Module org.apache.lucene.backward_codecs
Package org.apache.lucene.backward_codecs.packed

Class LegacyPacked64

java.lang.Object
org.apache.lucene.util.packed.PackedInts.Reader
org.apache.lucene.backward_codecs.packed.LegacyPacked64
All Implemented Interfaces:
Accountable
class LegacyPacked64 extends PackedInts.Reader
Immutable version of Packed64 which is constructed from am existing DataInput.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected final int
    bitsPerValue
    bits per value.
    (package private) static final int
    BLOCK_BITS
     
    (package private) static final int
    BLOCK_SIZE
     
    private final long[]
    blocks
    Values are stores contiguously in the blocks array.
    private final int
    bpvMinusBlockSize
    Optimization: Saves one lookup in get(int).
    private final long
    maskRight
    A right-aligned mask of width BitsPerValue used by get(int).
    (package private) static final int
    MOD_MASK
     
    protected final int
    valueCount
    number of values

    Fields inherited from interface org.apache.lucene.util.Accountable

    NULL_ACCOUNTABLE

  • Constructor Summary

    Constructors
    Constructor
    Description
    LegacyPacked64(int packedIntsVersion, DataInput in, int valueCount, int bitsPerValue)
    Creates an array with content retrieved from the given DataInput.

  • Method Summary

    Modifier and Type
    Method
    Description
    long
    get(int index)
    Get the long at the given index.
    int
    get(int index, long[] arr, int off, int len)
    Bulk get: read at least one and at most len longs starting from index into arr[off:off+len] and return the actual number of values that have been read.
    long
    ramBytesUsed()
    Return the memory usage of this object in bytes.
    final int
    size()
     
    String
    toString()
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    Methods inherited from interface org.apache.lucene.util.Accountable

    getChildResources

  • Field Details

    • BLOCK_SIZE

      static final int BLOCK_SIZE
      See Also:

    • BLOCK_BITS

      static final int BLOCK_BITS
      See Also:

    • MOD_MASK

      static final int MOD_MASK
      See Also:

    • blocks

      private final long[] blocks
      Values are stores contiguously in the blocks array.

    • maskRight

      private final long maskRight
      A right-aligned mask of width BitsPerValue used by get(int).

    • bpvMinusBlockSize

      private final int bpvMinusBlockSize
      Optimization: Saves one lookup in get(int).

    • valueCount

      protected final int valueCount
      number of values

    • bitsPerValue

      protected final int bitsPerValue
      bits per value.

  • Constructor Details

    • LegacyPacked64

      public LegacyPacked64(int packedIntsVersion, DataInput in, int valueCount, int bitsPerValue) throws IOException
      Creates an array with content retrieved from the given DataInput.
      Parameters:
      in - a DataInput, positioned at the start of Packed64-content.
      valueCount - the number of elements.
      bitsPerValue - the number of bits available for any given value.
      Throws:
      IOException - if the values for the backing array could not be retrieved.

  • Method Details

    • size

      public final int size()
      Specified by:
      size in class PackedInts.Reader
      Returns:
      the number of values.

    • get

      public long get(int index)
      Description copied from class: PackedInts.Reader
      Get the long at the given index. Behavior is undefined for out-of-range indices.
      Specified by:
      get in class PackedInts.Reader

    • get

      public int get(int index, long[] arr, int off, int len)
      Description copied from class: PackedInts.Reader
      Bulk get: read at least one and at most len longs starting from index into arr[off:off+len] and return the actual number of values that have been read.
      Overrides:
      get in class PackedInts.Reader

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • ramBytesUsed

      public long ramBytesUsed()
      Description copied from interface: Accountable
      Return the memory usage of this object in bytes. Negative values are illegal.