ChebyshevExpander.h

/* Copyright 2016 Kristofer Björnson
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef COM_DAFER45_TBTK_C_PROPERTY_EXTRACTOR
#define COM_DAFER45_TBTK_C_PROPERTY_EXTRACTOR

#include "TBTK/Solver/ChebyshevExpander.h"
#include "TBTK/Property/Density.h"
#include "TBTK/Property/GreensFunction.h"
#include "TBTK/Property/LDOS.h"
#include "TBTK/Property/Magnetization.h"
#include "TBTK/Property/SpinPolarizedLDOS.h"
#include "TBTK/PropertyExtractor/PropertyExtractor.h"

//#include <initializer_list>
#include <iostream>

namespace TBTK{
namespace PropertyExtractor{

class ChebyshevExpander : public PropertyExtractor{
public:
    ChebyshevExpander(Solver::ChebyshevExpander &cSolver);

    virtual ~ChebyshevExpander();

    virtual void setEnergyWindow(
        double lowerBound,
        double upperBound,
        int energyResolution
    );

    Property::GreensFunction calculateGreensFunction(
        Index to,
        Index from,
        Property::GreensFunction::Type type = Property::GreensFunction::Type::Retarded
    );

    Property::GreensFunction calculateGreensFunction(
        std::vector<std::vector<Index>> patterns,
        Property::GreensFunction::Type type = Property::GreensFunction::Type::Retarded
    );

    Property::GreensFunction calculateGreensFunctions(
        std::vector<Index> &to,
        Index from,
        Property::GreensFunction::Type type = Property::GreensFunction::Type::Retarded
    );

    virtual std::complex<double> calculateExpectationValue(
        Index to,
        Index from
    );

    virtual Property::Density calculateDensity(
        Index pattern,
        Index ranges
    );

    virtual Property::Density calculateDensity(
        std::vector<Index> patterns
    );

    virtual Property::Magnetization calculateMagnetization(
        Index pattern,
        Index ranges
    );

    virtual Property::Magnetization calculateMagnetization(
        std::vector<Index> patterns
    );

    virtual Property::LDOS calculateLDOS(Index pattern, Index ranges);

    virtual Property::LDOS calculateLDOS(
        std::vector<Index> patterns
    );

    virtual Property::SpinPolarizedLDOS calculateSpinPolarizedLDOS(
        Index pattern,
        Index ranges
    );

    virtual Property::SpinPolarizedLDOS calculateSpinPolarizedLDOS(
        std::vector<Index> patterns
    );
private:
    Solver::ChebyshevExpander *cSolver;

    virtual const Solver::Solver& getSolver() const;

    static void calculateDensityCallback(
        PropertyExtractor *cb_this,
        Property::Property &property,
        const Index &index,
        int offset,
        Information &information
    );

    static void calculateMAGCallback(
        PropertyExtractor *cb_this,
        Property::Property &property,
        const Index &index,
        int offset,
        Information &information
    );

    static void calculateLDOSCallback(
        PropertyExtractor *cb_this,
        Property::Property &property,
        const Index &index,
        int offset,
        Information &information
    );

    static void calculateSP_LDOSCallback(
        PropertyExtractor *cb_this,
        Property::Property &property,
        const Index &index,
        int offset,
        Information &information
    );
};

inline const Solver::Solver& ChebyshevExpander::getSolver() const{
    return *cSolver;
}

};  //End of namespace PropertyExtractor
};  //End of namespace TBTK

#endif