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RTOpPack_ROpGetElement.hpp
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00042 
00043 #ifndef RTOPPACK_ROP_GET_ELEMENT_HPP
00044 #define RTOPPACK_ROP_GET_ELEMENT_HPP
00045 
00046 #include "RTOpPack_RTOpTHelpers.hpp"
00047 
00048 
00049 namespace RTOpPack {
00050 
00051 
00053 template<class Scalar>
00054 class ROpGetElementEleWiseReductionOp {
00055 public:
00057   ROpGetElementEleWiseReductionOp(const Ordinal &global_i_in = -1)
00058     :global_i_(global_i_in)
00059     {}
00061   Ordinal global_i() const
00062     {
00063       return global_i_;
00064     }
00066   void operator()(const index_type i, const Scalar &v0, Scalar &reduct) const
00067     {
00068       if (i == global_i_) {
00069         reduct = v0;
00070       }
00071     }
00072 private:
00073   Ordinal global_i_;
00074 };
00075 
00076 
00081 template<class Scalar>
00082 class ROpGetElement
00083   : public ROp_1_CoordVariantScalarReduction<
00084         Scalar,
00085         Scalar,
00086         ROpGetElementEleWiseReductionOp<Scalar>
00087       >
00088 {
00089 public:
00091   ROpGetElement(const Ordinal &global_i)
00092     {
00093       this->setOpNameBase("ROpGetElement");
00094       this->initialize(global_i);
00095       this->initReductObjValue(ScalarTraits<Scalar>::zero());
00096     }
00098   void initialize(const Ordinal &global_i)
00099     { 
00100       this->setEleWiseReduction(ROpGetElementEleWiseReductionOp<Scalar>(global_i));
00101     }
00103   Scalar operator()(const ReductTarget& reduct_obj ) const
00104     {
00105       return this->getRawVal(reduct_obj);
00106     }
00107 protected:
00109   virtual Range1D range_impl() const
00110     {
00111       const Ordinal i = this->getEleWiseReduction().global_i();
00112       return Range1D(i, i);
00113     }
00114 
00115 };
00116 
00117 
00118 } // namespace RTOpPack
00119 
00120 
00121 #endif // RTOPPACK_ROP_GET_ELEMENT_HPP
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