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Posted to dev@tapestry.apache.org by "B.S.Navin (JIRA)" <ta...@jakarta.apache.org> on 2006/09/29 05:57:50 UTC
[jira] Commented: (TAPESTRY-906) Make the
org.apache.tapestry.services.impl.ExpressionEvaluatorImpl.createContext()
method public/protected
[ http://issues.apache.org/jira/browse/TAPESTRY-906?page=comments#action_12438633 ]
B.S.Navin commented on TAPESTRY-906:
------------------------------------
I have tried out a custom NullHandler. But the problem is that i can't get a context as to whether the actual operation is a "set" or a "get".
I need this so that I can decide whether to just return a new instance of the required type or to also set it back into the null property.
> Make the org.apache.tapestry.services.impl.ExpressionEvaluatorImpl.createContext() method public/protected
> ----------------------------------------------------------------------------------------------------------
>
> Key: TAPESTRY-906
> URL: http://issues.apache.org/jira/browse/TAPESTRY-906
> Project: Tapestry
> Issue Type: Improvement
> Components: Framework
> Affects Versions: 4.0.1
> Reporter: B.S.Navin
> Assigned To: Andreas Andreou
> Priority: Minor
>
> I have my own OGNL property accessor to handle nulls in my object graph. But I have some logic in it, which needs to know if the root ognl operation was a set/get.
> OGNL provides a feature called "traceEvaluations" in which we call "setTraceEvaluations(true)" on the OgnlContext and the property accessor is provided with the evaluation. Using this evaaluation, it is possible to find if the root ognl operation was a set/get.
> Tapestry creates the OgnlContext in the org.apache.tapestry.services.impl.ExpressionEvaluatorImpl.createContext() method. As it is currently private, I had no choice but to duplicate the class source in my own class, add the required line and replace it as the implementation of the ExpressionEvaluator service.
> It would be good if it is made protected/public. Then I can subclass it / intercept the createContext() method and do my stuff.
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