| /** |
| * 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.storm.utils; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Arrays; |
| |
| |
| public class BufferInputStream implements AutoCloseable { |
| byte[] buffer; |
| InputStream stream; |
| |
| public BufferInputStream(InputStream stream, int bufferSize) { |
| this.stream = stream; |
| buffer = new byte[bufferSize]; |
| } |
| |
| public BufferInputStream(InputStream stream) { |
| this(stream, 15 * 1024); |
| } |
| |
| public byte[] read() throws IOException { |
| int length = stream.read(buffer); |
| if (length == -1) { |
| close(); |
| return new byte[0]; |
| } else if (length == buffer.length) { |
| return buffer; |
| } else { |
| return Arrays.copyOf(buffer, length); |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| stream.close(); |
| } |
| } |