// ---------------------------------------------------------------------------
//
//  This file is part of PermLib.
//
// Copyright (c) 2009-2011 Thomas Rehn <thomas@carmen76.de>
// All rights reserved.
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// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
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// 1. Redistributions of source code must retain the above copyright
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// ---------------------------------------------------------------------------


#ifndef DETERMINISTICBASETRANSPOSE_H_
#define DETERMINISTICBASETRANSPOSE_H_

#include <permlib/change/base_transpose.h>
#include <permlib/generator/schreier_generator.h>

namespace permlib {

/// implementation of a deterministic base transposition algorithm
/**
 * all Schreier generators are considered for updating the BSGS
 */
template<class PERM, class TRANS>
class DeterministicBaseTranspose : public BaseTranspose<PERM,TRANS> {
protected:
	typedef typename BaseTranspose<PERM,TRANS>::PERMlist PERMlist;
	
	virtual Generator<PERM>* setupGenerator(BSGS<PERM,TRANS> &bsgs, unsigned int i, const PERMlist &S_i, const TRANS &U_i) const;
};

//
//     ----       IMPLEMENTATION
//

template<class PERM, class TRANS>
Generator<PERM>* DeterministicBaseTranspose<PERM,TRANS>::setupGenerator(BSGS<PERM,TRANS> &bsgs, unsigned int i, const PERMlist &S_i, const TRANS &U_i) const {
    return new SchreierGenerator<PERM,TRANS>(&U_i, S_i.begin(), S_i.end());
}

}

#endif // -- DETERMINISTICBASETRANSPOSE_H_
