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AppFwk: Add a guarded interface pointer class

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Jacob Støren 2018-01-11 12:52:37 +01:00
parent ded9cc6708
commit 57b521c6d9
1 changed files with 86 additions and 0 deletions
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86
Fwk/AppFwk/cafProjectDataModel/cafPdmCore/cafPdmInterfacePointer.h Normal file
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//##################################################################################################
//
// Custom Visualization Core library
// Copyright (C) 2018 Ceetron Solutions AS
//
// This library may be used under the terms of either the GNU General Public License or
// the GNU Lesser General Public License as follows:
//
// GNU General Public License Usage
// This library 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 3 of the License, or
// (at your option) any later version.
//
// This library 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 at <<http://www.gnu.org/licenses/gpl.html>>
// for more details.
//
// GNU Lesser General Public License Usage
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 2.1 of the License, or
// (at your option) any later version.
//
// This library 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 Lesser General Public License at <<http://www.gnu.org/licenses/lgpl-2.1.html>>
// for more details.
//
//##################################################################################################
#pragma once
#include "cafPdmPointer.h"
namespace caf
{
template<class T>
class PdmInterfacePointer
{
public:
inline PdmInterfacePointer () : m_iface(nullptr) { }
inline PdmInterfacePointer ( T * iface ) { *this = iface; }
inline PdmInterfacePointer ( const PdmInterfacePointer<T> & other ) { *this = other.p();}
T* p() const
{
if ( m_implementingPdmObject.notNull() )
{
return m_iface;
}
else
{
return nullptr;
}
}
PdmInterfacePointer<T> & operator= ( T* iface )
{
m_implementingPdmObject = nullptr;
m_iface = nullptr;
if ( iface != nullptr )
{
m_implementingPdmObject = iface->implementingPdmObject();
m_iface = iface;
}
return *this;
}
bool isNull() const { return m_implementingPdmObject.isNull(); }
bool notNull() const { return m_implementingPdmObject.notNull(); }
operator T* () const { return p(); }
T* operator->() const { return p(); }
PdmInterfacePointer<T> & operator= ( const PdmInterfacePointer<T>& other ) { return *this = other.p();}
private:
T* m_iface;
PdmPointer<caf::PdmObjectHandle> m_implementingPdmObject;
};
}