/*
 * (C) Copyright 1996- ECMWF.
 *
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
 * In applying this licence, ECMWF does not waive the privileges and immunities
 * granted to it by virtue of its status as an intergovernmental organisation nor
 * does it submit to any jurisdiction.
 */

// File Tokenizer.h
// Manuel Fuentes - ECMWF Jan 97

#ifndef eckit_Tokenizer_h
#define eckit_Tokenizer_h

#include <set>
#include <string>
#include <vector>

#include "eckit/memory/NonCopyable.h"

namespace eckit {

//-----------------------------------------------------------------------------

class Tokenizer : private NonCopyable {

public:  // methods
    /// Contructor

    Tokenizer(char, bool keepEmpty = false);
    Tokenizer(const std::string&, bool keepEmpty = false);

    /// Destructor

    ~Tokenizer();

    void operator()(const std::string&, std::vector<std::string>&) const;
    void operator()(std::istream&, std::vector<std::string>&) const;

    void operator()(const std::string&, std::set<std::string>&) const;
    void operator()(std::istream&, std::set<std::string>&) const;

private:                                          // members
    std::set<char, std::less<char> > separator_;  // To make searching faster

    bool keepEmpty_;

private:  // methods
    void print(std::ostream&) const;

    friend std::ostream& operator<<(std::ostream& s, const Tokenizer& p) {
        p.print(s);
        return s;
    }
};


//-----------------------------------------------------------------------------

}  // namespace eckit


#endif
