/*

 * Copyright (c) 1999, 2010, 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

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 *

 */

#ifndef SHARE_VM_CI_CINULLOBJECT_HPP

#define SHARE_VM_CI_CINULLOBJECT_HPP

#include "ci/ciClassList.hpp"

#include "ci/ciObject.hpp"

#include "ci/ciUtilities.hpp"

// ciNullObject

//

// This class represents a null reference in the VM.

class ciNullObject : public ciObject {

  CI_PACKAGE_ACCESS

private:

  ciNullObject() : ciObject() {}

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

  void print_impl(outputStream* st);

public:

  // Is this ciObject a Java Language Object?  That is,

  // is the ciObject an instance or an array

  bool is_java_object() { return true; }

  // What kind of ciObject is this?

  bool is_null_object() const { return true; }

  bool is_classless() const   { return true; }

  // Get the distinguished instance of this klass.

  static ciNullObject* make();

};

#endif // SHARE_VM_CI_CINULLOBJECT_HPP