class HFlexFiller: public HReconstructor

_HADES_CLASS_DESCRIPTION



 HFlexFiller

 This HReconstructor allows the user to plugin a private fill function
 defined in a macro into the Hades eventloop with full access to all data levels.
 The user can fill the category of HFlex objects.

 The user can provide his own selection fill via
 setUserFill(Int_t (*function)(HHistMap*,TObjArray* ),HHistMap* hM=0,TObjArray* params=0,Bool_t createMap=kTRUE)
 Parameters for the function can be passed via the TObjArray from the macro.
 Histogram pointers can be passed by HHistMap
 If the pointers are NULL they are simply ignored.


 example:


Int_t fillFlex(HHistMap* hM=0,TObjArray* pars=0){


    HCategory* candCat  = (HCategory*)HCategoryManager::getCategory(catParticleCand ,kTRUE ,"catParticleCand");
    HCategory* flexCat  = (HCategory*)HCategoryManager::getCategory(catFlex         ,kTRUE ,"catFlex");

    if(!flexCat) { cout<<"NO FlexCat!"<<endl; }
    if(!candCat) { cout<<"NO candCat!"<<endl; }

    if(candCat&&flexCat)
    {
      HLocation loc; // dummy loc object
	HFlex fl;
	fl.addVars("candInd=-1","chi2=-1");  // some variables  + init values

	Int_t n = candCat->getEntries();
	for(Int_t i=0; i < n; i++){

	    HParticleCand* cand = HCategoryManager::getObject(cand,candCat,i);
	    if(cand){

		Int_t   ind  = cand->getIndex();
                Float_t chi2 = cand->getChi2();
                HFlex* flex = 0;
                Int_t index;

		flex = (HFlex*) flexCat->getNewSlot(loc,&index);
       	if(flex){
		    flex = new (flex) HFlex(fl);

		    flex->setI("candInd",ind);
                    flex->setD("chi2"   ,chi2);

		}

		if(hM){
                  if(hM->get("chi2")) hM->get("chi2")->Fill(chi2);
		}

	    }

	} // end loop candidates


   }
    return 0;
}


 int dst(){

    .... hades dst macro....



    HHistMap hM("testHists.root");                              // set output file for hists
    hM.addHist(new TH1F("chi2","chi2",1000,0,1000),"tracking"); // hist will be written to directory "tracking"


    HFlexFiller* flexfiller = new HFlexFiller("FlexFiller","FlexFiller");
    flexfiller->setUserFill(fillFlex,&hM);                      // connect your private function





    // add recontructor to the end of the tasklist
    masterTaskSet->add(flexfiller);                             // connect the filler


    gHades->init();                                             // init params etc
    gHades->eventLoop(nEvents,startEvt);                        // loop over events. the function will called for each event

    hM.writeHists();                                            // store the hists

    delete gHades;
 }