/*

 * 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

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 */

// ciKlass

//

// This class and its subclasses represent klassOops in the

// HotSpot virtual machine.  In the vm, each klassOop contains an

// embedded Klass object.  ciKlass is subclassed to explicitly

// represent the kind of Klass embedded in the klassOop.  For

// example, a klassOop with an embedded objArrayKlass object is

// represented in the ciObject hierarchy by the class

// ciObjArrayKlass.

class ciKlass : public ciType {

  CI_PACKAGE_ACCESS

  friend class ciEnv;

  friend class ciField;

  friend class ciMethod;

  friend class ciObjArrayKlass;

private:

  ciSymbol* _name;

  jint _layout_helper;

protected:

  ciKlass(KlassHandle k_h, ciSymbol* name);

  ciKlass(ciSymbol* name, ciKlass* klass);

  klassOop get_klassOop() const {

    klassOop k = (klassOop)get_oop();

    assert(k != NULL, "illegal use of unloaded klass");

    return k;

  }

  Klass*   get_Klass() const { return get_klassOop()->klass_part(); }

  // Certain subklasses have an associated class loader.

  virtual oop loader()             { return NULL; }

  virtual jobject loader_handle()  { return NULL; }

  virtual oop protection_domain()             { return NULL; }

  virtual jobject protection_domain_handle()  { return NULL; }

  const char* type_string() { return "ciKlass"; }

  void print_impl(outputStream* st);

public:

  ciKlass(KlassHandle k_h);

  // What is the name of this klass?

  ciSymbol* name() const { return _name; }

  // What is its layout helper value?

  jint layout_helper() { return _layout_helper; }

  bool is_subtype_of(ciKlass* klass);

  bool is_subclass_of(ciKlass* klass);

  juint super_depth();

  juint super_check_offset();

  ciKlass* super_of_depth(juint i);

  bool can_be_primary_super();

  static juint primary_super_limit() { return Klass::primary_super_limit(); }

  // Get the shared parent of two klasses.

  ciKlass* least_common_ancestor(ciKlass* k);

  virtual bool is_interface() {

    return false;

  }

  virtual bool is_abstract() {

    return false;

  }

  // Does this type (array, class, interface) have no subtypes?

  virtual bool is_leaf_type() {

    return false;

  }

  // Attempt to get a klass using this ciKlass's loader.

  ciKlass* find_klass(ciSymbol* klass_name);

  // Note:  To find a class from its name string, use ciSymbol::make,

  // but consider adding to vmSymbols.hpp instead.

  // Get the instance of java.lang.Class corresponding to this klass.

  ciInstance*            java_mirror();

  // Fetch Klass::modifier_flags.

  jint                   modifier_flags();

  // Fetch Klass::access_flags.

  jint                   access_flags();

  // What kind of ciObject is this?

  bool is_klass() { return true; }

  void print_name_on(outputStream* st);

};