in hadoop-api-shim/src/main/java/org/apache/hadoop/fs/shim/impl/FileSystemShimImpl.java [130:135]
private void setLongOpt(Object builder, Method opt, String key, long len)
throws InvocationTargetException, IllegalAccessException {
if (len >= 0) {
opt.invoke(builder, key, Long.toString(len));
}
}