RelationalOperatorFilter.h

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 * Copyright (c) 2008-2010 Michael Schulze <mschulze@ivs.cs.uni-magdeburg.de>
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#ifndef __RelationalOperatorFilter_h__
#define __RelationalOperatorFilter_h__

#include "mw/attributes/filter/find.h"
#include "mw/attributes/tags/CompileTimeFilterTag.h"

namespace famouso {
    namespace mw {
        namespace attributes {
            namespace filter {


                template< typename A, typename B, typename op, typename tag=void>
                struct RelationalOperatorFilter {
                    typedef RelationalOperatorFilter type;
                    B   __b;
                    RelationalOperatorFilter (const B& t) : __b(t) {}

                    template< typename T>
                    bool operator () (const T& e) const {
                        A* a=filter::find<A>(e);
                        return !!(a && op::apply_runtime( a->getValue(), __b.getValue() ) );
                    }
                };


                template< typename A, typename B, typename op>
                struct RelationalOperatorFilter< A, B, op, tags::compile_time_filter_tag > {
                    typedef RelationalOperatorFilter type;
                    RelationalOperatorFilter (const B&) {}

                    template< typename T>
                    static bool apply(const T& e) {
                        A* a=filter::find<A>(e);
                        return !!(a && op::apply_runtime( a->getValue(), B::value ) );
                    }

                    template< typename T>
                    bool operator () (const T& e) const {
                        return apply(e);
                    }
                };

            } /* filter */
        } /* attributes */
    } /* mw */
} /* famouso */

#endif