DataUtil/src/TreeWriter.cc

// $Id: TreeWriter.cc,v 1.12 2008/10/06 16:53:26 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.
   
  Terminate();
}

//__________________________________________________________________________________________________
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);
}

//--------------------------------------------------------------------------------------------------
void TreeWriter::AddTree(const char *tname)
{
  // Add tree with name "name" into tree with name "tname".

  AddOrGetMyTree(tname);
}

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

  MyTree *tree = GetMyTree(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("CName", "Given void* ptr can not be dereferenced into TObject*");
  }
  return tobj->ClassName();
}

//--------------------------------------------------------------------------------------------------
void TreeWriter::DoBranchRef(const char *tn)
{
  // Fill BranchRef for given tree.

  if (fTrees.GetEntries()==0) {
    Error("DoBranchRef", "Tree with name %s not found!", tn); 
    return;
  }

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

  mt->BranchRef();
}

//--------------------------------------------------------------------------------------------------
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");
}

//__________________________________________________________________________________________________
void TreeWriter::Terminate()
{
  // Terminate tree file writing.
   
  if (fIsInit) {
    CloseFile();
  }

  TDirectory::TContext context(0); 
  fTrees.Clear();
}
Revision:	1.13
Committed:	Mon Dec 1 17:39:20 2008 UTC (16 years, 5 months ago) by loizides
Content type:	text/plain
Branch:	MAIN
CVS Tags:	Mit_006b, Mit_006a
Changes since 1.12:	+42 -9 lines
Log Message:	Added AddTree and DoBranchRef
#	User	Rev	Content
1	loizides	1.13	// $Id: TreeWriter.cc,v 1.12 2008/10/06 16:53:26 loizides Exp $
2	loizides	1.1
3			#include "MitAna/DataUtil/interface/TreeWriter.h"
4			#include <Riostream.h>
5			#include <TObject.h>
6			#include <TSystem.h>
7			#include <TProcessID.h>
8	bendavid	1.10	#include <TBranchRef.h>
9	loizides	1.3	#include "MitAna/DataUtil/interface/Debug.h"
10
11	loizides	1.1	using namespace mithep;
12
13			ClassImp(mithep::TreeWriter)
14
15			//__________________________________________________________________________________________________
16	loizides	1.5	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	loizides	1.12	fDoBranchRef(0),
31	loizides	1.5	fFile(0),
32			fTrees(0)
33	loizides	1.1	{
34			// Constructor.
35
36	loizides	1.2	fTrees.SetOwner();
37	loizides	1.1	}
38
39			//__________________________________________________________________________________________________
40			TreeWriter::~TreeWriter()
41			{
42			// Destructor.
43
44	loizides	1.13	Terminate();
45	loizides	1.2	}
46
47			//__________________________________________________________________________________________________
48			void TreeWriter::AddBranch(const char name, const char cname,
49			void *obj, Int_t bsize, Int_t level)
50			{
51			// Add branch with name "name" into tree with name "tname" and set its address
52			// to object pointer for class name "cname" using a given buffer size and splitlevel.
53
54	loizides	1.7	MyTree *t = AddOrGetMyTree(GetName());
55			TBranch *b = t->Bronch(name, cname, obj, bsize, level);
56			b->SetCompressionLevel(GetCompressLevel());
57	loizides	1.1	}
58
59	loizides	1.3
60	loizides	1.9	//--------------------------------------------------------------------------------------------------
61	loizides	1.3	void TreeWriter::AddBranch(const char name, void obj, Int_t bsize, Int_t level)
62			{
63			// Add branch with name "name" into tree with name "tname" and set its address
64			// to object pointer using a given buffer size and splitlevel.
65
66			AddBranch(name, CName(obj), obj, bsize, level);
67			}
68
69	loizides	1.9	//--------------------------------------------------------------------------------------------------
70	loizides	1.2	void TreeWriter::AddBranch(const char name, const char cname,
71			void *obj, Int_t bsize)
72	loizides	1.1	{
73	loizides	1.2	// Add branch with name "name" into tree with name "tname" and set its address
74			// to object pointer for class name "cname" using a given buffer size and default splitlevel.
75	loizides	1.1
76	loizides	1.7	MyTree *t = AddOrGetMyTree(GetName());
77			TBranch *b = t->Bronch(name, cname, obj, bsize, fDefSL);
78			b->SetCompressionLevel(GetCompressLevel());
79	loizides	1.1	}
80
81	loizides	1.9	//--------------------------------------------------------------------------------------------------
82	loizides	1.3	void TreeWriter::AddBranch(const char name, void obj, Int_t bsize)
83			{
84			// Add branch with name "name" into tree with name "tname" and set its address
85			// to object pointer using a given buffer size and default splitlevel.
86
87			AddBranch(name, CName(obj), obj, bsize);
88			}
89
90	loizides	1.9	//--------------------------------------------------------------------------------------------------
91	loizides	1.2	void TreeWriter::AddBranch(const char name, const char cname,
92			void *obj)
93	loizides	1.1	{
94	loizides	1.2	// Add branch with name "name" into tree with name "tname" and set its address
95	loizides	1.3	// to object pointer for class name "cname" using a default buffer size and splitlevel.
96	loizides	1.1
97	loizides	1.7	MyTree *t = AddOrGetMyTree(GetName());
98			TBranch *b = t->Bronch(name, cname, obj, fDefBrSize, fDefSL);
99			b->SetCompressionLevel(GetCompressLevel());
100	loizides	1.1	}
101
102	loizides	1.9	//--------------------------------------------------------------------------------------------------
103	loizides	1.3	void TreeWriter::AddBranch(const char name, void obj)
104			{
105			// Add branch with name "name" into tree with name "tname" and set its address
106			// to object pointer using a default buffer size and splitlevel.
107
108			AddBranch(name, CName(obj), obj);
109			}
110
111	loizides	1.9	//--------------------------------------------------------------------------------------------------
112	loizides	1.2	void TreeWriter::AddBranchToTree(const char tname, const char name, const char *cname,
113			void *obj, Int_t bsize, Int_t level)
114	loizides	1.1	{
115	loizides	1.2	// Add branch with name "name" into tree with name "tname" and set its address
116			// to object pointer for class name "cname" using a given buffer size and splitlevel.
117	loizides	1.1
118	loizides	1.7	MyTree *t = AddOrGetMyTree(tname);
119			TBranch *b = t->Bronch(name, cname, obj, bsize, level);
120			b->SetCompressionLevel(GetCompressLevel());
121	loizides	1.2	}
122
123	loizides	1.9	//--------------------------------------------------------------------------------------------------
124	loizides	1.3	void TreeWriter::AddBranchToTree(const char tname, const char name, void *obj,
125			Int_t bsize, Int_t level)
126			{
127			// Add branch with name "name" into tree with name "tname" and set its address
128			// to object pointer using a given buffer size and splitlevel.
129
130			AddBranchToTree(tname, name, CName(obj), obj, bsize, level);
131			}
132
133	loizides	1.9	//--------------------------------------------------------------------------------------------------
134	loizides	1.2	void TreeWriter::AddBranchToTree(const char tname, const char name, const char *cname,
135	loizides	1.3	void *obj, Int_t bsize)
136	loizides	1.2	{
137			// Add branch with name "name" into tree with name "tname" and set its address
138			// to object pointer for class name "cname" using a given buffer size and default splitlevel.
139
140	loizides	1.7	MyTree *t = AddOrGetMyTree(tname);
141			TBranch *b = t->Bronch(name, cname, obj, bsize, fDefSL);
142			b->SetCompressionLevel(GetCompressLevel());
143	loizides	1.2	}
144
145	loizides	1.9	//--------------------------------------------------------------------------------------------------
146	loizides	1.3	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	loizides	1.9	//--------------------------------------------------------------------------------------------------
156	loizides	1.2	void TreeWriter::AddBranchToTree(const char tname, const char name, const char *cname,
157	loizides	1.3	void *obj)
158	loizides	1.2	{
159			// Add branch with name "name" into tree with name "tname" and set its address
160	loizides	1.3	// to object pointer for class name "cname" using a default buffer size and splitlevel.
161	loizides	1.2
162	loizides	1.7	MyTree *t = AddOrGetMyTree(tname);
163			TBranch *b = t->Bronch(name, cname, obj, fDefBrSize, fDefSL);
164			b->SetCompressionLevel(GetCompressLevel());
165	loizides	1.2	}
166
167	loizides	1.9	//--------------------------------------------------------------------------------------------------
168	loizides	1.3	void TreeWriter::AddBranchToTree(const char tname, const char name, void *obj)
169			{
170			// Add branch with name "name" into tree with name "tname" and set its address
171			// to object pointer for class name "cname" using a default buffer size and splitlevel.
172
173			AddBranchToTree(tname, name, CName(obj), obj);
174			}
175
176	loizides	1.9	//--------------------------------------------------------------------------------------------------
177	loizides	1.13	void TreeWriter::AddTree(const char *tname)
178			{
179			// Add tree with name "name" into tree with name "tname".
180
181			AddOrGetMyTree(tname);
182			}
183
184			//--------------------------------------------------------------------------------------------------
185	loizides	1.2	MyTree TreeWriter::AddOrGetMyTree(const char tn)
186			{
187			// Add new tree if not present in array of trees or return
188			// present tree.
189
190	loizides	1.13	MyTree *tree = GetMyTree(tn);
191	paus	1.4	if (tree)
192			return tree;
193	loizides	1.2
194			TDirectory::TContext context(fFile);
195			tree = new MyTree(tn, tn);
196			tree->SetDirectory(fFile);
197	loizides	1.12	if (fDoBranchRef)
198	loizides	1.8	tree->BranchRef();
199	loizides	1.2	fTrees.AddLast(tree);
200			return tree;
201	loizides	1.1	}
202
203	loizides	1.9	//--------------------------------------------------------------------------------------------------
204	loizides	1.1	Bool_t TreeWriter::BeginEvent(Bool_t doreset)
205			{
206			// Prepare for the next event. If doreset or fDoObjNumReset is kTRUE
207			// store the current object number to be reset in FillEvent().
208
209			if (!fIsInit) {
210			OpenFile();
211			}
212
213	loizides	1.2	if (doreset \|\| fDoObjNumReset) {
214	loizides	1.1	fEvtObjNum = TProcessID::GetObjectCount();
215			}
216
217			return kTRUE;
218			}
219
220	loizides	1.9	//--------------------------------------------------------------------------------------------------
221	loizides	1.1	void TreeWriter::CloseFile()
222			{
223	loizides	1.2	// Write tree(s) and close file.
224	loizides	1.1
225			if (!fIsInit) {
226			Fatal("CloseFile", "File was not opened, call OpenFile() first!");
227			return;
228			}
229
230			TDirectory::TContext context(fFile); // cd fFile &&
231			// automatically restore gDirectory
232
233	loizides	1.2	for (Int_t i=0;i<fTrees.GetEntries();++i) {
234			MyTree mt = static_cast<MyTree>(fTrees.At(i));
235			mt->Write(mt->GetName(),TObject::kOverwrite);
236	loizides	1.12
237			// backup and restore list of branch pointers from TRefTable (needed for autoloading)
238	bendavid	1.10	if (mt->GetBranchRef()) {
239			TObjArray *parents = mt->GetBranchRef()->GetRefTable()->GetParents();
240			TObjArray parentsBak(*parents);
241			mt->Reset();
242			for (Int_t j=0; j<parentsBak.GetEntries(); ++j)
243			parents->Add(parentsBak.At(j));
244			}
245			else
246			mt->Reset();
247	loizides	1.2	mt->SetDirectory(0);
248			}
249	loizides	1.1
250			fFile->Close();
251			delete fFile;
252			fFile = 0;
253
254			fIsInit = kFALSE;
255			fFileNumber++;
256			}
257
258	loizides	1.9	//--------------------------------------------------------------------------------------------------
259	loizides	1.3	const char TreeWriter::CName(void obj) const
260			{
261			// Dereference void* pointer into TObject* pointer
262
263			TObject tobj = dynamic_cast<TObject>((TObject*)obj);
264	paus	1.4	if (tobj==0) {
265	loizides	1.13	Fatal("CName", "Given void* ptr can not be dereferenced into TObject*");
266	loizides	1.3	}
267			return tobj->ClassName();
268			}
269
270	loizides	1.9	//--------------------------------------------------------------------------------------------------
271	loizides	1.13	void TreeWriter::DoBranchRef(const char *tn)
272			{
273			// Fill BranchRef for given tree.
274
275			if (fTrees.GetEntries()==0) {
276			Error("DoBranchRef", "Tree with name %s not found!", tn);
277			return;
278			}
279
280			MyTree *mt = GetMyTree(tn);
281			if (!mt)
282			return;
283
284			mt->BranchRef();
285			}
286
287			//--------------------------------------------------------------------------------------------------
288	loizides	1.1	Bool_t TreeWriter::EndEvent(Bool_t doreset)
289			{
290			// Store the event in the tree. If doreset or fDoObjNumReset is kTRUE
291			// restore the stored object number at the time BeginEvent(kTRUE)
292			// was called.
293
294			if (!fIsInit) {
295			Fatal("EndEvent", "File is not open, did you call BeginEvent?");
296			return kFALSE;
297			}
298
299	loizides	1.2	Int_t r = 0;
300			for (Int_t i=0;i<fTrees.GetEntries();++i) {
301			MyTree mt = static_cast<MyTree>(fTrees.At(i));
302	paus	1.4	if (mt->GetAutoFill()==0)
303			continue;
304	loizides	1.2	r += mt->Fill();
305			}
306	loizides	1.1
307	loizides	1.2	if (IsFull())
308	loizides	1.1	CloseFile();
309
310			if (doreset \|\| fDoObjNumReset) {
311			if (fEvtObjNum<0) {
312			Error("EndEvent", "Object counter is zero. Did you call BeginEvent(kTRUE)?");
313			} else {
314	loizides	1.11	// Reset the TRef table. Keep it from growing with each event (see doc)
315	loizides	1.1	TProcessID::SetObjectCount(fEvtObjNum);
316			}
317			}
318
319			return (r >= 0);
320			}
321
322	loizides	1.9	//--------------------------------------------------------------------------------------------------
323	loizides	1.2	Long64_t TreeWriter::GetEntries(const char *tn) const
324			{
325	loizides	1.6	// Return entries of tree with given name. If no tree is given, return sum of entries
326			// of all trees.
327	loizides	1.2
328			if (fTrees.GetEntries()==0) return -1;
329
330			if (tn) {
331			const TTree *mt=GetTree(tn);
332	paus	1.4	if (mt)
333			return mt->GetEntries();
334			else
335			return -1;
336	loizides	1.2	}
337
338			Long64_t ret = 0;
339			for (Int_t i=0;i<fTrees.GetEntries();++i) {
340			const MyTree mt = static_cast<const MyTree>(fTrees.At(i));
341			ret += mt->GetEntries();
342			}
343			return ret;
344			}
345
346	loizides	1.9	//--------------------------------------------------------------------------------------------------
347	loizides	1.2	MyTree mithep::TreeWriter::GetMyTree(const char tn)
348			{
349			// Return MyTree 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 static_cast<MyTree*>(obj);
363			return 0;
364			}
365
366	loizides	1.9	//--------------------------------------------------------------------------------------------------
367	loizides	1.2	const TTree mithep::TreeWriter::GetTree(const char tn) const
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<const TTree*>(obj);
383			return 0;
384			}
385
386	loizides	1.9	//--------------------------------------------------------------------------------------------------
387	loizides	1.2	TTree mithep::TreeWriter::GetTree(const char tn)
388			{
389			// Return TTree with given name from array.
390
391			if (fTrees.GetEntries()==0)
392			return 0;
393
394			TObject *obj = 0;
395			if (tn==0) {
396			obj = fTrees.At(0);
397			} else {
398			obj = fTrees.FindObject(tn);
399			}
400
401			if (obj)
402			return dynamic_cast<TTree*>(obj);
403			return 0;
404			}
405
406	loizides	1.9	//--------------------------------------------------------------------------------------------------
407	loizides	1.1	Bool_t TreeWriter::IsFull() const
408			{
409			// Check if the maximum file size has been reached.
410
411			Long64_t entries = GetEntries();
412			if (entries < 1) return kFALSE;
413
414			Long64_t avgSize = GetFileSize() / entries;
415
416			if (avgSize < fkMinAvgSize)
417			avgSize = fkMinAvgSize;
418
419			return (GetFileSize() + avgSize + fkMinFreeSpace) > fMaxSize;
420			}
421
422	loizides	1.9	//--------------------------------------------------------------------------------------------------
423	loizides	1.1	void TreeWriter::OpenFile()
424			{
425			// Open the file and attach the tree.
426
427			if (fIsInit) {
428			Fatal("OpenFile", "File is already open, call CloseFile first!");
429			return;
430			}
431
432			TDirectory::TContext context(0);
433
434			TString pathname=GetFullName();
435			gSystem->ExpandPathName(pathname);
436
437			fFile = TFile::Open(pathname, "RECREATE");
438			if (fFile == 0) {
439			Fatal("OpenFile", "Could not open file %s", pathname.Data());
440			return;
441			}
442
443			fFile->SetCompressionLevel(fCompressLevel);
444	loizides	1.2
445			for (Int_t i=0;i<fTrees.GetEntries();++i) {
446			MyTree mt = static_cast<MyTree>(fTrees.At(i));
447			mt->SetDirectory(fFile);
448			}
449
450	loizides	1.1	fIsInit = kTRUE;
451			}
452
453	loizides	1.9	//--------------------------------------------------------------------------------------------------
454	loizides	1.1	void TreeWriter::Print(Option_t *option) const
455			{
456			// Print the contents of the tree writer.
457
458	loizides	1.2	if (option) {
459	loizides	1.1	cout << ClassName() << " with members " << endl;
460			cout << " fBaseURL: " << fBaseURL << endl;
461			cout << " fPreFix: " << fPrefix << endl;
462			cout << " fFileNumber: " << fFileNumber << endl;
463			cout << " fCompressLevel: " << fCompressLevel << endl;
464			cout << " fDefBrSize: " << fDefBrSize << endl;
465			cout << " fDefSL: " << fDefSL << endl;
466			cout << " fMaxSize: " << fMaxSize << endl;
467			cout << " fDoObjNumReset: " << fDoObjNumReset << endl;
468			return;
469			}
470
471			cout << ClassName() << ": " << GetEntries()
472			<< (GetEntries() == 1 ? " event" : " events") << endl;
473			}
474
475	loizides	1.9	//--------------------------------------------------------------------------------------------------
476	loizides	1.2	void TreeWriter::SetAutoFill(const char *tn, Bool_t b)
477			{
478			// Set auto-fill mode of tree with given name.
479
480	paus	1.4	if (fTrees.GetEntries()==0)
481			return;
482	loizides	1.2
483			MyTree *mt = GetMyTree(tn);
484	paus	1.4	if (!mt)
485			return;
486	loizides	1.2
487			mt->SetAutoFill(b);
488			}
489
490	loizides	1.9	//--------------------------------------------------------------------------------------------------
491	loizides	1.5	void TreeWriter::SetMaxSize(Long64_t s)
492			{
493			// Set maximum file size. Check if this exceeds the ROOT file size and if,
494			// print a warning and adjust it.
495
496			if (s>=(Long64_t)(0.99 * TTree::GetMaxTreeSize())) {
497			Long64_t news = (Long64_t)(s/0.99);
498			Warning("SetMaxSize", "Maximum tree size increased from %lld to %lld",
499			TTree::GetMaxTreeSize(), news);
500			TTree::SetMaxTreeSize(news);
501			}
502
503			fMaxSize=s;
504			}
505
506	loizides	1.9	//--------------------------------------------------------------------------------------------------
507	loizides	1.1	void TreeWriter::StoreObject(const TObject *obj)
508			{
509			// Store object next to tree in file. Used to store the
510			// settings of how the tree was created.
511
512			if (!fIsInit) {
513			Fatal("StoreObject", "Tree is not created, call create first!");
514			return;
515			}
516
517			if (!obj) {
518			Fatal("StoreObject", "Ptr to TObject is null!");
519			return;
520			}
521
522			fFile->WriteTObject(obj,obj->GetName(),"WriteDelete");
523			}
524	loizides	1.13
525			//__________________________________________________________________________________________________
526			void TreeWriter::Terminate()
527			{
528			// Terminate tree file writing.
529
530			if (fIsInit) {
531			CloseFile();
532			}
533
534			TDirectory::TContext context(0);
535			fTrees.Clear();
536			}