Fix to ClassCastException when using JPA

[safris]

Fix for #60.

[coveralls]

Pull Request Test Coverage Report for Build 217

• 14 of 14 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.7%) to 48.312%

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Totals
Change from base Build 216:	0.7%
Covered Lines:	458
Relevant Lines:	948

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💛 - Coveralls