Handler.hxx

// 
// Copyright (C) 2006 James M. Lawrence.  All rights reserved.
// 
// software: esve-1.0.3
// file: esve/kernel/impl/Handler.hxx
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 
// 2. The origin of this software must not be misrepresented; you must
//    not claim that you wrote the original software.  If you use this
//    software in a product, an acknowledgment in the product 
//    documentation would be appreciated but is not required.
// 
// 3. Altered source versions must be plainly marked as such, and must
//    not be misrepresented as being the original software.
// 
// 4. The name of the author may not be used to endorse or promote
//    products derived from this software without specific prior written
//    permission.
// 
// THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY,
// AND WITH NO CLAIM AS TO ITS SUITABILITY FOR ANY PURPOSE.  IN NO EVENT
// SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM WHATSOEVER MADE IN CONNECTION
// TO THIS SOFTWARE.
// 

#ifndef esve_kernel_impl_Handler_hxx
#define esve_kernel_impl_Handler_hxx

#include <esve/kernel/Handler.hxx>
#include <memory>

namespace esve { namespace message {

class Handle_Receiver ;

}} // namespace esve::message

namespace esve { namespace kernel { namespace impl {


class Handler
    : virtual public kernel::Handler
{
public:
    impl::Handler & handler() ;

    ~Handler() = 0 ;

protected:
    Handler() ;
    
    //
    // After creating a Handle_Receiver which decodes data from a
    // Handle_Args instance, call this function to receive data from
    // the common decoder node.
    //
    // You almost certainly want to call this in the constructor.
    //
    void add_decoder( message::Handle_Receiver & ) ;

private:
    Handler( const Handler & ) ;
    Handler & operator=( const Handler & ) ;

    // Coupled implementation with Handler (mutual linking)
    friend class Emitter ;

    class Private ;
    const std::auto_ptr<Private> m ;
} ;

}}} // namespace esve::kernel::impl

#endif

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