io.druid.java.util.common.guava

Class FunctionalIterator<T>

java.lang.Object

io.druid.java.util.common.guava.FunctionalIterator<T>

All Implemented Interfaces:

Iterator<T>

public class FunctionalIterator<T>
extends Object
implements Iterator<T>

Constructor Summary

Constructors

Constructor and Description
FunctionalIterator(Iterator<T> delegate)

Method Summary

Modifier and Type	Method and Description
<InType,RetType> FunctionalIterator<RetType>	binaryTransform(Iterator<InType> otherIterator, BinaryFn<T,InType,RetType> binaryFn)
FunctionalIterator<T>	concat(Iterator<Iterator<T>> toConcat)
FunctionalIterator<T>	concat(Iterator<T>... toConcat)
static <T> FunctionalIterator<T>	create(Iterator<T> delegate)
FunctionalIterator<T>	drop(int numToDrop)
FunctionalIterator<T>	filter(com.google.common.base.Predicate<T> pred)
static <T> FunctionalIterator<T>	fromConcatenation(Iterator<Iterator<T>> toConcat)
static <T> FunctionalIterator<T>	fromConcatenation(Iterator<T>... toConcat)
boolean	hasNext()
<RetType> FunctionalIterator<RetType>	keep(com.google.common.base.Function<T,RetType> fn)
FunctionalIterator<T>	limit(int limit)
T	next()
void	remove()
<RetType> FunctionalIterator<RetType>	transform(com.google.common.base.Function<T,RetType> fn)
<RetType> FunctionalIterator<RetType>	transformCat(com.google.common.base.Function<T,Iterator<RetType>> fn)
<InType1,InType2,RetType> FunctionalIterator<RetType>	trinaryTransform(Iterator<InType1> iterator1, Iterator<InType2> iterator2, TrinaryFn<T,InType1,InType2,RetType> trinaryFn)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

FunctionalIterator

public FunctionalIterator(Iterator<T> delegate)

Method Detail

create

public static <T> FunctionalIterator<T> create(Iterator<T> delegate)

fromConcatenation

public static <T> FunctionalIterator<T> fromConcatenation(Iterator<T>... toConcat)

fromConcatenation

public static <T> FunctionalIterator<T> fromConcatenation(Iterator<Iterator<T>> toConcat)

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T>

next

public T next()

Specified by:

next in interface Iterator<T>

remove

public void remove()

Specified by:

remove in interface Iterator<T>

transform

public <RetType> FunctionalIterator<RetType> transform(com.google.common.base.Function<T,RetType> fn)

transformCat

public <RetType> FunctionalIterator<RetType> transformCat(com.google.common.base.Function<T,Iterator<RetType>> fn)

keep

public <RetType> FunctionalIterator<RetType> keep(com.google.common.base.Function<T,RetType> fn)

filter

public FunctionalIterator<T> filter(com.google.common.base.Predicate<T> pred)

drop

public FunctionalIterator<T> drop(int numToDrop)

limit

public FunctionalIterator<T> limit(int limit)

concat

public FunctionalIterator<T> concat(Iterator<T>... toConcat)

concat

public FunctionalIterator<T> concat(Iterator<Iterator<T>> toConcat)

binaryTransform

public <InType,RetType> FunctionalIterator<RetType> binaryTransform(Iterator<InType> otherIterator,
                                                                    BinaryFn<T,InType,RetType> binaryFn)

trinaryTransform

public <InType1,InType2,RetType> FunctionalIterator<RetType> trinaryTransform(Iterator<InType1> iterator1,
                                                                              Iterator<InType2> iterator2,
                                                                              TrinaryFn<T,InType1,InType2,RetType> trinaryFn)