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/***************************************************************************
* object.h
* This file is part of the KDE project
* copyright (C)2004-2006 by Sebastian Sauer (mail@dipe.org)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
***************************************************************************/
#ifndef KROSS_API_OBJECT_H
#define KROSS_API_OBJECT_H
#include <tqstring.h>
#include <tqvaluelist.h>
#include <tqmap.h>
#include <tqvariant.h>
//#include <tqobject.h>
#include <ksharedptr.h>
#include "../main/krossconfig.h"
namespace Kross { namespace Api {
// Forward declaration.
class List;
/**
* The common Object class all other object-classes are
* inheritated from.
*
* The Object class is used as base class to provide
* common functionality. It's similar to what we know
* in Python as PyObject or in TQt as TQObject.
*
* Inherited from e.g. \a Value, \a Module and \a Class .
*
* This class implementates reference counting for shared
* objects. So, no need to take care of freeing objects.
*/
class Object : public KShared
{
public:
/**
* Shared pointer to implement reference-counting.
*/
typedef KSharedPtr<Object> Ptr;
/**
* Constructor.
*/
explicit Object();
/**
* Destructor.
*/
virtual ~Object();
/**
* Return the class name. This could be something
* like "Kross::Api::Object" for this object. The
* value is mainly used for display purposes.
*
* \return The name of this class.
*/
virtual const TQString getClassName() const = 0;
/**
* \return a string representation of the object or
* it's content. This method is mainly used for
* debugging and testing purposes.
*/
virtual const TQString toString();
/**
* Pass a call to the object and evaluated it recursive
* down the object-hierachy. Objects like \a Class are able
* to handle call's by just implementing this function.
* If the call is done the \a called() method will be
* executed recursive from bottom up the call hierachy.
*
* \throws TypeException if the object or the name
* is not callable.
* \param name Each call has a name that says what
* should be called. In the case of a \a Class
* the name is the functionname.
* \param arguments The list of arguments passed to
* the call.
* \return The call-result as \a Object::Ptr instance or
* NULL if the call has no result.
*/
virtual Object::Ptr call(const TQString& name, KSharedPtr<List> arguments);
/**
* Return a list of supported callable objects.
*
* \return List of supported calls.
*/
virtual TQStringList getCalls() { return TQStringList(); }
//FIXME replace function with getChildren() functionality ?
/**
* Try to convert the \a Object instance to the
* template class T.
*
* \throw TypeException if the cast failed.
* \param object The Object to cast.
* \return The to a instance from template type T
* casted Object.
*/
template<class T> static T* fromObject(Object::Ptr object);
/**
* This method got used by the \a ProxyFunction classes
* to translate an unknown \p TYPE to a \a Object instance.
* Classes like \a Value or \a ListT or \a Class are
* overwriting this method to transparently translate these
* passed type while this method just assumes that the
* type is already a \a Object instance.
*/
template<typename TYPE>
static Object::Ptr toObject(TYPE t) { return t; }
};
}}
#include "exception.h"
namespace Kross { namespace Api {
template<class T> inline T* Object::fromObject(Object::Ptr object)
{
T* t = (T*) object.data();
if(! t)
throw KSharedPtr<Exception>( new Exception(TQString("Object \"%1\" invalid.").tqarg(object ? object->getClassName() : "")) );
return t;
}
}}
#endif
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