Philip (flip) Kromer created DATAFU-50:
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Summary: SimpleEvalFunc should extend ContextualEvalFunc, have
good lifecycle hooks
Key: DATAFU-50
URL: https://issues.apache.org/jira/browse/DATAFU-50
Project: DataFu
Issue Type: Improvement
Reporter: Philip (flip) Kromer
Being able to squirrel away values frozen at frontend-launch-time is very
handy.
This does two things:
* makes SimpleEvalFunc extend ContextualEvalFunc rather than
plain-old-EvalFunc. This seems harmless and gains you all that power of
Contextualism.
* Adds a hook method "void schemaReadyHook(inputSchema,outputSchema)" to
ContextualEvalFunc, called once the schemata are prepared. This acts as sugar
for classes that want to set properties at front-end time to be used at later
points but which, like most SimpleEvalFunc's, want nothing to do with schema
calculation. In ContextualEvalFunc it does nothing; subclasses may override it
and if so must call super. schemaReadyHook().
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