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

Method Summary

Methods

Modifier and Type	Method and 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

Constructor Detail

KeyComparator

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

Parameters:

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

Method Detail

compare

public int compare(T a,
          T b)

Specified by:

compare in interface Comparator<T>