task.writefst.hpp

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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use these files 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.

// Copyright 2012 - Gonzalo Iglesias, Adrià de Gispert, William Byrne

#ifndef TASK_WRITEFST_HPP
#define TASK_WRITEFST_HPP

namespace ucam {
namespace fsttools {

template <class Data, class Arc = fst::StdArc >
class WriteFstTask: public ucam::util::TaskInterface<Data> {
  typedef typename Arc::Label Label;
  typedef typename Arc::Weight Weight;
  typedef std::vector<pair<Label, Label> > VectorPair;
 private:
  std::string fstkey_;
  std::string readfstkey_;
  ucam::util::IntegerPatternAddress fstfile_;

 public:
  WriteFstTask ( const ucam::util::RegistryPO& rg
                 , const std::string& fstkey
                 , const std::string& readfstkey = ""
               )
    : fstkey_ ( fstkey )
    , readfstkey_ (readfstkey != "" ? readfstkey : fstkey)
    , fstfile_ ( rg.get<std::string> ( fstkey ) ) {
  };

  inline static WriteFstTask * init ( const ucam::util::RegistryPO& rg
                                      , const std::string& fstkey
                                      , const std::string& readfstkey = ""
                                      ) {
    if ( rg.exists ( fstkey ) )
      return new WriteFstTask ( rg, fstkey, readfstkey );
    return NULL;
  };

  inline bool run ( Data& d ) {
    if ( fstfile_ ( d.sidx ) == "" ) return false;
    if ( d.fsts.find ( readfstkey_ ) == d.fsts.end() ) {
      LERROR ( "fst with key="  << readfstkey_ << " does not exist!" );
      exit ( EXIT_FAILURE );
    }

    FORCELINFO ("Writing lattice " << d.sidx << " to ... "
                << fstfile_( d.sidx ) );

    using namespace fst;
    FstWrite<Arc>
        ( * ( static_cast< Fst<Arc> *>
              ( d.fsts[readfstkey_] ) ), fstfile_ ( d.sidx ) );
    std::string parenskey = readfstkey_ + ".parens";
    if ( d.fsts.find ( parenskey ) != d.fsts.end() ) {
      WriteLabelPairs (fstfile_ ( d.sidx )  + ".parens",
                       * (static_cast< VectorPair * > ( d.fsts[parenskey] ) ) );
    }
    return false;
  };

 private:
  ZDISALLOW_COPY_AND_ASSIGN ( WriteFstTask );
};

}}  // end namespaces

#endif