RooAbsCollection.cxx

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/*****************************************************************************
 * Project: RooFit                                                           *
 * Package: RooFitCore                                                       *
 * @(#)root/roofitcore:$Id$
 * 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 RooAbsCollection.cxx
\class RooAbsCollection
\ingroup Roofitcore

RooAbsCollection is an abstract container object that can hold
multiple RooAbsArg objects.  Collections are ordered and can
contain multiple objects of the same name, (but a derived
implementation can enforce unique names). The storage of objects in
implement through class RooLinkedList, a doubly linked list with an
an optional hash-table lookup mechanism for fast indexing of large
collections.
**/

#include <iomanip>
#include <fstream>
#include <vector>
#include <string>
#include <sstream>
#include <algorithm>

#include "Riostream.h"
#include "TClass.h"
#include "TStopwatch.h"
#include "TRegexp.h"
#include "RooAbsCollection.h"
#include "RooStreamParser.h"
#include "RooFormula.h"
#include "RooAbsRealLValue.h"
#include "RooAbsCategoryLValue.h"
#include "RooStringVar.h"
#include "RooTrace.h"
#include "RooArgList.h"
#include "RooLinkedListIter.h"
#include "RooCmdConfig.h"
#include "RooRealVar.h"
#include "RooGlobalFunc.h"
#include "RooMsgService.h"
using namespace std ;

#if (__GNUC__==3&&__GNUC_MINOR__==2&&__GNUC_PATCHLEVEL__==3)
char* operator+( streampos&, char* );
#endif

ClassImp(RooAbsCollection);
  ;

////////////////////////////////////////////////////////////////////////////////
/// Default constructor

RooAbsCollection::RooAbsCollection() :
  _list(0),
  _ownCont(kFALSE),
  _name(),
  _allRRV(kTRUE)
{
}



////////////////////////////////////////////////////////////////////////////////
/// Empty collection constructor

RooAbsCollection::RooAbsCollection(const char *name) :
  _list(0),
  _ownCont(kFALSE),
  _name(name),
  _allRRV(kTRUE)
{
}



////////////////////////////////////////////////////////////////////////////////
/// Copy constructor. Note that a copy of a collection is always non-owning,
/// even the source collection is owning. To create an owning copy of
/// a collection (owning or not), use the snaphot() method.

RooAbsCollection::RooAbsCollection(const RooAbsCollection& other, const char *name) :
  TObject(other),
  RooPrintable(other),
  _list(other._list.getHashTableSize()) ,
  _ownCont(kFALSE),
  _name(name),
  _allRRV(other._allRRV)
{
  RooTrace::create(this) ;
  if (!name) setName(other.GetName()) ;

  // Transfer contents (not owned)
  RooFIter iterat= other.fwdIterator();
  RooAbsArg *arg = 0;
  while((arg= iterat.next())) {
    add(*arg);
  }
}



////////////////////////////////////////////////////////////////////////////////
/// Destructor

RooAbsCollection::~RooAbsCollection()
{
  // Delete all variables in our list if we own them
  if(_ownCont){
    safeDeleteList() ;
    //_list.Delete();
  }
}



////////////////////////////////////////////////////////////////////////////////

RooLinkedListIter RooAbsCollection::iterator(Bool_t dir) const
{
    return _list.iterator(dir) ;
}

////////////////////////////////////////////////////////////////////////////////
/// Examine client server dependencies in list and
/// delete contents in safe order: any client
/// is deleted before a server is deleted

void RooAbsCollection::safeDeleteList()
{
  // Handle trivial case here
  if (_list.GetSize() > 1) {
    std::vector<RooAbsArg*> tmp;
    tmp.reserve(_list.GetSize());
    do {
      tmp.clear();
      {
        RooFIter it = _list.fwdIterator();
        RooAbsArg* arg;
        while ((arg = it.next())) {
        // Check if arg depends on remainder of list
     if (!arg->dependsOn(*this, arg)) tmp.push_back(arg);
        }
      }
      // sort and uniquify, in case some elements occur more than once
      std::sort(tmp.begin(), tmp.end());
      // okay, can remove and delete what's in tmp
      for (std::vector<RooAbsArg*>::iterator it = tmp.begin(),
     end = std::unique(tmp.begin(), tmp.end()); end != it; ++it) {
   while (_list.Remove(*it)) { };
   delete *it;
      }
    } while (!tmp.empty() && _list.GetSize() > 1);

    // Check if there are any remaining elements
    if (_list.GetSize() > 1) {
      coutW(ObjectHandling) << "RooAbsCollection::safeDeleteList(" << GetName()
   << ") WARNING: unable to delete following elements in client-server order " ;
      Print("1") ;
    }
  }

  // Built-in delete remaining elements
  _list.Delete() ;
}



////////////////////////////////////////////////////////////////////////////////
/// Take a snap shot of current collection contents:
/// An owning collection is returned containing clones of
///
///     - Elements in this collection
///     - External dependents of all elements
///       and recursively any dependents of those dependents
///       (if deepCopy flag is set)
///
/// If deepCopy is specified, the client-server links between the cloned
/// list elements and the cloned external dependents are reconnected to
/// each other, making the snapshot a completely self-contained entity.
///
///

RooAbsCollection* RooAbsCollection::snapshot(Bool_t deepCopy) const
{
  // First create empty list
  TString snapName ;
  if (TString(GetName()).Length()>0) {
    snapName.Append("Snapshot of ") ;
    snapName.Append(GetName()) ;
  }
  RooAbsCollection* output = (RooAbsCollection*) create(snapName.Data()) ;
  if (deepCopy || getSize()>1000) {
    output->setHashTableSize(1000) ;
  }
  Bool_t error = snapshot(*output,deepCopy) ;
  if (error) {
    delete output ;
    return 0 ;
  }
  output->setHashTableSize(0) ;
  return output ;
}



////////////////////////////////////////////////////////////////////////////////
/// Take a snap shot of current collection contents:
/// An owning collection is returned containing clones of
///
///     - Elements in this collection
///     - External dependents of all elements
///       and recursively any dependents of those dependents
///       (if deepCopy flag is set)
///
/// If deepCopy is specified, the client-server links between the cloned
/// list elements and the cloned external dependents are reconnected to
/// each other, making the snapshot a completely self-contained entity.
///
///

Bool_t RooAbsCollection::snapshot(RooAbsCollection& output, Bool_t deepCopy) const
{
  // Copy contents
  RooFIter iterat= fwdIterator();
  RooAbsArg *orig = 0;
  while((0 != (orig= iterat.next()))) {
    RooAbsArg *copy= (RooAbsArg*)orig->Clone();
    output.add(*copy);
  }

  RooFIter vIter = output.fwdIterator() ;
  RooAbsArg* var ;

  // Add external dependents
  Bool_t error(kFALSE) ;
  if (deepCopy) {
    // Recursively add clones of all servers
    while ((var=vIter.next())) {
      error |= output.addServerClonesToList(*var) ;
    }
  }

  // Handle eventual error conditions
  if (error) {
    coutE(ObjectHandling) << "RooAbsCollection::snapshot(): Errors occurred in deep clone process, snapshot not created" << endl ;
    output._ownCont = kTRUE ;
    return kTRUE ;
  }

   // Redirect all server connections to internal list members
  vIter = output.fwdIterator() ;
  while ((var=vIter.next())) {
    var->redirectServers(output,deepCopy) ;
  }


  // Transfer ownership of contents to list
  output._ownCont = kTRUE ;
  return kFALSE ;
}



////////////////////////////////////////////////////////////////////////////////
/// Add clones of servers of given argument to list

Bool_t RooAbsCollection::addServerClonesToList(const RooAbsArg& var)
{
  Bool_t ret(kFALSE) ;

  RooFIter sIter = var.serverMIterator() ;
  RooAbsArg* server ;
  while ((server=sIter.next())) {
    RooAbsArg* tmp = find(*server) ;
    if (!tmp) {
      RooAbsArg* serverClone = (RooAbsArg*)server->Clone() ;
      serverClone->setAttribute("SnapShot_ExtRefClone") ;
      _list.Add(serverClone) ;
      if (_allRRV && dynamic_cast<RooRealVar*>(serverClone)==0) {
   _allRRV=kFALSE ;
      }
      ret |= addServerClonesToList(*server) ;
    } else {
    }
  }
  return ret ;
}



////////////////////////////////////////////////////////////////////////////////
/// The assignment operator sets the value of any argument in our set
/// that also appears in the other set.

RooAbsCollection &RooAbsCollection::operator=(const RooAbsCollection& other)
{
  if (&other==this) return *this ;

  RooAbsArg *elem, *theirs ;
  RooFIter iter = _list.fwdIterator() ;
  while((elem=iter.next())) {
    theirs= other.find(*elem);
    if(!theirs) continue;
    theirs->syncCache() ;
    elem->copyCache(theirs) ;
   elem->setAttribute("Constant",theirs->isConstant()) ;
  }
  return *this;
}



////////////////////////////////////////////////////////////////////////////////
/// The assignment operator sets the value of any argument in our set
/// that also appears in the other set.

RooAbsCollection &RooAbsCollection::assignValueOnly(const RooAbsCollection& other, Bool_t oneSafe)
{
  if (&other==this) return *this ;

  // Short cut for 1 element assignment
  if (getSize()==1 && getSize()==other.getSize() && oneSafe) {
    other.first()->syncCache() ;
    first()->copyCache(other.first(),kTRUE) ;
    return *this ;
  }

  RooAbsArg *elem, *theirs ;
  RooFIter iter = _list.fwdIterator() ;
  while((elem=iter.next())) {
    theirs= other.find(*elem);
    if(!theirs) continue;
    theirs->syncCache() ;
    elem->copyCache(theirs,kTRUE) ;
  }
  return *this;
}



////////////////////////////////////////////////////////////////////////////////
/// Functional equivalent of operator=() but assumes this and other collection
/// have same layout. Also no attributes are copied

void RooAbsCollection::assignFast(const RooAbsCollection& other, Bool_t setValDirty)
{
  if (&other==this) return ;

  RooFIter iter = _list.fwdIterator(), iter2 = other._list.fwdIterator() ;

  if (_allRRV) {

    RooRealVar *elem, *theirs ;
    // All contents are know to be RooRealVars - fast version of assignment
    while((elem=(RooRealVar*)iter.next())) {
      // Identical size of iterators is documented assumption of method
      // coverity[NULL_RETURNS]
      theirs= (RooRealVar*)iter2.next() ;
      elem->copyCacheFast(*theirs,setValDirty) ;
    }


  } else {

    RooAbsArg *elem, *theirs ;
    while((elem=iter.next())) {

      // Identical size of iterators is documented assumption of method
      // coverity[NULL_RETURNS]
      theirs= iter2.next() ;

      theirs->syncCache() ;
      elem->copyCache(theirs,kTRUE,setValDirty) ;
    }

  }
}



////////////////////////////////////////////////////////////////////////////////
/// Add the specified argument to list. Returns kTRUE if successful, or
/// else kFALSE if a variable of the same name is already in the list.
/// This method can only be called on a list that is flagged as owning
/// all of its contents, or else on an empty list (which will force the
/// list into that mode).

Bool_t RooAbsCollection::addOwned(RooAbsArg& var, Bool_t silent)
{
  // check that we own our variables or else are empty
  if(!_ownCont && (getSize() > 0) && !silent) {
    coutE(ObjectHandling) << ClassName() << "::" << GetName() << "::addOwned: can only add to an owned list" << endl;
    return kFALSE;
  }
  _ownCont= kTRUE;

  _list.Add((RooAbsArg*)&var);
  if (_allRRV && dynamic_cast<RooRealVar*>(&var)==0) {
    _allRRV=kFALSE ;
  }

  return kTRUE;
}



////////////////////////////////////////////////////////////////////////////////
/// Add a clone of the specified argument to list. Returns a pointer to
/// the clone if successful, or else zero if a variable of the same name
/// is already in the list or the list does *not* own its variables (in
/// this case, try add() instead.) Calling addClone() on an empty list
/// forces it to take ownership of all its subsequent variables.

RooAbsArg *RooAbsCollection::addClone(const RooAbsArg& var, Bool_t silent)
{
  // check that we own our variables or else are empty
  if(!_ownCont && (getSize() > 0) && !silent) {
    coutE(ObjectHandling) << ClassName() << "::" << GetName() << "::addClone: can only add to an owned list" << endl;
    return 0;
  }
  _ownCont= kTRUE;

  // add a pointer to a clone of this variable to our list (we now own it!)
  RooAbsArg *clone2= (RooAbsArg*)var.Clone();
  if(0 != clone2) _list.Add((RooAbsArg*)clone2);
  if (_allRRV && dynamic_cast<const RooRealVar*>(&var)==0) {
    _allRRV=kFALSE ;
  }

  return clone2;
}



////////////////////////////////////////////////////////////////////////////////
/// Add the specified argument to list. Returns kTRUE if successful, or
/// else kFALSE if a variable of the same name is already in the list
/// or the list owns its variables (in this case, try addClone() or addOwned() instead).

Bool_t RooAbsCollection::add(const RooAbsArg& var, Bool_t silent)
{
  // check that this isn't a copy of a list
  if(_ownCont && !silent) {
    coutE(ObjectHandling) << ClassName() << "::" << GetName() << "::add: cannot add to an owned list" << endl;
    return kFALSE;
  }

  // add a pointer to this variable to our list (we don't own it!)
  _list.Add((RooAbsArg*)&var);
  if (_allRRV && dynamic_cast<const RooRealVar*>(&var)==0) {
    _allRRV=kFALSE ;
  }
  return kTRUE;
}



////////////////////////////////////////////////////////////////////////////////
/// Add a collection of arguments to this collection by calling add()
/// for each element in the source collection

Bool_t RooAbsCollection::add(const RooAbsCollection& list, Bool_t silent)
{
  Bool_t result(false) ;

  Int_t n= list.getSize() ;
  for(Int_t index= 0; index < n; index++) {
    result |= add((RooAbsArg&)*list._list.At(index),silent) ;
  }

  return result;
}



////////////////////////////////////////////////////////////////////////////////
/// Add a collection of arguments to this collection by calling addOwned()
/// for each element in the source collection

Bool_t RooAbsCollection::addOwned(const RooAbsCollection& list, Bool_t silent)
{
  Bool_t result(false) ;

  Int_t n= list.getSize() ;
  for(Int_t index= 0; index < n; index++) {
    result |= addOwned((RooAbsArg&)*list._list.At(index),silent) ;
  }

  return result;
}



////////////////////////////////////////////////////////////////////////////////
/// Add a collection of arguments to this collection by calling addOwned()
/// for each element in the source collection

void RooAbsCollection::addClone(const RooAbsCollection& list, Bool_t silent)
{
  Int_t n= list.getSize() ;
  for(Int_t index= 0; index < n; index++) {
    addClone((RooAbsArg&)*list._list.At(index),silent) ;
  }
}



////////////////////////////////////////////////////////////////////////////////
/// Replace any args in our set with args of the same name from the other set
/// and return kTRUE for success. Fails if this list is a copy of another.

Bool_t RooAbsCollection::replace(const RooAbsCollection &other)
{
  // check that this isn't a copy of a list
  if(_ownCont) {
    coutE(ObjectHandling) << "RooAbsCollection: cannot replace variables in a copied list" << endl;
    return kFALSE;
  }

  // loop over elements in the other list
  RooFIter otherArgs= other.fwdIterator();
  const RooAbsArg *arg = 0;
  while((arg= (const RooAbsArg*)otherArgs.next())) {

    // do we have an arg of the same name in our set?
    RooAbsArg *found= find(*arg);
    if(found) replace(*found,*arg);
  }
  return kTRUE;
}



////////////////////////////////////////////////////////////////////////////////
/// Replace var1 with var2 and return kTRUE for success. Fails if
/// this list is a copy of another, if var1 is not already in this set,
/// or if var2 is already in this set. var1 and var2 do not need to have
/// the same name.

Bool_t RooAbsCollection::replace(const RooAbsArg& var1, const RooAbsArg& var2)
{
  // check that this isn't a copy of a list
  if(_ownCont) {
    coutE(ObjectHandling) << "RooAbsCollection: cannot replace variables in a copied list" << endl;
    return kFALSE;
  }

  // is var1 already in this list?
  const char *name= var1.GetName();

  if (!_list.FindObject(&var1)) {
    coutE(ObjectHandling) << "RooAbsCollection: variable \"" << name << "\" is not in the list"
    << " and cannot be replaced" << endl;
    return kFALSE;
  }


  // is var2's name already in this list?
  if (dynamic_cast<RooArgSet*>(this)) {
    RooAbsArg *other = find(var2);
    if(other != 0 && other != &var1) {
      coutE(ObjectHandling) << "RooAbsCollection: cannot replace \"" << name
      << "\" with already existing \"" << var2.GetName() << "\"" << endl;
      return kFALSE;
    }
  }

  // replace var1 with var2
  _list.Replace(&var1,&var2) ;
//   _list.AddBefore((RooAbsArg*)&var1,(RooAbsArg*)&var2);
//   _list.Remove((RooAbsArg*)&var1);

  if (_allRRV && dynamic_cast<const RooRealVar*>(&var2)==0) {
    _allRRV=kFALSE ;
  }

  return kTRUE;
}



////////////////////////////////////////////////////////////////////////////////
/// Remove the specified argument from our list. Return kFALSE if
/// the specified argument is not found in our list. An exact pointer
/// match is required, not just a match by name. A variable can be
/// removed from a copied list and will be deleted at the same time.

Bool_t RooAbsCollection::remove(const RooAbsArg& var, Bool_t , Bool_t matchByNameOnly)
{
  // is var already in this list?
  TString name(var.GetName()) ;
  Bool_t anyFound(kFALSE) ;

  RooAbsArg* arg;
  while ((arg = (RooAbsArg*) _list.FindObject(&var))) {
    anyFound = kTRUE;
    _list.Remove(arg);
  }
  if (matchByNameOnly) {
      while ((arg = (RooAbsArg*) _list.FindObject(name.Data()))) {
     anyFound = kTRUE;
     _list.Remove(arg);
     if (_ownCont) delete arg;
      }
  }

  return anyFound ;
}



////////////////////////////////////////////////////////////////////////////////
/// Remove each argument in the input list from our list using remove(const RooAbsArg&).
/// Return kFALSE in case of problems.

Bool_t RooAbsCollection::remove(const RooAbsCollection& list, Bool_t silent, Bool_t matchByNameOnly)
{
  Bool_t result(false) ;

  Int_t n= list.getSize() ;
  for(Int_t index= 0; index < n; index++) {
    result |= remove((RooAbsArg&)*list._list.At(index),silent,matchByNameOnly) ;
  }

  return result;
}



////////////////////////////////////////////////////////////////////////////////
/// Remove all arguments from our set, deleting them if we own them.
/// This effectively restores our object to the state it would have
/// just after calling the RooAbsCollection(const char*) constructor.

void RooAbsCollection::removeAll()
{
  if(_ownCont) {
    safeDeleteList() ;
    _ownCont= kFALSE;
  }
  else {
    _list.Clear();
  }
}



////////////////////////////////////////////////////////////////////////////////
/// Set given attribute in each element of the collection by
/// calling each elements setAttribute() function.

void RooAbsCollection::setAttribAll(const Text_t* name, Bool_t value)
{
  RooFIter iter= fwdIterator() ;
  RooAbsArg* arg ;
  while ((arg=iter.next())) {
    arg->setAttribute(name,value) ;
  }
}




////////////////////////////////////////////////////////////////////////////////
/// Create a subset of the current collection, consisting only of those
/// elements with the specified attribute set. The caller is responsibe
/// for deleting the returned collection

RooAbsCollection* RooAbsCollection::selectByAttrib(const char* name, Bool_t value) const
{
  TString selName(GetName()) ;
  selName.Append("_selection") ;
  RooAbsCollection *sel = (RooAbsCollection*) create(selName.Data()) ;

  // Scan set contents for matching attribute
  RooFIter iter= fwdIterator() ;
  RooAbsArg* arg ;
  while ((arg=iter.next())) {
    if (arg->getAttribute(name)==value)
      sel->add(*arg) ;
  }

  return sel ;
}




////////////////////////////////////////////////////////////////////////////////
/// Create a subset of the current collection, consisting only of those
/// elements that are contained as well in the given reference collection.
/// The caller is responsible for deleting the returned collection

RooAbsCollection* RooAbsCollection::selectCommon(const RooAbsCollection& refColl) const
{
  // Create output set
  TString selName(GetName()) ;
  selName.Append("_selection") ;
  RooAbsCollection *sel = (RooAbsCollection*) create(selName.Data()) ;

  // Scan set contents for matching attribute
  RooFIter iter= fwdIterator() ;
  RooAbsArg* arg ;
  while ((arg=iter.next())) {
    if (refColl.find(*arg))
      sel->add(*arg) ;
  }

  return sel ;
}



////////////////////////////////////////////////////////////////////////////////
/// Create a subset of the current collection, consisting only of those
/// elements with names matching the wildcard expressions in nameList,
/// supplied as a comma separated list

RooAbsCollection* RooAbsCollection::selectByName(const char* nameList, Bool_t verbose) const
{
  // Create output set
  TString selName(GetName()) ;
  selName.Append("_selection") ;
  RooAbsCollection *sel = (RooAbsCollection*) create(selName.Data()) ;

  const size_t bufSize = strlen(nameList) + 1;
  char* buf = new char[bufSize] ;
  strlcpy(buf,nameList,bufSize) ;
  char* wcExpr = strtok(buf,",") ;
  while(wcExpr) {
    TRegexp rexp(wcExpr,kTRUE) ;
    if (verbose) {
      cxcoutD(ObjectHandling) << "RooAbsCollection::selectByName(" << GetName() << ") processing expression '" << wcExpr << "'" << endl ;
    }

    RooFIter iter = fwdIterator() ;
    RooAbsArg* arg ;
    while((arg=iter.next())) {
      if (TString(arg->GetName()).Index(rexp)>=0) {
   if (verbose) {
     cxcoutD(ObjectHandling) << "RooAbsCollection::selectByName(" << GetName() << ") selected element " << arg->GetName() << endl ;
   }
   sel->add(*arg) ;
      }
    }
    wcExpr = strtok(0,",") ;
  }
  delete[] buf ;

  return sel ;
}




////////////////////////////////////////////////////////////////////////////////
/// Check if this and other collection have identically named contents

Bool_t RooAbsCollection::equals(const RooAbsCollection& otherColl) const
{
  // First check equal length
  if (getSize() != otherColl.getSize()) return kFALSE ;

  // Then check that each element of our list also occurs in the other list
  RooFIter iter = fwdIterator() ;
  RooAbsArg* arg ;
  while((arg=iter.next())) {
    if (!otherColl.find(*arg)) {
      return kFALSE ;
    }
  }
  return kTRUE ;
}




////////////////////////////////////////////////////////////////////////////////
/// Check if this and other collection have common entries

Bool_t RooAbsCollection::overlaps(const RooAbsCollection& otherColl) const
{
  RooFIter iter = fwdIterator() ;
  RooAbsArg* arg ;
  while((arg=iter.next())) {
    if (otherColl.find(*arg)) {
      return kTRUE ;
    }
  }
  return kFALSE ;
}




////////////////////////////////////////////////////////////////////////////////
/// Find object with given name in list. A null pointer
/// is returned if no object with the given name is found

RooAbsArg *RooAbsCollection::find(const char *name) const
{
  return (RooAbsArg*) _list.find(name);
}



////////////////////////////////////////////////////////////////////////////////
/// Find object with given name in list. A null pointer
/// is returned if no object with the given name is found

RooAbsArg *RooAbsCollection::find(const RooAbsArg& arg) const
{
  return (RooAbsArg*) _list.findArg(&arg);
}



////////////////////////////////////////////////////////////////////////////////
/// Return comma separated list of contained object names as STL string

string RooAbsCollection::contentsString() const
{
  string retVal ;
  RooFIter iter = fwdIterator() ;
  RooAbsArg* arg ;
  Bool_t isFirst(kTRUE) ;
  while((arg=iter.next())) {
    if (isFirst) {
      isFirst=kFALSE ;
    } else {
      retVal += "," ;
    }
    retVal += arg->GetName() ;
  }
  return retVal ;
}



////////////////////////////////////////////////////////////////////////////////
/// Return collection name

void RooAbsCollection::printName(ostream& os) const
{
  os << GetName() ;
}



////////////////////////////////////////////////////////////////////////////////
/// Return collection title

void RooAbsCollection::printTitle(ostream& os) const
{
  os << GetTitle() ;
}



////////////////////////////////////////////////////////////////////////////////
/// Return collection class name

void RooAbsCollection::printClassName(ostream& os) const
{
  os << IsA()->GetName() ;
}



////////////////////////////////////////////////////////////////////////////////
/// Define default RooPrinable print options for given Print() flag string
/// For inline printing only show value of objects, for default print show
/// name,class name value and extras of each object. In verbose mode
/// also add object adress, argument and title

Int_t RooAbsCollection::defaultPrintContents(Option_t* opt) const
{
  if (opt && TString(opt)=="I") {
    return kValue ;
  }
  if (opt && TString(opt).Contains("v")) {
    return kAddress|kName|kArgs|kClassName|kValue|kTitle|kExtras ;
  }
  return kName|kClassName|kValue ;
}





////////////////////////////////////////////////////////////////////////////////
/// Print value of collection, i.e. a comma separated list of contained
/// object names

void RooAbsCollection::printValue(ostream& os) const
{
  Bool_t first2(kTRUE) ;
  os << "(" ;
  RooFIter iter = fwdIterator() ;
  RooAbsArg* arg ;
  while((arg=iter.next())) {
    if (!first2) {
      os << "," ;
    } else {
      first2 = kFALSE ;
    }
    if (arg->IsA()->InheritsFrom(RooStringVar::Class())) {
       os << '\'' << ((RooStringVar *)arg)->getVal() << '\'';
    } else {
       os << arg->GetName();
    }
  }
  os << ")" ;
}



////////////////////////////////////////////////////////////////////////////////
/// Implement multiline printin of collection, one line for each ontained object showing
/// the requested content

void RooAbsCollection::printMultiline(ostream&os, Int_t contents, Bool_t /*verbose*/, TString indent) const
{
  if (TString(GetName()).Length()>0 && (contents&kCollectionHeader)) {
    os << indent << ClassName() << "::" << GetName() << ":" << (_ownCont?" (Owning contents)":"") << endl;
  }

  RooFIter iterat= fwdIterator();
  int index= 0;
  RooAbsArg *next = 0;
  TString deeper(indent);
  deeper.Append("     ");

  // Adjust the with of the name field to fit the largest name, if requesed
  Int_t maxNameLen(1) ;
  Int_t nameFieldLengthSaved = RooPrintable::_nameLength ;
  if (nameFieldLengthSaved==0) {
    while((next=iterat.next())) {
      Int_t len = strlen(next->GetName()) ;
      if (len>maxNameLen) maxNameLen = len ;
    }
    iterat = fwdIterator() ;
    RooPrintable::nameFieldLength(maxNameLen+1) ;
  }

  while((0 != (next= iterat.next()))) {
    os << indent << setw(3) << ++index << ") ";
    next->printStream(os,contents,kSingleLine,"");
  }

  // Reset name field length, if modified
  RooPrintable::nameFieldLength(nameFieldLengthSaved) ;
}



////////////////////////////////////////////////////////////////////////////////
/// Base contents dumper for debugging purposes

void RooAbsCollection::dump() const
{
  RooFIter iter = fwdIterator() ;
  RooAbsArg* arg ;
  while((arg=iter.next())) {
    cout << arg << " " << arg->IsA()->GetName() << "::" << arg->GetName() << " (" << arg->GetTitle() << ")" << endl ;
  }
}



////////////////////////////////////////////////////////////////////////////////
/// Output content of collection as LaTex table. By default a table with two columns is created: the left
/// column contains the name of each variable, the right column the value.
///
/// The following optional named arguments can be used to modify the default behavior
///
///   Columns(Int_t ncol)                    -- Fold table into multiple columns, i.e. ncol=3 will result in 3 x 2 = 6 total columns
///   Sibling(const RooAbsCollection& other) -- Define sibling list. The sibling list is assumed to have objects with the same
///                                             name in the same order. If this is not the case warnings will be printed. If a single
///                                             sibling list is specified, 3 columns will be output: the (common) name, the value of this
///                                             list and the value in the sibling list. Multiple sibling lists can be specified by
///                                             repeating the Sibling() command.
///   Format(const char* str)                -- Classic format string, provided for backward compatibility
///   Format(...)                            -- Formatting arguments, details are given below
///   OutputFile(const char* fname)          -- Send output to file with given name rather than standard output
///
/// The Format(const char* what,...) has the following structure
///
///   const char* what          -- Controls what is shown. "N" adds name, "E" adds error,
///                                "A" shows asymmetric error, "U" shows unit, "H" hides the value
///   FixedPrecision(int n)     -- Controls precision, set fixed number of digits
///   AutoPrecision(int n)      -- Controls precision. Number of shown digits is calculated from error
///                                + n specified additional digits (1 is sensible default)
///   VerbatimName(Bool_t flag) -- Put variable name in a \\verb+   + clause.
///
/// Example use: list.printLatex(Columns(2), Format("NEU",AutoPrecision(1),VerbatimName()) ) ;

void RooAbsCollection::printLatex(const RooCmdArg& arg1, const RooCmdArg& arg2,
              const RooCmdArg& arg3, const RooCmdArg& arg4,
              const RooCmdArg& arg5, const RooCmdArg& arg6,
              const RooCmdArg& arg7, const RooCmdArg& arg8) const
{


  // Define configuration for this method
  RooCmdConfig pc("RooAbsCollection::printLatex()") ;
  pc.defineInt("ncol","Columns",0,1) ;
  pc.defineString("outputFile","OutputFile",0,"") ;
  pc.defineString("format","Format",0,"NEYVU") ;
  pc.defineInt("sigDigit","Format",0,1) ;
  pc.defineObject("siblings","Sibling",0,0,kTRUE) ;
  pc.defineInt("dummy","FormatArgs",0,0) ;
  pc.defineMutex("Format","FormatArgs") ;

  // Stuff all arguments in a list
  RooLinkedList cmdList;
  cmdList.Add(const_cast<RooCmdArg*>(&arg1)) ;  cmdList.Add(const_cast<RooCmdArg*>(&arg2)) ;
  cmdList.Add(const_cast<RooCmdArg*>(&arg3)) ;  cmdList.Add(const_cast<RooCmdArg*>(&arg4)) ;
  cmdList.Add(const_cast<RooCmdArg*>(&arg5)) ;  cmdList.Add(const_cast<RooCmdArg*>(&arg6)) ;
  cmdList.Add(const_cast<RooCmdArg*>(&arg7)) ;  cmdList.Add(const_cast<RooCmdArg*>(&arg8)) ;

  // Process & check varargs
  pc.process(arg1,arg2,arg3,arg4,arg5,arg6,arg7,arg8) ;
  if (!pc.ok(kTRUE)) {
    return ;
  }

  const char* outFile = pc.getString("outputFile") ;
  if (outFile && strlen(outFile)) {
    ofstream ofs(outFile) ;
    if (pc.hasProcessed("FormatArgs")) {
      RooCmdArg* formatCmd = static_cast<RooCmdArg*>(cmdList.FindObject("FormatArgs")) ;
      formatCmd->addArg(RooFit::LatexTableStyle()) ;
      printLatex(ofs,pc.getInt("ncol"),0,0,pc.getObjectList("siblings"),formatCmd) ;
    } else {
      printLatex(ofs,pc.getInt("ncol"),pc.getString("format"),pc.getInt("sigDigit"),pc.getObjectList("siblings")) ;
    }
  } else {
    if (pc.hasProcessed("FormatArgs")) {
      RooCmdArg* formatCmd = static_cast<RooCmdArg*>(cmdList.FindObject("FormatArgs")) ;
      formatCmd->addArg(RooFit::LatexTableStyle()) ;
      printLatex(cout,pc.getInt("ncol"),0,0,pc.getObjectList("siblings"),formatCmd) ;
    } else {
      printLatex(cout,pc.getInt("ncol"),pc.getString("format"),pc.getInt("sigDigit"),pc.getObjectList("siblings")) ;
    }
  }
}




////////////////////////////////////////////////////////////////////////////////
/// Internal implementation function of printLatex

void RooAbsCollection::printLatex(ostream& ofs, Int_t ncol, const char* option, Int_t sigDigit, const RooLinkedList& siblingList, const RooCmdArg* formatCmd) const
{
  // Count number of rows to print
  Int_t nrow = (Int_t) (getSize() / ncol + 0.99) ;
  Int_t i,j,k ;

  // Sibling list do not need to print their name as it is supposed to be the same
  TString sibOption ;
  RooCmdArg sibFormatCmd ;
  if (option) {
    sibOption = option ;
    sibOption.ReplaceAll("N","") ;
    sibOption.ReplaceAll("n","") ;
  } else {
    sibFormatCmd = *formatCmd ;
    TString tmp = formatCmd->_s[0] ;
    tmp.ReplaceAll("N","") ;
    tmp.ReplaceAll("n","") ;
    static char buf[100] ;
    strlcpy(buf,tmp.Data(),100) ;
    sibFormatCmd._s[0] = buf ;
  }


  // Make list of lists ;
  RooLinkedList listList ;
  listList.Add((RooAbsArg*)this) ;
  RooFIter sIter = siblingList.fwdIterator() ;
  RooAbsCollection* col ;
  while((col=(RooAbsCollection*)sIter.next())) {
    listList.Add(col) ;
  }

  RooLinkedList listListRRV ;

  // Make list of RRV-only components
  RooFIter lIter = listList.fwdIterator() ;
  RooArgList* prevList = 0 ;
  while((col=(RooAbsCollection*)lIter.next())) {
    RooArgList* list = new RooArgList ;
    RooFIter iter = col->fwdIterator() ;
    RooAbsArg* arg ;
    while((arg=iter.next())) {

      RooRealVar* rrv = dynamic_cast<RooRealVar*>(arg) ;
      if (rrv) {
   list->add(*rrv) ;
      } else {
   coutW(InputArguments) << "RooAbsCollection::printLatex: can only print RooRealVar in LateX, skipping non-RooRealVar object named "
        << arg->GetName() << endl ;
      }
      if (prevList && TString(rrv->GetName()).CompareTo(prevList->at(list->getSize()-1)->GetName())) {
   coutW(InputArguments) << "RooAbsCollection::printLatex: WARNING: naming and/or ordering of sibling list is different" << endl ;
      }
    }
    listListRRV.Add(list) ;
    if (prevList && list->getSize() != prevList->getSize()) {
      coutW(InputArguments) << "RooAbsCollection::printLatex: ERROR: sibling list(s) must have same length as self" << endl ;
      delete list ;
      listListRRV.Delete() ;
      return ;
    }
    prevList = list ;
  }

  // Construct table header
  Int_t nlist = listListRRV.GetSize() ;
  TString subheader = "l" ;
  for (k=0 ; k<nlist ; k++) subheader += "c" ;

  TString header = "\\begin{tabular}{" ;
  for (j=0 ; j<ncol ; j++) {
    if (j>0) header += "|" ;
    header += subheader ;
  }
  header += "}" ;
  ofs << header << endl ;


  // Print contents, delegating actual printing to RooRealVar::format()
  for (i=0 ; i<nrow ; i++) {
    for (j=0 ; j<ncol ; j++) {
      for (k=0 ; k<nlist ; k++) {
   RooRealVar* par = (RooRealVar*) ((RooArgList*)listListRRV.At(k))->at(i+j*nrow) ;
   if (par) {
     if (option) {
       TString* tmp = par->format(sigDigit,(k==0)?option:sibOption.Data()) ;
       ofs << *tmp ;
       delete tmp ;
     } else {
       TString* tmp = par->format((k==0)?*formatCmd:sibFormatCmd) ;
       ofs << *tmp ;
       delete tmp ;
     }
   }
   if (!(j==ncol-1 && k==nlist-1)) {
     ofs << " & " ;
   }
      }
    }
    ofs << "\\\\" << endl ;
  }

  ofs << "\\end{tabular}" << endl ;
  listListRRV.Delete() ;
}




////////////////////////////////////////////////////////////////////////////////
/// Return true if all contained object report to have their
/// value inside the specified range

Bool_t RooAbsCollection::allInRange(const char* rangeSpec) const
{
  if (!rangeSpec) return kTRUE ;

  // Parse rangeSpec specification
  vector<string> cutVec ;
  if (rangeSpec && strlen(rangeSpec)>0) {
    if (strchr(rangeSpec,',')==0) {
      cutVec.push_back(rangeSpec) ;
    } else {
      const size_t bufSize = strlen(rangeSpec)+1;
      char* buf = new char[bufSize] ;
      strlcpy(buf,rangeSpec,bufSize) ;
      const char* oneRange = strtok(buf,",") ;
      while(oneRange) {
   cutVec.push_back(oneRange) ;
   oneRange = strtok(0,",") ;
      }
      delete[] buf ;
    }
  }


  RooFIter iter = _list.fwdIterator() ;

  // Apply range based selection criteria
  Bool_t selectByRange = kTRUE ;
  RooAbsArg* arg ;
  while((arg=iter.next())) {
    Bool_t selectThisArg = kFALSE ;
    UInt_t icut ;
    for (icut=0 ; icut<cutVec.size() ; icut++) {
      if (arg->inRange(cutVec[icut].c_str())) {
   selectThisArg = kTRUE ;
   break ;
      }
    }
    if (!selectThisArg) {
      selectByRange = kFALSE ;
      break ;
    }
  }

  return selectByRange ;
}



////////////////////////////////////////////////////////////////////////////////

void RooAbsCollection::makeStructureTag()
{
}


////////////////////////////////////////////////////////////////////////////////

void RooAbsCollection::makeTypedStructureTag()
{
}

////////////////////////////////////////////////////////////////////////////////
/// If one of the TObject we have a referenced to is deleted, remove the
/// reference.

void RooAbsCollection::RecursiveRemove(TObject *obj)
{
   if (obj && obj->InheritsFrom(RooAbsArg::Class())) remove(*(RooAbsArg*)obj,false,false);
}