Created by: upachler
I'd like to fix issue #3995 with this PR (see my comments there).
The fix creates an additional static method fromString() as required by the JAX RS spec, so that compliant implementations can correctly parse enum arguments whoose wire string representation differs from the Java enum field name (e.g. MyEnum.FOO vs. "foo"). As it stands right now, a JAX RS implementation would expect "FOO" as a value passed as parameter, so parsing "foo" will fail.
I've coded this fix against v4.3.1, as I ran into other issues with 5.0.0 in my project and did use 4.3.1 there; however I assume this can be merged into both the 4.3.x and 5.0.x lines. I couldn't find a release branch for 4.3.x, so this PR is made against master in the hope that it will also be patched into the 4.3.x line if accepted.
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