Class IteratorUtils

java.lang.Object

net.thevpc.common.iterators.IteratorUtils

public class IteratorUtils
extends Object

Author:

thevpc

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	IteratorUtils.NonNullFilter<T>

Field Summary

Fields

Modifier and Type	Field	Description
static final Predicate<String>	NON_BLANK
static final IteratorUtils.NonNullFilter	NON_NULL

Constructor Summary

Constructors

Constructor	Description
IteratorUtils()

Method Summary

Modifier and Type	Method	Description
static <T> Iterator<T>	coalesce(List<Iterator<T>> all)
static <T> Iterator<T>	coalesceIterators(Iterator<T> a, Iterator<T> b)
static <T> Iterator<T>	concat(List<Iterator<T>> all)
static <T> Iterator<T>	concatIterators(Iterator<T> a, Iterator<T> b)
static <F,T> Iterator<T>	convert(Iterator<F> from, Function<F,T> converter, String name)
static <F,T> Iterator<T>	convertNonNull(Iterator<F> from, Function<F,T> converter, String name)
static <F,T> Iterator<F>	distinct(Iterator<F> it, Function<F,T> converter)
static <T> Iterator<T>	distinct(Iterator<T> it)
static FileDepthFirstIterator	dsf(File file)
static <T> Iterator<T>	emptyIterator()
static <T> Iterator<T>	filter(Iterator<T> from, Predicate<T> filter)
static <T> Iterator<T>	flatten(Iterator<Collection<T>> from)
static <T> boolean	isNullOrEmpty(Iterator<T> t)
static <T> Iterator<T>	name(String name, Iterator<T> from)
static <T> Iterator<T>	nonNull(Iterator<T> t)
static <T> Iterator<T>	nullifyIfEmpty(Iterator<T> other)
static <T> Iterator<T>	onFinish(Iterator<T> from, Runnable r)
static <T> Iterator<T>	safe(IteratorErrorHandlerType type, Iterator<T> t)
static <T> Iterator<T>	safeIgnore(Iterator<T> t)
static <T> Iterator<T>	safePospone(Iterator<T> t)
static <T> Iterator<T>	sort(Iterator<T> it, Comparator<T> c, boolean removeDuplicates)
static <T> Iterator<T>	supplier(Supplier<Iterator<T>> from)
static <T> Iterator<T>	supplier(Supplier<Iterator<T>> from, String name)
static <T> List<T>	toList(Iterator<T> it)
static <T> Set<T>	toSet(Iterator<T> it)
static <T> Set<T>	toTreeSet(Iterator<T> it, Comparator<T> c)

Methods inherited from class Object

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

Field Details

NON_NULL

public static final IteratorUtils.NonNullFilter NON_NULL

NON_BLANK

public static final Predicate<String> NON_BLANK

Constructor Details

IteratorUtils

public IteratorUtils()

Method Details

dsf

public static FileDepthFirstIterator dsf(File file)

safe

public static <T> Iterator<T> safe(IteratorErrorHandlerType type,
 Iterator<T> t)

safeIgnore

public static <T> Iterator<T> safeIgnore(Iterator<T> t)

safePospone

public static <T> Iterator<T> safePospone(Iterator<T> t)

isNullOrEmpty

public static <T> boolean isNullOrEmpty(Iterator<T> t)

emptyIterator

public static <T> Iterator<T> emptyIterator()

nonNull

public static <T> Iterator<T> nonNull(Iterator<T> t)

concat

public static <T> Iterator<T> concat(List<Iterator<T>> all)

coalesce

public static <T> Iterator<T> coalesce(List<Iterator<T>> all)

filter

public static <T> Iterator<T> filter(Iterator<T> from,
 Predicate<T> filter)

name

public static <T> Iterator<T> name(String name,
 Iterator<T> from)

flatten

public static <T> Iterator<T> flatten(Iterator<Collection<T>> from)

supplier

public static <T> Iterator<T> supplier(Supplier<Iterator<T>> from)

supplier

public static <T> Iterator<T> supplier(Supplier<Iterator<T>> from,
 String name)

onFinish

public static <T> Iterator<T> onFinish(Iterator<T> from,
 Runnable r)

convert

public static <F,T> Iterator<T> convert(Iterator<F> from,
 Function<F,T> converter,
 String name)

convertNonNull

public static <F,T> Iterator<T> convertNonNull(Iterator<F> from,
 Function<F,T> converter,
 String name)

toList

public static <T> List<T> toList(Iterator<T> it)

toSet

public static <T> Set<T> toSet(Iterator<T> it)

toTreeSet

public static <T> Set<T> toTreeSet(Iterator<T> it,
 Comparator<T> c)

sort

public static <T> Iterator<T> sort(Iterator<T> it,
 Comparator<T> c,
 boolean removeDuplicates)

distinct

public static <T> Iterator<T> distinct(Iterator<T> it)

distinct

public static <F,T> Iterator<F> distinct(Iterator<F> it,
 Function<F,T> converter)

concatIterators

public static <T> Iterator<T> concatIterators(Iterator<T> a,
 Iterator<T> b)

coalesceIterators

public static <T> Iterator<T> coalesceIterators(Iterator<T> a,
 Iterator<T> b)

nullifyIfEmpty

public static <T> Iterator<T> nullifyIfEmpty(Iterator<T> other)