Component events for input translation and validation
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Key: TAPESTRY-1476
URL: https://issues.apache.org/jira/browse/TAPESTRY-1476
Project: Tapestry
Issue Type: New Feature
Affects Versions: 5.0
Reporter: Howard M. Lewis Ship
Fix For: 5.0
It seems to me we could leverage the existing component event hierarchy to
allow for tightly customized input translation and parsing.
I would propose three component events:
"toclient" : corresponds to Translator.toClient(). Passed an object as the
context (possibly null), result must be a String.
"parseclient": corresponds to Translator.parseClient(). Passed a string as the
context, returns an object or throws ValidationException.
"validate": corresponds to Validator.validateInput(). Passed an object
(provided by the translator). No return value. May throw ValidationException.
We'll have to come up with a better mechanism for allowing event handler
methods to throw an exception. Currently, I suspect, that you would get
Javassist compile errors if you try!
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