📄 modelformat.h

📁 Amis - A maximum entropy estimator 一个最大熵模型统计工具
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////////////////////////////////////////////////////////////////////////////  Copyright (c) 2000, Yusuke Miyao///  You may distribute under the terms of the Artistic License.//////  <id>$Id: ModelFormat.h,v 1.4 2003/05/16 05:29:08 yusuke Exp $</id>///  <collection>Maximum Entropy Estimator</collection>///  <name>ModelFormat.h</name>///  <overview>Basic interface for reading model files</overview>///  <desc>///  This file provides a base class for reading model files///  Data formats should be defined in derived classes.///  </desc>/////////////////////////////////////////////////////////////////////////#ifndef Amis_ModelFormat_h_#define Amis_ModelFormat_h_#include <amis/configure.h>#include <amis/ModelBase.h>#include <amis/ErrorBase.h>#include <amis/StringStream.h>#include <memory>#include <string>AMIS_NAMESPACE_BEGINenum FeatureWeightType {  LAMBDA, ALPHA};///////////////////////////////////////////////////////////////////////// <classdef>/// <name>IllegalModelFormatError</name>/// <overview>Error exception for illegal model format</overview>/// <desc>/// The exception class is thrown by the ModelFormat class to signal/// an invalid data in a model file./// </desc>/// <see>ModelFormat</see>/// <body>class IllegalModelFormatError : public ErrorBase {public:  IllegalModelFormatError( const std::string& s, int num ) : ErrorBase() {    OStringStream os;    os << s << " at line " << num + 1;    m = os.str();  }  /// Initialize with an error message  IllegalModelFormatError( char* s, int num ) : ErrorBase() {    OStringStream os;    os << s << " at line " << num + 1;    m = os.str();  }  /// Initialize with an error message};/// </body>/// </classdef>///////////////////////////////////////////////////////////////////////// <classdef>/// <name>ModelFormat</name>/// <overview>Base class for reading model files</overview>/// <desc>/// The class provides a basic interface for importing model/// data from specified data files./// Derived classes should handle format-specific data./// </desc>/// <see>Model, Event</see>/// <body>class ModelFormat {public:  ModelFormat() {}  /// Constructor  virtual ~ModelFormat() {}  /// Destructor  virtual std::string modelFormatName() const = 0;  /// Name of the model format  virtual void inputModel( std::istream& s, ModelBase& model ) = 0;  /// Input model data from an input stream  virtual void outputModel( const ModelBase& model, std::ostream& s, int precision = DEFAULT_PRECISION ) const = 0;  /// Output model data into an output stream  static const int DEFAULT_PRECISION = 6;  /// Default value for a precision of an outputpublic:  template < FeatureWeightType FW >  static Real inputLambda( Real x );  template < FeatureWeightType FW >  static Real outputLambda( Real x );};template <>inline Real ModelFormat::inputLambda< LAMBDA >( Real x ) { return x; }template <>inline Real ModelFormat::inputLambda< ALPHA >( Real x ) { return log( x ); }template <>inline Real ModelFormat::outputLambda< LAMBDA >( Real x ) { return x; }template <>inline Real ModelFormat::outputLambda< ALPHA >( Real x ) { return exp( x ); }/// </body>/// </classdef>typedef std::auto_ptr< ModelFormat > ModelFormatPtr;AMIS_NAMESPACE_END#endif // DataFile_h_// end of DataFile.h
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