mirror of https://github.com/Icinga/icinga2.git
130 lines
3.8 KiB
C++
130 lines
3.8 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#ifndef OBJECTSET_H
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#define OBJECTSET_H
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namespace icinga
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{
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template<typename TValue>
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class ObjectSet : public Object
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{
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public:
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typedef shared_ptr<ObjectSet<TValue> > Ptr;
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typedef weak_ptr<ObjectSet<TValue> > WeakPtr;
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typedef typename set<TValue>::iterator Iterator;
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ObjectSet(void)
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: m_Parent(), m_Predicate()
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{ }
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ObjectSet(const typename ObjectSet<TValue>::Ptr& parent, function<bool(const TValue&)> predicate)
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: m_Parent(parent), m_Predicate(predicate)
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{ }
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void Start(void)
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{
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if (m_Parent) {
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m_Parent->OnObjectAdded.connect(boost::bind(&ObjectSet::ObjectAddedOrCommittedHandler, this, _2));
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m_Parent->OnObjectCommitted.connect(boost::bind(&ObjectSet::ObjectAddedOrCommittedHandler, this, _2));
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m_Parent->OnObjectRemoved.connect(boost::bind(&ObjectSet::ObjectRemovedHandler, this, _2));
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for (ObjectSet::Iterator it = m_Parent->Begin(); it != m_Parent->End(); it++)
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CheckObject(*it);
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}
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}
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void AddObject(const TValue& object)
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{
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m_Objects.insert(object);
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OnObjectAdded(GetSelf(), object);
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}
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void RemoveObject(const TValue& object)
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{
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ObjectSet::Iterator it = m_Objects.find(object);
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if (it != m_Objects.end()) {
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m_Objects.erase(it);
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OnObjectRemoved(GetSelf(), object);
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}
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}
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bool Contains(const TValue& object) const
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{
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return !(m_Objects.find(object) == m_Objects.end());
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}
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void CheckObject(const TValue& object)
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{
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if (m_Predicate && !m_Predicate(object)) {
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RemoveObject(object);
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} else {
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if (!Contains(object)) {
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AddObject(object);
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} else {
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OnObjectCommitted(GetSelf(), object);
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}
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}
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}
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boost::signal<void (const typename ObjectSet<TValue>::Ptr&, const TValue&)> OnObjectAdded;
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boost::signal<void (const typename ObjectSet<TValue>::Ptr&, const TValue&)> OnObjectCommitted;
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boost::signal<void (const typename ObjectSet<TValue>::Ptr&, const TValue&)> OnObjectRemoved;
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Iterator Begin(void)
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{
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return m_Objects.begin();
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}
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Iterator End(void)
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{
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return m_Objects.end();
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}
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void ForeachObject(function<void (const typename Object::Ptr&, const TValue&)> callback)
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{
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for (Iterator it = Begin(); it != End(); it++) {
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callback(GetSelf(), *it);
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}
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}
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private:
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set<TValue> m_Objects;
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typename ObjectSet<TValue>::Ptr m_Parent;
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function<bool (const TValue&)> m_Predicate;
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void ObjectAddedOrCommittedHandler(const TValue& object)
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{
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CheckObject(object);
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}
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void ObjectRemovedHandler(const TValue& object)
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{
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RemoveObject(object);
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}
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};
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}
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#endif /* OBJECTSET_H */
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