pl.jalokim.utils.collection

Class Elements<T>

java.lang.Object

pl.jalokim.utils.collection.Elements<T>

Type Parameters:

T - type of elements.

public final class Elements<T>
extends Object

Simpler API than native java Stream API. Contains some shortcut methods for return some types.

Method Summary

Modifier and Type	Method and Description
T[]	asArray(T[] array)
List<T>	asList()
<K> Map<K,T>	asMap(Function<? super T,? extends K> keyMapper)
<K,V> Map<K,V>	asMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends V> valueMapper)
Set<T>	asSet()
Stream<T>	asStream()
String	asText() Concatenate all elements in stream to String.
String	asText(String joinText) Concatenate all elements in stream to String with join text.
static <T> Elements<T>	elements(Iterable<T> iterable)
static <T> Elements<T>	elements(Stream<T> stream)
static <T> Elements<T>	elements(T... array)
Elements<T>	filter(Predicate<T> predicate)
<R> Elements<R>	flatMap(Function<? super T,? extends Stream<? extends R>> mapper)
void	forEach(BiConsumer<Integer,T> consumer) For each with index and element.
void	forEach(Consumer<IndexedElement<T>> consumer) For each with index and element and useful method isFirst, isLast.
T	getFirst()
T	getLast()
<R> Elements<R>	map(Function<? super T,? extends R> mapper)
String	toString() Concatenate all elements in stream to String.

Methods inherited from class java.lang.Object

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

Method Detail

elements

public static <T> Elements<T> elements(Iterable<T> iterable)

elements

public static <T> Elements<T> elements(T... array)

elements

public static <T> Elements<T> elements(Stream<T> stream)

filter

public Elements<T> filter(Predicate<T> predicate)

map

public <R> Elements<R> map(Function<? super T,? extends R> mapper)

flatMap

public <R> Elements<R> flatMap(Function<? super T,? extends Stream<? extends R>> mapper)

getFirst

public T getFirst()

getLast

public T getLast()

asList

public List<T> asList()

asSet

public Set<T> asSet()

asMap

public <K> Map<K,T> asMap(Function<? super T,? extends K> keyMapper)

asMap

public <K,V> Map<K,V> asMap(Function<? super T,? extends K> keyMapper,
                            Function<? super T,? extends V> valueMapper)

asArray

public T[] asArray(T[] array)

asStream

public Stream<T> asStream()

toString

public String toString()

Concatenate all elements in stream to String.

Overrides:

toString in class Object

Returns:

elements separated ', ' (comma and space) argument within '[element[0], element[1]...]'

asText

public String asText(String joinText)

Concatenate all elements in stream to String with join text.

Parameters:

joinText - text between every element

Returns:

elements separated join text argument within '[element[0]${JOIN_TEXT}element[1]...]'

asText

public String asText()

Concatenate all elements in stream to String.

Returns:

elements separated ', ' (comma and space) argument within '[element[0], element[1]...]'

forEach

public void forEach(BiConsumer<Integer,T> consumer)

For each with index and element.

Parameters:

consumer - consumer of index and element.

forEach

public void forEach(Consumer<IndexedElement<T>> consumer)

For each with index and element and useful method isFirst, isLast.

Parameters:

consumer - for IndexedElement which holds element with T type and index