DefaultMXBeanMappingFactory.java 文件源码

@Override
final Object fromNonNullOpenValue(Object openValue)
        throws InvalidObjectException {
    final Object[] openArray = (Object[]) openValue;
    final Collection<Object> valueCollection;
    try {
        @SuppressWarnings("deprecation")
        Collection<?> tmp = collectionClass.newInstance();
        valueCollection = cast(tmp);
    } catch (Exception e) {
        throw invalidObjectException("Cannot create collection", e);
    }
    for (Object o : openArray) {
        Object value = elementMapping.fromOpenValue(o);
        if (!valueCollection.add(value)) {
            final String msg =
                "Could not add " + o + " to " +
                collectionClass.getName() +
                " (duplicate set element?)";
            throw new InvalidObjectException(msg);
        }
    }
    return valueCollection;
}