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.FilterInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  
  /**
   * This class is to track bytes read from given DataInputStream
   */
  public class TrackedInputStream extends FilterInputStream implements BytesReadTracker
  {
      private long bytesRead;
  
      public TrackedInputStream(InputStream source)
      {
          super(source);
      }
  
      public long getBytesRead()
      {
          return bytesRead;
      }
  
      /**
       * reset counter to @param count
       */
      public void reset(long count)
      {
          bytesRead = count;
      }
  
      public int read() throws IOException
      {
          int read = super.read();
          bytesRead += 1;
          return read;
      }
  
      public int read(byte[] b, int off, int len) throws IOException
      {
          int read = super.read(b, off, len);
          bytesRead += read;
          return read;
      }
  
      public int read(byte[] b) throws IOException
      {
          int read = super.read(b);
          bytesRead += read;
          return read;
      }
  
      public long skip(long n) throws IOException
      {
          long skip = super.skip(n);
          bytesRead += skip;
          return skip;
      }
  }
  