Package org.eclipse.xtext.xbase.lib.internal

Class KeyComparator<T,C extends Comparable<? super C>>

java.lang.Object

org.eclipse.xtext.xbase.lib.internal.KeyComparator<T,C>

Type Parameters:

T - the type to compare

C - the type of the comparable key

All Implemented Interfaces:

Comparator<T>

@GwtCompatible
public final class KeyComparator<T,C extends Comparable<? super C>>
extends Object
implements Comparator<T>

A comparator that compares objects by calling the supplied key function on them and then comparing the resulting keys. It is null-safe if the key's compareTo method is null-safe.

Constructor Summary

Constructors

Constructor	Description
KeyComparator(Functions.Function1<? super T,C> keyFunction)

Method Summary

Modifier and Type	Method	Description
int	compare(T a, T b)

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

equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Details

KeyComparator

public KeyComparator(Functions.Function1<? super T,C> keyFunction)

Parameters:

keyFunction - the key function to use for comparing objects. May not be null

Method Details

compare

public int compare(T a,
 T b)

Specified by:

compare in interface Comparator<T>