| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hdfs.util; |
| |
| /** |
| * A Holder is simply a wrapper around some other object. This is useful |
| * in particular for storing immutable values like boxed Integers in a |
| * collection without having to do the "lookup" of the value twice. |
| */ |
| public class Holder<T> { |
| public T held; |
| |
| public Holder(T held) { |
| this.held = held; |
| } |
| |
| @Override |
| public String toString() { |
| return String.valueOf(held); |
| } |
| } |
