {
    assert(is_return_address(), "bad cast");
    return (ciReturnAddress*)this;
  }
  ciKlass*                 as_klass() {
    assert(is_klass(), "bad cast");
    return (ciKlass*)this;
  }
  ciInstanceKlass*         as_instance_klass() {
    assert(is_instance_klass(), "bad cast");
    return (ciInstanceKlass*)this;
  }
  ciArrayKlass*            as_array_klass() {
    assert(is_array_klass(), "bad cast");
    return (ciArrayKlass*)this;
  }
  ciObjArrayKlass*         as_obj_array_klass() {
    assert(is_obj_array_klass(), "bad cast");
    return (ciObjArrayKlass*)this;
  }
  ciTypeArrayKlass*        as_type_array_klass() {
    assert(is_type_array_klass(), "bad cast");
    return (ciTypeArrayKlass*)this;
  }

  Metadata* constant_encoding() { return _metadata; }

  bool equals(ciMetadata* obj) const { return (this == obj); }

  int hash() { return ident() * 31; } // ???

  void print(outputStream* st);
  virtual void print_impl(outputStream* st) {}
  virtual const char* type_string() { return "ciMetadata"; }

  void print()  { print(tty); }
  void print_metadata(outputStream* st = tty);

};
#endif // SHARE_VM_CI_CIMETADATA_HPP