1 /** 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 package org.apache.hadoop.hbase.io; 19 20 import java.io.DataOutput; 21 import java.io.IOException; 22 import java.io.OutputStream; 23 24 /** 25 * OutputStream implementation that wraps a DataOutput. 26 */ 27 class DataOutputOutputStream extends OutputStream { 28 29 private final DataOutput out; 30 31 /** 32 * Construct an OutputStream from the given DataOutput. If 'out' 33 * is already an OutputStream, simply returns it. Otherwise, wraps 34 * it in an OutputStream. 35 * @param out the DataOutput to wrap 36 * @return an OutputStream instance that outputs to 'out' 37 */ 38 public static OutputStream constructOutputStream(DataOutput out) { 39 if (out instanceof OutputStream) { 40 return (OutputStream)out; 41 } else { 42 return new DataOutputOutputStream(out); 43 } 44 } 45 46 private DataOutputOutputStream(DataOutput out) { 47 this.out = out; 48 } 49 50 @Override 51 public void write(int b) throws IOException { 52 out.writeByte(b); 53 } 54 55 @Override 56 public void write(byte[] b, int off, int len) throws IOException { 57 out.write(b, off, len); 58 } 59 60 @Override 61 public void write(byte[] b) throws IOException { 62 out.write(b); 63 } 64 }