single_component_test_trial_integrand_functor.hpp

// Copyright (C) 2011-2012 by the BEM++ Authors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// THE SOFTWARE.

#ifndef fiber_single_component_test_trial_integrand_functor_hpp
#define fiber_single_component_test_trial_integrand_functor_hpp

#include "../common/common.hpp"

#include <cassert>
#include "collection_of_3d_arrays.hpp"
#include "geometrical_data.hpp"
#include "conjugate.hpp"
#include "scalar_traits.hpp"

namespace Fiber
{

template <typename BasisFunctionType_, typename ResultType_>
class SingleComponentTestTrialIntegrandFunctor
{
public:
    typedef BasisFunctionType_ BasisFunctionType;
    typedef ResultType_ ResultType;
    typedef typename ScalarTraits<ResultType>::RealType CoordinateType;

    SingleComponentTestTrialIntegrandFunctor(size_t testComponent,
                                             size_t trialComponent) :
        m_testComponent(testComponent), m_trialComponent(trialComponent)
    {
    }

    void addGeometricalDependencies(size_t& geomDeps) const {
        // do nothing
    }

    ResultType evaluate(
            const ConstGeometricalDataSlice<CoordinateType>& /* geomData */,
            const CollectionOf1dSlicesOfConst3dArrays<BasisFunctionType>& testValues,
            const CollectionOf1dSlicesOfConst3dArrays<BasisFunctionType>& trialValues) const {
        // Assert that there is at least one test and trial transformation
        // with correct dimensions
        assert(testValues.size() >= 1);
        assert(trialValues.size() >= 1);
        assert(testValues[0].extent(0) >= m_testComponent);
        assert(trialValues[0].extent(0) >= m_trialComponent);

        return conjugate(testValues[0](m_testComponent)) *
                trialValues[0](m_trialComponent);
    }

private:
    size_t m_testComponent, m_trialComponent;
};

} // namespace Fiber

#endif