content: /**
   * 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 com.aliyun.odps.mapred.bridge.streaming.io;
  
  import java.io.IOException;
  
  import com.aliyun.odps.mapred.bridge.streaming.PipeMapRed;
  
  /**
   * Abstract base for classes that write the client's input.
   */
  public abstract class InputWriter<K, V> {
  
    /**
     * Initializes the InputWriter. This method has to be called before calling
     * any of the other methods.
     */
    public void initialize(PipeMapRed pipeMapRed) throws IOException {
      // nothing here yet, but that might change in the future
    }
  
    /**
     * Writes an input key.
     */
    public abstract void writeKey(K key) throws IOException;
  
    /**
     * Writes an input value.
     */
    public abstract void writeValue(V value) throws IOException;
  
  }
  