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//
// PriorityStrategy.h
//
// Library: Foundation
// Package: Events
// Module: PrioritytStrategy
//
// Implementation of the DefaultStrategy template.
//
// Copyright (c) 2006-2011, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Foundation_PriorityStrategy_INCLUDED
#define Foundation_PriorityStrategy_INCLUDED
#include "Poco/NotificationStrategy.h"
#include "Poco/SharedPtr.h"
#include <vector>
namespace Poco {
template <class TArgs, class TDelegate>
class PriorityStrategy: public NotificationStrategy<TArgs, TDelegate>
/// NotificationStrategy for PriorityEvent.
///
/// Delegates are kept in a std::vector<>, ordered
/// by their priority.
{
public:
typedef TDelegate* DelegateHandle;
typedef SharedPtr<TDelegate> DelegatePtr;
typedef std::vector<DelegatePtr> Delegates;
typedef typename Delegates::iterator Iterator;
public:
PriorityStrategy()
{
}
PriorityStrategy(const PriorityStrategy& s):
_delegates(s._delegates)
{
}
~PriorityStrategy()
{
}
void notify(const void* sender, TArgs& arguments)
{
for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
{
(*it)->notify(sender, arguments);
}
}
DelegateHandle add(const TDelegate& delegate)
{
for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
{
if ((*it)->priority() > delegate.priority())
{
DelegatePtr pDelegate(static_cast<TDelegate*>(delegate.clone()));
_delegates.insert(it, pDelegate);
return pDelegate.get();
}
}
DelegatePtr pDelegate(static_cast<TDelegate*>(delegate.clone()));
_delegates.push_back(pDelegate);
return pDelegate.get();
}
void remove(const TDelegate& delegate)
{
for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
{
if (delegate.equals(**it))
{
(*it)->disable();
_delegates.erase(it);
return;
}
}
}
void remove(DelegateHandle delegateHandle)
{
for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
{
if (*it == delegateHandle)
{
(*it)->disable();
_delegates.erase(it);
return;
}
}
}
PriorityStrategy& operator = (const PriorityStrategy& s)
{
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();
}
protected:
Delegates _delegates;
};
template <class TDelegate>
class PriorityStrategy<void, TDelegate>
/// NotificationStrategy for PriorityEvent.
///
/// Delegates are kept in a std::vector<>, ordered
/// by their priority.
{
public:
typedef TDelegate* DelegateHandle;
typedef SharedPtr<TDelegate> DelegatePtr;
typedef std::vector<DelegatePtr> Delegates;
typedef typename Delegates::iterator Iterator;
public:
void notify(const void* sender)
{
for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
{
(*it)->notify(sender);
}
}
DelegateHandle add(const TDelegate& delegate)
{
for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
{
if ((*it)->priority() > delegate.priority())
{
DelegatePtr pDelegate(static_cast<TDelegate*>(delegate.clone()));
_delegates.insert(it, pDelegate);
return pDelegate.get();
}
}
DelegatePtr pDelegate(static_cast<TDelegate*>(delegate.clone()));
_delegates.push_back(pDelegate);
return pDelegate.get();
}
void remove(const TDelegate& delegate)
{
for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
{
if (delegate.equals(**it))
{
(*it)->disable();
_delegates.erase(it);
return;
}
}
}
void remove(DelegateHandle delegateHandle)
{
for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it)
{
if (*it == delegateHandle)
{
(*it)->disable();
_delegates.erase(it);
return;
}
}
}
PriorityStrategy& operator = (const PriorityStrategy& s)
{
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();
}
protected:
Delegates _delegates;
};
} // namespace Poco
#endif // Foundation_PriorityStrategy_INCLUDED
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