/**
* Serializes an {@link MBeanFeatureInfo} to an {@link ObjectOutputStream}.
*
* @serialData For compatibility reasons, an object of this class is serialized as follows.
* <ul>
* The method {@link ObjectOutputStream#defaultWriteObject defaultWriteObject()} is called
* first to serialize the object except the field {@code descriptor} which is declared as
* transient. The field {@code descriptor} is serialized as follows:
* <ul>
* <li>If {@code descriptor} is an instance of the class {@link ImmutableDescriptor}, the
* method {@link ObjectOutputStream#write write(int val)} is called to write a byte
* with the value {@code 1}, then the method {@link ObjectOutputStream#writeObject
* writeObject(Object obj)} is called twice to serialize the field names and the field
* values of the {@code descriptor}, respectively as a {@code String[]} and an {@code
* Object[]};
* <li>Otherwise, the method {@link ObjectOutputStream#write write(int val)} is called to
* write a byte with the value {@code 0}, then the method {@link
* ObjectOutputStream#writeObject writeObject(Object obj)} is called to serialize
* directly the field {@code descriptor}.
* </ul>
* </ul>
*
* @since 1.6
*/
private void writeObject(ObjectOutputStream out) throws IOException {
out.defaultWriteObject();
if (descriptor != null && descriptor.getClass() == ImmutableDescriptor.class) {
out.write(1);
final String[] names = descriptor.getFieldNames();
out.writeObject(names);
out.writeObject(descriptor.getFieldValues(names));
} else {
out.write(0);
out.writeObject(descriptor);
}
}
