/** Converts a reference to a value. */
V dereferenceValue(Object o) {
if (o == null) {
return null;
}
Object value = dereference(valueReferenceType, o);
if (o instanceof InternalReference) {
InternalReference reference = (InternalReference) o;
if (value == null) {
reference.finalizeReferent(); // old value was garbage collected
}
}
return (V) value;
}
void cleanUp(Reference reference) {
try {
((InternalReference) reference).finalizeReferent();
} catch (Throwable t) {
throw new IllegalStateException("Unable to clean up after reference", t);
}
}
