PropertyVerifier.h

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// $Id:$ 
// ============================================================================
#ifndef GAUDIKERNEL_PROPERTYVERIFIER_H
#define GAUDIKERNEL_PROPERTYVERIFIER_H
// ============================================================================
// Include files 
// ============================================================================
// STD& STL 
// ============================================================================
#include <algorithm>
// ============================================================================
// GaudiKernel
// ============================================================================
#include "GaudiKernel/PropertyTypeTraits.h"
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/**********************************************************
 * Verifier Classes are used with Property Classes to 
 * provide validation criteria for Property values.
 *
 **********************************************************/
template< class T >
class PropertyVerifier 
{
public:
  // Data and Function Members for Collaborators.
  // Constructors - compiler generated default is ok
  // Destructor
  virtual ~PropertyVerifier() { }
  
  // Copy Constructor - compiler generated default is ok
  // Assignment Operator - compiler generated default is ok
  // Accessor members (const)
  virtual bool isValid ( const typename Gaudi::Utils::PropertyTypeTraits<T>::CVal value ) const = 0;
};
// ============================================================================
template< class T >
class NullVerifier : public PropertyVerifier< T > 
{
public:
  // Data and Function Members for Collaborators.
  // Constructors - compiler generated default is ok
  // Destructor
  virtual ~NullVerifier() { };
  
  // Copy Constructor - compiler generated default is ok
  // Assignment Operator - compiler generated default is ok
  
  // Accessor members (const)
  virtual bool isValid
  ( const typename Gaudi::Utils::PropertyTypeTraits<T>::CVal /* val */ ) const
  { return true; }
  
};
// ============================================================================
template< class T >
class BoundedVerifier : public PropertyVerifier< T > {     // Abstract derived class
public:
  BoundedVerifier()
    : m_hasLowerBound( false ), 
      m_hasUpperBound( false ), 
      m_lowerBound( T() ),
      m_upperBound( T() ) { }
  
  virtual ~BoundedVerifier() { }
  
  bool isValid( const typename Gaudi::Utils::PropertyTypeTraits<T>::CVal value ) const
  { 
    return  
      (( m_hasLowerBound && ( *value < m_lowerBound ) ) ? false : true ) && 
      (( m_hasUpperBound && ( *value > m_upperBound ) ) ? false : true )  ;
  }
  
  bool        hasLower() const { return m_hasLowerBound; }
  bool        hasUpper() const { return m_hasUpperBound; }
  const T&    lower()    const { return m_lowerBound; }
  const T&    upper()    const { return m_upperBound; }
  
  void setLower( const T& value ) { m_hasLowerBound = true; m_lowerBound = value; }
  void setUpper( const T& value ) { m_hasUpperBound = true; m_upperBound = value; }
  void clearLower()  { m_hasLowerBound = false; m_lowerBound = T(); }
  void clearUpper()  { m_hasUpperBound = false; m_upperBound = T(); }
  
  void setBounds( const T& lower, const T& upper) 
  {
    setLower( lower ); 
    setUpper( upper ); 
  }
  
  void clearBounds() 
  {
    clearLower(); 
    clearUpper(); 
  }
  
private:
  bool  m_hasLowerBound;
  bool  m_hasUpperBound;
  T     m_lowerBound;
  T     m_upperBound;
};
// ============================================================================

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// The END 
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#endif    // GAUDIKERNEL_PROPERTYVERIFIER_H
// =======================================================================