| /** |
| * 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 backtype.storm.utils; |
| |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.util.Arrays; |
| |
| |
| public class BufferFileInputStream { |
| byte[] buffer; |
| FileInputStream stream; |
| |
| public BufferFileInputStream(String file, int bufferSize) throws FileNotFoundException { |
| stream = new FileInputStream(file); |
| buffer = new byte[bufferSize]; |
| } |
| |
| public BufferFileInputStream(String file) throws FileNotFoundException { |
| this(file, 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); |
| } |
| } |
| |
| public void close() throws IOException { |
| stream.close(); |
| } |
| } |