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.giraph.function; 19 20 import java.io.Serializable; 21 22 /** 23 * Function: 24 * () -> T 25 * <br> 26 * Specialization of com.google.common.base.Supplier, that is also 27 * Serializable. 28 * 29 * @param <T> Result type 30 */ 31 public interface Supplier<T> extends Serializable { 32 /** 33 * Retrieves an instance of the appropriate type. The returned object may or 34 * may not be a new instance, depending on the implementation. 35 * 36 * @return result 37 */ 38 T get(); 39 }