not-filter.h

#ifndef _TelepathyQt4_not_filter_h_HEADER_GUARD_
#define _TelepathyQt4_not_filter_h_HEADER_GUARD_

#ifndef IN_TELEPATHY_QT4_HEADER
#error IN_TELEPATHY_QT4_HEADER
#endif

#include <TelepathyQt4/Filter>
#include <TelepathyQt4/Types>

namespace Tp
{

template <class T>
class NotFilter : public Filter<T>
{
public:
    static SharedPtr<NotFilter<T> > create(
            const SharedPtr<const Filter<T> > &filter = SharedPtr<const Filter<T> >())
    {
        return SharedPtr<NotFilter<T> >(new NotFilter<T>(filter));
    }

    inline virtual ~NotFilter() { }

    inline virtual bool isValid() const
    {
        return mFilter && mFilter->isValid();
    }

    inline virtual bool matches(const SharedPtr<T> &t) const
    {
        if (!isValid()) {
            return false;
        }

        return !mFilter->matches(t);
    }

    inline SharedPtr<const Filter<T> > filter() const { return mFilter; }

private:
    NotFilter(const SharedPtr<const Filter<T> > &filter)
        : Filter<T>(), mFilter(filter) { }

    SharedPtr<const Filter<T> > mFilter;
};

} // Tp

#endif