com.espertech.esper.util

Class HashableMultiKeyComparator

java.lang.Object

com.espertech.esper.util.HashableMultiKeyComparator

All Implemented Interfaces:

MetaDefItem, java.io.Serializable, java.util.Comparator<HashableMultiKey>

public final class HashableMultiKeyComparator
extends java.lang.Object
implements java.util.Comparator<HashableMultiKey>, MetaDefItem, java.io.Serializable

A comparator on multikeys. The multikeys must contain the same number of values.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
HashableMultiKeyComparator(boolean[] isDescendingValues) Ctor.

Method Summary

Modifier and Type	Method and Description
int	compare(HashableMultiKey firstValues, HashableMultiKey secondValues)
protected static int	compareValues(java.lang.Object valueOne, java.lang.Object valueTwo, boolean isDescending) Compares two nullable values.

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

HashableMultiKeyComparator

public HashableMultiKeyComparator(boolean[] isDescendingValues)

Ctor.

Parameters:

isDescendingValues - - each value is true if the corresponding (same index) entry in the multi-keys is to be sorted in descending order. The multikeys to be compared must have the same number of values as this array.

Method Detail

compare

public final int compare(HashableMultiKey firstValues,
                         HashableMultiKey secondValues)

Specified by:

compare in interface java.util.Comparator<HashableMultiKey>

compareValues

protected static int compareValues(java.lang.Object valueOne,
                                   java.lang.Object valueTwo,
                                   boolean isDescending)

Compares two nullable values.

Parameters:

valueOne - first value to compare

valueTwo - second value to compare

isDescending - true for descending

Returns:

compare result