[wtp-dev] Submission for PMC approval (1.5.1) 158070 - JSPJavaValidator

[Nitin Dahyabhai <nitind@xxxxxxxxxx>]

https://bugs.eclipse.org/bugs/show_bug.cgi?id=158070

The JSPJavaValidator is responsible
for reporting Javaish errors in JSP files.  To do so, it creates a
mini-translation of a JSP, inserts the translated Java source into the
JDT model, and runs it through the JDT compiler.  The results from
the compiler are translated back into the right offsets in the JSP file
as validation messages.  When the Java source is inserted into the
JDT model (and then removed), notification is fired from the JDT level
and the processing time of the listeners ends up impacting the measured
speed of the validator.  In the case mentioned in the bug, there's
both a slow listener and a large number of notifications being sent when
validating a large project.  The solution developed is to encase the
JSPJavaValidator's JDT calls inside of a JDT JavaModelOperation, reducing
the many notifications that would have been sent before (two per file for
each JSP file) down to one single notification regardless of how
many files were validated.

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Nitin Dahyabhai