# Hierarchy For Package org.apache.cassandra.io.util

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - org.apache.cassandra.io.util.DataIntegrityMetadata
  - org.apache.cassandra.io.util.DataIntegrityMetadata.ChecksumValidator (implements java.io.Closeable)
  - org.apache.cassandra.io.util.DataIntegrityMetadata.ChecksumWriter
  - org.apache.cassandra.io.util.DataIntegrityMetadata.FileDigestValidator (implements java.io.Closeable)
  - org.apache.cassandra.io.util.FileUtils
  - java.io.InputStream (implements java.io.Closeable)
    - org.apache.cassandra.io.util.AbstractDataInput (implements java.io.DataInput)
      - org.apache.cassandra.io.util.ByteBufferDataInput (implements java.io.DataInput, org.apache.cassandra.io.util.FileDataInput)
      - org.apache.cassandra.io.util.MemoryInputStream (implements java.io.DataInput)
      - org.apache.cassandra.io.util.RandomAccessReader (implements org.apache.cassandra.io.util.FileDataInput)
        - org.apache.cassandra.io.util.ChecksummedRandomAccessReader
        - org.apache.cassandra.io.util.ThrottledReader
    - org.apache.cassandra.io.util.FastByteArrayInputStream
    - java.io.FilterInputStream
      - org.apache.cassandra.io.util.LengthAvailableInputStream
    - org.apache.cassandra.io.util.NIODataInputStream (implements java.io.Closeable, java.io.DataInput)
  - org.apache.cassandra.io.util.Memory (implements java.lang.AutoCloseable)
    - org.apache.cassandra.io.util.SafeMemory (implements org.apache.cassandra.utils.concurrent.SharedCloseable)
  - org.apache.cassandra.io.util.MmappedSegmentedFile.Builder.Boundaries
  - java.io.OutputStream (implements java.io.Closeable, java.io.Flushable)
    - org.apache.cassandra.io.util.DataOutputStreamPlus (implements org.apache.cassandra.io.util.DataOutputPlus)
      - org.apache.cassandra.io.util.BufferedDataOutputStreamPlus
        - org.apache.cassandra.io.util.DataOutputBuffer
          - org.apache.cassandra.io.util.DataOutputBufferFixed
          - org.apache.cassandra.io.util.SafeMemoryWriter
      - org.apache.cassandra.io.util.UnbufferedDataOutputStreamPlus
        - org.apache.cassandra.io.util.WrappedDataOutputStreamPlus
    - org.apache.cassandra.io.util.MemoryOutputStream
    - org.apache.cassandra.io.util.SequentialWriter (implements org.apache.cassandra.utils.concurrent.Transactional, java.nio.channels.WritableByteChannel)
      - org.apache.cassandra.io.util.ChecksummedSequentialWriter
  - org.apache.cassandra.io.util.RandomAccessReader.BufferedRandomAccessFileMark (implements org.apache.cassandra.io.util.FileMark)
  - org.apache.cassandra.io.util.SegmentedFile.Builder (implements java.lang.AutoCloseable)
    - org.apache.cassandra.io.util.BufferedPoolingSegmentedFile.Builder
    - org.apache.cassandra.io.util.BufferedSegmentedFile.Builder
    - org.apache.cassandra.io.util.CompressedSegmentedFile.Builder
      - org.apache.cassandra.io.util.CompressedPoolingSegmentedFile.Builder
    - org.apache.cassandra.io.util.MmappedSegmentedFile.Builder
  - org.apache.cassandra.io.util.SegmentedFile.Cleanup (implements org.apache.cassandra.utils.concurrent.RefCounted.Tidy)
    - org.apache.cassandra.io.util.PoolingSegmentedFile.Cleanup
      - org.apache.cassandra.io.util.CompressedPoolingSegmentedFile.Cleanup
  - org.apache.cassandra.io.util.SequentialWriter.BufferedFileWriterMark (implements org.apache.cassandra.io.util.FileMark)
  - org.apache.cassandra.utils.concurrent.SharedCloseableImpl (implements org.apache.cassandra.utils.concurrent.SharedCloseable)
    - org.apache.cassandra.io.util.ChannelProxy
    - org.apache.cassandra.io.util.SegmentedFile
      - org.apache.cassandra.io.util.BufferedSegmentedFile
      - org.apache.cassandra.io.util.CompressedSegmentedFile (implements org.apache.cassandra.io.util.ICompressedFile)
      - org.apache.cassandra.io.util.MmappedSegmentedFile
      - org.apache.cassandra.io.util.PoolingSegmentedFile
        - org.apache.cassandra.io.util.BufferedPoolingSegmentedFile
        - org.apache.cassandra.io.util.CompressedPoolingSegmentedFile (implements org.apache.cassandra.io.util.ICompressedFile)
  - java.lang.Throwable (implements java.io.Serializable)
    - java.lang.Exception
      - java.lang.RuntimeException
        - org.apache.cassandra.io.util.ChecksummedRandomAccessReader.CorruptFileException
  - org.apache.cassandra.utils.concurrent.Transactional.AbstractTransactional (implements org.apache.cassandra.utils.concurrent.Transactional)
    - org.apache.cassandra.io.util.SequentialWriter.TransactionalProxy
      - org.apache.cassandra.io.util.ChecksummedSequentialWriter.TransactionalProxy

## Interface Hierarchy

- java.lang.AutoCloseable
  - java.io.Closeable
    - org.apache.cassandra.io.util.FileDataInput (also extends java.io.DataInput)
- java.io.DataInput
  - org.apache.cassandra.io.util.FileDataInput (also extends java.io.Closeable)
- java.io.DataOutput
  - org.apache.cassandra.io.util.DataOutputPlus
- org.apache.cassandra.io.util.FileMark
- org.apache.cassandra.io.util.ICompressedFile