On 21/03/2023 17:35, Christopher Schultz wrote:
<snip/>
I'm curious about this.
How is a "functional interface" (i.e. all methods are abstract, except
for those which were originally-defined in java.lang.Object and for some
reason overridden to be abstract in this functional-interface) different
from an actual interface, and why does JSP care?
I can't tell what the use-case is from reading the unit tests.
This feature originates with this EL issue:
https://github.com/jakartaee/expression-language/issues/45
I was doing some research into this issue:
https://github.com/jakartaee/expression-language/issues/176
and discovered an expression (tested in testOptional01) that should have
worked but failed due to an NPE.
Mark
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