coherence/lang/TypedBarrenClass.hpp

/*
* TypedBarrenClass.hpp
*
* Copyright (c) 2000, 2009, Oracle and/or its affiliates. All rights reserved.
*
* Oracle is a registered trademarks of Oracle Corporation and/or its
* affiliates.
*
* This software is the confidential and proprietary information of Oracle
* Corporation. You shall not disclose such confidential and proprietary
* information and shall use it only in accordance with the terms of the
* license agreement you entered into with Oracle.
*
* This notice may not be removed or altered.
*/
#ifndef COH_TYPED_BARREN_CLASS_HPP
#define COH_TYPED_BARREN_CLASS_HPP

#include "coherence/lang/compatibility.hpp"

#include "coherence/lang/Class.hpp"
#include "coherence/lang/ClassLoader.hpp"
#include "coherence/lang/UnsupportedOperationException.hpp"

#include <ostream>
#include <typeinfo>

COH_OPEN_NAMESPACE2(coherence,lang)


/**
* TypedBarrenClass provides a templated extension of Class but does not
* provide a means to instantiate new instances of the class.
*
* This is suitable for use with interfaces, abstract classes, and classes
* which do not have a zero-argument create method.
*
* @author mf/jh  2008.05.02
*/
template<class T> class TypedBarrenClass
    : public class_spec<TypedBarrenClass<T>,
        extends<Class> >
    {
    friend class factory<TypedBarrenClass<T> >;

    // ----- typedefs -------------------------------------------------------

    public:
        /**
        * Class type.
        */
        typedef T Type;


    // ----- constructors ---------------------------------------------------

    protected:
        /**
        * Create a new TypedBarrenClass.
        *
        * @return a new TypedBarrenClass
        */
        TypedBarrenClass<T>()
            : class_spec<TypedBarrenClass<T>, extends<Class> >(typeid(T))
            {
            }


    // ----- TypedBarrenClass interface -------------------------------------

    public:
        /**
        * {@inheritDoc}
        *
        * @throws UnsupportedOperationException
        */
        virtual Object::Handle newInstance(ObjectArray::View /*vaParam*/) const
            {
            if (true)
                {
                COH_THROW (UnsupportedOperationException::create(Class::getName()));
                }
            return NULL;
            }

        /**
        * {@inheritDoc}
        */
        virtual const std::type_info& getTypeInfo() const
            {
            return typeid(T);
            }

        /**
        * {@inheritDoc}
        */
        virtual size32_t getSize() const
            {
            return (size32_t) sizeof(T);
            }


    // ----- Object interface -----------------------------------------------

    public:
        /**
        * {@inheritDoc}
        */
        virtual void toStream(std::ostream& out) const
            {
            out << "TypedBarrenClass<" << Class::getName() << ">";
            }
    };

COH_CLOSE_NAMESPACE2

#endif // COH_TYPED_BARREN_CLASS_HPP

Copyright (c) 2000, 2009, Oracle and/or its affiliates. All rights reserved.