Extend property expression language to include named functions
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Key: TAP5-1829
URL: https://issues.apache.org/jira/browse/TAP5-1829
Project: Tapestry 5
Issue Type: New Feature
Components: tapestry-core
Affects Versions: 5.4
Reporter: Howard M. Lewis Ship
Priority: Minor
It would be nice to by able to define, as a service contribution, a function
that could be referenced inside a property expression. This could be used for
frequent operations such as sorting a collection, or defaulting null values.
It's a bit tricky, since the property expression language is generics aware;
the function provided (possibly: a static method on a class) would also need to
support generics.
Currently, this can be done in Java code, but it either leads to heavy base
classes (providing utility methods) or some ugly repetition.
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