org.qi4j.api.util
Class Iterables

java.lang.Object
  org.qi4j.api.util.Iterables

public class Iterables
extends Object

Utility methods for working with Iterables. See test for examples of how to use.

Constructor Summary

Iterables()

Method Summary

static <T,C extends Collection<T>> C	addAll(C collection, Iterable<? extends T> iterable)
static long	count(Iterable<?> iterable)
static <X> Iterable<X>	filter(Specification<? super X> specification, Iterable<X> i)
static <X> X	first(Iterable<? extends X> i)
static <X,I extends Iterable<? extends X>> Iterable<X>	flatten(I... multiIterator)
static <X,I extends Iterable<? extends X>> Iterable<X>	flattenIterables(Iterable<I> multiIterator)
static <FROM,TO> TO	fold(Function<? super FROM,TO> function, Iterable<? extends FROM> i)
static <T,C extends T> Iterable<T>	iterable(C... items)
static <T> Iterable<T>	iterable(Enumeration<T> enumeration)
static <X> X	last(Iterable<? extends X> i)
static <FROM,TO> Iterable<TO>	map(Function<? super FROM,TO> function, Iterable<FROM> from)
static <T> boolean	matchesAll(Specification<? super T> specification, Iterable<T> iterable)
static <T> boolean	matchesAny(Specification<? super T> specification, Iterable<T> iterable)
static <X> Iterable<X>	reverse(Iterable<X> iterable)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Iterables

public Iterables()

Method Detail

addAll

public static <T,C extends Collection<T>> C addAll(C collection,
                                                   Iterable<? extends T> iterable)

count

public static long count(Iterable<?> iterable)

filter

public static <X> Iterable<X> filter(Specification<? super X> specification,
                                     Iterable<X> i)

first

public static <X> X first(Iterable<? extends X> i)

last

public static <X> X last(Iterable<? extends X> i)

reverse

public static <X> Iterable<X> reverse(Iterable<X> iterable)

matchesAny

public static <T> boolean matchesAny(Specification<? super T> specification,
                                     Iterable<T> iterable)

matchesAll

public static <T> boolean matchesAll(Specification<? super T> specification,
                                     Iterable<T> iterable)

flatten

public static <X,I extends Iterable<? extends X>> Iterable<X> flatten(I... multiIterator)

flattenIterables

public static <X,I extends Iterable<? extends X>> Iterable<X> flattenIterables(Iterable<I> multiIterator)

map

public static <FROM,TO> Iterable<TO> map(Function<? super FROM,TO> function,
                                         Iterable<FROM> from)

iterable

public static <T> Iterable<T> iterable(Enumeration<T> enumeration)

iterable

public static <T,C extends T> Iterable<T> iterable(C... items)

fold

public static <FROM,TO> TO fold(Function<? super FROM,TO> function,
                                Iterable<? extends FROM> i)