ENH: add empty parameter

Code/Core/otbWrapperEmptyParameter.h

+/*=========================================================================
+
+  Program:   ORFEO Toolbox
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
+  See OTBCopyright.txt 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 __otbWrapperEmptyParameter_h
+#define __otbWrapperEmptyParameter_h
+
+#include "otbWrapperParameter.h"
+
+namespace otb
+{
+namespace Wrapper
+{
+
+/** \class EmptyParameter
+ *  \brief This class represent an empty parameter for the wrapper framework (boolean value)
+ */
+class EmptyParameter
+  : public Parameter
+{
+public:
+  /** Standard class typedef */
+  typedef EmptyParameter                Self;
+  typedef itk::LightObject              Superclass;
+  typedef itk::SmartPointer<Self>       Pointer;
+  typedef itk::SmartPointer<const Self> ConstPointer;
+
+  /** Defining ::New() static method */
+  itkNewMacro(Self);
+
+  /** RTTI support */
+  itkTypeMacro(EmptyParameter, Parameter);
+
+protected:
+  /** Constructor */
+  EmptyParameter()
+  {}
+
+  /** Destructor */
+  ~EmptyParameter()
+  {}
+
+private:
+  EmptyParameter(const EmptyParameter &); //purposely not implemented
+  void operator =(const EmptyParameter&); //purposely not implemented
+
+}; // End class Parameter
+
+} // End namespace Wrapper
+} // End namespace otb
+
+#endif

Code/Core/otbWrapperStringParameter.h

@@ -44,6 +44,7 @@ public:
   /** RTTI support */
   itkTypeMacro(StringParameter, Parameter);
 
+
 protected:
   /** Constructor */
   StringParameter()
@@ -54,8 +55,8 @@ protected:
   {}
 
 private:
-  StringParameter(const Parameter &); //purposely not implemented
-  void operator =(const Parameter&); //purposely not implemented
+  StringParameter(const StringParameter &); //purposely not implemented
+  void operator =(const StringParameter&); //purposely not implemented
 
   std::string m_Value;