| /** |
| * 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.io; |
| |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** |
| * OutputStream implementation that wraps a DataOutput. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Unstable |
| public class DataOutputOutputStream extends OutputStream { |
| |
| private final DataOutput out; |
| |
| /** |
| * Construct an OutputStream from the given DataOutput. If 'out' |
| * is already an OutputStream, simply returns it. Otherwise, wraps |
| * it in an OutputStream. |
| * @param out the DataOutput to wrap |
| * @return an OutputStream instance that outputs to 'out' |
| */ |
| public static OutputStream constructOutputStream(DataOutput out) { |
| if (out instanceof OutputStream) { |
| return (OutputStream)out; |
| } else { |
| return new DataOutputOutputStream(out); |
| } |
| } |
| |
| private DataOutputOutputStream(DataOutput out) { |
| this.out = out; |
| } |
| |
| @Override |
| public void write(int b) throws IOException { |
| out.writeByte(b); |
| } |
| |
| @Override |
| public void write(byte[] b, int off, int len) throws IOException { |
| out.write(b, off, len); |
| } |
| |
| @Override |
| public void write(byte[] b) throws IOException { |
| out.write(b); |
| } |
| |
| |
| } |