poco/Foundation/include/Poco/DefaultStrategy.h

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//
// DefaultStrategy.h
//
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// $Id: //poco/1.4/Foundation/include/Poco/DefaultStrategy.h#3 $
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//
// Library: Foundation
// Package: Events
// Module: DefaultStrategy
//
// Implementation of the DefaultStrategy template.
//
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// Copyright (c) 2006-2011, Applied Informatics Software Engineering GmbH.
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// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
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#ifndef Foundation_DefaultStrategy_INCLUDED
#define Foundation_DefaultStrategy_INCLUDED
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#include "Poco/NotificationStrategy.h"
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#include "Poco/SharedPtr.h"
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#include <vector>
namespace Poco {
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template <class TArgs, class TDelegate>
class DefaultStrategy: public NotificationStrategy<TArgs, TDelegate>
/// Default notification strategy.
///
/// Internally, a std::vector<> is used to store
/// delegate objects. Delegates are invoked in the
/// order in which they have been registered.
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{
public:
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typedef SharedPtr<TDelegate> DelegatePtr;
typedef std::vector<DelegatePtr> Delegates;
typedef typename Delegates::iterator Iterator;
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public:
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DefaultStrategy()
{
}
DefaultStrategy(const DefaultStrategy& s):
_delegates(s._delegates)
{
}
~DefaultStrategy()
{
}
void notify(const void* sender, TArgs& arguments)
{
for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
{
(*it)->notify(sender, arguments);
}
}
void add(const TDelegate& delegate)
{
_delegates.push_back(DelegatePtr(static_cast<TDelegate*>(delegate.clone())));
}
void remove(const TDelegate& delegate)
{
for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
{
if (delegate.equals(**it))
{
(*it)->disable();
_delegates.erase(it);
return;
}
}
}
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DefaultStrategy& operator = (const DefaultStrategy& s)
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{
if (this != &s)
{
_delegates = s._delegates;
}
return *this;
}
void clear()
{
for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
{
(*it)->disable();
}
_delegates.clear();
}
bool empty() const
{
return _delegates.empty();
}
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protected:
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Delegates _delegates;
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};
} // namespace Poco
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#endif // Foundation_DefaultStrategy_INCLUDED