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https://github.com/ClickHouse/ClickHouse.git
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208 lines
4.7 KiB
C++
208 lines
4.7 KiB
C++
//
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// DefaultStrategy.h
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//
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// Library: Foundation
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// Package: Events
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// Module: DefaultStrategy
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//
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// Implementation of the DefaultStrategy template.
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//
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// Copyright (c) 2006-2011, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_DefaultStrategy_INCLUDED
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#define Foundation_DefaultStrategy_INCLUDED
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#include <vector>
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#include "Poco/NotificationStrategy.h"
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#include "Poco/SharedPtr.h"
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namespace Poco
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{
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template <class TArgs, class TDelegate>
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class DefaultStrategy : public NotificationStrategy<TArgs, TDelegate>
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/// Default notification strategy.
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///
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/// Internally, a std::vector<> is used to store
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/// delegate objects. Delegates are invoked in the
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/// order in which they have been registered.
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{
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public:
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typedef TDelegate * DelegateHandle;
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typedef SharedPtr<TDelegate> DelegatePtr;
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typedef std::vector<DelegatePtr> Delegates;
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typedef typename Delegates::iterator Iterator;
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public:
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DefaultStrategy() { }
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DefaultStrategy(const DefaultStrategy & s) : _delegates(s._delegates) { }
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~DefaultStrategy() { }
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void notify(const void * sender, TArgs & arguments)
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{
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for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
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{
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(*it)->notify(sender, arguments);
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}
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}
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DelegateHandle add(const TDelegate & delegate)
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{
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DelegatePtr pDelegate(static_cast<TDelegate *>(delegate.clone()));
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_delegates.push_back(pDelegate);
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return pDelegate.get();
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}
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void remove(const TDelegate & delegate)
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{
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for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
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{
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if (delegate.equals(**it))
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{
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(*it)->disable();
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_delegates.erase(it);
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return;
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}
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}
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}
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void remove(DelegateHandle delegateHandle)
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{
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for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
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{
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if (*it == delegateHandle)
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{
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(*it)->disable();
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_delegates.erase(it);
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return;
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}
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}
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}
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DefaultStrategy & operator=(const DefaultStrategy & s)
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{
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if (this != &s)
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{
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_delegates = s._delegates;
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}
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return *this;
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}
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void clear()
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{
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for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
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{
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(*it)->disable();
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}
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_delegates.clear();
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}
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bool empty() const { return _delegates.empty(); }
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protected:
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Delegates _delegates;
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};
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template <class TDelegate>
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class DefaultStrategy<void, TDelegate> : public NotificationStrategy<void, TDelegate>
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/// Default notification strategy.
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///
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/// Internally, a std::vector<> is used to store
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/// delegate objects. Delegates are invoked in the
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/// order in which they have been registered.
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{
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public:
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typedef TDelegate * DelegateHandle;
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typedef SharedPtr<TDelegate> DelegatePtr;
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typedef std::vector<DelegatePtr> Delegates;
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typedef typename Delegates::iterator Iterator;
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public:
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DefaultStrategy() { }
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DefaultStrategy(const DefaultStrategy & s) : _delegates(s._delegates) { }
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~DefaultStrategy() { }
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void notify(const void * sender)
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{
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for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
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{
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(*it)->notify(sender);
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}
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}
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DelegateHandle add(const TDelegate & delegate)
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{
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DelegatePtr pDelegate(static_cast<TDelegate *>(delegate.clone()));
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_delegates.push_back(pDelegate);
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return pDelegate.get();
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}
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void remove(const TDelegate & delegate)
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{
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for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
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{
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if (delegate.equals(**it))
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{
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(*it)->disable();
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_delegates.erase(it);
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return;
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}
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}
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}
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void remove(DelegateHandle delegateHandle)
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{
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for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
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{
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if (*it == delegateHandle)
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{
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(*it)->disable();
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_delegates.erase(it);
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return;
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}
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}
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}
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DefaultStrategy & operator=(const DefaultStrategy & s)
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{
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if (this != &s)
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{
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_delegates = s._delegates;
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}
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return *this;
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}
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void clear()
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{
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for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
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{
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(*it)->disable();
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}
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_delegates.clear();
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}
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bool empty() const { return _delegates.empty(); }
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protected:
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Delegates _delegates;
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};
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} // namespace Poco
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#endif // Foundation_DefaultStrategy_INCLUDED
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