xp-framework/core — pull request #43 by thekid (2014-10-18 12:22:00+00:00)
Title: RFC #0291: Initial implementation

For errors starting with "Undefined" or "Uninitialized", we will raise a NullPointerException, for errors with "Missing" in the beginning, an IllegalArgumentException, and for error ending with "string conversion"
we will throw ClassCastExceptions.

Good enough for the moment, though possibly risky to catch unintended errors.