org.dmfs.jems.comparator.decorators

Class By<T>

java.lang.Object

org.dmfs.jems.comparator.decorators.By<T>

All Implemented Interfaces:

java.util.Comparator<T>

public final class By<T>
extends java.lang.Object
implements java.util.Comparator<T>

A Comparator which compares objects by a key derived from the compared objects.

Constructor Summary

Constructors

Constructor and Description
By(Function<? super T,? extends V> keyFunction)
By(Function<? super T,? extends V> keyFunction, java.util.Comparator<? super V> delegate)

Method Summary

Modifier and Type	Method and Description
int	compare(T left, T right)

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

By

public By(Function<? super T,? extends V> keyFunction)

By

public By(Function<? super T,? extends V> keyFunction,
          java.util.Comparator<? super V> delegate)

Method Detail

compare

public int compare(T left,
                   T right)

Specified by:

compare in interface java.util.Comparator<T>