PermutationLattice.hpp

/*
 PermutationLattice.hpp

 Copyright (c) [2012-], Josef Robert Novak
 All rights reserved.

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  modification, are permitted #provided that the following conditions
  are met:

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  * Redistributions in binary form must reproduce the above 
    copyright notice, this list of #conditions and the following 
    disclaimer in the documentation and/or other materials provided 
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 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
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 *
 */
#ifndef PERMUTATIONLATTICE_H
#define PERMUTATIONLATTICE_H
#include <fst/fstlib.h>
using namespace fst;

class PermutationLattice {
  /*
    Generate a lazy-evaluation cascade
    to represent the set of permutations
    for a set of words.

    Each component is a counter-like linear
    chain FST, which provides a very efficient
    representation of the final result.
  */
public:
  bool make_static;
  int  length;
  map<int,int> counts;
  vector<VectorFst<StdArc> > component_fsts;
  vector<ComposeFst<StdArc> > cascade_fsts;

  PermutationLattice( );
  PermutationLattice( vector<int>* _tokens, bool _make_static );

  void generate_component_fsts( );
};

#endif // PERMUTATIONLATTICE_H //