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
   *
   *   https://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.avro.message;
  
  import java.io.IOException;
  import java.io.OutputStream;
  import java.nio.ByteBuffer;
  
  /**
   * Serializes an individual datum as a ByteBuffer or to an OutputStream.
   * 
   * @param <D> a datum class
   */
  public interface MessageEncoder<D> {
  
    /**
     * Serialize a single datum to a ByteBuffer.
     *
     * @param datum a datum
     * @return a ByteBuffer containing the serialized datum
     * @throws IOException
     */
    ByteBuffer encode(D datum) throws IOException;
  
    /**
     * Serialize a single datum to an OutputStream.
     *
     * @param datum  a datum
     * @param stream an OutputStream to serialize the datum to
     * @throws IOException
     */
    void encode(D datum, OutputStream stream) throws IOException;
  
  }
  