JSF composite:attribute with f:attribute conversion error?

This is indeed an unfortunate corner case with numbers in EL and composite component attributes. There's no solution for this. The type information is not available in {cc.

Attrs} when used in f:attribute and thus treated as String . The {15} cannot be represented as an integer in EL either, all numbers are always implicitly treated as Long when the type information is absent. The ClassCastException can be prevented by using a tag file instead of a composite component.

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