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#ifndef _MINIMIZER_H_
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#define _MINIMIZER_H_
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#include "MinimizerBase.hpp"
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#include "Minimizer1D.hpp"
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typedef enum {GoldenSection, Brent} LineSearchStrategy;
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class Minimizer : public MinimizerBase{
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public:
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Minimizer(MinimizerParameterSet* param) : paramSet(param), outputFunc(NULL) {}
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virtual void printMinizerInfo() = 0;
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void init() {}
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void setOutputFunctor(OutputFunctor* functor) {outputFunc = functor;}
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virtual void writeOut(vector<double>& x, int iter){
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if (outputFunc !=NULL)
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(*outputFunc)(x, iter);
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}
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void setMinX(vector<double>& x) { minX = x;}
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vector<double> getMinX() { return minX;}
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void setPrevMinX(vector<double>& x) { prevMinX = x;}
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vector<double> getPrevMinX() {return prevMinX;}
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int getCurrentIteration() {return currentIter;}
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protected:
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MinimizerParameterSet* paramSet;
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OutputFunctor* outputFunc;
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int currentIter;
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// Coordinates yielding the minimum value of the function.
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vector<double> minX;
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// Vector holding the previous point.
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vector<double> prevMinX;
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};
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class MinimizerUsingLineSearch : public Minimizer{
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public:
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MinimizerUsingLineSearch(MinimizerParameterSet* param) : Minimizer(param), lineSearchInit(false){}
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void setLineSearchStrategy(NLModel* nlp, LineSearchStrategy stategy){
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if(stategy == GoldenSection)
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lsMinimizer = new GoldenSectionMinimizer(nlp);
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else if(stategy == Brent)
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lsMinimizer = new BrentMinimizer(nlp);
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else{
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cerr << "MinimizerUsingLineSearch Error : Unknown Line Search Strategy" << endl;
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exit(-1);
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}
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lsMinimizer->setMaxIteration(paramSet->getLineSearchMaxIteration());
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lsMinimizer->setStepTol(paramSet->getLineSearchTol());
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lineSearchInit = true;
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}
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protected:
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Minimizer1D* lsMinimizer;
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bool lineSearchInit;
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};
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#endif
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