1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache license, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the license for the specific language governing permissions and 15 * limitations under the license. 16 */ 17 package org.apache.log4j.builders; 18 19 /** 20 * Provides a place to hold values generated inside of a Lambda expression. 21 */ 22 public class Holder<T> { 23 private T value; 24 25 public Holder() { 26 } 27 28 public Holder(T defaultValue) { 29 this.value = defaultValue; 30 } 31 32 public void set(T value) { 33 this.value = value; 34 } 35 36 public T get() { 37 return value; 38 } 39 }