Object Persistence: Writing C++ objects to a file to be read back in by a different program later.

CPU intensive analyses need this in order to break the analysis up into stages. For example, CLAS does a first pass tracking reconstruction once, while many individual analyses can be done starting with the "cooked" files.

Along with event-based information, other objects should be stored in the file such as the list of DParameters.

What JIL provides ...

A simple example:

A simple Class

Putting objects into a file

Reading objects from a file

Extracting complex structure information using gdb

XML representation of data members

(De)Serializers generated from XML

void Deserialize(JILStream&) methods declared will have those methods generated which can then serialize private and protected data members too.

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Output from consumer:

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Final Notes

• This work will be presented at CHEP06 in Mumbai, India in February.
• Work has been done to integrate JIL I/O into DANA. Factory data has successfully been written/read.
• Doxygen documentation for JIL