DataUtil/src/TreeWriter.cc

// $Id: TreeWriter.cc,v 1.4 2008/06/09 11:47:03 paus Exp $

#include "MitAna/DataUtil/interface/TreeWriter.h"

#include <Riostream.h>
#include <TObject.h>
#include <TSystem.h>
#include <TProcessID.h>

#include "MitAna/DataUtil/interface/Debug.h"

using namespace mithep;

ClassImp(mithep::TreeWriter)

//__________________________________________________________________________________________________
TreeWriter::TreeWriter(const char *tname, Bool_t doreset) : 
  TNamed(tname,Form("%s written by mithep::TreeWriter", tname)),
  fBaseURL("."), 
  fPrefix("mithep"), 
  fFileNumber(0),
  fCompressLevel(9),
  fDefBrSize(64*1024),
  fDefSL(99),
  fMaxSize((Long64_t)(0.99 * TTree::GetMaxTreeSize())),
  fkMinFreeSpace(1024*1024), 
  fkMinAvgSize(10*1024), 
  fEvtObjNum(-1), 
  fIsInit(kFALSE), 
  fDoObjNumReset(doreset), 
  fFile(0), 
  fTrees(0)
{
  // Constructor.

  fTrees.SetOwner();
}

//__________________________________________________________________________________________________
TreeWriter::~TreeWriter()
{
  // Destructor.
   
  if (fIsInit) {
    CloseFile();
  }

  TDirectory::TContext context(0); 
  fTrees.Clear();
}

//__________________________________________________________________________________________________
void TreeWriter::AddBranch(const char *name, const char *cname, 
                           void *obj, Int_t bsize, Int_t level)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer for class name "cname" using a given buffer size and splitlevel.

  MyTree *t = AddOrGetMyTree(GetName());
  t->Bronch(name, cname, obj, bsize, level);
}


//__________________________________________________________________________________________________
void TreeWriter::AddBranch(const char *name, void *obj, Int_t bsize, Int_t level)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer using a given buffer size and splitlevel.

  AddBranch(name, CName(obj), obj, bsize, level);
}

//__________________________________________________________________________________________________
void TreeWriter::AddBranch(const char *name, const char *cname, 
                           void *obj, Int_t bsize)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer for class name "cname" using a given buffer size and default splitlevel.

  MyTree *t = AddOrGetMyTree(GetName());
  t->Bronch(name, cname, obj, bsize, fDefSL);
}

//__________________________________________________________________________________________________
void TreeWriter::AddBranch(const char *name, void *obj, Int_t bsize)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer using a given buffer size and default splitlevel.

  AddBranch(name, CName(obj), obj, bsize);
}

//__________________________________________________________________________________________________
void TreeWriter::AddBranch(const char *name, const char *cname, 
                           void *obj)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer for class name "cname" using a default buffer size and splitlevel.

  MyTree *t = AddOrGetMyTree(GetName());
  t->Bronch(name, cname, obj, fDefBrSize, fDefSL);
}

//__________________________________________________________________________________________________
void TreeWriter::AddBranch(const char *name, void *obj)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer using a default buffer size and splitlevel.

  AddBranch(name, CName(obj), obj);
}

//__________________________________________________________________________________________________
void TreeWriter::AddBranchToTree(const char *tname, const char *name, const char *cname, 
                                 void *obj, Int_t bsize, Int_t level)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer for class name "cname" using a given buffer size and splitlevel.

  MyTree *t = AddOrGetMyTree(tname);
  t->Bronch(name, cname, obj, bsize, level);
}

//__________________________________________________________________________________________________
void TreeWriter::AddBranchToTree(const char *tname, const char *name, void *obj, 
                                 Int_t bsize, Int_t level)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer using a given buffer size and splitlevel.

  AddBranchToTree(tname, name, CName(obj), obj, bsize, level);
}

//__________________________________________________________________________________________________
void TreeWriter::AddBranchToTree(const char *tname, const char *name, const char *cname, 
                                 void *obj, Int_t bsize)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer for class name "cname" using a given buffer size and default splitlevel.

  MyTree *t = AddOrGetMyTree(tname);
  t->Bronch(name, cname, obj, bsize, fDefSL);
}

//__________________________________________________________________________________________________
void TreeWriter::AddBranchToTree(const char *tname, const char *name, void *obj,
                                 Int_t bsize)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer using a given buffer size and default splitlevel.

  AddBranchToTree(tname, name, CName(obj), obj, bsize);
}

//__________________________________________________________________________________________________
void TreeWriter::AddBranchToTree(const char *tname, const char *name, const char *cname, 
                                 void *obj)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer for class name "cname" using a default buffer size and splitlevel.

  MyTree *t = AddOrGetMyTree(tname);
  t->Bronch(name, cname, obj, fDefBrSize, fDefSL);
}

//__________________________________________________________________________________________________
void TreeWriter::AddBranchToTree(const char *tname, const char *name, void *obj)
{
  // Add branch with name "name" into tree with name "tname" and set its address 
  // to object pointer for class name "cname" using a default buffer size and splitlevel.

  AddBranchToTree(tname, name, CName(obj), obj);
}

//__________________________________________________________________________________________________
MyTree *TreeWriter::AddOrGetMyTree(const char *tn)
{
  // Add new tree if not present in array of trees or return
  // present tree.

  MyTree *tree = dynamic_cast<MyTree*>(fTrees.FindObject(tn));
  if (tree)
    return tree;

  TDirectory::TContext context(fFile); 
  tree = new MyTree(tn, tn);
  tree->SetDirectory(fFile);
  fTrees.AddLast(tree);  
  return tree;
}

//__________________________________________________________________________________________________
Bool_t TreeWriter::BeginEvent(Bool_t doreset)
{
  // Prepare for the next event. If doreset or fDoObjNumReset is kTRUE
  // store the current object number to be reset in FillEvent().

  if (!fIsInit) {
    OpenFile();
  }

  if (doreset || fDoObjNumReset) {
    fEvtObjNum = TProcessID::GetObjectCount();
  }

  return kTRUE;
}

//__________________________________________________________________________________________________
void TreeWriter::CloseFile()
{
  // Write tree(s) and close file.

  if (!fIsInit) {
    Fatal("CloseFile", "File was not opened, call OpenFile() first!");
    return;
  }

  TDirectory::TContext context(fFile); // cd fFile && 
                                       // automatically restore gDirectory

  for (Int_t i=0;i<fTrees.GetEntries();++i) {
    MyTree *mt = static_cast<MyTree*>(fTrees.At(i));
    mt->Write(mt->GetName(),TObject::kOverwrite);
    mt->Reset();
    mt->SetDirectory(0);   
  }

  fFile->Close();
  delete fFile; 
  fFile = 0;

  fIsInit = kFALSE; 
  fFileNumber++;  
}

//__________________________________________________________________________________________________
const char *TreeWriter::CName(void *obj) const 
{
  // Dereference void* pointer into TObject* pointer

  TObject *tobj = dynamic_cast<TObject*>(*(TObject**)obj);
  if (tobj==0) {
    Fatal("ClassName", "Given void* ptr can not be dereferenced into TObject*");
  }
  return tobj->ClassName();
}

//__________________________________________________________________________________________________
Bool_t TreeWriter::EndEvent(Bool_t doreset)
{
  // Store the event in the tree. If doreset or fDoObjNumReset is kTRUE
  // restore the stored object number at the time BeginEvent(kTRUE) 
  // was called.
   
  if (!fIsInit) {
    Fatal("EndEvent", "File is not open, did you call BeginEvent?");
    return kFALSE;
  }

  Int_t r = 0;
  for (Int_t i=0;i<fTrees.GetEntries();++i) {
    MyTree *mt = static_cast<MyTree*>(fTrees.At(i));
    if (mt->GetAutoFill()==0)
      continue;
    r += mt->Fill();
  }

  if (IsFull())
    CloseFile();

  if (doreset || fDoObjNumReset) {
    if (fEvtObjNum<0) {
      Error("EndEvent", "Object counter is zero. Did you call BeginEvent(kTRUE)?");
    } else {
      // Reset the TRef table. keep it from growing with each event (see doc)
      TProcessID::SetObjectCount(fEvtObjNum);
    }
  }

  return (r >= 0);
}

//-------------------------------------------------------------------------------------------------
Long64_t TreeWriter::GetEntries(const char *tn) const
{ 
  //

   if (fTrees.GetEntries()==0) return -1;

   if (tn) {
     const TTree *mt=GetTree(tn);
     if (mt)
       return mt->GetEntries();
     else
       return -1;
   }

   Long64_t ret = 0;
   for (Int_t i=0;i<fTrees.GetEntries();++i) {
      const MyTree *mt = static_cast<const MyTree*>(fTrees.At(i));
      ret += mt->GetEntries();
   }
   return ret;
}

//-------------------------------------------------------------------------------------------------
MyTree *mithep::TreeWriter::GetMyTree(const char *tn)
{
  // Return MyTree with given name from array.

  if (fTrees.GetEntries()==0) 
    return 0;

  TObject *obj = 0;
  if (tn==0) {
    obj = fTrees.At(0);
  } else {
    obj = fTrees.FindObject(tn);
  }
  
  if (obj)  
    return static_cast<MyTree*>(obj);
  return 0;
}   

//-------------------------------------------------------------------------------------------------
const TTree *mithep::TreeWriter::GetTree(const char *tn) const
{
  // Return TTree with given name from array.

  if (fTrees.GetEntries()==0) 
    return 0;

  TObject *obj = 0;
  if (tn==0) {
    obj = fTrees.At(0);
  } else {
    obj = fTrees.FindObject(tn);
  }
  
  if (obj)  
    return dynamic_cast<const TTree*>(obj);
  return 0;
}   

//-------------------------------------------------------------------------------------------------
TTree *mithep::TreeWriter::GetTree(const char *tn)
{
  // Return TTree with given name from array.

  if (fTrees.GetEntries()==0) 
    return 0;

  TObject *obj = 0;
  if (tn==0) {
    obj = fTrees.At(0);
  } else {
    obj = fTrees.FindObject(tn);
  }
  
  if (obj)  
    return dynamic_cast<TTree*>(obj);
  return 0;
}   

//__________________________________________________________________________________________________
Bool_t TreeWriter::IsFull() const
{
  // Check if the maximum file size has been reached.

  Long64_t entries = GetEntries();
  if (entries < 1) return kFALSE;
   
  Long64_t avgSize = GetFileSize() / entries;
   
  if (avgSize < fkMinAvgSize)
    avgSize = fkMinAvgSize;

  return (GetFileSize() + avgSize + fkMinFreeSpace) > fMaxSize;
}

//__________________________________________________________________________________________________
void TreeWriter::OpenFile()
{
  // Open the file and attach the tree.

  if (fIsInit) {
    Fatal("OpenFile", "File is already open, call CloseFile first!");
    return;
  }

  TDirectory::TContext context(0);
   
  TString pathname=GetFullName();
  gSystem->ExpandPathName(pathname);

  fFile = TFile::Open(pathname, "RECREATE");
  if (fFile == 0) {
    Fatal("OpenFile", "Could not open file %s", pathname.Data());
    return;
  }

  fFile->SetCompressionLevel(fCompressLevel);

  for (Int_t i=0;i<fTrees.GetEntries();++i) {
    MyTree *mt = static_cast<MyTree*>(fTrees.At(i));
    mt->SetDirectory(fFile);
  }

  fIsInit = kTRUE;
}

//__________________________________________________________________________________________________
void TreeWriter::Print(Option_t *option) const
{
  // Print the contents of the tree writer.

  if (option) {
    cout << ClassName() << " with members " << endl;
    cout << "   fBaseURL:       " << fBaseURL << endl; 
    cout << "   fPreFix:        " << fPrefix << endl; 
    cout << "   fFileNumber:    " << fFileNumber << endl; 
    cout << "   fCompressLevel: " << fCompressLevel << endl; 
    cout << "   fDefBrSize:     " << fDefBrSize << endl; 
    cout << "   fDefSL:         " << fDefSL << endl; 
    cout << "   fMaxSize:       " << fMaxSize << endl; 
    cout << "   fDoObjNumReset: " << fDoObjNumReset << endl;
    return;
  }

  cout << ClassName() << ": " << GetEntries() 
       << (GetEntries() == 1 ? " event" : " events") << endl;
}

//-------------------------------------------------------------------------------------------------
void TreeWriter::SetAutoFill(const char *tn, Bool_t b)
{
  // Set auto-fill mode of tree with given name.

  if (fTrees.GetEntries()==0)
    return;

  MyTree *mt = GetMyTree(tn);
  if (!mt)
    return;

  mt->SetAutoFill(b);
}


//-------------------------------------------------------------------------------------------------
void TreeWriter::SetMaxSize(Long64_t s) 
{ 
  // Set maximum file size. Check if this exceeds the ROOT file size and if, 
  // print a warning and adjust it.

  if (s>=(Long64_t)(0.99 * TTree::GetMaxTreeSize())) {
    Long64_t news = (Long64_t)(s/0.99);
    Warning("SetMaxSize", "Maximum tree size increased from %lld to %lld",
            TTree::GetMaxTreeSize(), news);
    TTree::SetMaxTreeSize(news);
  }

  fMaxSize=s; 
}

//__________________________________________________________________________________________________
void TreeWriter::StoreObject(const TObject *obj)
{
  // Store object next to tree in file. Used to store the
  // settings of how the tree was created.

  if (!fIsInit) {
    Fatal("StoreObject", "Tree is not created, call create first!");
    return;
  }

  if (!obj) {
    Fatal("StoreObject", "Ptr to TObject is null!");
    return;
  }

  fFile->WriteTObject(obj,obj->GetName(),"WriteDelete");
}
Revision:	1.5
Committed:	Tue Jun 17 08:22:41 2008 UTC (16 years, 10 months ago) by loizides
Content type:	text/plain
Branch:	MAIN
Changes since 1.4:	+34 -17 lines
Log Message:	Adjust max tree size if requested max size is larger.
#	Content
1	// $Id: TreeWriter.cc,v 1.4 2008/06/09 11:47:03 paus Exp $
2
3	#include "MitAna/DataUtil/interface/TreeWriter.h"
4
5	#include <Riostream.h>
6	#include <TObject.h>
7	#include <TSystem.h>
8	#include <TProcessID.h>
9
10	#include "MitAna/DataUtil/interface/Debug.h"
11
12	using namespace mithep;
13
14	ClassImp(mithep::TreeWriter)
15
16	//__________________________________________________________________________________________________
17	TreeWriter::TreeWriter(const char *tname, Bool_t doreset) :
18	TNamed(tname,Form("%s written by mithep::TreeWriter", tname)),
19	fBaseURL("."),
20	fPrefix("mithep"),
21	fFileNumber(0),
22	fCompressLevel(9),
23	fDefBrSize(64*1024),
24	fDefSL(99),
25	fMaxSize((Long64_t)(0.99 * TTree::GetMaxTreeSize())),
26	fkMinFreeSpace(1024*1024),
27	fkMinAvgSize(10*1024),
28	fEvtObjNum(-1),
29	fIsInit(kFALSE),
30	fDoObjNumReset(doreset),
31	fFile(0),
32	fTrees(0)
33	{
34	// Constructor.
35
36	fTrees.SetOwner();
37	}
38
39	//__________________________________________________________________________________________________
40	TreeWriter::~TreeWriter()
41	{
42	// Destructor.
43
44	if (fIsInit) {
45	CloseFile();
46	}
47
48	TDirectory::TContext context(0);
49	fTrees.Clear();
50	}
51
52	//__________________________________________________________________________________________________
53	void TreeWriter::AddBranch(const char name, const char cname,
54	void *obj, Int_t bsize, Int_t level)
55	{
56	// Add branch with name "name" into tree with name "tname" and set its address
57	// to object pointer for class name "cname" using a given buffer size and splitlevel.
58
59	MyTree *t = AddOrGetMyTree(GetName());
60	t->Bronch(name, cname, obj, bsize, level);
61	}
62
63
64	//__________________________________________________________________________________________________
65	void TreeWriter::AddBranch(const char name, void obj, Int_t bsize, Int_t level)
66	{
67	// Add branch with name "name" into tree with name "tname" and set its address
68	// to object pointer using a given buffer size and splitlevel.
69
70	AddBranch(name, CName(obj), obj, bsize, level);
71	}
72
73	//__________________________________________________________________________________________________
74	void TreeWriter::AddBranch(const char name, const char cname,
75	void *obj, Int_t bsize)
76	{
77	// Add branch with name "name" into tree with name "tname" and set its address
78	// to object pointer for class name "cname" using a given buffer size and default splitlevel.
79
80	MyTree *t = AddOrGetMyTree(GetName());
81	t->Bronch(name, cname, obj, bsize, fDefSL);
82	}
83
84	//__________________________________________________________________________________________________
85	void TreeWriter::AddBranch(const char name, void obj, Int_t bsize)
86	{
87	// Add branch with name "name" into tree with name "tname" and set its address
88	// to object pointer using a given buffer size and default splitlevel.
89
90	AddBranch(name, CName(obj), obj, bsize);
91	}
92
93	//__________________________________________________________________________________________________
94	void TreeWriter::AddBranch(const char name, const char cname,
95	void *obj)
96	{
97	// Add branch with name "name" into tree with name "tname" and set its address
98	// to object pointer for class name "cname" using a default buffer size and splitlevel.
99
100	MyTree *t = AddOrGetMyTree(GetName());
101	t->Bronch(name, cname, obj, fDefBrSize, fDefSL);
102	}
103
104	//__________________________________________________________________________________________________
105	void TreeWriter::AddBranch(const char name, void obj)
106	{
107	// Add branch with name "name" into tree with name "tname" and set its address
108	// to object pointer using a default buffer size and splitlevel.
109
110	AddBranch(name, CName(obj), obj);
111	}
112
113	//__________________________________________________________________________________________________
114	void TreeWriter::AddBranchToTree(const char tname, const char name, const char *cname,
115	void *obj, Int_t bsize, Int_t level)
116	{
117	// Add branch with name "name" into tree with name "tname" and set its address
118	// to object pointer for class name "cname" using a given buffer size and splitlevel.
119
120	MyTree *t = AddOrGetMyTree(tname);
121	t->Bronch(name, cname, obj, bsize, level);
122	}
123
124	//__________________________________________________________________________________________________
125	void TreeWriter::AddBranchToTree(const char tname, const char name, void *obj,
126	Int_t bsize, Int_t level)
127	{
128	// Add branch with name "name" into tree with name "tname" and set its address
129	// to object pointer using a given buffer size and splitlevel.
130
131	AddBranchToTree(tname, name, CName(obj), obj, bsize, level);
132	}
133
134	//__________________________________________________________________________________________________
135	void TreeWriter::AddBranchToTree(const char tname, const char name, const char *cname,
136	void *obj, Int_t bsize)
137	{
138	// Add branch with name "name" into tree with name "tname" and set its address
139	// to object pointer for class name "cname" using a given buffer size and default splitlevel.
140
141	MyTree *t = AddOrGetMyTree(tname);
142	t->Bronch(name, cname, obj, bsize, fDefSL);
143	}
144
145	//__________________________________________________________________________________________________
146	void TreeWriter::AddBranchToTree(const char tname, const char name, void *obj,
147	Int_t bsize)
148	{
149	// Add branch with name "name" into tree with name "tname" and set its address
150	// to object pointer using a given buffer size and default splitlevel.
151
152	AddBranchToTree(tname, name, CName(obj), obj, bsize);
153	}
154
155	//__________________________________________________________________________________________________
156	void TreeWriter::AddBranchToTree(const char tname, const char name, const char *cname,
157	void *obj)
158	{
159	// Add branch with name "name" into tree with name "tname" and set its address
160	// to object pointer for class name "cname" using a default buffer size and splitlevel.
161
162	MyTree *t = AddOrGetMyTree(tname);
163	t->Bronch(name, cname, obj, fDefBrSize, fDefSL);
164	}
165
166	//__________________________________________________________________________________________________
167	void TreeWriter::AddBranchToTree(const char tname, const char name, void *obj)
168	{
169	// Add branch with name "name" into tree with name "tname" and set its address
170	// to object pointer for class name "cname" using a default buffer size and splitlevel.
171
172	AddBranchToTree(tname, name, CName(obj), obj);
173	}
174
175	//__________________________________________________________________________________________________
176	MyTree TreeWriter::AddOrGetMyTree(const char tn)
177	{
178	// Add new tree if not present in array of trees or return
179	// present tree.
180
181	MyTree tree = dynamic_cast<MyTree>(fTrees.FindObject(tn));
182	if (tree)
183	return tree;
184
185	TDirectory::TContext context(fFile);
186	tree = new MyTree(tn, tn);
187	tree->SetDirectory(fFile);
188	fTrees.AddLast(tree);
189	return tree;
190	}
191
192	//__________________________________________________________________________________________________
193	Bool_t TreeWriter::BeginEvent(Bool_t doreset)
194	{
195	// Prepare for the next event. If doreset or fDoObjNumReset is kTRUE
196	// store the current object number to be reset in FillEvent().
197
198	if (!fIsInit) {
199	OpenFile();
200	}
201
202	if (doreset \|\| fDoObjNumReset) {
203	fEvtObjNum = TProcessID::GetObjectCount();
204	}
205
206	return kTRUE;
207	}
208
209	//__________________________________________________________________________________________________
210	void TreeWriter::CloseFile()
211	{
212	// Write tree(s) and close file.
213
214	if (!fIsInit) {
215	Fatal("CloseFile", "File was not opened, call OpenFile() first!");
216	return;
217	}
218
219	TDirectory::TContext context(fFile); // cd fFile &&
220	// automatically restore gDirectory
221
222	for (Int_t i=0;i<fTrees.GetEntries();++i) {
223	MyTree mt = static_cast<MyTree>(fTrees.At(i));
224	mt->Write(mt->GetName(),TObject::kOverwrite);
225	mt->Reset();
226	mt->SetDirectory(0);
227	}
228
229	fFile->Close();
230	delete fFile;
231	fFile = 0;
232
233	fIsInit = kFALSE;
234	fFileNumber++;
235	}
236
237	//__________________________________________________________________________________________________
238	const char TreeWriter::CName(void obj) const
239	{
240	// Dereference void* pointer into TObject* pointer
241
242	TObject tobj = dynamic_cast<TObject>((TObject*)obj);
243	if (tobj==0) {
244	Fatal("ClassName", "Given void* ptr can not be dereferenced into TObject*");
245	}
246	return tobj->ClassName();
247	}
248
249	//__________________________________________________________________________________________________
250	Bool_t TreeWriter::EndEvent(Bool_t doreset)
251	{
252	// Store the event in the tree. If doreset or fDoObjNumReset is kTRUE
253	// restore the stored object number at the time BeginEvent(kTRUE)
254	// was called.
255
256	if (!fIsInit) {
257	Fatal("EndEvent", "File is not open, did you call BeginEvent?");
258	return kFALSE;
259	}
260
261	Int_t r = 0;
262	for (Int_t i=0;i<fTrees.GetEntries();++i) {
263	MyTree mt = static_cast<MyTree>(fTrees.At(i));
264	if (mt->GetAutoFill()==0)
265	continue;
266	r += mt->Fill();
267	}
268
269	if (IsFull())
270	CloseFile();
271
272	if (doreset \|\| fDoObjNumReset) {
273	if (fEvtObjNum<0) {
274	Error("EndEvent", "Object counter is zero. Did you call BeginEvent(kTRUE)?");
275	} else {
276	// Reset the TRef table. keep it from growing with each event (see doc)
277	TProcessID::SetObjectCount(fEvtObjNum);
278	}
279	}
280
281	return (r >= 0);
282	}
283
284	//-------------------------------------------------------------------------------------------------
285	Long64_t TreeWriter::GetEntries(const char *tn) const
286	{
287	//
288
289	if (fTrees.GetEntries()==0) return -1;
290
291	if (tn) {
292	const TTree *mt=GetTree(tn);
293	if (mt)
294	return mt->GetEntries();
295	else
296	return -1;
297	}
298
299	Long64_t ret = 0;
300	for (Int_t i=0;i<fTrees.GetEntries();++i) {
301	const MyTree mt = static_cast<const MyTree>(fTrees.At(i));
302	ret += mt->GetEntries();
303	}
304	return ret;
305	}
306
307	//-------------------------------------------------------------------------------------------------
308	MyTree mithep::TreeWriter::GetMyTree(const char tn)
309	{
310	// Return MyTree with given name from array.
311
312	if (fTrees.GetEntries()==0)
313	return 0;
314
315	TObject *obj = 0;
316	if (tn==0) {
317	obj = fTrees.At(0);
318	} else {
319	obj = fTrees.FindObject(tn);
320	}
321
322	if (obj)
323	return static_cast<MyTree*>(obj);
324	return 0;
325	}
326
327	//-------------------------------------------------------------------------------------------------
328	const TTree mithep::TreeWriter::GetTree(const char tn) const
329	{
330	// Return TTree with given name from array.
331
332	if (fTrees.GetEntries()==0)
333	return 0;
334
335	TObject *obj = 0;
336	if (tn==0) {
337	obj = fTrees.At(0);
338	} else {
339	obj = fTrees.FindObject(tn);
340	}
341
342	if (obj)
343	return dynamic_cast<const TTree*>(obj);
344	return 0;
345	}
346
347	//-------------------------------------------------------------------------------------------------
348	TTree mithep::TreeWriter::GetTree(const char tn)
349	{
350	// Return TTree with given name from array.
351
352	if (fTrees.GetEntries()==0)
353	return 0;
354
355	TObject *obj = 0;
356	if (tn==0) {
357	obj = fTrees.At(0);
358	} else {
359	obj = fTrees.FindObject(tn);
360	}
361
362	if (obj)
363	return dynamic_cast<TTree*>(obj);
364	return 0;
365	}
366
367	//__________________________________________________________________________________________________
368	Bool_t TreeWriter::IsFull() const
369	{
370	// Check if the maximum file size has been reached.
371
372	Long64_t entries = GetEntries();
373	if (entries < 1) return kFALSE;
374
375	Long64_t avgSize = GetFileSize() / entries;
376
377	if (avgSize < fkMinAvgSize)
378	avgSize = fkMinAvgSize;
379
380	return (GetFileSize() + avgSize + fkMinFreeSpace) > fMaxSize;
381	}
382
383	//__________________________________________________________________________________________________
384	void TreeWriter::OpenFile()
385	{
386	// Open the file and attach the tree.
387
388	if (fIsInit) {
389	Fatal("OpenFile", "File is already open, call CloseFile first!");
390	return;
391	}
392
393	TDirectory::TContext context(0);
394
395	TString pathname=GetFullName();
396	gSystem->ExpandPathName(pathname);
397
398	fFile = TFile::Open(pathname, "RECREATE");
399	if (fFile == 0) {
400	Fatal("OpenFile", "Could not open file %s", pathname.Data());
401	return;
402	}
403
404	fFile->SetCompressionLevel(fCompressLevel);
405
406	for (Int_t i=0;i<fTrees.GetEntries();++i) {
407	MyTree mt = static_cast<MyTree>(fTrees.At(i));
408	mt->SetDirectory(fFile);
409	}
410
411	fIsInit = kTRUE;
412	}
413
414	//__________________________________________________________________________________________________
415	void TreeWriter::Print(Option_t *option) const
416	{
417	// Print the contents of the tree writer.
418
419	if (option) {
420	cout << ClassName() << " with members " << endl;
421	cout << " fBaseURL: " << fBaseURL << endl;
422	cout << " fPreFix: " << fPrefix << endl;
423	cout << " fFileNumber: " << fFileNumber << endl;
424	cout << " fCompressLevel: " << fCompressLevel << endl;
425	cout << " fDefBrSize: " << fDefBrSize << endl;
426	cout << " fDefSL: " << fDefSL << endl;
427	cout << " fMaxSize: " << fMaxSize << endl;
428	cout << " fDoObjNumReset: " << fDoObjNumReset << endl;
429	return;
430	}
431
432	cout << ClassName() << ": " << GetEntries()
433	<< (GetEntries() == 1 ? " event" : " events") << endl;
434	}
435
436	//-------------------------------------------------------------------------------------------------
437	void TreeWriter::SetAutoFill(const char *tn, Bool_t b)
438	{
439	// Set auto-fill mode of tree with given name.
440
441	if (fTrees.GetEntries()==0)
442	return;
443
444	MyTree *mt = GetMyTree(tn);
445	if (!mt)
446	return;
447
448	mt->SetAutoFill(b);
449	}
450
451
452	//-------------------------------------------------------------------------------------------------
453	void TreeWriter::SetMaxSize(Long64_t s)
454	{
455	// Set maximum file size. Check if this exceeds the ROOT file size and if,
456	// print a warning and adjust it.
457
458	if (s>=(Long64_t)(0.99 * TTree::GetMaxTreeSize())) {
459	Long64_t news = (Long64_t)(s/0.99);
460	Warning("SetMaxSize", "Maximum tree size increased from %lld to %lld",
461	TTree::GetMaxTreeSize(), news);
462	TTree::SetMaxTreeSize(news);
463	}
464
465	fMaxSize=s;
466	}
467
468	//__________________________________________________________________________________________________
469	void TreeWriter::StoreObject(const TObject *obj)
470	{
471	// Store object next to tree in file. Used to store the
472	// settings of how the tree was created.
473
474	if (!fIsInit) {
475	Fatal("StoreObject", "Tree is not created, call create first!");
476	return;
477	}
478
479	if (!obj) {
480	Fatal("StoreObject", "Ptr to TObject is null!");
481	return;
482	}
483
484	fFile->WriteTObject(obj,obj->GetName(),"WriteDelete");
485	}