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.ops.collections; 19 20 import java.io.DataInput; 21 import java.io.DataOutput; 22 import java.io.IOException; 23 24 /** 25 * Handler for knowing how to serialize/deserialize type T 26 * 27 * @param <T> Type of object to be serialized. 28 */ 29 public interface WritableWriter<T> { 30 /** 31 * Serialize the fields of <code>value</code> to <code>out</code>. 32 * 33 * @param out <code>DataOuput</code> to serialize object into. 34 * @param value Object to serialize 35 * @throws IOException 36 */ 37 void write(DataOutput out, T value) throws IOException; 38 39 /** 40 * Deserialize the fields of object from <code>in</code>. 41 * 42 * @param in <code>DataInput</code> to deseriablize object from. 43 * @return Deserialized object. 44 * @throws IOException 45 */ 46 T readFields(DataInput in) throws IOException; 47 }