| /** |
| * 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.mapred.nativetask.serde; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.mapred.nativetask.buffer.DataInputStream; |
| import org.apache.hadoop.mapred.nativetask.buffer.DataOutputStream; |
| import org.apache.hadoop.mapred.nativetask.util.SizedWritable; |
| |
| /** |
| * serializes key-value pair |
| */ |
| @InterfaceAudience.Private |
| public interface IKVSerializer { |
| |
| /** |
| * update the length field of SizedWritable |
| */ |
| public void updateLength(SizedWritable<?> key, SizedWritable<?> value) throws IOException; |
| |
| public int serializeKV(DataOutputStream out, SizedWritable<?> key, |
| SizedWritable<?> value) throws IOException; |
| |
| public int serializePartitionKV(DataOutputStream out, int partitionId, |
| SizedWritable<?> key, SizedWritable<?> value) |
| throws IOException; |
| |
| public int deserializeKV(DataInputStream in, SizedWritable<?> key, SizedWritable<?> value) |
| throws IOException; |
| } |
