com.tinkerpop.gremlin.util.iterator

Class IteratorUtils

java.lang.Object

com.tinkerpop.gremlin.util.iterator.IteratorUtils

public class IteratorUtils
extends java.lang.Object

Author:

Marko A. Rodriguez (http://markorodriguez.com)

Constructor Summary

Constructors

Constructor and Description
IteratorUtils()

Method Summary

Modifier and Type	Method and Description
static <K,S> java.util.Map<K,S>	collectMap(java.util.Iterator<S> iterator, java.util.function.Function<S,K> key)
static <K,S,V> java.util.Map<K,V>	collectMap(java.util.Iterator<S> iterator, java.util.function.Function<S,K> key, java.util.function.Function<S,V> value)
static <S> java.util.Iterator<S>	concat(java.util.Iterator<S>... iterators)
static java.util.Iterator	convertToIterator(java.lang.Object o)
static java.util.List	convertToList(java.lang.Object o)
static long	count(java.util.Iterator iterator)
static <S extends java.util.Collection<T>,T> S	fill(java.util.Iterator<T> iterator, S collection)
static <S> java.lang.Iterable<S>	filter(java.lang.Iterable<S> iterable, java.util.function.Predicate<S> predicate)
static <S> java.util.Iterator<S>	filter(java.util.Iterator<S> iterator, java.util.function.Predicate<S> predicate)
static <K,S> java.util.Map<K,java.util.List<S>>	groupBy(java.util.Iterator<S> iterator, java.util.function.Function<S,K> groupBy)
static <S> java.util.List<S>	list(java.util.Iterator<S> iterator)
static <S,E> java.lang.Iterable<E>	map(java.lang.Iterable<S> iterable, java.util.function.Function<S,E> function)
static <S,E> java.util.Iterator<E>	map(java.util.Iterator<S> iterator, java.util.function.Function<S,E> function)
static <S> java.util.Iterator<S>	of(S a)
static <S> java.util.Iterator<S>	of(S a, S b)

Methods inherited from class java.lang.Object

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

Constructor Detail

IteratorUtils

public IteratorUtils()

Method Detail

of

public static final <S> java.util.Iterator<S> of(S a)

of

public static final <S> java.util.Iterator<S> of(S a,
                                                 S b)

convertToIterator

public static java.util.Iterator convertToIterator(java.lang.Object o)

convertToList

public static java.util.List convertToList(java.lang.Object o)

fill

public static final <S extends java.util.Collection<T>,T> S fill(java.util.Iterator<T> iterator,
                                                                 S collection)

count

public static final long count(java.util.Iterator iterator)

list

public static <S> java.util.List<S> list(java.util.Iterator<S> iterator)

collectMap

public static <K,S> java.util.Map<K,S> collectMap(java.util.Iterator<S> iterator,
                                                  java.util.function.Function<S,K> key)

collectMap

public static <K,S,V> java.util.Map<K,V> collectMap(java.util.Iterator<S> iterator,
                                                    java.util.function.Function<S,K> key,
                                                    java.util.function.Function<S,V> value)

groupBy

public static <K,S> java.util.Map<K,java.util.List<S>> groupBy(java.util.Iterator<S> iterator,
                                                               java.util.function.Function<S,K> groupBy)

map

public static final <S,E> java.util.Iterator<E> map(java.util.Iterator<S> iterator,
                                                    java.util.function.Function<S,E> function)

map

public static final <S,E> java.lang.Iterable<E> map(java.lang.Iterable<S> iterable,
                                                    java.util.function.Function<S,E> function)

filter

public static final <S> java.util.Iterator<S> filter(java.util.Iterator<S> iterator,
                                                     java.util.function.Predicate<S> predicate)

filter

public static final <S> java.lang.Iterable<S> filter(java.lang.Iterable<S> iterable,
                                                     java.util.function.Predicate<S> predicate)

concat

public static final <S> java.util.Iterator<S> concat(java.util.Iterator<S>... iterators)