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libreoffice/cppuhelper/inc/cppuhelper/interfacecontainer.h
Oliver Bolte a2c8e88278 INTEGRATION: CWS dba202a (1.17.10); FILE MERGED 
2005/11/28 14:49:21 fs 1.17.10.2: don't use OWeakObject::operator*, as per Daniel Boelzle's suggestion, but make casting explicit
2005/11/25 13:34:38 fs 1.17.10.1: +notifyEach: simplify calling forEach for a fixed-signature class of UNO listener methods
2005-12-21 12:19:23 +00:00

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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: interfacecontainer.h,v $
*
* $Revision: 1.18 $
*
* last change: $Author: obo $ $Date: 2005-12-21 13:19:23 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#ifndef _CPPUHELPER_INTERFACECONTAINER_H_
#define _CPPUHELPER_INTERFACECONTAINER_H_
#include <hash_map>
#include <functional>
#ifndef _OSL_MUTEX_HXX_
#include <osl/mutex.hxx>
#endif
#ifndef _RTL_ALLOC_H_
#include <rtl/alloc.h>
#endif
#ifndef _COM_SUN_STAR_UNO_SEQUENCE_HXX_
#include <com/sun/star/uno/Sequence.hxx>
#endif
#ifndef _COM_SUN_STAR_UNO_XINTERFACE_HPP_
#include <com/sun/star/uno/XInterface.hpp>
#endif
#ifndef _COM_SUN_STAR_LANG_EVENTOBJECT_HXX_
#include <com/sun/star/lang/EventObject.hpp>
#endif
#ifndef _COM_SUN_STAR_LANG_DISPOSEDEXCEPTION_HXX_
#include "com/sun/star/lang/DisposedException.hpp"
#endif
/** */ //for docpp
namespace cppu
{
//===================================================================
class OInterfaceContainerHelper;
/**
This is the iterator of a InterfaceContainerHelper. Typically
one constructs an instance on the stack for one firing session.
It is not allowed to assign or copy an instance of this class.
@see OInterfaceContainerHelper
*/
class OInterfaceIteratorHelper
{
public:
/**
Create an iterator over the elements of the container. The iterator
copies the elements of the conatainer. A change to the container
during the lifetime of an iterator is allowed and does not
affect the iterator-instance. The iterator and the container take cares
themself for concurrent access, no additional guarding is necessary.
Remark: The copy is on demand. The iterator copy the elements only if the container
change the contents. It is not allowed to destroy the container as long
as an iterator exist.
@param rCont the container of the elements.
*/
OInterfaceIteratorHelper( OInterfaceContainerHelper & rCont ) SAL_THROW( () );
/**
Releases the connection to the container.
*/
~OInterfaceIteratorHelper() SAL_THROW( () );
/** Return sal_True, if there are more elements in the iterator. */
sal_Bool SAL_CALL hasMoreElements() const SAL_THROW( () )
{ return nRemain != 0; }
/** Return the next element of the iterator. Calling this method if
hasMoreElements() has returned sal_False, is an error. Cast the
returned pointer to the
*/
::com::sun::star::uno::XInterface * SAL_CALL next() SAL_THROW( () );
/** Removes the current element (the last one returned by next())
from the underlying container. Calling this method before
next() has been called or calling it twice with no next()
inbetween is an error.
*/
void SAL_CALL remove() SAL_THROW( () );
private:
OInterfaceContainerHelper & rCont;
sal_Bool bIsList;
void * pData;
sal_Int32 nRemain;
OInterfaceIteratorHelper( const OInterfaceIteratorHelper & ) SAL_THROW( () );
OInterfaceIteratorHelper & operator = ( const OInterfaceIteratorHelper & ) SAL_THROW( () );
};
//===================================================================
/**
A container of interfaces. To access the elements use an iterator.
This implementation is thread save.
@see OInterfaceIteratorHelper
*/
class OInterfaceContainerHelper
{
public:
// these are here to force memory de/allocation to sal lib.
inline static void * SAL_CALL operator new( size_t nSize ) SAL_THROW( () )
{ return ::rtl_allocateMemory( nSize ); }
inline static void SAL_CALL operator delete( void * pMem ) SAL_THROW( () )
{ ::rtl_freeMemory( pMem ); }
inline static void * SAL_CALL operator new( size_t, void * pMem ) SAL_THROW( () )
{ return pMem; }
inline static void SAL_CALL operator delete( void *, void * ) SAL_THROW( () )
{}
/**
Create an interface container.
@param rMutex the mutex to protect multi thread access.
The lifetime must be longer than the lifetime
of this object.
*/
OInterfaceContainerHelper( ::osl::Mutex & rMutex ) SAL_THROW( () );
/**
Release all interfaces. All iterators must be destroyed before
the container is destructed.
*/
~OInterfaceContainerHelper() SAL_THROW( () );
/**
Return the number of Elements in the container. Only useful if you have acquired
the mutex.
*/
sal_Int32 SAL_CALL getLength() const SAL_THROW( () );
/**
Return all interfaces added to this container.
**/
::com::sun::star::uno::Sequence< ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > > SAL_CALL getElements() const SAL_THROW( () );
/** Inserts an element into the container. The position is not specified, thus it is not
specified in which order events are fired.
@attention
If you add the same interface more than once, then it will be added to the elements list
more than once and thus if you want to remove that interface from the list, you have to call
removeInterface() the same number of times.
In the latter case, you will also get events fired more than once (if the interface is a
listener interface).
@param rxIFace
interface to be added; it is allowed to insert null or
the same interface more than once
@return
the new count of elements in the container
*/
sal_Int32 SAL_CALL addInterface( const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > & rxIFace ) SAL_THROW( () );
/** Removes an element from the container. It uses interface equality to remove the interface.
@param rxIFace
interface to be removed
@return
the new count of elements in the container
*/
sal_Int32 SAL_CALL removeInterface( const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > & rxIFace ) SAL_THROW( () );
/**
Call disposing on all object in the container that
support XEventListener. Than clear the container.
*/
void SAL_CALL disposeAndClear( const ::com::sun::star::lang::EventObject & rEvt ) SAL_THROW( () );
/**
Clears the container without calling disposing().
*/
void SAL_CALL clear() SAL_THROW( () );
/** Executes a functor for each contained listener of specified type, e.g.
<code>forEach<awt::XPaintListener>(...</code>.
If a com::sun::star::lang::DisposedException occurs which relates to
the called listener, then that listener is removed from the container.
@tpl ListenerT listener type
@tpl FuncT unary functor type, let your compiler deduce this for you
@param func unary functor object expecting an argument of type
::com::sun::star::uno::Reference<ListenerT>
*/
template <typename ListenerT, typename FuncT>
inline void forEach( FuncT const& func );
/** Calls a UNO listener method for each contained listener.
The listener method must take a single argument of type EventT,
and return <code>void</code>.
If a com::sun::star::lang::DisposedException occurs which relates to
the called listener, then that listener is removed from the container.
@tpl ListenerT UNO event listener type, let your compiler deduce this for you
@tpl EventT event type, let your compiler deduce this for you
@param NotificationMethod
Pointer to a method of a ListenerT interface.
@param Event
Event to notify to all contained listeners
@example
<pre>
awt::PaintEvent aEvent( static_cast< ::cppu::OWeakObject* >( this ), ... );
listeners.notifyEach( &XPaintListener::windowPaint, aEvent );
</pre>
*/
template< typename ListenerT, typename EventT >
inline void notifyEach( void ( SAL_CALL ListenerT::*NotificationMethod )( const EventT& ), const EventT& Event );
private:
friend class OInterfaceIteratorHelper;
/**
bIsList == TRUE -> pData of type Sequence< XInterfaceSequence >,
otherwise pData == of type (XEventListener *)
*/
void * pData;
::osl::Mutex & rMutex;
/** TRUE -> used by an iterator. */
sal_Bool bInUse;
/** TRUE -> pData is of type Sequence< XInterfaceSequence >. */
sal_Bool bIsList;
OInterfaceContainerHelper( const OInterfaceContainerHelper & ) SAL_THROW( () );
OInterfaceContainerHelper & operator = ( const OInterfaceContainerHelper & ) SAL_THROW( () );
/*
Dulicate content of the conaitner and release the old one without destroying.
The mutex must be locked and the memberbInUse must be true.
*/
void copyAndResetInUse() SAL_THROW( () );
private:
template< typename ListenerT, typename EventT >
class NotifySingleListener
{
private:
typedef void ( SAL_CALL ListenerT::*NotificationMethod )( const EventT& );
NotificationMethod m_pMethod;
const EventT& m_rEvent;
public:
NotifySingleListener( NotificationMethod method, const EventT& event ) : m_pMethod( method ), m_rEvent( event ) { }
void operator()( const ::com::sun::star::uno::Reference<ListenerT>& listener ) const
{
(listener.get()->*m_pMethod)( m_rEvent );
}
};
};
template <typename ListenerT, typename FuncT>
inline void OInterfaceContainerHelper::forEach( FuncT const& func )
{
OInterfaceIteratorHelper iter( *this );
while (iter.hasMoreElements()) {
::com::sun::star::uno::Reference<ListenerT> const xListener(
iter.next(), ::com::sun::star::uno::UNO_QUERY );
if (xListener.is()) {
#if defined(EXCEPTIONS_OFF)
func( xListener );
#else
try {
func( xListener );
}
catch (::com::sun::star::lang::DisposedException const& exc) {
if (exc.Context == xListener)
iter.remove();
}
#endif
}
}
}
template< typename ListenerT, typename EventT >
inline void OInterfaceContainerHelper::notifyEach( void ( SAL_CALL ListenerT::*NotificationMethod )( const EventT& ), const EventT& Event )
{
forEach< ListenerT, NotifySingleListener< ListenerT, EventT > >( NotifySingleListener< ListenerT, EventT >( NotificationMethod, Event ) );
}
//===================================================================
/**
A helper class to store interface references of different types.
@see OInterfaceIteratorHelper
@see OInterfaceContainerHelper
*/
template< class key , class hashImpl , class equalImpl >
class OMultiTypeInterfaceContainerHelperVar
{
public:
// these are here to force memory de/allocation to sal lib.
inline static void * SAL_CALL operator new( size_t nSize ) SAL_THROW( () )
{ return ::rtl_allocateMemory( nSize ); }
inline static void SAL_CALL operator delete( void * pMem ) SAL_THROW( () )
{ ::rtl_freeMemory( pMem ); }
inline static void * SAL_CALL operator new( size_t, void * pMem ) SAL_THROW( () )
{ return pMem; }
inline static void SAL_CALL operator delete( void *, void * ) SAL_THROW( () )
{}
/**
Create a container of interface containers.
@param rMutex the mutex to protect multi thread access.
The lifetime must be longer than the lifetime
of this object.
*/
inline OMultiTypeInterfaceContainerHelperVar( ::osl::Mutex & ) SAL_THROW( () );
/**
Deletes all containers.
*/
inline ~OMultiTypeInterfaceContainerHelperVar() SAL_THROW( () );
/**
Return all id's under which at least one interface is added.
*/
inline ::com::sun::star::uno::Sequence< key > SAL_CALL getContainedTypes() const SAL_THROW( () );
/**
Return the container created under this key.
The InterfaceContainerHelper exists until the whole MultiTypeContainer is destroyed.
@return the container created under this key. If the container
was not created, null was returned.
*/
inline OInterfaceContainerHelper * SAL_CALL getContainer( const key & ) const SAL_THROW( () );
/** Inserts an element into the container with the specified key.
The position is not specified, thus it is not specified in which order events are fired.
@attention
If you add the same interface more than once, then it will be added to the elements list
more than once and thus if you want to remove that interface from the list, you have to call
removeInterface() the same number of times.
In the latter case, you will also get events fired more than once (if the interface is a
listener interface).
@param rKey
the id of the container
@param r
interface to be added; it is allowed, to insert null or
the same interface more than once
@return
the new count of elements in the container
*/
inline sal_Int32 SAL_CALL addInterface(
const key & rKey,
const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > & r )
SAL_THROW( () );
/** Removes an element from the container with the specified key.
It uses interface equality to remove the interface.
@param rKey
the id of the container
@param rxIFace
interface to be removed
@return
the new count of elements in the container
*/
inline sal_Int32 SAL_CALL removeInterface(
const key & rKey,
const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > & rxIFace )
SAL_THROW( () );
/**
Call disposing on all references in the container, that
support XEventListener. Then clears the container.
@param rEvt the event object which is passed during disposing() call
*/
inline void SAL_CALL disposeAndClear( const ::com::sun::star::lang::EventObject & rEvt ) SAL_THROW( () );
/**
Remove all elements of all containers. Does not delete the container.
*/
inline void SAL_CALL clear() SAL_THROW( () );
typedef key keyType;
private:
::std::hash_map< key , void* , hashImpl , equalImpl > *m_pMap;
::osl::Mutex & rMutex;
inline OMultiTypeInterfaceContainerHelperVar( const OMultiTypeInterfaceContainerHelperVar & ) SAL_THROW( () );
inline OMultiTypeInterfaceContainerHelperVar & operator = ( const OMultiTypeInterfaceContainerHelperVar & ) SAL_THROW( () );
};
/**
This struct contains the standard variables of a broadcaster. Helper
classes only know a reference to this struct instead of references
to the four members. The access to the members must be guarded with
rMutex.
The additional template parameter keyType has been added, because gcc
can't compile addListener( const container::keyType &key ).
*/
template < class container , class keyType >
struct OBroadcastHelperVar
{
/** The shared mutex. */
::osl::Mutex & rMutex;
/** ListenerContainer class is thread save. */
container aLC;
/** Dispose call ready. */
sal_Bool bDisposed;
/** In dispose call. */
sal_Bool bInDispose;
/**
Initialize the structur. bDispose and bInDispose are set to false.
@param rMutex the mutex reference.
*/
OBroadcastHelperVar( ::osl::Mutex & rMutex_ ) SAL_THROW( () )
: rMutex( rMutex_ )
, aLC( rMutex_ )
, bDisposed( sal_False )
, bInDispose( sal_False )
{}
/**
adds a listener threadsafe.
**/
inline void addListener(
const keyType &key,
const ::com::sun::star::uno::Reference < ::com::sun::star::uno::XInterface > &r )
SAL_THROW( () )
{
::osl::MutexGuard guard( rMutex );
OSL_ENSURE( !bInDispose, "do not add listeners in the dispose call" );
OSL_ENSURE( !bDisposed, "object is disposed" );
if( ! bInDispose && ! bDisposed )
aLC.addInterface( key , r );
}
/**
removes a listener threadsafe
**/
inline void removeListener(
const keyType &key,
const ::com::sun::star::uno::Reference < ::com::sun::star::uno::XInterface > & r )
SAL_THROW( () )
{
::osl::MutexGuard guard( rMutex );
OSL_ENSURE( !bDisposed, "object is disposed" );
if( ! bInDispose && ! bDisposed )
aLC.removeInterface( key , r );
}
/**
Return the container created under this key.
@return the container created under this key. If the container
was not created, null was returned. This can be used to optimize
performance ( construction of an event object can be avoided ).
***/
inline OInterfaceContainerHelper * SAL_CALL getContainer( const keyType &key ) const SAL_THROW( () )
{ return aLC.getContainer( key ); }
};
/*------------------------------------------
*
* In general, the above templates are used with a Type as key.
* Therefore a default declaration is given ( OMultiTypeInterfaceContainerHelper and OBroadcastHelper )
*
*------------------------------------------*/
// helper function call class
struct hashType_Impl
{
size_t operator()(const ::com::sun::star::uno::Type & s) const SAL_THROW( () )
{ return s.getTypeName().hashCode(); }
};
/** Specialized class for key type com::sun::star::uno::Type,
without explicit usage of STL symbols.
*/
class OMultiTypeInterfaceContainerHelper
{
public:
// these are here to force memory de/allocation to sal lib.
inline static void * SAL_CALL operator new( size_t nSize ) SAL_THROW( () )
{ return ::rtl_allocateMemory( nSize ); }
inline static void SAL_CALL operator delete( void * pMem ) SAL_THROW( () )
{ ::rtl_freeMemory( pMem ); }
inline static void * SAL_CALL operator new( size_t, void * pMem ) SAL_THROW( () )
{ return pMem; }
inline static void SAL_CALL operator delete( void *, void * ) SAL_THROW( () )
{}
/**
Create a container of interface containers.
@param rMutex the mutex to protect multi thread access.
The lifetime must be longer than the lifetime
of this object.
*/
OMultiTypeInterfaceContainerHelper( ::osl::Mutex & ) SAL_THROW( () );
/**
Delete all containers.
*/
~OMultiTypeInterfaceContainerHelper() SAL_THROW( () );
/**
Return all id's under which at least one interface is added.
*/
::com::sun::star::uno::Sequence< ::com::sun::star::uno::Type > SAL_CALL getContainedTypes() const SAL_THROW( () );
/**
Return the container created under this key.
@return the container created under this key. If the container
was not created, null was returned.
*/
OInterfaceContainerHelper * SAL_CALL getContainer( const ::com::sun::star::uno::Type & rKey ) const SAL_THROW( () );
/** Inserts an element into the container with the specified key.
The position is not specified, thus it is not specified in which order events are fired.
@attention
If you add the same interface more than once, then it will be added to the elements list
more than once and thus if you want to remove that interface from the list, you have to call
removeInterface() the same number of times.
In the latter case, you will also get events fired more than once (if the interface is a
listener interface).
@param rKey
the id of the container
@param r
interface to be added; it is allowed, to insert null or
the same interface more than once
@return
the new count of elements in the container
*/
sal_Int32 SAL_CALL addInterface(
const ::com::sun::star::uno::Type & rKey,
const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > & r )
SAL_THROW( () );
/** Removes an element from the container with the specified key.
It uses interface equality to remove the interface.
@param rKey
the id of the container
@param rxIFace
interface to be removed
@return
the new count of elements in the container
*/
sal_Int32 SAL_CALL removeInterface(
const ::com::sun::star::uno::Type & rKey,
const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > & rxIFace )
SAL_THROW( () );
/**
Call disposing on all object in the container that
support XEventListener. Than clear the container.
*/
void SAL_CALL disposeAndClear( const ::com::sun::star::lang::EventObject & rEvt ) SAL_THROW( () );
/**
Remove all elements of all containers. Does not delete the container.
*/
void SAL_CALL clear() SAL_THROW( () );
typedef ::com::sun::star::uno::Type keyType;
private:
void *m_pMap;
::osl::Mutex & rMutex;
inline OMultiTypeInterfaceContainerHelper( const OMultiTypeInterfaceContainerHelper & ) SAL_THROW( () );
inline OMultiTypeInterfaceContainerHelper & operator = ( const OMultiTypeInterfaceContainerHelper & ) SAL_THROW( () );
};
typedef OBroadcastHelperVar< OMultiTypeInterfaceContainerHelper , OMultiTypeInterfaceContainerHelper::keyType > OBroadcastHelper;
}
#endif
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