Peter Cowan created XERCESJ-1620:
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Summary: ClassCastException in XMLGregorianCalendar when comparing
different implementations of XMLGregorianCalendar
Key: XERCESJ-1620
URL: https://issues.apache.org/jira/browse/XERCESJ-1620
Project: Xerces2-J
Issue Type: Bug
Components: JAXP (javax.xml.datatype)
Affects Versions: 2.11.0
Reporter: Peter Cowan
When using the compare method on the XMLGregorianCalendarImpl, it attempts to
cast both the lhs and the rhs XMLGregorianCalendars to an
XMLGregorianCalendarImpl.
If a user supplies a non-Xerces or repackaged implementation of
XMLGregorianCalendar to this method a ClassCastException is thrown.
The objects P and Q that are created from the cast to XMLGregorianCalendarImpl
are then passed to the internalCompare method which only requires the arguments
to be the abstract class, rendering the cast irrelevant.
Since the equality of a Xerces XMLGregorianCalendar delegates to compare, the
equals method is then prone to throwing the ClassCastException if a non-Xerces
or repackaged implementation is supplied.
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