ByteRowKeyComparator (druid-processing 28.0.0 API)

java.lang.Object
- org.apache.druid.frame.key.ByteRowKeyComparator

All Implemented Interfaces:

Comparator<byte[]>
```
public class ByteRowKeyComparator
extends Object
implements Comparator<byte[]>
```
Comparator for byte arrays from RowKey.key instances. Comparison logic in this class is very similar to FrameComparisonWidget, but is different because it works on byte[] instead of Frames.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`compare(byte[] keyArray1, byte[] keyArray2)`
`static int[]`	`computeAscDescRunLengths(List<KeyColumn> keyColumns)`	Given a list of sort columns, compute an array of the number of ascending fields in a run, followed by number of descending fields in a run, followed by ascending, etc.
`static int`	`computeFirstFieldPosition(int fieldCount)`	Compute the offset into each key where the first field starts.
`static ByteRowKeyComparator`	`create(List<KeyColumn> keyColumns)`
`boolean`	`equals(Object o)`
`int`	`hashCode()`
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Comparator
reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

- Method Detail
  - create
```
public static ByteRowKeyComparator create(List<KeyColumn> keyColumns)
```
  - computeFirstFieldPosition
```
public static int computeFirstFieldPosition(int fieldCount)
```
    Compute the offset into each key where the first field starts. Public so FrameComparisonWidgetImpl can use it.
  - computeAscDescRunLengths
```
public static int[] computeAscDescRunLengths(List<KeyColumn> keyColumns)
```
    Given a list of sort columns, compute an array of the number of ascending fields in a run, followed by number of descending fields in a run, followed by ascending, etc. For example: ASC, ASC, DESC, ASC would return [2, 1, 1] and DESC, DESC, ASC would return [0, 2, 1]. Public so FrameComparisonWidgetImpl can use it.
  - compare
```
public int compare(byte[] keyArray1,
                   byte[] keyArray2)
```
    Specified by:
    
    compare in interface Comparator<byte[]>
  - equals
```
public boolean equals(Object o)
```
    Specified by:
    
    equals in interface Comparator<byte[]>
    
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object