branch-2.0.4-alpha/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/util/ByteBufferOutputStream.java

/**
 * 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.hdfs.util;

import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;

/**
 * OutputStream that writes into a {@link ByteBuffer}.
 */
@InterfaceAudience.Private
@InterfaceStability.Stable
public class ByteBufferOutputStream extends OutputStream {

  private final ByteBuffer buf;

  public ByteBufferOutputStream(ByteBuffer buf) {
    this.buf = buf;
  }

  @Override
  public void write(int b) throws IOException {
    buf.put((byte)b);
  }

  @Override
  public void write(byte[] b, int off, int len) throws IOException {
    buf.put(b, off, len);
  }
}