Package com.djrapitops.plan.utilities.java

Class Lists

java.lang.Object

com.djrapitops.plan.utilities.java.Lists

public class Lists
extends Object

Methods that can be used as functional interfaces when dealing with Maps.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Lists.Builder<V>

Method Summary

Modifier and Type	Method	Description
static <V> Lists.Builder<V>	builder(Class<V> ofType)
static <V, K> List<V>	create(K key)
static <T extends V, V> List<T>	filter(Collection<T> original, Predicate<V> keep)	Efficient replacement for List#stream().filter(keep).collect(Collectors.toList()).
static <A, B> List<B>	map(Collection<A> original, Function<A,B> mapper)	Efficient replacement for List#stream().map(mapper).collect(Collectors.toList()).
static <A, B> Set<B>	mapUnique(Collection<A> original, Function<A,B> mapper)	Efficient replacement for List#stream().map(mapper).collect(Collectors.toSet()).

Methods inherited from class java.lang.Object

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

Method Details

create

public static <V,
K> List<V> create(K key)

builder

public static <V> Lists.Builder<V> builder(Class<V> ofType)

filter

public static <T extends V,
V> List<T> filter(Collection<T> original,
 Predicate<V> keep)

Efficient replacement for List#stream().filter(keep).collect(Collectors.toList()).

Type Parameters:

T - Type of the list objects

V - Supertype for T if exists, T if not

Parameters:

original - Original list

keep - Condition for keeping on the list

Returns:

List with elements in original that keep returned true for.

map

public static <A,
B> List<B> map(Collection<A> original,
 Function<A,B> mapper)

Efficient replacement for List#stream().map(mapper).collect(Collectors.toList()).

Type Parameters:

A - Type of the old list objects

B - Type of the new list objects

Parameters:

original - Original list

mapper - Function to change object of type A to type B

Returns:

List with elements in original that keep returned true for.

mapUnique

public static <A,
B> Set<B> mapUnique(Collection<A> original,
 Function<A,B> mapper)

Efficient replacement for List#stream().map(mapper).collect(Collectors.toSet()).

Type Parameters:

A - Type of the old list objects

B - Type of the new list objects

Parameters:

original - Original list

mapper - Function to change object of type A to type B

Returns:

List with elements in original that keep returned true for.