/** * Copyright 2005 The Apache Software Foundation * * Licensed 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;import java.io.IOException;import java.io.DataOutput;import org.apache.hadoop.io.WritableComparable;import org.apache.hadoop.io.Writable;/** Writes key/value pairs to an output file.  Implemented by {@link * OutputFormat} implementations. */public interface RecordWriter {  /** Writes a key/value pair.   *   * @param key the key to write   * @param value the value to write   *   * @see Writable#write(DataOutput)   */        void write(WritableComparable key, Writable value) throws IOException;  /** Close this to future operations.*/   void close(Reporter reporter) throws IOException;}