# 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 (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.MappedFileDataInput (implements org.apache.cassandra.io.util.FileDataInput)
      - org.apache.cassandra.io.util.MemoryInputStream
    - org.apache.cassandra.io.util.FastByteArrayInputStream
    - java.io.FilterInputStream
      - org.apache.cassandra.io.util.LengthAvailableInputStream
  - org.apache.cassandra.io.util.JEMallocAllocator (implements org.apache.cassandra.io.util.IAllocator)
  - org.apache.cassandra.io.util.Memory
  - org.apache.cassandra.io.util.NativeAllocator (implements org.apache.cassandra.io.util.IAllocator)
  - java.io.OutputStream (implements java.io.Closeable, java.io.Flushable)
    - org.apache.cassandra.io.util.AbstractDataOutput (implements java.io.DataOutput)
    - org.apache.cassandra.io.util.ByteBufferOutputStream
    - org.apache.cassandra.io.util.ChecksummedOutputStream
    - org.apache.cassandra.io.util.FastByteArrayOutputStream
    - java.io.FilterOutputStream
      - java.io.DataOutputStream (implements java.io.DataOutput)
        - org.apache.cassandra.io.util.DataOutputBuffer
    - org.apache.cassandra.io.util.MemoryOutputStream
    - org.apache.cassandra.io.util.SequentialWriter
  - java.io.RandomAccessFile (implements java.io.Closeable, java.io.DataInput, java.io.DataOutput)
    - org.apache.cassandra.io.util.RandomAccessReader (implements org.apache.cassandra.io.util.FileDataInput)
      - org.apache.cassandra.io.util.ThrottledReader
  - org.apache.cassandra.io.util.RandomAccessReader.BufferedRandomAccessFileMark (implements org.apache.cassandra.io.util.FileMark)
  - 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)
  - org.apache.cassandra.io.util.SegmentedFile.Builder
    - org.apache.cassandra.io.util.BufferedPoolingSegmentedFile.Builder
    - org.apache.cassandra.io.util.BufferedSegmentedFile.Builder
    - org.apache.cassandra.io.util.CompressedPoolingSegmentedFile.Builder
    - org.apache.cassandra.io.util.CompressedSegmentedFile.Builder
  - org.apache.cassandra.io.util.SequentialWriter.BufferedFileWriterMark (implements org.apache.cassandra.io.util.FileMark)
  - org.apache.cassandra.utils.WrappedRunnable (implements java.lang.Runnable)
    - org.apache.cassandra.io.util.DiskAwareRunnable

## 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)
- org.apache.cassandra.io.util.FileMark
- org.apache.cassandra.io.util.IAllocator
- org.apache.cassandra.io.util.ICompressedFile
- com.sun.jna.Library
  - org.apache.cassandra.io.util.JEMallocAllocator.JEMLibrary