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// -*- C++ -*-
//=============================================================================
/**
* @file Dynamic_Implementation.h
*
* $Id$
*
* Header file for class TAO_DynamicImplementation.
*
*
* @author Irfan Pyarali <irfan@cs.wustl.edu>
*/
//=============================================================================
#ifndef TAO_DYNAMIC_IMPLEMENTATION_H
#define TAO_DYNAMIC_IMPLEMENTATION_H
#include /**/ "ace/pre.h"
#include "tao/DynamicInterface/dynamicinterface_export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/PortableServer/Servant_Base.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace CORBA
{
typedef char *RepositoryId;
typedef String_var RepositoryId_var;
class ServerRequest;
typedef ServerRequest *ServerRequest_ptr;
}
/**
* @class TAO_DynamicImplementation
*
* @brief Base class for DSI.
*
* It is expected that the <invoke> and <_primary_interface>
* methods will be only invoked by the POA in the context of
* serving a CORBA request. Invoking this method in other
* circumstances may lead to unpredictable results.
*/
class TAO_DynamicInterface_Export TAO_DynamicImplementation
: public virtual TAO_ServantBase
{
public:
/// The invoke() method receives requests issued to any CORBA object
/// incarnated by the DSI servant and performs the processing
/// necessary to execute the request.
virtual void invoke (CORBA::ServerRequest_ptr request) = 0;
/// The _primary_interface() method receives an ObjectId value and a
/// POA_ptr as input parameters and returns a valid RepositoryId
/// representing the most-derived interface for that oid.
virtual CORBA::RepositoryId _primary_interface (
const PortableServer::ObjectId &oid,
PortableServer::POA_ptr poa) = 0;
/// Local implementation of the CORBA::Object::_is_a method.
virtual CORBA::Boolean _is_a (const char *logical_type_id);
/// Returns a CORBA::Object_ptr for the target object.
CORBA::Object_ptr _this (void);
/// Query the Interface Repository for the interface definition.
virtual CORBA::InterfaceDef_ptr _get_interface (void);
protected:
/// Return 0. Should never be used.
virtual const char *_interface_repository_id (void) const;
/// Simply returns "this"
virtual void *_downcast (const char *repository_id);
/// This is an auxiliary method for _this() and _narrow().
virtual TAO_Stub *_create_stub (void);
/// Turns around and calls invoke.
virtual void _dispatch (TAO_ServerRequest &request, void *context);
private:
/// Encapsulates code common to _is_a(), _get_interface() and _create_stub().
CORBA::RepositoryId get_id_from_primary_interface (void);
};
TAO_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* TAO_DYNAMIC_IMPLEMENTATION_H */
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