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//
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// $Id: TAMTreeBranchLoader.cxx,v 1.3 2009/07/13 19:20:25 loizides Exp $
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//
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#include "MitAna/TAM/interface/TAMTreeBranchLoader.h"
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#ifndef ROOT_RVersion
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#include <RVersion.h>
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#endif
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#ifndef ROOT_TError
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#include "TError.h"
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#endif
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#ifndef ROOT_TClass
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#include "TClass.h"
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#endif
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#ifndef ROOT_TList
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#include "TList.h"
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#endif
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#ifndef ROOT_TFile
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#include "TFile.h"
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#endif
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#ifndef ROOT_TBranch
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#include "TBranch.h"
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#endif
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#ifndef ROOT_TLeaf
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#include "TLeaf.h"
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#endif
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#ifndef ROOT_TDataMember
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#include "TDataMember.h"
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#endif
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#ifndef ROOT_TDataType
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#include "TDataType.h"
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#endif
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#ifndef ROOT_TTree
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#include "TTree.h"
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#endif
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#ifndef ROOT_TROOT
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#include "TROOT.h"
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#endif
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#ifndef ROOT_TClonesArray
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#include "TClonesArray.h"
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#endif
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//////////////////////////////////////////////////////////////////////////
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// //
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// TAMTreeBranchLoader //
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// //
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// Default TAM plugin that loads data from single tree branches //
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// into memory. //
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// //
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// Author : Corey Reed 07/20/2004 //
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// Maarten Ballintijn 12/06/2005 //
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// Constantin Loizides 12/06/2005 //
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// //
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//////////////////////////////////////////////////////////////////////////
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ClassImp(TAMTreeBranchLoader)
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#if ROOT_VERSION_CODE < ROOT_VERSION(5,11,3)
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#define R__ASSERT(e) \
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if (!(e)) Fatal("", kAssertMsg, _QUOTE_(e), __LINE__, __FILE__)
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#endif
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//______________________________________________________________________________
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TAMTreeBranchLoader::TAMTreeBranchLoader(TAMBranchInfo *binfo)
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: TAMVirtualBranchLoader(binfo), fBAddr(0), fIsClass(kFALSE),
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fLeafSizeConst(kTRUE), fBranch(0), fClass(0)
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{
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// Default constructor.
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}
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//______________________________________________________________________________
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TAMTreeBranchLoader::~TAMTreeBranchLoader()
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{
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// Destructor.
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DeleteMemory();
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fClass = 0;
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fBranch = 0;
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}
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//______________________________________________________________________________
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void TAMTreeBranchLoader::AllocateMemory()
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{
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// Allocate memory on heap.
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R__ASSERT(fClass != 0);
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if(fBAddr!=0) {
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Fatal("AllocateMemory",
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"Address already allocated! Must call DeleteMemory() first!");
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return;
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}
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fBAddr = fClass->New();
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}
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//______________________________________________________________________________
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Bool_t TAMTreeBranchLoader::CheckBrClass(const type_info& ptrtype,
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const TClass& cls)
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{
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// Check if the tree stores a class of the specified type
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// ptrtype is user type and cls is type found in branch.
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// check for equality
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const type_info *clt = cls.GetTypeInfo();
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if (clt!=0) {
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if ( (*clt) == ptrtype ) return kTRUE;
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} else {
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Error("CheckBrClass",
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"Could not get type_info for first leaf in branch [%s] "
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"of type [%s].",fBranch->GetName(), fBranch->GetClassName());
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return kFALSE;
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}
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// check for inheritance hierachy
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const TClass *ptrcls = gROOT->GetClass(ptrtype);
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if ( ptrcls!=0 ) {
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if ( cls.InheritsFrom(ptrcls) ) return kTRUE;
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} else {
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Error("CheckBrClass",
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"Could not get pointer to TClass for first leaf in branch [%s] "
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"of type [%s].",fBranch->GetName(), fBranch->GetClassName());
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return kFALSE;
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}
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Error("CheckBrClass",
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"Class of first leaf in branch [%s] is [%s], "
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"different (not equal/derived) from pointer type [%s].",
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fBranch->GetName(), clt->name(), ptrtype.name());
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return kFALSE;
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}
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//______________________________________________________________________________
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Bool_t TAMTreeBranchLoader::CheckBrStruct(TClass& cls)
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{
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// Given pointer is a class/struct type for a list of fundamental leaves:
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// Check that the members correspond to the leaves,
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// also check that the size of the members does not change
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// (the compiler may buffer the memory between different sized
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// members, which causes SetBranchAddress to give unexpected results).
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TList* members = cls.GetListOfDataMembers();
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if ( (members!=0) && (members->IsEmpty()==kFALSE) ) {
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TObjArray* lvs = fBranch->GetListOfLeaves();
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if (lvs!=0) {
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if (members->GetSize() == lvs->GetEntriesFast()) {
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TIter nextlf(lvs);
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TIter nextmem(members);
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TDataMember* dm = dynamic_cast<TDataMember*>(nextmem());
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TLeaf* lf = dynamic_cast<TLeaf*>(nextlf());
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const Int_t size = dm->GetUnitSize();
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for (; ( (lf!=0) && (dm!=0) );
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dm = dynamic_cast<TDataMember*>(nextmem()),
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lf = dynamic_cast<TLeaf*>(nextlf()) ) {
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if (strcmp(lf->GetTypeName(),dm->GetTypeName())!=0) {
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Error("CheckBrStruct",
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"Member [%s] of class [%s] is of type [%s], "
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"while leaf [%s] if of type [%s].",
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dm->GetName(), cls.GetName(),
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dm->GetTypeName(), lf->GetName(),
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lf->GetTypeName());
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return kFALSE;
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} else {
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fLeafSizeConst &= (size == dm->GetUnitSize());
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}
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}
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return kTRUE;
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} else {
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Error("CheckBrStruct",
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"Pointer of type [%s] has [%d] members, while branch "
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"[%s] has [%d] leaves.",
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cls.GetName(), members->GetSize(),
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fBranch->GetName(), lvs->GetEntriesFast());
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}
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} else {
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Error("CheckBrStruct",
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"Could not get list of leaves for branch [%s].",
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fBranch->GetName());
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}
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} else {
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Error("CheckBrStruct",
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"Could not get list of members for type [%s].",
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cls.GetName());
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}
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return kFALSE;
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}
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//______________________________________________________________________________
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Bool_t TAMTreeBranchLoader::CheckBrType(const type_info& ptrtype)
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{
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// Check that the specified type (of the user's pointer) corresponds with
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// what is in the tree:
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// 1. Check if the tree stores a class of the specified type
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// 2. Check the specified type is a class/struct (that is in the TClass
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// dictionary!!) whose members correspond to the leaves in the branch.
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R__ASSERT(gROOT!=0);
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// first try the branch (works only for classes)
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TClass* cls = gROOT->GetClass(fBranch->GetClassName());
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if (cls!=0) {
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// known class
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fIsClass = kTRUE;
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fClass = cls;
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return CheckBrClass(ptrtype, *cls);
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} else {
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// pointer is a class/struct, branch is list of fundamentals
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cls = TClass::GetClass(ptrtype);
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if (cls!=0) {
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fClass = cls;
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return CheckBrStruct(*cls);
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} else {
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// pointer is a fundamental type (or else unknown type)
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Error("CheckBrType",
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"Pointer for branch [%s] is of fundamental type [%d], or "
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"is a class/struct which is not in the TClass dictionary. "
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"This is not supported. See documentation.",
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fBranch->GetName(),
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static_cast<Int_t>(TDataType::GetType(ptrtype)));
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}
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}
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return kFALSE;
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}
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//______________________________________________________________________________
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Bool_t TAMTreeBranchLoader::CheckBrTypeAllModules()
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{
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// Loop over each user address and check that it's of the correct type
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// for the data contained in this branch.
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Bool_t isok=kTRUE;
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vector<TAMBranchInfo::BranchPtr_t*>::const_iterator end =
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GetBInfo()->fUsrAddresses.end();
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for (vector<TAMBranchInfo::BranchPtr_t*>::const_iterator ptr =
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GetBInfo()->fUsrAddresses.begin(); (ptr!=end) && isok; ptr++) {
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isok &= CheckBrType((*ptr)->GetType());
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}
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return isok;
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}
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//______________________________________________________________________________
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void TAMTreeBranchLoader::Clear(Option_t */*option*/)
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{
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// Clear objects in TClonesArrays that allocated memory on the heap.
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if(!fIsClass || !fBAddr)
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return;
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TString classname(fBranch->GetClassName());
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if (classname.CompareTo("TClonesArray")==0) {
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TClonesArray* ca = reinterpret_cast<TClonesArray*>(fBAddr);
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if (ca!=0) {
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ca->Clear("C");
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} else {
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Error("Clear", "Could not clear the clones array for branch %s",
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fBranch->GetName());
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}
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}
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}
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//______________________________________________________________________________
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void TAMTreeBranchLoader::DeleteMemory()
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{
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// Delete (previously) allocated memory on heap.
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if(fClass && fBAddr) {
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fClass->Destructor(fBAddr);
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fBAddr = 0;
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}
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}
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//______________________________________________________________________________
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void* TAMTreeBranchLoader::GetAddress() const
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{
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// Return the branch address.
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return fBAddr;
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}
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//______________________________________________________________________________
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Int_t TAMTreeBranchLoader::GetEntry(Long64_t entry)
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{
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// Get requested entry.
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Int_t ret = 0;
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// do not reread branch
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if (entry!=fBranch->GetReadEntry())
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ret = fBranch->GetEntry(entry);
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if(ret<0) {
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Error("GetEntry",
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"I/O error in file [%s] (at entry %lld) "
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"when accessing branch with name [%s] in requested branch list.",
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(fBranch->GetFileName()!=0) ? (fBranch->GetFileName()) : "null",
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entry, fBranch->GetName());
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}
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return ret;
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}
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//______________________________________________________________________________
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Bool_t TAMTreeBranchLoader::Notify(TTree* tree)
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{
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// Notify via TAMSelector and TAMBranchInfo that a tree is
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// being connected from a (new) file.
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// Therefore get branch information and perform type checking.
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// Set branch address if CheckBrType() was successful.
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R__ASSERT( tree != 0 );
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// get branch with requested branch name
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// first check if given name is alias
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TString brname(tree->GetAlias(GetBInfo()->GetName()));
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if (brname.IsNull())
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brname=GetBInfo()->GetName();
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fBranch = tree->GetBranch(brname);
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if (fBranch == 0) {
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Error("Notify", "GetBranch(%s) failed.", GetBInfo()->GetName());
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return kFALSE;
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}
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if (GetBInfo()->fUsrAddresses.size()) {
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// get branch information and check if types match
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if (CheckBrTypeAllModules()==kFALSE) {
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Error("Notify", "CheckBrTypeAllModules failed.");
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return kFALSE;
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}
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} else {
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// zero usr addresses (only possible for autoloading)
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TClass* cls = gROOT->GetClass(fBranch->GetClassName());
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if (cls!=0) { // known class
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fIsClass = kTRUE;
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fClass = cls;
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}
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}
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// allocate memory on heap at fBAddr
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if(!fBAddr)
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AllocateMemory();
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// set the branch address to point to fBAddr
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SetBranchAddress();
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return kTRUE;
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}
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//______________________________________________________________________________
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void TAMTreeBranchLoader::SetBranchAddress()
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{
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// Set the branch address to point to our memory (fBAddr).
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if (fIsClass) {
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// branch stores object
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fBranch->SetAddress( &(fBAddr) );
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} else {
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// branch stores fundamentals
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if (fLeafSizeConst) {
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fBranch->SetAddress(fBAddr);
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} else {
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SetLeafAddresses();
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}
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}
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}
|
| 384 |
|
| 385 |
|
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//______________________________________________________________________________
|
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void TAMTreeBranchLoader::SetLeafAddresses()
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{
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| 389 |
// Loop over the leaves in the branch and the data members of
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| 390 |
// a (typical) struct/class used to read the branch
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| 391 |
// assign the individual leaves to have address corresponding to
|
| 392 |
// fBAddr + (offset of each data member). This function is
|
| 393 |
// only used when the data members of the struct have different sizes and
|
| 394 |
// assumes that each module's pointer references a class or struct that
|
| 395 |
// is organized in the same way as any other module.
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| 396 |
// CheckBrStruct() assures that this really is the case.
|
| 397 |
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| 398 |
const type_info& usrAdrType = GetBInfo()->GetType();
|
| 399 |
TClass* cls = TClass::GetClass(usrAdrType);
|
| 400 |
if (cls!=0) {
|
| 401 |
TList* members = cls->GetListOfDataMembers();
|
| 402 |
if ( (members!=0) && (members->IsEmpty()==kFALSE) ) {
|
| 403 |
TObjArray* lvs = fBranch->GetListOfLeaves();
|
| 404 |
if (lvs!=0) {
|
| 405 |
if (members->GetSize() == lvs->GetEntriesFast()) {
|
| 406 |
TIter nextlf(lvs);
|
| 407 |
TIter nextmem(members);
|
| 408 |
TDataMember* dm = dynamic_cast<TDataMember*>(nextmem());
|
| 409 |
TLeaf* lf = dynamic_cast<TLeaf*>(nextlf());
|
| 410 |
for (; ( (lf!=0) && (dm!=0) );
|
| 411 |
dm = dynamic_cast<TDataMember*>(nextmem()),
|
| 412 |
lf = dynamic_cast<TLeaf*>(nextlf()) ) {
|
| 413 |
// the cast is just to prevent compiler warnings
|
| 414 |
lf->SetAddress( static_cast<Char_t*>(fBAddr)
|
| 415 |
+ dm->GetOffset() );
|
| 416 |
}
|
| 417 |
} else {
|
| 418 |
Error("SetLeafAddresses",
|
| 419 |
"Class [%s] has [%d] members, while branch [%s] "
|
| 420 |
"has [%d] leaves.",
|
| 421 |
cls->GetName(), members->GetSize(),
|
| 422 |
fBranch->GetName(), lvs->GetEntriesFast());
|
| 423 |
}
|
| 424 |
} else {
|
| 425 |
Error("SetLeafAddresses",
|
| 426 |
"Could not get list of leaves for branch [%s].",
|
| 427 |
fBranch->GetName());
|
| 428 |
}
|
| 429 |
} else {
|
| 430 |
Error("SetLeafAddresses",
|
| 431 |
"Could not get list of data members for class [%s].",
|
| 432 |
cls->GetName());
|
| 433 |
}
|
| 434 |
} else {
|
| 435 |
Error("SetLeafAddresses",
|
| 436 |
"Could not get class for pointer of type [%s].",
|
| 437 |
usrAdrType.name());
|
| 438 |
}
|
| 439 |
}
|
