/usr/include/ITK-4.9/itkDOMReader.h is in libinsighttoolkit4-dev 4.9.0-4ubuntu1.
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*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* 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.
*
*=========================================================================*/
#ifndef itkDOMReader_h
#define itkDOMReader_h
#include "itkDOMNodeXMLReader.h"
#include "itkObject.h"
#include "itkLogger.h"
namespace itk
{
/**
* \class DOMReader
* \brief Class to read an ITK object from an XML file or a DOM object, using the DOM APIs.
*
* End-users need to derive from this class to implement readers for user objects. In subclasses, users need
* to provide an implementation for the virtual functions GenerateData(-,-).
*
* This class performs similar functions as the XMLReader - both provide the base for handling object reading from
* an XML source. The difference is that, readers derived from this class perform object reading using the
* easy-to-use DOM APIs, while XMLReader-based readers use the more error-prone SAX (Simple API for XML) APIs.
*
* Internally, this class first implicitly creates an intermediate DOM object from the input XML file using the
* DOMNodeXMLReader, then performs output object generation by pulling information from the DOM object.
*
* Note: Though this class behaves similar to ProcessObject, it is not derived from ProcessObject. This is
* because many user objects to be read, e.g., registrations, transforms, optimizers, and so on, are not objects
* of type DataObject, thus this class cannot be connected to an ITK process pipeline.
*
* The following code snippet demontrates how to use a DOM-based reader that is derived from this class:
*
* \code
* itk::MyObjectType::Pointer output_object;
* const char* input_xml_file_name = ...
* itk::MyObjectDOMReader::Pointer reader = itk::MyObjectDOMReader::New();
* reader->SetFileName( input_xml_file_name );
* reader->Update();
* output_object = reader->GetOutput();
* \endcode
*
* \sa XMLReader
* \sa DOMNodeXMLReader
* \sa DOMNode
*
* \ingroup ITKIOXML
*/
template< typename TOutput >
class DOMReader : public Object
{
public:
/** Standard class typedefs. */
typedef DOMReader Self;
itkTypeMacro(DOMReader, Object);
typedef TOutput OutputType;
typedef DOMNode DOMNodeType;
typedef typename DOMNodeType::Pointer DOMNodePointer;
typedef Logger LoggerType;
typedef typename LoggerType::Pointer LoggerPointer;
/** Set the input XML filename. */
itkSetStringMacro(FileName);
/** Get the input XML filename. */
itkGetStringMacro(FileName);
/**
* The output object will be created automatically, but the user
* can appoint a user object as the output by calling this function.
*/
virtual void SetOutput( OutputType* output );
/** Get the output object for full access. */
OutputType* GetOutput();
/** Get the output object for read-only access. */
const OutputType* GetOutput() const;
/**
* Return the internal logger so that users can change the
* output format or add/remove logging destinations.
*/
itkGetConstMacro( Logger, LoggerType* );
/**
* Function called by Update() or end-users to generate the output object from a DOM object.
* Some derived readers may accept an incomplete DOM object during the reading process, in those cases
* the optional argument 'userdata' can be used to provide the missed information.
*/
void Update( const DOMNodeType* inputdom, const void* userdata = ITK_NULLPTR );
/**
* Function called by end-users to generate the output object from the input XML file.
*/
virtual void Update();
protected:
DOMReader();
/**
* Function to be implemented in subclasses. It is called automatically
* when update functions are performed. It should fill the contents of the output object by pulling
* information from the intermediate DOM object.
* Some derived readers may accept an incomplete DOM object during the reading process, in those cases
* the optional argument 'userdata' can be used to provide the missed information.
*/
virtual void GenerateData( const DOMNodeType* inputdom, const void* userdata ) = 0;
private:
DOMReader(const Self &) ITK_DELETE_FUNCTION;
void operator=(const Self &) ITK_DELETE_FUNCTION;
/** Get/Set the intermediate DOM object. */
itkSetObjectMacro( IntermediateDOM, DOMNodeType );
itkGetModifiableObjectMacro(IntermediateDOM, DOMNodeType );
/** Variable to hold the input XML file name. */
std::string m_FileName;
/** Variable to hold the output object, created internally or supplied by the user. */
OutputType* m_Output;
/** Variable to hold the output object if it is a smart object. */
typename LightObject::Pointer m_OutputHolder;
/** Variable to hold the intermediate DOM object. */
DOMNodePointer m_IntermediateDOM;
/** Variable to log various messages during the reading process. */
mutable LoggerPointer m_Logger;
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkDOMReader.hxx"
#endif
#endif // itkDOMReader_h
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