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// -*- C++ -*-
//=============================================================================
/**
* @file Exception.h
*
* $Id$
*
* This file defines way in which CORBA exceptions are reported.
*
* @author DOC Group at Vanderbilt U., Wash U, and UCI
*/
//=============================================================================
#ifndef TAO_EXCEPTION_H
#define TAO_EXCEPTION_H
#include /**/ "ace/pre.h"
// Do not try removing this. If you remove this for subsetting lots of
// things go wrong in TAO.
#include "tao/orbconf.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include /**/ "tao/TAO_Export.h"
#include "tao/Basic_Types.h"
#include "tao/CORBA_String.h"
#include "ace/SStringfwd.h"
#include "ace/iosfwd.h"
#include "ace/CORBA_macros.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
class ACE_Allocator;
ACE_END_VERSIONED_NAMESPACE_DECL
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
class TAO_OutputCDR;
class TAO_InputCDR;
// This is already done in orbconf.h. But this file is totally
// decoupled from its contents that we have to do this here. Including
// orbconf.h is probably going to be a overhead.
#if defined (minor)
#undef minor
#endif /* minor */
namespace CORBA
{
class TypeCode;
typedef TypeCode * TypeCode_ptr;
class Environment;
class Any;
typedef Any * Any_ptr;
class SystemException;
/**
* @enum exception_type
*
* @brief Enumeration used to identify the type of CORBA exception.
*
* CORBA exceptions generally fall into two categories, user
* exceptions and system exceptions. This enumeration is used when
* identifying the type of CORBA exception.
*/
enum exception_type
{
NO_EXCEPTION,
USER_EXCEPTION,
SYSTEM_EXCEPTION
};
/**
* @class Exception
*
* @brief Exception
*
* CORBA2-specified exception hierarchy. All exceptions have a
* type (represented by a @c TypeCode) and a widely scoped type ID
* (in the @c TypeCode) that are generated by any OMG-IDL compiler
* and available through the Interface Repository. Think of it as a
* "globally scoped" name distinguishing each exception.
*
* @todo According to the OMG CORBA C++ Mapping version 1.1,
* the copy constructors
* should be moved to "protected" section in class
* declarations. Since the current MS Visual C++ 7.1 compiler
* will cause some problems to TAO's exception mechanism, we
* defer doing this until we drop support for MSVC++ 7.1. Maybe
* there is another solution, have to test that later.
*/
class TAO_Export Exception
{
public:
/// Copy constructor.
/**
* @note This constructor should be protected, but VC7.1 at
* warning level 4 complains about the inaccessible copy
* constructor preventing it from being caught. However,
* that probably isn't true for most cases since CORBA
* exceptions are typically caught by reference, not by
* copy.
*/
Exception (const Exception &src);
/// Destructor.
virtual ~Exception (void);
// = To throw the exception (when using the standard mapping).
virtual void _raise (void) const = 0;
// = The static narrow operations.
static Exception * _downcast (Exception * x);
static Exception const * _downcast (Exception const * x);
/// Return the repository ID of the Exception.
virtual const char * _rep_id (void) const;
/// Return the name of the Exception.
virtual const char * _name (void) const;
// = These are TAO-specific extensions.
/// Will be overridden in the concrete derived classes.
virtual CORBA::TypeCode_ptr _tao_type (void) const = 0;
/// Print the exception to output determined by @a f.
/**
* @note This method is TAO-specific.
*/
void _tao_print_exception (const char *info, FILE *f = stdout) const;
#if defined (ACE_USES_WCHAR)
/// ACE_WCHAR_T version of _tao_print_exception.
/**
* @note This method is TAO-specific.
*/
void _tao_print_exception (const ACE_WCHAR_T *info, FILE *f = stdout) const;
#endif // ACE_USES_WCHAR
/// Returns a string containing information about the exception. This
/// function is not CORBA compliant.
virtual ACE_CString _info (void) const = 0;
virtual void _tao_encode (TAO_OutputCDR &cdr) const = 0;
virtual void _tao_decode (TAO_InputCDR &cdr) = 0;
/// Used in the non-copying Any insertion operator.
static void _tao_any_destructor (void *);
/// Deep copy
/**
* The following operation is used in the implementation of
* it performs a deep copy of the
* exception, normally it is implemented as:
*
* <PRE>
* class SomeException : public // Derives from CORBA::Exception
* {
* public:
* virtual CORBA::Exception *_tao_duplicate (void) const
* {
* CORBA::Exception *result = 0;
* ACE_NEW_RETURN (
* result,
* SomeException (*this),
* 0
* );
* return result;
* }
* };
* </PRE>
*/
virtual CORBA::Exception *_tao_duplicate (void) const = 0;
protected:
/// Default constructor.
Exception (void);
/// Assignment operator.
Exception & operator = (const Exception & src);
/// Construct from a repository id.
Exception (const char *repository_id, const char *local_name);
private:
/// Repository Id
CORBA::String_var id_;
/// Local name.
CORBA::String_var name_;
};
#if !defined (ACE_LACKS_IOSTREAM_TOTALLY)
// Required by C++ mapping.
TAO_Export ACE_OSTREAM_TYPE& operator<< (ACE_OSTREAM_TYPE &os,
const CORBA::Exception &e);
TAO_Export ACE_OSTREAM_TYPE& operator<< (ACE_OSTREAM_TYPE &os,
const CORBA::Exception *e);
#endif /* (ACE_LACKS_IOSTREAM_TOTALLY) */
} // End CORBA namespace
namespace TAO
{
/// Create a CORBA::SystemException given the interface repository ID.
TAO_Export CORBA::SystemException *create_system_exception (const char *id);
}
TAO_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
# include "tao/Exception.inl"
#endif /* __ACE_INLINE__ */
#include /**/"ace/post.h"
#endif /* TAO_EXCEPTION_H */
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