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loizides |
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//
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// $Id: TAMTreeBranchLoader.cxx 5120 2008-05-07 18:17:33Z loizides $
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//
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#include "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", "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, 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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| 282 |
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}
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| 283 |
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//______________________________________________________________________________
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void* TAMTreeBranchLoader::GetAddress() const
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| 287 |
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{
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| 288 |
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// Return the branch address.
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| 289 |
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return fBAddr;
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| 291 |
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}
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| 292 |
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//______________________________________________________________________________
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Int_t TAMTreeBranchLoader::GetEntry(Long64_t entry)
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| 296 |
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{
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| 297 |
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// Get requested entry.
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| 298 |
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| 299 |
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Int_t ret = fBranch->GetEntry(entry);
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| 300 |
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if(ret<0) {
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| 301 |
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Error("GetEntry",
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| 302 |
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"I/O error in file [%s] (at entry %lld) "
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| 303 |
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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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| 306 |
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}
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| 307 |
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| 308 |
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return ret;
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| 309 |
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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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| 315 |
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// Notify via TAMSelector and TAMBranchInfo that a tree is
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| 316 |
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// being connected from a (new) file.
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| 317 |
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// Therefore get branch information and perform type checking.
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| 318 |
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// Set branch address if CheckBrType() was successful.
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| 320 |
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R__ASSERT( tree != 0 );
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| 322 |
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// get branch with requested branch name
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| 323 |
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// first check if given name is alias
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| 324 |
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TString brname(tree->GetAlias(GetBInfo()->GetName()));
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| 325 |
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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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| 329 |
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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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| 332 |
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}
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| 333 |
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| 334 |
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// get branch information and check if types match
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| 335 |
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if (CheckBrTypeAllModules()==kFALSE) {
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| 336 |
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Error("Notify", "CheckBrTypeAllModules failed.");
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| 337 |
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return kFALSE;
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| 338 |
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}
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| 339 |
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| 340 |
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// allocate memory on heap at fBAddr
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| 341 |
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if(!fBAddr)
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| 342 |
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AllocateMemory();
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| 343 |
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| 344 |
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// set the branch address to point to fBAddr
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| 345 |
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SetBranchAddress();
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| 346 |
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| 347 |
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return kTRUE;
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| 348 |
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}
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| 349 |
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| 350 |
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| 351 |
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//______________________________________________________________________________
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| 352 |
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void TAMTreeBranchLoader::SetBranchAddress()
|
| 353 |
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{
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| 354 |
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// Set the branch address to point to our memory (fBAddr).
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| 355 |
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| 356 |
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if (fIsClass) {
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| 357 |
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// branch stores object
|
| 358 |
|
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fBranch->SetAddress( &(fBAddr) );
|
| 359 |
|
|
} else {
|
| 360 |
|
|
// branch stores fundamentals
|
| 361 |
|
|
if (fLeafSizeConst) {
|
| 362 |
|
|
fBranch->SetAddress(fBAddr);
|
| 363 |
|
|
} else {
|
| 364 |
|
|
SetLeafAddresses();
|
| 365 |
|
|
}
|
| 366 |
|
|
}
|
| 367 |
|
|
}
|
| 368 |
|
|
|
| 369 |
|
|
|
| 370 |
|
|
//______________________________________________________________________________
|
| 371 |
|
|
void TAMTreeBranchLoader::SetLeafAddresses()
|
| 372 |
|
|
{
|
| 373 |
|
|
// Loop over the leaves in the branch and the data members of
|
| 374 |
|
|
// a (typical) struct/class used to read the branch
|
| 375 |
|
|
// assign the individual leaves to have address corresponding to
|
| 376 |
|
|
// fBAddr + (offset of each data member). This function is
|
| 377 |
|
|
// only used when the data members of the struct have different sizes and
|
| 378 |
|
|
// assumes that each module's pointer references a class or struct that
|
| 379 |
|
|
// is organized in the same way as any other module.
|
| 380 |
|
|
// CheckBrStruct() assures that this really is the case.
|
| 381 |
|
|
|
| 382 |
|
|
const type_info& usrAdrType = GetBInfo()->GetType();
|
| 383 |
|
|
TClass* cls = TClass::GetClass(usrAdrType);
|
| 384 |
|
|
if (cls!=0) {
|
| 385 |
|
|
TList* members = cls->GetListOfDataMembers();
|
| 386 |
|
|
if ( (members!=0) && (members->IsEmpty()==kFALSE) ) {
|
| 387 |
|
|
TObjArray* lvs = fBranch->GetListOfLeaves();
|
| 388 |
|
|
if (lvs!=0) {
|
| 389 |
|
|
if (members->GetSize() == lvs->GetEntriesFast()) {
|
| 390 |
|
|
TIter nextlf(lvs);
|
| 391 |
|
|
TIter nextmem(members);
|
| 392 |
|
|
TDataMember* dm = dynamic_cast<TDataMember*>(nextmem());
|
| 393 |
|
|
TLeaf* lf = dynamic_cast<TLeaf*>(nextlf());
|
| 394 |
|
|
for (; ( (lf!=0) && (dm!=0) );
|
| 395 |
|
|
dm = dynamic_cast<TDataMember*>(nextmem()),
|
| 396 |
|
|
lf = dynamic_cast<TLeaf*>(nextlf()) ) {
|
| 397 |
|
|
// the cast is just to prevent compiler warnings
|
| 398 |
|
|
lf->SetAddress( static_cast<Char_t*>(fBAddr)
|
| 399 |
|
|
+ dm->GetOffset() );
|
| 400 |
|
|
}
|
| 401 |
|
|
} else {
|
| 402 |
|
|
Error("SetLeafAddresses",
|
| 403 |
|
|
"Class [%s] has [%d] members, while branch [%s] "
|
| 404 |
|
|
"has [%d] leaves.",
|
| 405 |
|
|
cls->GetName(), members->GetSize(),
|
| 406 |
|
|
fBranch->GetName(), lvs->GetEntriesFast());
|
| 407 |
|
|
}
|
| 408 |
|
|
} else {
|
| 409 |
|
|
Error("SetLeafAddresses",
|
| 410 |
|
|
"Could not get list of leaves for branch [%s].",
|
| 411 |
|
|
fBranch->GetName());
|
| 412 |
|
|
}
|
| 413 |
|
|
} else {
|
| 414 |
|
|
Error("SetLeafAddresses",
|
| 415 |
|
|
"Could not get list of data members for class [%s].",
|
| 416 |
|
|
cls->GetName());
|
| 417 |
|
|
}
|
| 418 |
|
|
} else {
|
| 419 |
|
|
Error("SetLeafAddresses",
|
| 420 |
|
|
"Could not get class for pointer of type [%s].",
|
| 421 |
|
|
usrAdrType.name());
|
| 422 |
|
|
}
|
| 423 |
|
|
}
|
