Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * This file is part of NucleusFramework for Bukkit, licensed under the MIT License (MIT).
 *
 * Copyright (c) JCThePants (www.jcwhatever.com)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

import java.util.AbstractSet;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;

import java.util.Set;

public class Main {
    public static final Set UNMODIFIABLE_EMPTY_SET = new AbstractSet() {

        @Override
        public int size() {
            return 0;
        }

        @Override
        public Iterator iterator() {
            return new Iterator() {
                @Override
                public boolean hasNext() {
                    return false;
                }

                @Override
                public Object next() {
                    return null;
                }

                @Override
                public void remove() {

                }
            };
        }
    };

    /**
     * Wrap a {@link java.util.Collection} in an unmodifiable {@link java.util.Set}.
     * If the collection is already a {@link java.util.Set} then it is cast, otherwise
     * its elements are copied into a new {@link java.util.Set}.
     *
     * @param collection  The collection to wrap.
     *
     * @param <E>  The collection element type.
     */
    public static <E> Set<E> unmodifiableSet(Collection<E> collection) {
        return collection instanceof Set ? Collections.unmodifiableSet((Set<E>) collection)
                : Collections.unmodifiableSet(new HashSet<E>(collection));
    }

    /**
     * Get an empty unmodifiable {@link java.util.Set}.
     *
     * @param <E>  The collection element type.
     */
    public static <E> Set<E> unmodifiableSet() {

        @SuppressWarnings("unchecked")
        Set<E> set = (Set<E>) UNMODIFIABLE_EMPTY_SET;

        return set;
    }

    /**
     * Get an empty unmodifiable {@link java.util.Set}.
     *
     * <p>Convenience method to use when the empty signature method
     * cannot be used. Prevents errors and warnings.</p>
     *
     * @param clazz  The component type class.
     *
     * @param <E>  The collection element type.
     */
    public static <E> Set<E> unmodifiableSet(@SuppressWarnings("unused") Class<E> clazz) {

        @SuppressWarnings("unchecked")
        Set<E> set = (Set<E>) UNMODIFIABLE_EMPTY_SET;

        return set;
    }
}