[linuxtools-dev] TMF : createExecutableExtension in instantiateTrace() of TmfTraceElement.java

[Chen RanHow]

Hi TMF advances

Thank you team for the powerful framework, I have a question bellow

In  TmfTraceElement.java

I saw createExecutableExtension() in instantiateTrace() to get an instance
from the extension points like bellow

                IConfigurationElement ce =
sfTraceTypeAttributes.get(fTraceTypeId);

                .......

                ITmfTrace trace = (ITmfTrace)
ce.createExecutableExtension(TmfTraceType.TRACE_TYPE_ATTR);

               ......

               return trace;

I wonder why not just use TmfTraceType.getInstance() to do it ?

Since the init() in TmfTraceType constructor
call populateCategoriesAndTraceTypes()

The instance of createExecutableExtension is created

Could it be replaced with

            TraceTypeHelper tth =
TmfTraceType.getInstance().getTraceType(fTraceTypeId);

            ITmfTrace trace = tth.getTrace();

            return trace;

Or I misunderstand it ?

Please kindly to reply

Ran-How

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