Changeset 760 for trunk/MagicSoft/Mars/mbase

Timestamp:

04/23/01 14:16:02 (24 years ago)

Author:

tbretz

Message:

*** empty log message ***

Location:

trunk/MagicSoft/Mars/mbase

Files:

• MReadTree.cc (modified) (6 diffs)
• MReadTree.h (modified) (1 diff)

trunk/MagicSoft/Mars/mbase/MReadTree.cc

@@ -55 +55 @@
 
 // --------------------------------------------------------------------------
+//
+//  Default constructor. It creates an TChain instance which represents the
+//  the Tree you want to read and adds the given file (if you gave one).
+//  More files can be added using MReadTree::AddFile.
+//  Also an empty veto list is created. This list is used if you want to
+//  veto (disable or "don't enable") a branch in the tree.
+//
 MReadTree::MReadTree(const char *tname, const char *fname,
                      const char *name, const char *title)
@@ -72 +79 @@
 
 // --------------------------------------------------------------------------
+//
+// Destructor. It deletes the TChain and veto list object
+//
 MReadTree::~MReadTree()
 {
@@ -79 +89 @@
 
 // --------------------------------------------------------------------------
+//
+//  If you want to read the given tree over several files you must add
+//  the files here before PreProcess is called. Be carfull: This does
+//  only work if the trees in the files containing the same branches yet.
+//
 /*Int_t*/ void MReadTree::AddFile(const char *fname)
 {
@@ -92 +107 @@
 // --------------------------------------------------------------------------
 //
-// open file and check if file is really open
+//  The PreProcess loops (till now) over the branches in the given tree.
+//  It checks if the corresponding containers (containers with the same
+//  name than the branch name) are existing in the Parameter Container List.
+//  If not, a container of objec type 'branch-name' is created (everything
+//  after the last semicolon in the branch name is stripped). Only
+//  branches which don't have a veto (see VetoBranch) are enabled If the
+//  object isn't found in the root dictionary (a list of classes known by the
+//  root environment) the branch is skipped and an error message is printed
+//  out.
 //
 Bool_t MReadTree::PreProcess (MParList *pList)
@@ -167 +190 @@
 
 // --------------------------------------------------------------------------
+//
+//  The Process-function reads one event from the tree (this contains all
+//  enabled branches) and increases the position in the file by one event.
+//  (Remark: The position can also be set by some member functions
+//  If the end of the file is reached the Eventloop is stopped.
 Bool_t MReadTree::Process()
 {
@@ -178 +206 @@
     // get entry
     //
-    fChain->GetEntry(fNumEntry );
-
-    fNumEntry ++ ; 
-
-    return kTRUE;
-}
-
-// --------------------------------------------------------------------------
-//
-// Close File
-//
-Bool_t MReadTree::PostProcess()
-{
-    //fFile->Close();
+    fChain->GetEntry(fNumEntry);
+
+    fNumEntry++;
 
     return kTRUE;

trunk/MagicSoft/Mars/mbase/MReadTree.h

@@ -29 +29 @@
     Bool_t PreProcess(MParList *pList);
     Bool_t Process();
-    Bool_t PostProcess();
 
     void AddFile(const char *fname);