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156 lines
4.2 KiB
C++
156 lines
4.2 KiB
C++
//
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// StrategyCollection.h
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//
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// $Id: //poco/svn/Foundation/include/Poco/StrategyCollection.h#2 $
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//
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// Library: Foundation
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// Package: Cache
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// Module: StrategyCollection
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//
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// Definition of the StrategyCollection class.
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//
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// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Foundation_StrategyCollection_INCLUDED
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#define Foundation_StrategyCollection_INCLUDED
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#include "Poco/KeyValueArgs.h"
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#include "Poco/ValidArgs.h"
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#include "Poco/AbstractStrategy.h"
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#include "Poco/SharedPtr.h"
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#include <vector>
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namespace Poco {
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template <class TKey, class TValue>
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class StrategyCollection: public AbstractStrategy<TKey, TValue>
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/// An StrategyCollection is a decorator masking n collections as a single one
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{
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public:
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typedef std::vector<SharedPtr<AbstractStrategy<TKey, TValue> > > Strategies;
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typedef typename Strategies::iterator Iterator;
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typedef typename Strategies::const_iterator ConstIterator;
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public:
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StrategyCollection()
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{
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}
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~StrategyCollection()
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{
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}
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void pushBack(AbstractStrategy<TKey, TValue>* pStrat)
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/// Adds an AbstractStrategy to the collection. Class takes ownership of pointer
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{
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_strategies.push_back(SharedPtr<AbstractStrategy<TKey, TValue> >(pStrat));
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}
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void popBack()
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/// Removes the last added AbstractStrategy from the collection.
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{
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_strategies.pop_back();
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}
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void onAdd(const void* pSender, const KeyValueArgs <TKey, TValue>& key)
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/// Adds the key to the strategy.
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/// If for the key already an entry exists, it will be overwritten.
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{
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Iterator it = _strategies.begin();
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Iterator endIt = _strategies.end();
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for (; it != endIt; ++it)
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{
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(*it)->onAdd(pSender, key);
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}
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}
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void onRemove(const void* pSender, const TKey& key)
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/// Removes an entry from the strategy. If the entry is not found
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/// the remove is ignored.
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{
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Iterator it = _strategies.begin();
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Iterator endIt = _strategies.end();
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for (; it != endIt; ++it)
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{
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(*it)->onRemove(pSender, key);
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}
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}
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void onGet(const void* pSender, const TKey& key)
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{
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Iterator it = _strategies.begin();
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Iterator endIt = _strategies.end();
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for (; it != endIt; ++it)
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{
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(*it)->onGet(pSender, key);
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}
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}
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void onClear(const void* pSender, const EventArgs& args)
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{
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Iterator it = _strategies.begin();
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Iterator endIt = _strategies.end();
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for (; it != endIt; ++it)
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{
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(*it)->onClear(pSender, args);
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}
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}
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void onIsValid(const void* pSender, ValidArgs<TKey>& key)
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{
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Iterator it = _strategies.begin();
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Iterator endIt = _strategies.end();
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for (; it != endIt && key.isValid(); ++it)
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{
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(*it)->onIsValid(pSender, key);
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}
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}
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void onReplace(const void* pSender, std::set<TKey>& elemsToRemove)
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{
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Iterator it = _strategies.begin();
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Iterator endIt = _strategies.end();
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for (; it != endIt; ++it)
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{
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(*it)->onReplace(pSender, elemsToRemove);
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}
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}
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protected:
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Strategies _strategies;
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};
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} // namespace Poco
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#endif
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