itkXMLFile.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkXMLFile.h,v $
  Language:  C++
  Date:      $Date: 2007-03-17 21:02:11 $
  Version:   $1.0$

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef __itkXMLFile_h
#define __itkXMLFile_h
#include "itkLightProcessObject.h"
#include "expat.h"
#include <fstream>

namespace itk
{

class 
XMLReaderBase : public LightProcessObject
{
public:
  itkSetStringMacro(Filename);

  itkGetStringMacro(Filename);

  virtual int CanReadFile(const char* name) = 0;

  virtual void GenerateOutputInformation();

  virtual void StartElement(const char * name,const char **atts) = 0;

  virtual void EndElement(const char *name) = 0;

  virtual void CharacterDataHandler(const char *inData, int inLength) = 0;
protected:

  void parse(void);
  std::string m_Filename;
};

template <class T> class 
XMLReader : public XMLReaderBase
{
public:
  void SetOutputObject(T *obj) { m_OutputObject = obj; }

  T *GetOutputObject(void) { return m_OutputObject; }
protected:
  T *m_OutputObject;
};

template <class T>
class XMLWriterBase : public LightProcessObject
{
public:
  XMLWriterBase()
    {
    m_InputObject = 0;
    }

  itkSetStringMacro(Filename);

  itkGetStringMacro(Filename);

  virtual int CanWriteFile(const char* name) = 0;

  void SetObject(T *toWrite) { m_InputObject = toWrite; }

  virtual int WriteFile() = 0;

  void WriteStartElement(const char *const tag,std::ofstream &file)
    {
    file << '<' << tag << '>';
    }

  void WriteEndElement(const char *const tag,std::ofstream &file) 
    {
    file << '<' << '/'  << tag << '>';
    }

  void WriteCharacterData(const char *const data,std::ofstream &file) 
    {
    file << data;
    }

  void WriteStartElement(std::string &tag,std::ofstream &file) 
    {
    WriteStartElement(tag.c_str(),file);
    }

  void WriteEndElement(std::string &tag,std::ofstream &file) 
    {
    WriteEndElement(tag.c_str(),file);
    }

  void WriteCharacterData(std::string &data,std::ofstream &file)
    {
    WriteCharacterData(data.c_str(),file);
    }
protected:
  T          *m_InputObject;    // object to write out to an XML file
  std::string m_Filename;       // name of file to write.
};

}
#endif

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