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// $Id$
//===================================================================
//
// = FILENAME
// File_i.h
//
// = DESCRIPTION
// Defines the implementation classes for the File IDL
// module
//
// = AUTHOR
// Irfan Pyarali
//
//====================================================================
#include "FileS.h"
class FileImpl
// FileImpl class provides the namespace for the File IDL module .
{
public:
class Descriptor : public POA_File::Descriptor
// Descriptor implements the Descriptor interface in the File Module
// A single Descriptor servant can serve multiple object references
{
public:
//Constructor
Descriptor (PortableServer::POA_ptr poa);
//Destructor
~Descriptor (void);
// Returns the default POA of this object
PortableServer::POA_ptr _default_POA (CORBA::Environment &env);
// write buffer to File corresponding to this Descriptor
virtual CORBA::Long write (const File::Descriptor::DataBuffer &buffer,
CORBA::Environment &env);
// Reads num_bytes from the file and returns it
virtual File::Descriptor::DataBuffer *read (CORBA::Long num_bytes,
CORBA::Environment &env);
// seek to the offset in file from whence
virtual CORBA::ULong lseek (CORBA::ULong offset,
CORBA::Long whence,
CORBA::Environment &env);
// closes the file corresponding to the requested ObjectID
virtual void destroy (CORBA::Environment &env);
private:
// Extracts the ACE_HANDLE from the objectID
ACE_HANDLE fd (CORBA::Environment &env);
PortableServer::POA_var poa_;
};
class System : public POA_File::System
// File System implementation class
{
public:
// Constructor, Creates a single File Descriptor Servant and
// registers it with the POA as the Default Servant
System (PortableServer::POA_ptr poa);
//Destructor
~System (void);
//Returns the default POA of this object
PortableServer::POA_ptr _default_POA (CORBA::Environment &env);
//Opens a file ,creates a Descriptor reference with the ACE_HANDLE
// and returns that reference
File::Descriptor_ptr open (const char *file_name,
CORBA::Long flags,
CORBA::Environment &env);
private:
PortableServer::POA_var poa_;
// The single File Descriptor servant which serves requests for any
// Descriptor object under poa_.
Descriptor fd_servant_;
};
};
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