How to use

setEmpty

method

in

alluxio.security.authorization.DefaultAccessControlList

@Override
public void setEntry(AclEntry entry) {
 if (isEmpty() && mAccessAcl != null) {
  mMode = mAccessAcl.mMode;
 }
 super.setEntry(entry);
 setEmpty(false);
}

/**
 * Creates a child directory's access ACL and default ACL based on the default ACL.
 * @param umask child's umask
 * @return child directory's access ACL and default ACL
 */
public Pair<AccessControlList, DefaultAccessControlList> generateChildDirACL(Short umask) {
 AccessControlList acl = generateChildFileACL(umask);
 DefaultAccessControlList dAcl = new DefaultAccessControlList(acl);
 dAcl.setEmpty(false);
 dAcl.mOwningUser = mOwningUser;
 dAcl.mOwningGroup = mOwningGroup;
 dAcl.mMode = mMode;
 if (mExtendedEntries == null) {
  dAcl.mExtendedEntries = null;
 } else {
  dAcl.mExtendedEntries = new ExtendedACLEntries(mExtendedEntries);
 }
 return new Pair<>(acl, dAcl);
}

/**
 * @param pAcl the proto representation
 * @return the {@link AccessControlList} instance created from the proto representation
 */
public static AccessControlList fromProto(PAcl pAcl) {
 AccessControlList acl;
 if (pAcl.getIsDefault()) {
  acl = new DefaultAccessControlList();
  ((DefaultAccessControlList) acl).setEmpty(pAcl.getIsDefaultEmpty());
 } else {
  acl = new AccessControlList();
 }
 acl.setOwningUser(pAcl.getOwner());
 acl.setOwningGroup(pAcl.getOwningGroup());
 acl.setMode((short) pAcl.getMode());
 if (pAcl.getEntriesCount() > 0) {
  for (PAclEntry tEntry : pAcl.getEntriesList()) {
   acl.setEntry(fromProto(tEntry));
  }
 }
 return acl;
}