Package jetbrains.mps.util

Class IterableUtil

java.lang.Object

jetbrains.mps.util.IterableUtil

public class IterableUtil
extends Object

Constructor Summary

Constructors

Constructor	Description
IterableUtil()

Method Summary

Modifier and Type	Method	Description
static <T> Collection<T>	asCollection(Iterable<? extends T> iter)	FIXME: conversion of wildcard type to its upper bound breaks container's contract See IterableUtil.asSet()
static <T> Iterable<T>	asIterable(Iterator<T> it)	FIXME: as there is no way to reset the iterator, the returned Iterable can only be iterated once
static <T> List<T>	asList(Iterable<? extends T> iter)	FIXME: conversion of wildcard type to its upper bound breaks container's contract See IterableUtil.asSet()
static <T> Set<T>	asSet(Iterable<? extends T> iter)	FIXME: conversion of wildcard type to its upper bound breaks container's contract Example:
static <T> List<T>	copyToList(Iterable<? extends T> iter)
static <T> Iterable<T>	distinct(Iterable<T> t)
static <T> T	get(Iterable<? extends T> data, int index)
static <T> int	indexOf(Iterable<? extends T> data, T element)
static <T> Iterable<T>	merge(Iterable<T>... its)

Methods inherited from class java.lang.Object

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

Constructor Detail

IterableUtil

public IterableUtil()

Method Detail

distinct

@NotNull
public static <T> Iterable<T> distinct(@Nullable
                                       Iterable<T> t)

merge

@NotNull
public static <T> Iterable<T> merge(@NotNull
                                    Iterable<T>... its)

asSet

@NotNull
public static <T> Set<T> asSet(@Nullable
                               Iterable<? extends T> iter)

FIXME: conversion of wildcard type to its upper bound breaks container's contract Example:

class A {}; class B extends A {}

Set sob = new HashSet();

Iterable<? extends A> ioa = sob;

Set soa = IterableUtil.asSet(ioa); soa.add(new A());

B b = sob.iterator().next(); // ClassCastException

asCollection

@NotNull
public static <T> Collection<T> asCollection(@Nullable
                                             Iterable<? extends T> iter)

FIXME: conversion of wildcard type to its upper bound breaks container's contract See IterableUtil.asSet()

asList

@NotNull
public static <T> List<T> asList(@Nullable
                                 Iterable<? extends T> iter)

FIXME: conversion of wildcard type to its upper bound breaks container's contract See IterableUtil.asSet()

copyToList

@NotNull
public static <T> List<T> copyToList(@Nullable
                                     Iterable<? extends T> iter)

asIterable

@NotNull
public static <T> Iterable<T> asIterable(@Nullable
                                         Iterator<T> it)

FIXME: as there is no way to reset the iterator, the returned Iterable can only be iterated once

get

public static <T> T get(@Nullable
                        Iterable<? extends T> data,
                        int index)

indexOf

public static <T> int indexOf(Iterable<? extends T> data,
                              T element)