org.apache.lucene.util

## Class BytesRefComparator

- java.lang.Object
- - org.apache.lucene.util.BytesRefComparator

- All Implemented Interfaces:
    Comparator<BytesRef>

      public abstract class BytesRefComparator
      extends Object
      implements Comparator<BytesRef>

  Specialized `BytesRef` comparator that `FixedLengthBytesRefArray.iterator(Comparator)` has optimizations for.
  NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

- - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `BytesRefComparator(int comparedBytesCount)` Sole constructor.

  - ### Method Summary

    All Methods Instance Methods Abstract Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected abstract int` | `byteAt(BytesRef ref, int i)` Return the unsigned byte to use for comparison at index `i`, or `-1` if all bytes that are useful for comparisons are exhausted.
    `int` | `compare(BytesRef o1, BytesRef o2)`

    - ### Methods inherited from class java.lang.Object

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

    - ### Methods inherited from interface java.util.Comparator

      `comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong`

- - ### Constructor Detail

    - #### BytesRefComparator

          protected BytesRefComparator(int comparedBytesCount)

      Sole constructor.
      Parameters:
        `comparedBytesCount` - the maximum number of bytes to compare.

  - ### Method Detail

    - #### byteAt

          protected abstract int byteAt(BytesRef ref,
                                        int i)

      Return the unsigned byte to use for comparison at index `i`, or `-1` if all bytes that are useful for comparisons are exhausted. This may only be called with a value of `i` between `0` included and `comparedBytesCount` excluded.

    - #### compare

          public int compare(BytesRef o1,
                             BytesRef o2)

      Specified by:
        `compare` in interface `Comparator<BytesRef>`

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