hbase-common/src/main/java/org/apache/hadoop/hbase/util/ImmutableByteArray.java

   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.util;
  19
  20 import org.apache.yetus.audience.InterfaceAudience;
  21
  22 /**
  23  * Mainly used as keys for HashMap.
  24  */
  25 @InterfaceAudience.Private
  26 public final class ImmutableByteArray {
  27
  28   private final byte[] b;
  29
  30   private ImmutableByteArray(byte[] b) {
  31     this.b = b;
  32   }
  33
  34   @Override
  35   public int hashCode() {
  36     return Bytes.hashCode(b);
  37   }
  38
  39   @Override
  40   public boolean equals(Object obj) {
  41     if (obj == null || obj.getClass() != ImmutableByteArray.class) {
  42       return false;
  43     }
  44     return Bytes.equals(b, ((ImmutableByteArray) obj).b);
  45   }
  46
  47   public static ImmutableByteArray wrap(byte[] b) {
  48     return new ImmutableByteArray(b);
  49   }
  50
  51   public String toString() {
  52     return Bytes.toStringBinary(b);
  53   }
  54 }