| /** |
| * 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.hbase.io; |
| |
| import java.io.DataInput; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| |
| /** |
| * An InputStream that wraps a DataInput. |
| * @see DataOutputOutputStream |
| */ |
| @InterfaceAudience.Private |
| public class DataInputInputStream extends InputStream { |
| |
| private DataInput in; |
| |
| /** |
| * Construct an InputStream from the given DataInput. If 'in' |
| * is already an InputStream, simply returns it. Otherwise, wraps |
| * it in an InputStream. |
| * @param in the DataInput to wrap |
| * @return an InputStream instance that reads from 'in' |
| */ |
| public static InputStream constructInputStream(DataInput in) { |
| if (in instanceof InputStream) { |
| return (InputStream)in; |
| } else { |
| return new DataInputInputStream(in); |
| } |
| } |
| |
| |
| public DataInputInputStream(DataInput in) { |
| this.in = in; |
| } |
| |
| @Override |
| public int read() throws IOException { |
| return in.readUnsignedByte(); |
| } |
| } |