content: /**
   * 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.IOException;
  import java.io.InputStream;
  import java.util.Arrays;
  
  public class BufferInputStream {
      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);
          }
      }
  
      public void close() throws IOException {
          stream.close();
      }
  }
  