Delphes' module system is inspired by the 'Folders and Tasks' chapter from the ROOT Users Guide and it's based on the {{{TTask}}} and {{{TFolder}}} classes.

http://root.cern.ch/download/doc/ROOTUsersGuideHTML/ch10.html

All Delphes' modules consume and produce {{{TObjArrays}}} of {{{ExRootCandidates}}}. Every Delphes' module has a corresponding {{{TFolder}}} that is used to store {{{TObjArrays}}} produced by this module. Any Delphes' module can access {{{TObjArrays}}} produced by other Delphes' module using {{{ImportArray("ModuleInstanceName/arraName")}}} method.

The contents of all Delphes' {{{TFolders}}} and {{{TObjArrays}}} is browsable. All the modules are accessible from the '/Delphes' folder and all the {{{TObjArrays}}} are accessible from the '/Export' folder.

[[Image(delphes_folders.png)]]

Additional classes {{{ExRootTask}}} and {{{ExRootModule}}} has been developed to provide frequently used services for Delphes. All Delphes' modules inherit from {{{ExRootModule}}}.

{{{
#ifndef ExampleModule_h
#define ExampleModule_h

#include "ExRootAnalysis/ExRootModule.h"

#include <map>
#include <set>
#include <deque>

class TArrayD;
class TObjArray;
class ExRootCandidate;

class ExampleModule: public ExRootModule
{
public:

  ExampleModule();
  ~ExampleModule();

  void Init();
  void Process();
  void Finish();

private:

  TIterator *fItInputArray; //!

  const TObjArray *fInputArray; //!

  TObjArray *fOutputArray; //!

  ClassDef(ExampleModule, 1)
};

#endif
}}}