// Copyright (C) 2003 Ronan Collobert (collober@idiap.ch)
//                
// This file is part of Torch 3.
//
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. 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 with the distribution.
// 3. The name of the author may not be used to endorse or promote products
//    derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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#ifndef PRE_PROCESSING_INC
#define PRE_PROCESSING_INC

#include "Sequence.h"

namespace Torch {

/** This class is able to do pre-processing on examples
    in a #DataSet#. Pre-processing doesn't modify the
    \emph{structure} of sequences, but only the \emph{contents}.

    @see DataSet
    @author Ronan Collobert (collober@idiap.ch)
*/
class PreProcessing : public Object
{
  public:
    ///
    PreProcessing(); 

    /// Given an input sequence, do the pre-processing.
    virtual void preProcessInputs(Sequence *inputs) = 0;

    /// Given an target sequence, do the pre-processing.
    virtual void preProcessTargets(Sequence *targets) = 0;

    virtual ~PreProcessing();
};

DEFINE_NEW_LIST(PreProcessingList, PreProcessing);

}

#endif