DataUtil/src/TreeWriter.cc

// $Id: TreeWriter.cc,v 1.11 2008/09/27 06:14:05 loizides Exp $

#include "MitAna/DataUtil/interface/TreeWriter.h"
#include <Riostream.h>
#include <TObject.h>
#include <TSystem.h>
#include <TProcessID.h>
#include <TBranchRef.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), 
  fDoBranchRef(0), 
  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());
  TBranch *b = t->Bronch(name, cname, obj, bsize, level);
  b->SetCompressionLevel(GetCompressLevel());
}


//--------------------------------------------------------------------------------------------------
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());
  TBranch *b = t->Bronch(name, cname, obj, bsize, fDefSL);
  b->SetCompressionLevel(GetCompressLevel());
}

//--------------------------------------------------------------------------------------------------
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());
  TBranch *b = t->Bronch(name, cname, obj, fDefBrSize, fDefSL);
  b->SetCompressionLevel(GetCompressLevel());
}

//--------------------------------------------------------------------------------------------------
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);
  TBranch *b = t->Bronch(name, cname, obj, bsize, level);
  b->SetCompressionLevel(GetCompressLevel());
}

//--------------------------------------------------------------------------------------------------
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);
  TBranch *b = t->Bronch(name, cname, obj, bsize, fDefSL);
  b->SetCompressionLevel(GetCompressLevel());
}

//--------------------------------------------------------------------------------------------------
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);
  TBranch *b = t->Bronch(name, cname, obj, fDefBrSize, fDefSL);
  b->SetCompressionLevel(GetCompressLevel());
}

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

  TDirectory::TContext context(fFile); 
  tree = new MyTree(tn, tn);
  tree->SetDirectory(fFile);
  if (fDoBranchRef)
    tree->BranchRef();
  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);

    // backup and restore list of branch pointers from TRefTable (needed for autoloading)
    if (mt->GetBranchRef()) {
      TObjArray *parents = mt->GetBranchRef()->GetRefTable()->GetParents();
      TObjArray parentsBak(*parents);
      mt->Reset();
      for (Int_t j=0; j<parentsBak.GetEntries(); ++j)
        parents->Add(parentsBak.At(j));
    }
    else
      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
{ 
  // Return entries of tree with given name. If no tree is given, return sum of entries
  // of all trees.

   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:	1.12
Committed:	Mon Oct 6 16:53:26 2008 UTC (16 years, 7 months ago) by loizides
Content type:	text/plain
Branch:	MAIN
CVS Tags:	Mit_006, Mit_005
Changes since 1.11:	+6 -4 lines
Log Message:	Add do BranchRef and GetTree
#	Content
1	// $Id: TreeWriter.cc,v 1.11 2008/09/27 06:14:05 loizides Exp $
2
3	#include "MitAna/DataUtil/interface/TreeWriter.h"
4	#include <Riostream.h>
5	#include <TObject.h>
6	#include <TSystem.h>
7	#include <TProcessID.h>
8	#include <TBranchRef.h>
9	#include "MitAna/DataUtil/interface/Debug.h"
10
11	using namespace mithep;
12
13	ClassImp(mithep::TreeWriter)
14
15	//__________________________________________________________________________________________________
16	TreeWriter::TreeWriter(const char *tname, Bool_t doreset) :
17	TNamed(tname,Form("%s written by mithep::TreeWriter", tname)),
18	fBaseURL("."),
19	fPrefix("mithep"),
20	fFileNumber(0),
21	fCompressLevel(9),
22	fDefBrSize(64*1024),
23	fDefSL(99),
24	fMaxSize((Long64_t)(0.99 * TTree::GetMaxTreeSize())),
25	fkMinFreeSpace(1024*1024),
26	fkMinAvgSize(10*1024),
27	fEvtObjNum(-1),
28	fIsInit(kFALSE),
29	fDoObjNumReset(doreset),
30	fDoBranchRef(0),
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	TBranch *b = t->Bronch(name, cname, obj, bsize, level);
61	b->SetCompressionLevel(GetCompressLevel());
62	}
63
64
65	//--------------------------------------------------------------------------------------------------
66	void TreeWriter::AddBranch(const char name, void obj, Int_t bsize, Int_t level)
67	{
68	// Add branch with name "name" into tree with name "tname" and set its address
69	// to object pointer using a given buffer size and splitlevel.
70
71	AddBranch(name, CName(obj), obj, bsize, level);
72	}
73
74	//--------------------------------------------------------------------------------------------------
75	void TreeWriter::AddBranch(const char name, const char cname,
76	void *obj, Int_t bsize)
77	{
78	// Add branch with name "name" into tree with name "tname" and set its address
79	// to object pointer for class name "cname" using a given buffer size and default splitlevel.
80
81	MyTree *t = AddOrGetMyTree(GetName());
82	TBranch *b = t->Bronch(name, cname, obj, bsize, fDefSL);
83	b->SetCompressionLevel(GetCompressLevel());
84	}
85
86	//--------------------------------------------------------------------------------------------------
87	void TreeWriter::AddBranch(const char name, void obj, Int_t bsize)
88	{
89	// Add branch with name "name" into tree with name "tname" and set its address
90	// to object pointer using a given buffer size and default splitlevel.
91
92	AddBranch(name, CName(obj), obj, bsize);
93	}
94
95	//--------------------------------------------------------------------------------------------------
96	void TreeWriter::AddBranch(const char name, const char cname,
97	void *obj)
98	{
99	// Add branch with name "name" into tree with name "tname" and set its address
100	// to object pointer for class name "cname" using a default buffer size and splitlevel.
101
102	MyTree *t = AddOrGetMyTree(GetName());
103	TBranch *b = t->Bronch(name, cname, obj, fDefBrSize, fDefSL);
104	b->SetCompressionLevel(GetCompressLevel());
105	}
106
107	//--------------------------------------------------------------------------------------------------
108	void TreeWriter::AddBranch(const char name, void obj)
109	{
110	// Add branch with name "name" into tree with name "tname" and set its address
111	// to object pointer using a default buffer size and splitlevel.
112
113	AddBranch(name, CName(obj), obj);
114	}
115
116	//--------------------------------------------------------------------------------------------------
117	void TreeWriter::AddBranchToTree(const char tname, const char name, const char *cname,
118	void *obj, Int_t bsize, Int_t level)
119	{
120	// Add branch with name "name" into tree with name "tname" and set its address
121	// to object pointer for class name "cname" using a given buffer size and splitlevel.
122
123	MyTree *t = AddOrGetMyTree(tname);
124	TBranch *b = t->Bronch(name, cname, obj, bsize, level);
125	b->SetCompressionLevel(GetCompressLevel());
126	}
127
128	//--------------------------------------------------------------------------------------------------
129	void TreeWriter::AddBranchToTree(const char tname, const char name, void *obj,
130	Int_t bsize, Int_t level)
131	{
132	// Add branch with name "name" into tree with name "tname" and set its address
133	// to object pointer using a given buffer size and splitlevel.
134
135	AddBranchToTree(tname, name, CName(obj), obj, bsize, level);
136	}
137
138	//--------------------------------------------------------------------------------------------------
139	void TreeWriter::AddBranchToTree(const char tname, const char name, const char *cname,
140	void *obj, Int_t bsize)
141	{
142	// Add branch with name "name" into tree with name "tname" and set its address
143	// to object pointer for class name "cname" using a given buffer size and default splitlevel.
144
145	MyTree *t = AddOrGetMyTree(tname);
146	TBranch *b = t->Bronch(name, cname, obj, bsize, fDefSL);
147	b->SetCompressionLevel(GetCompressLevel());
148	}
149
150	//--------------------------------------------------------------------------------------------------
151	void TreeWriter::AddBranchToTree(const char tname, const char name, void *obj,
152	Int_t bsize)
153	{
154	// Add branch with name "name" into tree with name "tname" and set its address
155	// to object pointer using a given buffer size and default splitlevel.
156
157	AddBranchToTree(tname, name, CName(obj), obj, bsize);
158	}
159
160	//--------------------------------------------------------------------------------------------------
161	void TreeWriter::AddBranchToTree(const char tname, const char name, const char *cname,
162	void *obj)
163	{
164	// Add branch with name "name" into tree with name "tname" and set its address
165	// to object pointer for class name "cname" using a default buffer size and splitlevel.
166
167	MyTree *t = AddOrGetMyTree(tname);
168	TBranch *b = t->Bronch(name, cname, obj, fDefBrSize, fDefSL);
169	b->SetCompressionLevel(GetCompressLevel());
170	}
171
172	//--------------------------------------------------------------------------------------------------
173	void TreeWriter::AddBranchToTree(const char tname, const char name, void *obj)
174	{
175	// Add branch with name "name" into tree with name "tname" and set its address
176	// to object pointer for class name "cname" using a default buffer size and splitlevel.
177
178	AddBranchToTree(tname, name, CName(obj), obj);
179	}
180
181	//--------------------------------------------------------------------------------------------------
182	MyTree TreeWriter::AddOrGetMyTree(const char tn)
183	{
184	// Add new tree if not present in array of trees or return
185	// present tree.
186
187	MyTree tree = GetMyTree(tn); //dynamic_cast<MyTree>(fTrees.FindObject(tn));
188	if (tree)
189	return tree;
190
191	TDirectory::TContext context(fFile);
192	tree = new MyTree(tn, tn);
193	tree->SetDirectory(fFile);
194	if (fDoBranchRef)
195	tree->BranchRef();
196	fTrees.AddLast(tree);
197	return tree;
198	}
199
200	//--------------------------------------------------------------------------------------------------
201	Bool_t TreeWriter::BeginEvent(Bool_t doreset)
202	{
203	// Prepare for the next event. If doreset or fDoObjNumReset is kTRUE
204	// store the current object number to be reset in FillEvent().
205
206	if (!fIsInit) {
207	OpenFile();
208	}
209
210	if (doreset \|\| fDoObjNumReset) {
211	fEvtObjNum = TProcessID::GetObjectCount();
212	}
213
214	return kTRUE;
215	}
216
217	//--------------------------------------------------------------------------------------------------
218	void TreeWriter::CloseFile()
219	{
220	// Write tree(s) and close file.
221
222	if (!fIsInit) {
223	Fatal("CloseFile", "File was not opened, call OpenFile() first!");
224	return;
225	}
226
227	TDirectory::TContext context(fFile); // cd fFile &&
228	// automatically restore gDirectory
229
230	for (Int_t i=0;i<fTrees.GetEntries();++i) {
231	MyTree mt = static_cast<MyTree>(fTrees.At(i));
232	mt->Write(mt->GetName(),TObject::kOverwrite);
233
234	// backup and restore list of branch pointers from TRefTable (needed for autoloading)
235	if (mt->GetBranchRef()) {
236	TObjArray *parents = mt->GetBranchRef()->GetRefTable()->GetParents();
237	TObjArray parentsBak(*parents);
238	mt->Reset();
239	for (Int_t j=0; j<parentsBak.GetEntries(); ++j)
240	parents->Add(parentsBak.At(j));
241	}
242	else
243	mt->Reset();
244	mt->SetDirectory(0);
245	}
246
247	fFile->Close();
248	delete fFile;
249	fFile = 0;
250
251	fIsInit = kFALSE;
252	fFileNumber++;
253	}
254
255	//--------------------------------------------------------------------------------------------------
256	const char TreeWriter::CName(void obj) const
257	{
258	// Dereference void* pointer into TObject* pointer
259
260	TObject tobj = dynamic_cast<TObject>((TObject*)obj);
261	if (tobj==0) {
262	Fatal("ClassName", "Given void* ptr can not be dereferenced into TObject*");
263	}
264	return tobj->ClassName();
265	}
266
267	//--------------------------------------------------------------------------------------------------
268	Bool_t TreeWriter::EndEvent(Bool_t doreset)
269	{
270	// Store the event in the tree. If doreset or fDoObjNumReset is kTRUE
271	// restore the stored object number at the time BeginEvent(kTRUE)
272	// was called.
273
274	if (!fIsInit) {
275	Fatal("EndEvent", "File is not open, did you call BeginEvent?");
276	return kFALSE;
277	}
278
279	Int_t r = 0;
280	for (Int_t i=0;i<fTrees.GetEntries();++i) {
281	MyTree mt = static_cast<MyTree>(fTrees.At(i));
282	if (mt->GetAutoFill()==0)
283	continue;
284	r += mt->Fill();
285	}
286
287	if (IsFull())
288	CloseFile();
289
290	if (doreset \|\| fDoObjNumReset) {
291	if (fEvtObjNum<0) {
292	Error("EndEvent", "Object counter is zero. Did you call BeginEvent(kTRUE)?");
293	} else {
294	// Reset the TRef table. Keep it from growing with each event (see doc)
295	TProcessID::SetObjectCount(fEvtObjNum);
296	}
297	}
298
299	return (r >= 0);
300	}
301
302	//--------------------------------------------------------------------------------------------------
303	Long64_t TreeWriter::GetEntries(const char *tn) const
304	{
305	// Return entries of tree with given name. If no tree is given, return sum of entries
306	// of all trees.
307
308	if (fTrees.GetEntries()==0) return -1;
309
310	if (tn) {
311	const TTree *mt=GetTree(tn);
312	if (mt)
313	return mt->GetEntries();
314	else
315	return -1;
316	}
317
318	Long64_t ret = 0;
319	for (Int_t i=0;i<fTrees.GetEntries();++i) {
320	const MyTree mt = static_cast<const MyTree>(fTrees.At(i));
321	ret += mt->GetEntries();
322	}
323	return ret;
324	}
325
326	//--------------------------------------------------------------------------------------------------
327	MyTree mithep::TreeWriter::GetMyTree(const char tn)
328	{
329	// Return MyTree with given name from array.
330
331	if (fTrees.GetEntries()==0)
332	return 0;
333
334	TObject *obj = 0;
335	if (tn==0) {
336	obj = fTrees.At(0);
337	} else {
338	obj = fTrees.FindObject(tn);
339	}
340
341	if (obj)
342	return static_cast<MyTree*>(obj);
343	return 0;
344	}
345
346	//--------------------------------------------------------------------------------------------------
347	const TTree mithep::TreeWriter::GetTree(const char tn) const
348	{
349	// Return TTree with given name from array.
350
351	if (fTrees.GetEntries()==0)
352	return 0;
353
354	TObject *obj = 0;
355	if (tn==0) {
356	obj = fTrees.At(0);
357	} else {
358	obj = fTrees.FindObject(tn);
359	}
360
361	if (obj)
362	return dynamic_cast<const TTree*>(obj);
363	return 0;
364	}
365
366	//--------------------------------------------------------------------------------------------------
367	TTree mithep::TreeWriter::GetTree(const char tn)
368	{
369	// Return TTree with given name from array.
370
371	if (fTrees.GetEntries()==0)
372	return 0;
373
374	TObject *obj = 0;
375	if (tn==0) {
376	obj = fTrees.At(0);
377	} else {
378	obj = fTrees.FindObject(tn);
379	}
380
381	if (obj)
382	return dynamic_cast<TTree*>(obj);
383	return 0;
384	}
385
386	//--------------------------------------------------------------------------------------------------
387	Bool_t TreeWriter::IsFull() const
388	{
389	// Check if the maximum file size has been reached.
390
391	Long64_t entries = GetEntries();
392	if (entries < 1) return kFALSE;
393
394	Long64_t avgSize = GetFileSize() / entries;
395
396	if (avgSize < fkMinAvgSize)
397	avgSize = fkMinAvgSize;
398
399	return (GetFileSize() + avgSize + fkMinFreeSpace) > fMaxSize;
400	}
401
402	//--------------------------------------------------------------------------------------------------
403	void TreeWriter::OpenFile()
404	{
405	// Open the file and attach the tree.
406
407	if (fIsInit) {
408	Fatal("OpenFile", "File is already open, call CloseFile first!");
409	return;
410	}
411
412	TDirectory::TContext context(0);
413
414	TString pathname=GetFullName();
415	gSystem->ExpandPathName(pathname);
416
417	fFile = TFile::Open(pathname, "RECREATE");
418	if (fFile == 0) {
419	Fatal("OpenFile", "Could not open file %s", pathname.Data());
420	return;
421	}
422
423	fFile->SetCompressionLevel(fCompressLevel);
424
425	for (Int_t i=0;i<fTrees.GetEntries();++i) {
426	MyTree mt = static_cast<MyTree>(fTrees.At(i));
427	mt->SetDirectory(fFile);
428	}
429
430	fIsInit = kTRUE;
431	}
432
433	//--------------------------------------------------------------------------------------------------
434	void TreeWriter::Print(Option_t *option) const
435	{
436	// Print the contents of the tree writer.
437
438	if (option) {
439	cout << ClassName() << " with members " << endl;
440	cout << " fBaseURL: " << fBaseURL << endl;
441	cout << " fPreFix: " << fPrefix << endl;
442	cout << " fFileNumber: " << fFileNumber << endl;
443	cout << " fCompressLevel: " << fCompressLevel << endl;
444	cout << " fDefBrSize: " << fDefBrSize << endl;
445	cout << " fDefSL: " << fDefSL << endl;
446	cout << " fMaxSize: " << fMaxSize << endl;
447	cout << " fDoObjNumReset: " << fDoObjNumReset << endl;
448	return;
449	}
450
451	cout << ClassName() << ": " << GetEntries()
452	<< (GetEntries() == 1 ? " event" : " events") << endl;
453	}
454
455	//--------------------------------------------------------------------------------------------------
456	void TreeWriter::SetAutoFill(const char *tn, Bool_t b)
457	{
458	// Set auto-fill mode of tree with given name.
459
460	if (fTrees.GetEntries()==0)
461	return;
462
463	MyTree *mt = GetMyTree(tn);
464	if (!mt)
465	return;
466
467	mt->SetAutoFill(b);
468	}
469
470	//--------------------------------------------------------------------------------------------------
471	void TreeWriter::SetMaxSize(Long64_t s)
472	{
473	// Set maximum file size. Check if this exceeds the ROOT file size and if,
474	// print a warning and adjust it.
475
476	if (s>=(Long64_t)(0.99 * TTree::GetMaxTreeSize())) {
477	Long64_t news = (Long64_t)(s/0.99);
478	Warning("SetMaxSize", "Maximum tree size increased from %lld to %lld",
479	TTree::GetMaxTreeSize(), news);
480	TTree::SetMaxTreeSize(news);
481	}
482
483	fMaxSize=s;
484	}
485
486	//--------------------------------------------------------------------------------------------------
487	void TreeWriter::StoreObject(const TObject *obj)
488	{
489	// Store object next to tree in file. Used to store the
490	// settings of how the tree was created.
491
492	if (!fIsInit) {
493	Fatal("StoreObject", "Tree is not created, call create first!");
494	return;
495	}
496
497	if (!obj) {
498	Fatal("StoreObject", "Ptr to TObject is null!");
499	return;
500	}
501
502	fFile->WriteTObject(obj,obj->GetName(),"WriteDelete");
503	}