icinga2/lib/base/dynamictype.hpp

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/******************************************************************************
* Icinga 2 *
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* Copyright (C) 2012-2015 Icinga Development Team (http://www.icinga.org) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#ifndef DYNAMICTYPE_H
#define DYNAMICTYPE_H
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#include "base/i2-base.hpp"
#include "base/dynamicobject.hpp"
#include "base/objectlock.hpp"
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#include <map>
# include <boost/iterator/iterator_facade.hpp>
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namespace icinga
{
template<typename T>
class DynamicTypeIterator;
class I2_BASE_API DynamicType : public Object
{
public:
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DECLARE_PTR_TYPEDEFS(DynamicType);
DynamicType(const String& name);
String GetName(void) const;
static DynamicType::Ptr GetByName(const String& name);
DynamicObject::Ptr GetObject(const String& name) const;
void RegisterObject(const DynamicObject::Ptr& object);
static std::vector<DynamicType::Ptr> GetTypes(void);
std::pair<DynamicTypeIterator<DynamicObject>, DynamicTypeIterator<DynamicObject> > GetObjects(void);
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template<typename T>
static std::pair<DynamicTypeIterator<T>, DynamicTypeIterator<T> > GetObjectsByType(void)
{
DynamicType::Ptr type = GetByName(T::GetTypeName());
return std::make_pair(
DynamicTypeIterator<T>(type, 0),
DynamicTypeIterator<T>(type, UINT_MAX)
);
}
private:
template<typename T> friend class DynamicTypeIterator;
String m_Name;
typedef std::map<String, DynamicObject::Ptr> ObjectMap;
typedef std::vector<DynamicObject::Ptr> ObjectVector;
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ObjectMap m_ObjectMap;
ObjectVector m_ObjectVector;
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typedef std::map<String, DynamicType::Ptr> TypeMap;
typedef std::vector<DynamicType::Ptr> TypeVector;
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static TypeMap& InternalGetTypeMap(void);
static TypeVector& InternalGetTypeVector(void);
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static boost::mutex& GetStaticMutex(void);
};
template<typename T>
class DynamicTypeIterator : public boost::iterator_facade<DynamicTypeIterator<T>, const intrusive_ptr<T>, boost::forward_traversal_tag>
{
public:
DynamicTypeIterator(const DynamicType::Ptr& type, int index)
: m_Type(type), m_Index(index)
{ }
private:
friend class boost::iterator_core_access;
DynamicType::Ptr m_Type;
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DynamicType::ObjectVector::size_type m_Index;
mutable intrusive_ptr<T> m_Current;
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void increment(void)
{
m_Index++;
}
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void decrement(void)
{
m_Index--;
}
void advance(int n)
{
m_Index += n;
}
bool equal(const DynamicTypeIterator<T>& other) const
{
ASSERT(other.m_Type == m_Type);
{
ObjectLock olock(m_Type);
if ((other.m_Index == UINT_MAX || other.m_Index >= other.m_Type->m_ObjectVector.size()) &&
(m_Index == UINT_MAX || m_Index >= m_Type->m_ObjectVector.size()))
return true;
}
return (other.m_Index == m_Index);
}
const intrusive_ptr<T>& dereference(void) const
{
ObjectLock olock(m_Type);
m_Current = static_pointer_cast<T>(*(m_Type->m_ObjectVector.begin() + m_Index));
return m_Current;
}
};
}
#endif /* DYNAMICTYPE_H */