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.types; 19 20 import org.apache.hadoop.io.Writable; 21 22 /** 23 * Converts from Writable type to Java type 24 * 25 * @param <W> Writable type 26 * @param <J> Java type 27 */ 28 public interface WritableUnwrapper<W extends Writable, J> { 29 /** 30 * Convert from writable type to java type 31 * 32 * @param writableValue writable type 33 * @return java type 34 */ 35 J unwrap(W writableValue); 36 }