/usr/include/CLAM/Polymorphic.hxx is in libclam-dev 1.4.0-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG)
* UNIVERSITAT POMPEU FABRA
*
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef _Polymorphic_hxx_
#define _Polymorphic_hxx_
#include "Component.hxx"
#include "XMLStorage.hxx"
#include "XMLAdapter.hxx"
#include <string>
// TODO
// Memory management
// Pointer, Reference or Get interface?
// DT required interface
// Change Dummys
// Adopt function
namespace CLAM
{
/**
* This class is an utility class to hold polymorphic pointers as attributes
* on DynamicTypes and simplify the problem of the XML Loading
* of abstract XML Schema types.
* - This class holds the property of the object, this means that
* the destructor will destroy it.
* - You can adopt the pointer property but the Polymorphic object will
* loose the reference to the object.
* @experimental This is a draft
*/
template <typename FactoryType>
class Polymorphic : public Component
{
public:
typedef FactoryType Factory;
typedef typename Factory::AbstractProduct Abstract;
private:
Abstract * mAdaptee;
public:
Polymorphic()
{
mAdaptee = 0;
}
Polymorphic(const std::string & concreteClassName)
{
mAdaptee = Factory::GetInstance().Create(concreteClassName);
}
Polymorphic(Abstract & toCopy)
{
mAdaptee = & toCopy;
}
~Polymorphic()
{
if (mAdaptee) delete mAdaptee;
}
Polymorphic & operator=(Abstract & toCopy)
{
mAdaptee = & toCopy;
}
Abstract & Get()
{
CLAM_ASSERT(mAdaptee, "Derreferencing a null polymorph pointer");
return *mAdaptee;
}
const Abstract & Get() const
{
CLAM_ASSERT(mAdaptee, "Derreferencing a null polymorph pointer");
return *mAdaptee;
}
void Set(Abstract * pointee)
{
mAdaptee = pointee;
}
const char * GetClassName() const
{
return "Polymorphic";
}
operator Abstract&()
{
return *mAdaptee;
}
operator Abstract* ()
{
return mAdaptee;
}
operator const Abstract&() const
{
return *mAdaptee;
}
void StoreOn(Storage & storage) const
{
// TODO case nill
std::string className = mAdaptee->GetClassName();
XMLAdapter<std::string> typeAttribute(className, "type", false);
storage.Store(typeAttribute);
mAdaptee->StoreOn(storage);
}
void LoadFrom(Storage & storage)
{
// TODO case nill
// TODO case incorrect type
// TODO case mAdaptee!=null
std::string className;
XMLAdapter<std::string> typeAttribute(className, "type", false);
storage.Load(typeAttribute);
mAdaptee = Factory::GetInstance().Create(className);
mAdaptee->LoadFrom(storage);
}
};
}
#endif//_Polymorphic_hxx_
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