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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef _COM_SUN_STAR_UNO_REFERENCE_H_
#define _COM_SUN_STAR_UNO_REFERENCE_H_
#include <rtl/alloc.h>
namespace com
{
namespace sun
{
namespace star
{
namespace uno
{
class RuntimeException;
class XInterface;
class Type;
class Any;
/** Enum defining UNO_REF_NO_ACQUIRE for setting reference without acquiring a given interface.
Deprecated, please use SAL_NO_ACQUIRE.
@deprecated
*/
enum UnoReference_NoAcquire
{
/** This enum value can be used for creating a reference granting a given interface,
i.e. transferring ownership to it.
*/
UNO_REF_NO_ACQUIRE
};
/** This base class serves as a base class for all template reference classes and
has been introduced due to compiler problems with templated operators ==, =!.
*/
class BaseReference
{
protected:
/** the interface pointer
*/
XInterface * _pInterface;
/** Queries given interface for type rType.
@param pInterface interface pointer
@param rType interface type
@return interface of demanded type (may be null)
*/
inline static XInterface * SAL_CALL iquery( XInterface * pInterface, const Type & rType )
SAL_THROW( (RuntimeException) );
#ifndef EXCEPTIONS_OFF
/** Queries given interface for type rType.
Throws a RuntimeException if the demanded interface cannot be queried.
@param pInterface interface pointer
@param rType interface type
@return interface of demanded type
*/
inline static XInterface * SAL_CALL iquery_throw( XInterface * pInterface, const Type & rType )
SAL_THROW( (RuntimeException) );
#endif
public:
/** Gets interface pointer. This call does not acquire the interface.
@return UNacquired interface pointer
*/
inline XInterface * SAL_CALL get() const SAL_THROW( () )
{ return _pInterface; }
/** Checks if reference is null.
@return true if reference acquires an interface, i.e. true if it is not null
*/
inline sal_Bool SAL_CALL is() const SAL_THROW( () )
{ return (0 != _pInterface); }
/** Equality operator: compares two interfaces
Checks if both references are null or refer to the same object.
@param rRef another interface
@return true if both references are null or refer to the same object, false otherwise
*/
inline sal_Bool SAL_CALL operator == ( XInterface * pInterface ) const SAL_THROW( () );
/** Unequality operator: compares two interfaces
Checks if both references are null or refer to the same object.
@param rRef another interface
@return false if both references are null or refer to the same object, true otherwise
*/
inline sal_Bool SAL_CALL operator != ( XInterface * pInterface ) const SAL_THROW( () );
/** Equality operator: compares two interfaces
Checks if both references are null or refer to the same object.
@param rRef another reference
@return true if both references are null or refer to the same object, false otherwise
*/
inline sal_Bool SAL_CALL operator == ( const BaseReference & rRef ) const SAL_THROW( () );
/** Unequality operator: compares two interfaces
Checks if both references are null or refer to the same object.
@param rRef another reference
@return false if both references are null or refer to the same object, true otherwise
*/
inline sal_Bool SAL_CALL operator != ( const BaseReference & rRef ) const SAL_THROW( () );
/** Needed by some STL containers.
@param rRef another reference
@return true, if this reference is less than rRef
*/
inline sal_Bool SAL_CALL operator < ( const BaseReference & rRef ) const SAL_THROW( () );
};
/** Enum defining UNO_QUERY and UNO_REF_QUERY for implicit interface query.
*/
enum UnoReference_Query
{
/** This enum value can be used for implicit interface query.
*/
UNO_QUERY,
/** This enum value can be used for implicit interface query.
*/
UNO_REF_QUERY
};
#ifndef EXCEPTIONS_OFF
/** Enum defining UNO_QUERY_THROW and UNO_REF_QUERY_THROW for implicit interface query.
If the demanded interface is unavailable, then a RuntimeException is thrown.
*/
enum UnoReference_QueryThrow
{
/** This enum value can be used for implicit interface query.
*/
UNO_QUERY_THROW,
/** This enum value can be used for implicit interface query.
*/
UNO_REF_QUERY_THROW
};
/** Enum defining UNO_SET_THROW for throwing if attempts are made to assign a <NULL/>
interface
@since UDK 3.2.8
*/
enum UnoReference_SetThrow
{
UNO_SET_THROW
};
#endif
/** Template reference class for interface type derived from BaseReference.
A special constructor given the UNO_QUERY or UNO_REF_QUERY identifier queries interfaces
for reference type.
*/
template< class interface_type >
class Reference : public BaseReference
{
/** Queries given interface for type interface_type.
@param pInterface interface pointer
@return interface of demanded type (may be null)
*/
inline static XInterface * SAL_CALL iquery( XInterface * pInterface )
SAL_THROW( (RuntimeException) );
#ifndef EXCEPTIONS_OFF
/** Queries given interface for type interface_type.
Throws a RuntimeException if the demanded interface cannot be queried.
@param pInterface interface pointer
@return interface of demanded type
*/
inline static XInterface * SAL_CALL iquery_throw( XInterface * pInterface )
SAL_THROW( (RuntimeException) );
/** Returns the given interface if it is not <NULL/>, throws a RuntimeException otherwise.
@param pInterface interface pointer
@return pInterface
*/
inline static interface_type * SAL_CALL iset_throw( interface_type * pInterface )
SAL_THROW( (RuntimeException) );
#endif
/** Cast from an "interface pointer" (e.g., BaseReference::_pInterface) to a
pointer to this interface_type.
To work around ambiguities in the case of multiple-inheritance interface
types (which inherit XInterface more than once), use reinterpret_cast
(resp. a sequence of two static_casts, to avoid warnings about
reinterpret_cast used between related classes) to switch from a pointer
to XInterface to a pointer to this derived interface_type. In
principle, this is not guaranteed to work. In practice, it seems to
work on all supported platforms.
*/
static inline interface_type * castFromXInterface(XInterface * p) {
return static_cast< interface_type * >(static_cast< void * >(p));
}
/** Cast from a pointer to this interface_type to an "interface pointer"
(e.g., BaseReference::_pInterface).
To work around ambiguities in the case of multiple-inheritance interface
types (which inherit XInterface more than once), use reinterpret_cast
(resp. a sequence of two static_casts, to avoid warnings about
reinterpret_cast used between related classes) to switch from a pointer
to this derived interface_type to a pointer to XInterface. In
principle, this is not guaranteed to work. In practice, it seems to
work on all supported platforms.
*/
static inline XInterface * castToXInterface(interface_type * p) {
return static_cast< XInterface * >(static_cast< void * >(p));
}
public:
// these are here to force memory de/allocation to sal lib.
/** @internal */
inline static void * SAL_CALL operator new ( ::size_t nSize ) SAL_THROW( () )
{ return ::rtl_allocateMemory( nSize ); }
/** @internal */
inline static void SAL_CALL operator delete ( void * pMem ) SAL_THROW( () )
{ ::rtl_freeMemory( pMem ); }
/** @internal */
inline static void * SAL_CALL operator new ( ::size_t, void * pMem ) SAL_THROW( () )
{ return pMem; }
/** @internal */
inline static void SAL_CALL operator delete ( void *, void * ) SAL_THROW( () )
{}
/** Destructor: Releases interface if set.
*/
inline ~Reference() SAL_THROW( () );
/** Default Constructor: Sets null reference.
*/
inline Reference() SAL_THROW( () );
/** Copy constructor: Copies interface reference.
@param rRef another reference
*/
inline Reference( const Reference< interface_type > & rRef ) SAL_THROW( () );
/** Constructor: Sets given interface pointer.
@param pInterface an interface pointer
*/
inline Reference( interface_type * pInterface ) SAL_THROW( () );
/** Constructor: Sets given interface pointer without acquiring it.
@param pInterface another reference
@param dummy SAL_NO_ACQUIRE to force obvious distinction to other constructors
*/
inline Reference( interface_type * pInterface, __sal_NoAcquire ) SAL_THROW( () );
/** Constructor: Sets given interface pointer without acquiring it.
Deprecated, please use SAL_NO_ACQUIRE version.
@deprecated
@param pInterface another reference
@param dummy UNO_REF_NO_ACQUIRE to force obvious distinction to other constructors
*/
inline Reference( interface_type * pInterface, UnoReference_NoAcquire ) SAL_THROW( () );
/** Constructor: Queries given interface for reference interface type (interface_type).
@param rRef another reference
@param dummy UNO_QUERY or UNO_REF_QUERY to force obvious distinction to other constructors
*/
inline Reference( const BaseReference & rRef, UnoReference_Query ) SAL_THROW( (RuntimeException) );
/** Constructor: Queries given interface for reference interface type (interface_type).
@param pInterface an interface pointer
@param dummy UNO_QUERY to force obvious distinction to other constructors
*/
inline Reference( XInterface * pInterface, UnoReference_Query ) SAL_THROW( (RuntimeException) );
/** Constructor: Queries given any for reference interface type (interface_type).
@param rAny an any
@param dummy UNO_QUERY to force obvious distinction to other constructors
*/
inline Reference( const Any & rAny, UnoReference_Query ) SAL_THROW( (RuntimeException) );
#ifndef EXCEPTIONS_OFF
/** Constructor: Queries given interface for reference interface type (interface_type).
Throws a RuntimeException if the demanded interface cannot be queried.
@param rRef another reference
@param dummy UNO_QUERY_THROW or UNO_REF_QUERY_THROW to force obvious distinction
to other constructors
*/
inline Reference( const BaseReference & rRef, UnoReference_QueryThrow ) SAL_THROW( (RuntimeException) );
/** Constructor: Queries given interface for reference interface type (interface_type).
Throws a RuntimeException if the demanded interface cannot be queried.
@param pInterface an interface pointer
@param dummy UNO_QUERY_THROW or UNO_REF_QUERY_THROW to force obvious distinction
to other constructors
*/
inline Reference( XInterface * pInterface, UnoReference_QueryThrow ) SAL_THROW( (RuntimeException) );
/** Constructor: Queries given any for reference interface type (interface_type).
Throws a RuntimeException if the demanded interface cannot be queried.
@param rAny an any
@param dummy UNO_QUERY_THROW or UNO_REF_QUERY_THROW to force obvious distinction
to other constructors
*/
inline Reference( const Any & rAny, UnoReference_QueryThrow ) SAL_THROW( (RuntimeException) );
/** Constructor: assigns from the given interface of the same type. Throws a RuntimeException
if the source interface is <NULL/>.
@param rRef another interface reference of the same type
@param dummy UNO_SET_THROW to distinguish from default copy constructor
@since UDK 3.2.8
*/
inline Reference( const Reference< interface_type > & rRef, UnoReference_SetThrow ) SAL_THROW( (RuntimeException) );
/** Constructor: assigns from the given interface of the same type. Throws a RuntimeException
if the source interface is <NULL/>.
@param pInterface an interface pointer
@param dummy UNO_SET_THROW to distinguish from default assignment constructor
@since UDK 3.2.8
*/
inline Reference( interface_type * pInterface, UnoReference_SetThrow ) SAL_THROW( (RuntimeException) );
#endif
/** Cast operator to Reference< XInterface >: Reference objects are binary compatible and
any interface must be derived from com.sun.star.uno.XInterface.
This a useful direct cast possibility.
*/
inline SAL_CALL operator const Reference< XInterface > & () const SAL_THROW( () )
{ return * reinterpret_cast< const Reference< XInterface > * >( this ); }
/** Dereference operator: Used to call interface methods.
@return UNacquired interface pointer
*/
inline interface_type * SAL_CALL operator -> () const SAL_THROW( () )
{ return castFromXInterface(_pInterface); }
/** Gets interface pointer. This call does not acquire the interface.
@return UNacquired interface pointer
*/
inline interface_type * SAL_CALL get() const SAL_THROW( () )
{ return castFromXInterface(_pInterface); }
/** Clears reference, i.e. releases interface. Reference is null after clear() call.
*/
inline void SAL_CALL clear() SAL_THROW( () );
/** Sets the given interface. An interface already set will be released.
@param rRef another reference
@return true, if non-null interface was set
*/
inline sal_Bool SAL_CALL set( const Reference< interface_type > & rRef ) SAL_THROW( () );
/** Sets the given interface. An interface already set will be released.
@param pInterface another interface
@return true, if non-null interface was set
*/
inline sal_Bool SAL_CALL set( interface_type * pInterface ) SAL_THROW( () );
/** Sets interface pointer without acquiring it. An interface already set will be released.
@param pInterface an interface pointer
@param dummy SAL_NO_ACQUIRE to force obvious distinction to set methods
@return true, if non-null interface was set
*/
inline sal_Bool SAL_CALL set( interface_type * pInterface, __sal_NoAcquire ) SAL_THROW( () );
/** Sets interface pointer without acquiring it. An interface already set will be released.
Deprecated, please use SAL_NO_ACQUIRE version.
@deprecated
@param pInterface an interface pointer
@param dummy UNO_REF_NO_ACQUIRE to force obvious distinction to set methods
@return true, if non-null interface was set
*/
inline sal_Bool SAL_CALL set( interface_type * pInterface, UnoReference_NoAcquire ) SAL_THROW( () );
/** Queries given interface for reference interface type (interface_type) and sets it.
An interface already set will be released.
@param pInterface an interface pointer
@param dummy UNO_QUERY or UNO_REF_QUERY to force obvious distinction to set methods
@return true, if non-null interface was set
*/
inline sal_Bool SAL_CALL set( XInterface * pInterface, UnoReference_Query ) SAL_THROW( (RuntimeException) );
/** Queries given interface for reference interface type (interface_type) and sets it.
An interface already set will be released.
@param rRef another reference
@param dummy UNO_QUERY or UNO_REF_QUERY to force obvious distinction to set methods
@return true, if non-null interface was set
*/
inline sal_Bool SAL_CALL set( const BaseReference & rRef, UnoReference_Query ) SAL_THROW( (RuntimeException) );
/** Queries given any for reference interface type (interface_type)
and sets it. An interface already set will be released.
@param rAny
an Any containing an interface
@param dummy
UNO_QUERY or UNO_REF_QUERY to force obvious distinction
to set methods
@return
true, if non-null interface was set
*/
inline bool set( Any const & rAny, UnoReference_Query );
#ifndef EXCEPTIONS_OFF
/** Queries given interface for reference interface type (interface_type) and sets it.
An interface already set will be released.
Throws a RuntimeException if the demanded interface cannot be set.
@param pInterface an interface pointer
@param dummy UNO_QUERY_THROW or UNO_REF_QUERY_THROW to force obvious distinction
to set methods
*/
inline void SAL_CALL set( XInterface * pInterface, UnoReference_QueryThrow ) SAL_THROW( (RuntimeException) );
/** Queries given interface for reference interface type (interface_type) and sets it.
An interface already set will be released.
Throws a RuntimeException if the demanded interface cannot be set.
@param rRef another reference
@param dummy UNO_QUERY_THROW or UNO_REF_QUERY_THROW to force obvious distinction
to set methods
*/
inline void SAL_CALL set( const BaseReference & rRef, UnoReference_QueryThrow ) SAL_THROW( (RuntimeException) );
/** Queries given any for reference interface type (interface_type) and
sets it. An interface already set will be released.
Throws a RuntimeException if the demanded interface cannot be set.
@param rAny
an Any containing an interface
@param dummy
UNO_QUERY_THROW or UNO_REF_QUERY_THROW to force obvious
distinction to set methods
*/
inline void set( Any const & rAny, UnoReference_QueryThrow );
/** sets the given interface
An interface already set will be released.
Throws a RuntimeException if the source interface is <NULL/>.
@param pInterface an interface pointer
@param dummy UNO_SET_THROW to force obvious distinction to other set methods
@since UDK 3.2.8
*/
inline void SAL_CALL set( interface_type * pInterface, UnoReference_SetThrow ) SAL_THROW( (RuntimeException) );
/** sets the given interface
An interface already set will be released.
Throws a RuntimeException if the source interface is <NULL/>.
@param rRef an interface reference
@param dummy UNO_SET_THROW to force obvious distinction to other set methods
@since UDK 3.2.8
*/
inline void SAL_CALL set( const Reference< interface_type > & rRef, UnoReference_SetThrow ) SAL_THROW( (RuntimeException) );
#endif
/** Assignment operator: Acquires given interface pointer and sets reference.
An interface already set will be released.
@param pInterface an interface pointer
@return this reference
*/
inline Reference< interface_type > & SAL_CALL operator = ( interface_type * pInterface ) SAL_THROW( () );
/** Assignment operator: Acquires given interface reference and sets reference.
An interface already set will be released.
@param rRef an interface reference
@return this reference
*/
inline Reference< interface_type > & SAL_CALL operator = ( const Reference< interface_type > & rRef ) SAL_THROW( () );
/** Queries given interface reference for type interface_type.
@param rRef interface reference
@return interface reference of demanded type (may be null)
*/
inline static Reference< interface_type > SAL_CALL query( const BaseReference & rRef ) SAL_THROW( (RuntimeException) );
/** Queries given interface for type interface_type.
@param pInterface interface pointer
@return interface reference of demanded type (may be null)
*/
inline static Reference< interface_type > SAL_CALL query( XInterface * pInterface ) SAL_THROW( (RuntimeException) );
};
/** @internal
Enables boost::mem_fn and boost::bind to recognize Reference.
*/
template <typename T>
inline T * get_pointer( Reference<T> const& r )
{
return r.get();
}
}
}
}
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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