Marshall Schor created UIMA-5904:
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Summary: work around Java 11 build issue with ByteBuffer return
type change
Key: UIMA-5904
URL: https://issues.apache.org/jira/browse/UIMA-5904
Project: UIMA
Issue Type: Bug
Components: Core Java Framework
Environment: only happens when building with Java > 8 and then running
with Java 8
Reporter: Marshall Schor
Assignee: Marshall Schor
Fix For: 3.0.1SDK
See https://github.com/apache/felix/pull/114 .
Java 9 introduces overridden methods with covariant return types for the
following methods in java.nio.ByteBuffer:
position(int newPosition)
limit(int newLimit)
flip()
clear()
mark()
reset()
rewind()
In Java 9 they all now return ByteBuffer, whereas the methods they override
return Buffer,
resulting in exceptions like this when executing on Java 8 and lower:
java.lang.NoSuchMethodError: java.nio.ByteBuffer.limit(I)Ljava/nio/ByteBuffer
This is because the generated byte code includes the static return type of the
method, which is not found on Java 8 and lower because the overloaded methods
with covariant return types don't exist (the issue appears even with source and
target 8 or lower in compilation parameters).
The solution is to cast ByteBuffer instances to Buffer before calling the
method.
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