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Diffstat (limited to 'comphelper/inc/comphelper/componentbase.hxx')
| -rw-r--r-- | comphelper/inc/comphelper/componentbase.hxx | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/comphelper/inc/comphelper/componentbase.hxx b/comphelper/inc/comphelper/componentbase.hxx new file mode 100644 index 000000000000..12d5fdb64355 --- /dev/null +++ b/comphelper/inc/comphelper/componentbase.hxx @@ -0,0 +1,161 @@ +/************************************************************************* + * 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 COMPHELPER_COMPONENTBASE_HXX +#define COMPHELPER_COMPONENTBASE_HXX + +#include "comphelper/comphelperdllapi.h" + +/** === begin UNO includes === **/ +/** === end UNO includes === **/ + +#include <cppuhelper/interfacecontainer.hxx> + +//........................................................................ +namespace comphelper +{ +//........................................................................ + + //==================================================================== + //= ComponentBase + //==================================================================== + class COMPHELPER_DLLPUBLIC ComponentBase + { + protected: + /** creates a ComponentBase instance + + The instance is not initialized. As a consequence, every ComponentMethodGuard instantiated for + this component will throw a <type scope="com::sun::star::lang">NotInitializedException</type>, + until ->setInitialized() is called. + */ + ComponentBase( ::cppu::OBroadcastHelper& _rBHelper ) + :m_rBHelper( _rBHelper ) + ,m_bInitialized( false ) + { + } + + struct NoInitializationNeeded { }; + + /** creates a ComponentBase instance + + The instance is already initialized, so there's no need to call setInitialized later on. Use this + constructor for component implementations which do not require explicit initialization. + */ + ComponentBase( ::cppu::OBroadcastHelper& _rBHelper, NoInitializationNeeded ) + :m_rBHelper( _rBHelper ) + ,m_bInitialized( true ) + { + } + + /** marks the instance as initialized + + Subsequent instantiations of a ComponentMethodGuard won't throw the NotInitializedException now. + */ + inline void setInitialized() { m_bInitialized = true; } + + public: + /// helper struct to grant access to selected public methods to the ComponentMethodGuard class + struct GuardAccess { friend class ComponentMethodGuard; private: GuardAccess() { } }; + + /// retrieves the component's mutex + inline ::osl::Mutex& getMutex( GuardAccess ) { return getMutex(); } + /// checks whether the component is already disposed, throws a DisposedException if so. + inline void checkDisposed( GuardAccess ) const { impl_checkDisposed_throw(); } + /// checks whether the component is already initialized, throws a NotInitializedException if not. + inline void checkInitialized( GuardAccess ) const { impl_checkInitialized_throw(); } + + protected: + /// retrieves the component's broadcast helper + inline ::cppu::OBroadcastHelper& getBroadcastHelper() { return m_rBHelper; } + /// retrieves the component's mutex + inline ::osl::Mutex& getMutex() { return m_rBHelper.rMutex; } + /// determines whether the instance is already disposed + inline bool impl_isDisposed() const { return m_rBHelper.bDisposed; } + + /// checks whether the component is already disposed. Throws a DisposedException if so. + void impl_checkDisposed_throw() const; + + /// checks whether the component is already initialized. Throws a NotInitializedException if not. + void impl_checkInitialized_throw() const; + + /// determines whether the component is already initialized + inline bool + impl_isInitialized_nothrow() const { return m_bInitialized; } + + /** returns the context to be used when throwing exceptions + + The default implementation returns <NULL/>. + */ + virtual ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > + getComponent() const; + + private: + ::cppu::OBroadcastHelper& m_rBHelper; + bool m_bInitialized; + }; + + class ComponentMethodGuard + { + public: + enum MethodType + { + /// allow the method to be called only when being initialized and not being disposed + Default, + /// allow the method to be called without being initialized + WithoutInit + + }; + + ComponentMethodGuard( ComponentBase& _rComponent, const MethodType _eType = Default ) + :m_aMutexGuard( _rComponent.getMutex( ComponentBase::GuardAccess() ) ) + { + if ( _eType != WithoutInit ) + _rComponent.checkInitialized( ComponentBase::GuardAccess() ); + _rComponent.checkDisposed( ComponentBase::GuardAccess() ); + } + + ~ComponentMethodGuard() + { + } + + inline void clear() + { + m_aMutexGuard.clear(); + } + inline void reset() + { + m_aMutexGuard.reset(); + } + + private: + ::osl::ResettableMutexGuard m_aMutexGuard; + }; + +//........................................................................ +} // namespace ComponentBase +//........................................................................ + +#endif // COMPHELPER_COMPONENTBASE_HXX |