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// $Id: TAMBranchInfo.cxx 3115 2006-07-30 22:10:47Z loizides $
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//
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#include "TAMBranchInfo.h"
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#ifndef ROOT_TAMVirtualBranchLoader
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#include "TAMVirtualBranchLoader.h"
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#endif
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//////////////////////////////////////////////////////////////////////////
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// //
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// TAMBranchInfo //
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// //
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// Class that deals with the user pointers and interacts with //
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// the TAMVirtualBranchLoader to set up the data addresses to //
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// which these pointers point to. Also provides basic type //
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// checking. //
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// //
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// Author : Corey Reed 07/20/2004 //
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// Author : Maarten Ballintijn 12/01/2005 //
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// Author : Constantin Loizides 12/22/2005 //
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// //
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//////////////////////////////////////////////////////////////////////////
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ClassImp(TAMBranchInfo)
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//______________________________________________________________________________
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TAMBranchInfo::TAMBranchInfo(const Char_t* branchName) :
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TNamed(branchName,0), fIsLoaded(kFALSE), fLoader(0), fUsrAddresses()
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{
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// Default constructor.
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}
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//______________________________________________________________________________
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TAMBranchInfo::~TAMBranchInfo()
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{
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// Destructor.
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vector<BranchPtr_t*>::const_iterator bEnd = fUsrAddresses.end();
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for (vector<BranchPtr_t*>::iterator bIter = fUsrAddresses.begin();
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bIter!=bEnd; bIter++) {
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delete (*bIter);
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}
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delete fLoader;
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}
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//______________________________________________________________________________
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Int_t TAMBranchInfo::GetEntry(Long64_t entry)
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{
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// Load the data for this entry and set the user pointers.
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if ( fIsLoaded ) return 0;
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Int_t ret = -1;
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if(fLoader) {
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ret = fLoader->GetEntry(entry);
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if(ret>=0)
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SetUsrAddrs();
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} else {
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Error("GetEntry", "Pointer to loader is zero.");
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}
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return ret;
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}
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//______________________________________________________________________________
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void TAMBranchInfo::Init()
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{
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// Initialize the branch info by setting all user pointers to zero.
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ZeroUsrAddrs();
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}
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//______________________________________________________________________________
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Bool_t TAMBranchInfo::Notify(TTree* tree)
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{
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// This is called when a new file is opened. It then notifies
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// the corresponding loader and sets the data address
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// if necessary.
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ZeroUsrAddrs();
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if(fLoader) {
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if(!fLoader->Notify(tree)) {
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return kFALSE;
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}
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}
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return kTRUE;
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}
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//______________________________________________________________________________
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void TAMBranchInfo::SetUsrAddrs()
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{
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// Set all user pointers for this branch to point to the data address.
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vector<BranchPtr_t*>::const_iterator bEnd = fUsrAddresses.end();
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for (vector<BranchPtr_t*>::iterator bIter = fUsrAddresses.begin();
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bIter!=bEnd; bIter++) {
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(*((*bIter)->fPtr)) = fLoader->GetAddress();
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}
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fIsLoaded = kTRUE;
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}
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//______________________________________________________________________________
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void TAMBranchInfo::ZeroUsrAddrs()
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{
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// Set all user pointers for this branch to zero.
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vector<BranchPtr_t*>::const_iterator bEnd = fUsrAddresses.end();
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for (vector<BranchPtr_t*>::iterator bIter = fUsrAddresses.begin();
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bIter!=bEnd; bIter++) {
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(*((*bIter)->fPtr)) = 0;
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}
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fIsLoaded = kFALSE;
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}
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