https://github.com/eclipse/eclipse-collections/eclipse-collections-api: Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.
  • Craig P. Motlin
  • Donald Raab
  • Mohammad A. Rezaei
  • Hiroshi Ito
  • Nikhil J. Nanivadekar
  • Sirisha Pratha 
/*
 * Copyright (c) 2021 Goldman Sachs and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompany this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */

package org.eclipse.collections.api.factory.set;

import java.util.stream.Stream;

import org.eclipse.collections.api.factory.Sets;
import org.eclipse.collections.api.set.ImmutableSet;

public interface ImmutableSetFactory
{
    
Since:6.0
/**
     * @since 6.0
     */
    <T> ImmutableSet<T> empty();

    
Same as empty(). 
/**
     * Same as {@link #empty()}.
     */
    <T> ImmutableSet<T> of();

    
Same as empty(). 
/**
     * Same as {@link #empty()}.
     */
    <T> ImmutableSet<T> with();

    
Same as with(Object). 
/**
     * Same as {@link #with(Object)}.
     */
    <T> ImmutableSet<T> of(T one);

    <T> ImmutableSet<T> with(T one);

    /**
     * Same as {@link #with(Object, Object)}.
     */
    <T> ImmutableSet<T> of(T one, T two);

    <T> ImmutableSet<T> with(T one, T two);

    /**
     * Same as {@link #with(Object, Object, Object)}.
     */
    <T> ImmutableSet<T> of(T one, T two, T three);

    <T> ImmutableSet<T> with(T one, T two, T three);

    /**
     * Same as {@link #with(Object, Object, Object, Object)}.
     */
    <T> ImmutableSet<T> of(T one, T two, T three, T four);

    <T> ImmutableSet<T> with(T one, T two, T three, T four);

    
Same as with(Object[]). 
/**
     * Same as {@link #with(Object[])}.
     */
    <T> ImmutableSet<T> of(T... items);

    <T> ImmutableSet<T> with(T... items);

    /**
     * Same as {@link #withAll(Iterable)}.
     */
    <T> ImmutableSet<T> ofAll(Iterable<? extends T> items);

    <T> ImmutableSet<T> withAll(Iterable<? extends T> items);

    
Since:10.0.
/**
     * @since 10.0.
     */
    default <T> ImmutableSet<T> fromStream(Stream<? extends T> stream)
    {
        return Sets.mutable.<T>fromStream(stream).toImmutable();
    }
}