Package org.apache.lucene.codecs.lucene84

Class ForDeltaUtil

  • public class ForDeltaUtil
extends java.lang.Object
    Utility class to encode/decode increasing sequences of 128 integers.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      (package private) void decodeAndPrefixSum​(DataInput in, long base, long[] longs)
      Decode deltas, compute the prefix sum and add base to all decoded longs.
      (package private) void encodeDeltas​(long[] longs, DataOutput out)
      Encode deltas of a strictly monotonically increasing sequence of integers.
      private static void prefixSumOfOnes​(long[] arr, long base)  
      (package private) void skip​(DataInput in)
      Skip a sequence of 128 longs.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • IDENTITY_PLUS_ONE

        private static final long[] IDENTITY_PLUS_ONE

      • forUtil

        private final ForUtil forUtil

    • Constructor Detail

      • ForDeltaUtil

        ForDeltaUtil​(ForUtil forUtil)

    • Method Detail

      • prefixSumOfOnes

        private static void prefixSumOfOnes​(long[] arr,
                                    long base)

      • encodeDeltas

        void encodeDeltas​(long[] longs,
                  DataOutput out)
           throws java.io.IOException
        Encode deltas of a strictly monotonically increasing sequence of integers. The provided longs are expected to be deltas between consecutive values.
        Throws:
        java.io.IOException

      • decodeAndPrefixSum

        void decodeAndPrefixSum​(DataInput in,
                        long base,
                        long[] longs)
                 throws java.io.IOException
        Decode deltas, compute the prefix sum and add base to all decoded longs.
        Throws:
        java.io.IOException

      • skip

        void skip​(DataInput in)
   throws java.io.IOException
        Skip a sequence of 128 longs.
        Throws:
        java.io.IOException