Package org.apache.lucene.store

# Interface RandomAccessInput

All Known Implementing Classes:
  `BufferedIndexInput`, `ByteBuffersDataInput`, `ByteBuffersIndexInput`

public interface RandomAccessInput
Random Access Index API. Unlike `IndexInput`, this has no concept of file position, all reads are absolute. However, like IndexInput, it is only intended for use by a single thread.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `default Optional<Boolean>`
  `isLoaded()`
  Returns a hint whether all the contents of this input are resident in physical memory.
  `long`
  `length()`
  The number of bytes in the file.
  `default void`
  `prefetch(long offset, long length)`
  Prefetch data in the background.
  `byte`
  `readByte(long pos)`
  Reads a byte at the given position in the file
  `default void`
  `readBytes(long pos, byte[] bytes, int offset, int length)`
  Reads a specified number of bytes starting at a given position into an array at the specified offset.
  `int`
  `readInt(long pos)`
  Reads an integer (LE byte order) at the given position in the file
  `long`
  `readLong(long pos)`
  Reads a long (LE byte order) at the given position in the file
  `short`
  `readShort(long pos)`
  Reads a short (LE byte order) at the given position in the file

- ## Method Details

  - ### length

    long length()
    The number of bytes in the file.

  - ### readByte

    byte readByte(long pos) throws IOException
    Reads a byte at the given position in the file
    Throws:
      `IOException`
    See Also:
      - `DataInput.readByte()`

  - ### readBytes

    default void readBytes(long pos, byte[] bytes, int offset, int length) throws IOException
    Reads a specified number of bytes starting at a given position into an array at the specified offset.
    Throws:
      `IOException`
    See Also:
      - `DataInput.readBytes(byte[], int, int)`

  - ### readShort

    short readShort(long pos) throws IOException
    Reads a short (LE byte order) at the given position in the file
    Throws:
      `IOException`
    See Also:
      - `DataInput.readShort()`
      - `BitUtil.VH_LE_SHORT`

  - ### readInt

    int readInt(long pos) throws IOException
    Reads an integer (LE byte order) at the given position in the file
    Throws:
      `IOException`
    See Also:
      - `DataInput.readInt()`
      - `BitUtil.VH_LE_INT`

  - ### readLong

    long readLong(long pos) throws IOException
    Reads a long (LE byte order) at the given position in the file
    Throws:
      `IOException`
    See Also:
      - `DataInput.readLong()`
      - `BitUtil.VH_LE_LONG`

  - ### prefetch

    default void prefetch(long offset, long length) throws IOException
    Prefetch data in the background.
    Throws:
      `IOException`
    See Also:
      - `IndexInput.prefetch(long, long)`

  - ### isLoaded

    default Optional<Boolean> isLoaded()
    Returns a hint whether all the contents of this input are resident in physical memory.
    See Also:
      - `IndexInput.isLoaded()`