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/*=========================================================================
Program: Image Guided Surgery Software Toolkit
Module: $RCSfile: igstkTrackerConfigurationXMLFileReaderBase.h,v $
Language: C++
Date: $Date: 2009-04-27 18:04:49 $
Version: $Revision: 1.2 $
Copyright (c) ISC Insight Software Consortium. All rights reserved.
See IGSTKCopyright.txt or http://www.igstk.org/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 __igstkTrackerConfigurationXMLFileReaderBase_h
#define __igstkTrackerConfigurationXMLFileReaderBase_h
#include <itkXMLFile.h>
#include "igstkTrackerConfiguration.h"
#include "igstkPrecomputedTransformData.h"
namespace igstk
{
/** \class TrackerConfigurationXMLFileReaderBase
*
* \brief This class is an abstract reader for xml files containing a
* tracker configuration.
*
* This class is an abstract reader for xml files containing a
* tracker configuration. The specific type of tracker is
* defined by the subclass.
*/
class TrackerConfigurationXMLFileReaderBase : public itk::XMLReaderBase
{
public:
class UnexpectedTrackerTypeException : public std::exception
{
public:
UnexpectedTrackerTypeException() throw() { };
virtual ~UnexpectedTrackerTypeException() throw() { };
};
/**
* \class FileFormatException This is the exception that is thrown if there
* is a problem with the file format (does not follow the expected
* format).
*/
class FileFormatException : public std::exception
{
public:
/**
* Construct an exception with a specifc message.
*/
FileFormatException(const std::string &errorMessage)
{
this->m_ErrorMessage = errorMessage;
}
/**
* Virtual destructor.
*/
virtual ~FileFormatException() throw() {}
/**
* Get the error message.
*/
virtual const char* what() const throw()
{
return m_ErrorMessage.c_str();
}
private:
std::string m_ErrorMessage;
};
//standard typedefs
typedef TrackerConfigurationXMLFileReaderBase Self;
typedef itk::XMLReaderBase Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer < const Self > ConstPointer;
//run-time type information (and related methods)
itkTypeMacro( TrackerConfigurationXMLFileReaderBase, itk::XMLReaderBase );
/**
* Check that the given name isn't a zero length string, that the file exists,
* and that it isn't a directory.
*/
virtual int CanReadFile(const char* name);
/**
* Method called when a new xml tag start is encountered.
*/
virtual void StartElement( const char * name, const char **atts );
/**
* Method called when an xml tag end is encountered.
*/
virtual void EndElement( const char *name );
/**
* Method for handling the data inside an xml tag.
*/
virtual void CharacterDataHandler( const char *inData, int inLength );
/**
* Method for checking if the configuration data has been read. When the xml
* file is empty or doesn't contain the relevant tags the read operation is
* successful, but we don't have the information we need.
*/
virtual bool HaveConfigurationData() = 0;
/**
* Return a pointer to the object containing the configuration data.
*/
virtual const igstk::TrackerConfiguration::Pointer GetTrackerConfigurationData()
throw ( FileFormatException ) = 0;
protected:
//this is the constructor that is called by the factory to
//create a new object
TrackerConfigurationXMLFileReaderBase()
{
m_ReadingTrackerConfiguration = false;
m_ReadingToolConfiguration = false;
m_HaveRefreshRate = false;
m_ReferenceTool = NULL;
m_CurrentToolIsReference = false;
m_CurrentToolCalibration.SetToIdentity(
igstk::TimeStamp::GetLongestPossibleTime() );
}
virtual ~TrackerConfigurationXMLFileReaderBase()
{
std::vector<TrackerToolConfiguration *>::iterator it =
this->m_TrackerToolList.begin();
std::vector<TrackerToolConfiguration *>::iterator end =
this->m_TrackerToolList.end();
for(; it!=end; it++)
{
delete (*it);
}
delete m_ReferenceTool;
}
igstkObserverMacro( AddToolFailure,
igstk::TrackerConfiguration::AddToolFailureEvent,
std::string );
typedef igstk::PrecomputedTransformData::TransformType* TransformTypePointer;
igstkObserverMacro( RequestTransform,
igstk::PrecomputedTransformData::TransformTypeEvent,
TransformTypePointer);
void ProcessTrackingSystemAttributes( const char **atts )
throw ( FileFormatException, UnexpectedTrackerTypeException );
void ProcessRefreshRate() throw ( FileFormatException );
void ProcessToolAttributes( const char **atts ) throw ( FileFormatException );
void ProcessToolName() throw ( FileFormatException );
void ProcessToolCalibration() throw ( FileFormatException );
virtual void ProcessToolData() throw ( FileFormatException ) = 0;
virtual double GetMaximalRefreshRate()=0;
virtual std::string GetSystemType()=0;
bool m_ReadingTrackerConfiguration;
bool m_ReadingToolConfiguration;
bool m_HaveRefreshRate;
std::string m_CurrentTagData;
igstk::Transform m_CurrentToolCalibration;
std::string m_CurrentToolName;
bool m_CurrentToolIsReference;
double m_RefreshRate;
std::vector<TrackerToolConfiguration *> m_TrackerToolList;
TrackerToolConfiguration * m_ReferenceTool;
private:
TrackerConfigurationXMLFileReaderBase(
const TrackerConfigurationXMLFileReaderBase & other );
const TrackerConfigurationXMLFileReaderBase & operator=(
const TrackerConfigurationXMLFileReaderBase & right );
};
}
#endif //__igstkTrackerConfigurationXMLFileReaderBase_h
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