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Diffstat (limited to 'include/comphelper/IdPropArrayHelper.hxx')
-rw-r--r-- | include/comphelper/IdPropArrayHelper.hxx | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/include/comphelper/IdPropArrayHelper.hxx b/include/comphelper/IdPropArrayHelper.hxx new file mode 100644 index 000000000000..497a39fd500d --- /dev/null +++ b/include/comphelper/IdPropArrayHelper.hxx @@ -0,0 +1,117 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ +#ifndef COMPHELPER_IDPROPERTYARRAYUSAGEHELPER_HXX +#define COMPHELPER_IDPROPERTYARRAYUSAGEHELPER_HXX + +#include <cppuhelper/component.hxx> +#include <osl/mutex.hxx> +#include <cppuhelper/interfacecontainer.hxx> +#include <osl/diagnose.h> +#include <comphelper/stl_types.hxx> +#include <rtl/instance.hxx> +#include <cppuhelper/propshlp.hxx> + +namespace cppu { class IPropertyArrayHelper; } + +namespace comphelper +{ + //************************************************************ + // OIdPropertyArrayUsageHelper + //************************************************************ + template <typename TYPE> struct OIdPropertyArrayUsageHelperMutex + : public rtl::Static< ::osl::Mutex, OIdPropertyArrayUsageHelperMutex<TYPE> > {}; + + typedef std::map< sal_Int32, ::cppu::IPropertyArrayHelper*, std::less< sal_Int32 > > OIdPropertyArrayMap; + template <class TYPE> + class OIdPropertyArrayUsageHelper + { + protected: + static sal_Int32 s_nRefCount; + static OIdPropertyArrayMap* s_pMap; + + public: + OIdPropertyArrayUsageHelper(); + virtual ~OIdPropertyArrayUsageHelper() + { + ::osl::MutexGuard aGuard(OIdPropertyArrayUsageHelperMutex<TYPE>::get()); + OSL_ENSURE(s_nRefCount > 0, "OIdPropertyArrayUsageHelper::~OIdPropertyArrayUsageHelper : suspicious call : have a refcount of 0 !"); + if (!--s_nRefCount) + { + // delete the element + for (OIdPropertyArrayMap::iterator i = s_pMap->begin(); i != s_pMap->end(); ++i) + delete (*i).second; + delete s_pMap; + s_pMap = NULL; + } + } + + /** call this in the getInfoHelper method of your derived class. The method returns the array helper of the + class, which is created if neccessary. + */ + ::cppu::IPropertyArrayHelper* getArrayHelper(sal_Int32 nId); + + protected: + /** used to implement the creation of the array helper which is shared amongst all instances of the class. + This method needs to be implemented in derived classes. + <BR> + The method gets called with Mutex acquired. + <BR> + as long as IPropertyArrayHelper has no virtual destructor, the implementation of ~OPropertyArrayUsageHelper + assumes that you created an ::cppu::OPropertyArrayHelper when deleting s_pProps. + @return an pointer to the newly created array helper. Must not be NULL. + */ + virtual ::cppu::IPropertyArrayHelper* createArrayHelper(sal_Int32 nId) const = 0; + }; + + //------------------------------------------------------------------ + template<class TYPE> + sal_Int32 OIdPropertyArrayUsageHelper< TYPE >::s_nRefCount = 0; + + template<class TYPE> + OIdPropertyArrayMap* OIdPropertyArrayUsageHelper< TYPE >::s_pMap = NULL; + + //------------------------------------------------------------------ + template <class TYPE> + OIdPropertyArrayUsageHelper<TYPE>::OIdPropertyArrayUsageHelper() + { + ::osl::MutexGuard aGuard(OIdPropertyArrayUsageHelperMutex<TYPE>::get()); + // create the map if necessary + if (s_pMap == NULL) + s_pMap = new OIdPropertyArrayMap(); + ++s_nRefCount; + } + + //------------------------------------------------------------------ + template <class TYPE> + ::cppu::IPropertyArrayHelper* OIdPropertyArrayUsageHelper<TYPE>::getArrayHelper(sal_Int32 nId) + { + OSL_ENSURE(s_nRefCount, "OIdPropertyArrayUsageHelper::getArrayHelper : suspicious call : have a refcount of 0 !"); + ::osl::MutexGuard aGuard(OIdPropertyArrayUsageHelperMutex<TYPE>::get()); + // do we have the array already? + if (! (*s_pMap)[nId] ) + { + (*s_pMap)[nId] = createArrayHelper(nId); + OSL_ENSURE((*s_pMap)[nId], "OIdPropertyArrayUsageHelper::getArrayHelper : createArrayHelper returned nonsense !"); + } + return (*s_pMap)[nId]; + } +} +#endif // COMPHELPER_IDPROPERTYARRAYUSAGEHELPER_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |