1 /**
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.hadoop.hbase.ipc;
19
20 /**
21 * Utility for managing the flag byte passed in response to a
22 * {@link HBaseServer.Call}
23 */
24 class ResponseFlag {
25 private static final byte ERROR_BIT = 0x1;
26 private static final byte LENGTH_BIT = 0x2;
27
28 private ResponseFlag() {
29 // Make it so this class cannot be constructed.
30 }
31
32 static boolean isError(final byte flag) {
33 return (flag & ERROR_BIT) != 0;
34 }
35
36 static boolean isLength(final byte flag) {
37 return (flag & LENGTH_BIT) != 0;
38 }
39
40 static byte getLengthSetOnly() {
41 return LENGTH_BIT;
42 }
43
44 static byte getErrorAndLengthSet() {
45 return LENGTH_BIT | ERROR_BIT;
46 }
47 }