org.calrissian.mango.collect

Class Iterables2

java.lang.Object

org.calrissian.mango.collect.Iterables2

public class Iterables2
extends Object

Additional functions for working on Iterables

Method Summary

Modifier and Type	Method and Description
static <T> Iterable<T>	distinct(Iterable<T> iterable) If we can assume the iterable is sorted, return the distinct elements.
static <T> Iterable<List<T>>	groupBy(Iterable<? extends T> iterable, Function<? super T,?> groupingFunction) Divides an iterable into unmodifiable sublists of equivalent elements.
static <T> Iterable<T>	simpleIterable(Iterable<T> iterable) Wraps any iterable into a generic iterable object.

Methods inherited from class java.lang.Object

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

Method Detail

simpleIterable

public static <T> Iterable<T> simpleIterable(Iterable<T> iterable)

Wraps any iterable into a generic iterable object. This is useful for using complex iterables such as FluentIterable with libraries that use reflection to determine bean definitions such as Jackson.

distinct

public static <T> Iterable<T> distinct(Iterable<T> iterable)

If we can assume the iterable is sorted, return the distinct elements. This only works if the data provided is sorted.

groupBy

public static <T> Iterable<List<T>> groupBy(Iterable<? extends T> iterable,
                                            Function<? super T,?> groupingFunction)

Divides an iterable into unmodifiable sublists of equivalent elements. The iterable groups elements in consecutive order, forming a new partition when the value from the provided function changes. For example, grouping the iterable [1, 3, 2, 4, 5] with a function grouping even and odd numbers yields [[1, 3], [2, 4], [5] all in the original order.

The returned lists implement RandomAccess.