204 fEntryList(entryList),
208 ::Error(
"TTreeReader::TTreeReader",
"TTree is NULL!");
228 fEntryList(entryList),
234 std::string msg =
"No TTree called ";
236 msg +=
" was found in the selected TDirectory.";
237 Error(
"TTreeReader",
"%s", msg.c_str());
247 for (std::deque<ROOT::Internal::TTreeReaderValueBase*>::const_iterator
249 (*i)->MarkTreeReaderUnavailable();
282 Error(
"Initialize",
"We are not processing a TChain but the TEntryList contains sublists. Please "
283 "provide a simple TEntryList with no sublists instead.");
316 "The current tree in the TChain %s has changed (e.g. by TTree::Process) "
317 "even though TTreeReader::SetEntry() was called, which switched the tree "
318 "again. Did you mean to call TTreeReader::SetLocalEntry()?",
328 "The TTree / TChain has an associated TEntryList. "
329 "TTreeReader ignores TEntryLists unless you construct the TTreeReader passing a TEntryList.");
334 Error(
"SetEntryBase()",
"There was an error while notifying the proxies.");
354 for (
size_t i = 0; i <
fValues.size(); ++i) {
419 Error(
"SetEntriesRange()",
"first entry out of range 0..%lld",
GetEntries(
false));
424 if (endEntry > beginEntry)
431 if (beginEntry - 1 < 0)
439 Error(
"SetEntriesRange()",
"Error setting first entry %lld: %s",
454 tc->DropBranch(
"*",
true);
532 entryAfterList +=
static_cast<TChain *
>(
fTree)->GetTreeOffset()[treenum];
549 if (loadResult < 0) {
564 "There was an issue opening the last file associated to the TChain "
570 if (loadResult == -2) {
581 if (loadResult == -1) {
587 if (loadResult == -4) {
601 "Unexpected error '%lld' in %s::LoadTree", loadResult,
602 treeToCallLoadOn->IsA()->
GetName());
673 Error(
"RegisterValueReader",
674 "Error registering reader for %s: TTreeReaderValue/Array objects must be created before the call to Next() / SetEntry() / SetLocalEntry(), or after TTreeReader::Restart()!",
687 std::deque<ROOT::Internal::TTreeReaderValueBase*>::iterator iReader
689 if (iReader ==
fValues.end()) {
void SetReadEntry(Long64_t entry)
Move to a new entry to read entry is the 'local' entry number; i.e.
TTree * SetTree(TTree *newtree)
Base class of TTreeReaderValue.
Detail::TBranchProxy * GetProxy() const
virtual const char * GetDerivedTypeName() const =0
const char * GetBranchName() const
virtual void CreateProxy()
Create the proxy object for our branch.
A chain is a collection of files containing TTree objects.
Describe directory structure in memory.
void GetObject(const char *namecycle, T *&ptr)
Get an object with proper type checking.
A List of entry numbers in a TTree or TChain.
virtual TList * GetLists() const
virtual Long64_t GetEntry(Int_t index)
Return the number of the entry #index of this TEntryList in the TTree or TChain See also Next().
virtual Long64_t GetEntryAndTree(Int_t index, Int_t &treenum)
Return the index of "index"-th non-zero entry in the TTree or TChain and the # of the corresponding t...
virtual Long64_t GetN() const
virtual const char * GetName() const
Returns name of object.
void RemoveLink(Notifier ¬ifier)
void PrependLink(Notifier ¬ifier)
R__ALWAYS_INLINE Bool_t TestBit(UInt_t f) const
virtual void Warning(const char *method, const char *msgfmt,...) const
Issue warning message.
void SetBit(UInt_t f, Bool_t set)
Set or unset the user status bits as specified in f.
virtual Bool_t InheritsFrom(const char *classname) const
Returns kTRUE if object inherits from class "classname".
virtual void Error(const char *method, const char *msgfmt,...) const
Issue error message.
const char * Data() const
A simple, robust and fast interface to read values from ROOT columnar datasets such as TTree,...
TTreeReader()
Default constructor. Call SetTree to connect to a TTree.
Bool_t fProxiesSet
True if the proxies have been set, false otherwise.
ELoadTreeStatus fLoadTreeStatus
Indicator on how LoadTree was called 'last' time.
Long64_t GetEntries() const
Returns the number of entries of the TEntryList if one is provided, else of the TTree / TChain,...
EEntryStatus fEntryStatus
status of most recent read request
void SetTree(TTree *tree, TEntryList *entryList=nullptr)
Set (or update) the which tree to read from.
TNotifyLink< TTreeReader > fNotify
Bool_t SetProxies()
Tell readers we now have a tree.
@ kEntryNotFound
the tree entry number does not exist
@ kEntryUnknownError
LoadTree return less than -4, likely a 'newer' error code.
@ kEntryDictionaryError
problem reading dictionary info from tree
@ kEntryBeyondEnd
last entry loop has reached its end
@ kEntryChainFileError
problem in opening a chain's file
@ kEntryNoTree
the tree does not exist
@ kEntryValid
data read okay
std::deque< ROOT::Internal::TTreeReaderValueBase * > fValues
readers that use our director
Bool_t Notify()
Callback from TChain and TTree's LoadTree.
TTree * fTree
tree that's read
ROOT::Internal::TBranchProxyDirector * fDirector
proxying director, owned
~TTreeReader()
Tell all value readers that the tree reader does not exist anymore.
EEntryStatus SetEntriesRange(Long64_t beginEntry, Long64_t endEntry)
Set the begin and end entry numbers.
std::deque< ROOT::Internal::TFriendProxy * > fFriendProxies
proxying for friend TTrees, owned
Bool_t fSetEntryBaseCallingLoadTree
True if during the LoadTree execution triggered by SetEntryBase.
@ kInternalLoadTree
Notify/LoadTree was last called from SetEntryBase.
@ kNoTree
default state, no TTree is connected (formerly 'Zombie' state)
@ kExternalLoadTree
User code called LoadTree directly.
@ kLoadTreeNone
Notify has not been called yet.
void Initialize()
Initialization of the director.
void Restart()
Restart a Next() loop from entry 0 (of TEntryList index 0 of fEntryList is set).
EEntryStatus SetEntryBase(Long64_t entry, Bool_t local)
Load an entry into the tree, return the status of the read.
TEntryList * fEntryList
entry list to be used
Long64_t fEntry
Current (non-local) entry of fTree or of fEntryList if set.
Bool_t RegisterValueReader(ROOT::Internal::TTreeReaderValueBase *reader)
Add a value reader for this tree.
Long64_t fBeginEntry
This allows us to propagate the range to the TTreeCache.
void DeregisterValueReader(ROOT::Internal::TTreeReaderValueBase *reader)
Remove a value reader for this tree.
@ kBitHaveWarnedAboutEntryListAttachedToTTree
the tree had a TEntryList and we have warned about that
@ kBitIsChain
our tree is a chain
NamedProxies_t fProxies
attached ROOT::TNamedBranchProxies; owned
Long64_t fEndEntry
The end of the entry loop.
EEntryStatus SetEntry(Long64_t entry)
Set the next entry (or index of the TEntryList if that is set).
static constexpr const char *const fgEntryStatusText[kEntryUnknownError+1]
Long64_t GetCurrentEntry() const
Returns the index of the current entry being read.
A TTree represents a columnar dataset.
virtual Int_t AddBranchToCache(const char *bname, Bool_t subbranches=kFALSE)
Add branch with name bname to the Tree cache.
virtual Int_t StopCacheLearningPhase()
Stop the cache learning phase.
TFile * GetCurrentFile() const
Return pointer to the current file.
TTreeCache * GetReadCache(TFile *file) const
Find and return the TTreeCache registered with the file and which may contain branches for us.
virtual TEntryList * GetEntryList()
Returns the entry list assigned to this tree.
virtual Long64_t GetEntries() const
virtual TTree * GetTree() const
virtual Long64_t LoadTree(Long64_t entry)
Set current entry.
virtual Long64_t GetEntriesFast() const
virtual Int_t SetCacheEntryRange(Long64_t first, Long64_t last)
interface to TTreeCache to set the cache entry range
static constexpr Long64_t kMaxEntries