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 org.apache.cassandra.io.util;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.nio.channels.FileChannel;
  import java.nio.file.NoSuchFileException;
  import java.nio.file.Path;
  
  import org.apache.cassandra.utils.memory.MemoryUtil;
  
  public class FileInputStreamPlus extends RebufferingInputStream
  {
      final FileChannel channel;
      public final File file;
  
      public FileInputStreamPlus(String file) throws NoSuchFileException
      {
          this(new File(file));
      }
  
      public FileInputStreamPlus(Path path) throws NoSuchFileException
      {
          this(new File(path));
      }
  
      public FileInputStreamPlus(File file) throws NoSuchFileException
      {
          this(file, 1 << 14);
      }
  
      public FileInputStreamPlus(File file, int bufferSize) throws NoSuchFileException
      {
          super(ByteBuffer.allocateDirect(bufferSize));
          this.channel = file.newReadChannel();
          this.buffer.limit(0);
          this.file = file;
      }
  
      @Override
      protected void reBuffer() throws IOException
      {
          buffer.clear();
          channel.read(buffer);
          buffer.flip();
      }
  
      public FileChannel getChannel()
      {
          return channel;
      }
  
      @Override
      public void close() throws IOException
      {
          try
          {
              super.close();
          }
          finally
          {
              try
              {
                  MemoryUtil.clean(buffer);
              }
              finally
              {
                  channel.close();
              }
          }
      }
  }
  