envelopefilter.hpp

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#ifndef _Wolframe_FILTER_ENVELOPE_FILTER_INTERFACE_HPP_INCLUDED
#define _Wolframe_FILTER_ENVELOPE_FILTER_INTERFACE_HPP_INCLUDED
#include "filter/typedfilter.hpp"
#include <boost/shared_ptr.hpp>

namespace _Wolframe {
namespace langbind {

template <class Context>
class EnvelopeInputFilter
        :public TypedInputFilter
{
public:
        typedef boost::shared_ptr<Context> ContextR;

        EnvelopeInputFilter( const TypedInputFilterR& i, const ContextR& c)
                :TypedInputFilter(i->name())
                ,m_context(c)
                ,m_input(i){}

        EnvelopeInputFilter( const EnvelopeInputFilter& o)
                :TypedInputFilter(o)
                ,m_context(o.m_context)
                ,m_input(o.m_input){}

        virtual ~EnvelopeInputFilter()
        {
                m_input.reset();
        }

        virtual TypedInputFilter* copy() const
        {
                return new EnvelopeInputFilter(*this);
        }

        virtual bool getNext( ElementType& type, types::VariantConst& element)
        {
                return m_input->getNext( type, element);
        }

        virtual void resetIterator()
        {
                m_input->resetIterator();
        }

        virtual bool setFlags( Flags f)
        {
                if (m_input->setFlags(f))
                {
                        return TypedInputFilter::setFlags(f);
                }
                return false;
        }

        virtual bool checkSetFlags( Flags f) const
        {
                return m_input->checkSetFlags(f);
        }

        virtual const char* getError() const
        {
                return m_input->getError();
        }

private:
        boost::shared_ptr<Context> m_context;
        TypedInputFilterR m_input;
};

}}//namespace
#endif