//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
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// * technical work of the GEANT4 collaboration.                      *
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//
// $Id$

//
// public functions
//

//_____________________________________________________________________________
template <typename T> 
G4Parameter<T>::G4Parameter(const G4String& name, T initValue, G4MergeMode mergeMode)
 : G4VParameter(name, mergeMode),
   fValue(initValue),
   fInitValue(initValue)
{}

//_____________________________________________________________________________
template <typename T> 
G4Parameter<T>::G4Parameter(const G4Parameter& rhs)
  : G4VParameter(rhs),
    fValue(rhs.fValue),
    fInitValue(rhs.fInitValue)
{}

//_____________________________________________________________________________
template <typename T> 
G4Parameter<T>::~G4Parameter()
{}

//_____________________________________________________________________________
template <typename T> 
G4Parameter<T>&
G4Parameter<T>::operator=(const G4Parameter<T>& rhs)
{
  // check assignment to self
  if (this == &rhs) return *this;

  // base class assignment
  G4VParameter::operator=(rhs);

  // this class data assignment
  fValue = rhs.fValue;
  fInitValue = rhs.fInitValue;

  return *this;
}

//_____________________________________________________________________________
template <typename T> 
G4Parameter<T>&
G4Parameter<T>::operator+=(const G4Parameter<T>& rhs)
{
  // only update the value from rhs
  fValue += rhs.fValue;
  return *this;
}

//_____________________________________________________________________________
template <typename T> 
G4Parameter<T>&
G4Parameter<T>::operator*=(const G4Parameter<T>& rhs)
{
  // only update the value from rhs
  fValue *= rhs.fValue;
  return *this;
}

//_____________________________________________________________________________
template <typename T> 
G4Parameter<T>&
G4Parameter<T>::operator=(const T& value)
{
  // only update the value
  fValue = value;
  return *this;
}

//_____________________________________________________________________________
template <typename T> 
G4Parameter<T>&
G4Parameter<T>::operator+=(const T& value)
{
  // only update the value
  fValue += value;
  return *this;
}

//_____________________________________________________________________________
template <typename T> 
G4Parameter<T>&
G4Parameter<T>::operator*=(const T& value)
{
  // only update the value from rhs
  fValue *= value;
  return *this;
}

//_____________________________________________________________________________
template <typename T> 
void G4Parameter<T>::Merge(const G4VParameter& other)
{
  if ( fMergeMode == G4MergeMode::kAddition ) {
    fValue += static_cast<const G4Parameter<T>&>(other).fValue;
  } 
  else if ( fMergeMode == G4MergeMode::kMultiplication ) {
    fValue *= static_cast<const G4Parameter<T>&>(other).fValue;
  }
  // no operation is performed if User merge mode
}

//_____________________________________________________________________________
template <typename T> 
void G4Parameter<T>::Reset()
{
  fValue = fInitValue;
}

//_____________________________________________________________________________
template <typename T> 
T  G4Parameter<T>::GetValue() const
{
  return fValue;
}