RooAbsCache.cxx

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/*****************************************************************************
 * Project: RooFit                                                           *
 * Package: RooFitCore                                                       *
 *    File: $Id$
 * Authors:                                                                  *
 *   WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu       *
 *   DK, David Kirkby,    UC Irvine,         dkirkby@uci.edu                 *
 *                                                                           *
 * Copyright (c) 2000-2005, Regents of the University of California          *
 *                          and Stanford University. All rights reserved.    *
 *                                                                           *
 * Redistribution and use in source and binary forms,                        *
 * with or without modification, are permitted according to the terms        *
 * listed in LICENSE (http://roofit.sourceforge.net/license.txt)             *
 *****************************************************************************/
 
/**
\file RooAbsCache.cxx
\class RooAbsCache
\ingroup Roofitcore
 
Abstract base class for data members of RooAbsArgs
that cache other (composite) RooAbsArg expressions. The RooAbsCache
interface defines the interaction between the owning RooAbsArg object
and the cache data member to communicate server redirects, operation
mode changes and constant term optimization management calls.
**/
 
#include "RooAbsCache.h"
#include "RooAbsArg.h"
#include "RooArgList.h"
 
using namespace std;
 
ClassImp(RooAbsCache);
 
 
////////////////////////////////////////////////////////////////////////////////
/// Constructor. Takes owner as argument and register cache with owner.
 
RooAbsCache::RooAbsCache(RooAbsArg* owner) : _owner(owner)
{
  if (_owner) {
    _owner->registerCache(*this) ;
  }
}
 
 
////////////////////////////////////////////////////////////////////////////////
/// Copy constructor. Takes owner as argument and registers cache with owne.
 
RooAbsCache::RooAbsCache(const RooAbsCache&, RooAbsArg* owner ) : _owner(owner)
{
  if (_owner) {
    owner->registerCache(*this) ;
  }
}
 
 
////////////////////////////////////////////////////////////////////////////////
/// Destructor. Unregisters cache with owner.
 
RooAbsCache::~RooAbsCache()
{
  if (_owner) {
    _owner->unRegisterCache(*this) ;
  }
}
 
 
////////////////////////////////////////////////////////////////////////////////
/// Reset the owner, triggering the owner to register this cache in its list of caches.
void RooAbsCache::setOwner(RooAbsArg * owner)
{
  if (_owner) {
    _owner->unRegisterCache(*this) ;
  }
  _owner = owner;
  if (_owner) {
    owner->registerCache(*this) ;
  }
}