Enums.java

/*
 * Copyright (c) 2012-2014, Parallel Universe Software Co. All rights reserved.
 * 
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *  
 *   or (per the licensee's choosing)
 *  
 * under the terms of the GNU Lesser General Public License version 3.0
 * as published by the Free Software Foundation.
 */
package co.paralleluniverse.common.util;

/**
 *
 * @author pron
 */
public final class Enums {
    public static <E extends Enum<E>> long setOf() {
        return 0L;
    }
    
    public static <E extends Enum<E>> long setOf(E e1) {
        return (1L << e1.ordinal());
    }

    public static <E extends Enum<E>> long setOf(E e1, E e2) {
        long set = 0;
        set |= (1L << e1.ordinal());
        set |= (1L << e2.ordinal());
        return set;
    }

    public static <E extends Enum<E>> long setOf(E e1, E e2, E e3) {
        long set = 0;
        set |= (1L << e1.ordinal());
        set |= (1L << e2.ordinal());
        set |= (1L << e3.ordinal());
        return set;
    }

    public static <E extends Enum<E>> long setOf(E e1, E e2, E e3, E e4) {
        long set = 0;
        set |= (1L << e1.ordinal());
        set |= (1L << e2.ordinal());
        set |= (1L << e3.ordinal());
        set |= (1L << e4.ordinal());
        return set;
    }

    public static <E extends Enum<E>> long setOf(E e1, E e2, E e3, E e4, E e5) {
        long set = 0;
        set |= (1L << e1.ordinal());
        set |= (1L << e2.ordinal());
        set |= (1L << e3.ordinal());
        set |= (1L << e4.ordinal());
        set |= (1L << e5.ordinal());
        return set;
    }

    public static <E extends Enum<E>> long setOf(E e1, E e2, E e3, E e4, E e5, E e6) {
        long set = 0;
        set |= (1L << e1.ordinal());
        set |= (1L << e2.ordinal());
        set |= (1L << e3.ordinal());
        set |= (1L << e4.ordinal());
        set |= (1L << e5.ordinal());
        set |= (1L << e6.ordinal());
        return set;
    }

    public static <E extends Enum<E>> long setOf(E e1, E e2, E e3, E e4, E e5, E e6, E e7) {
        long set = 0;
        set |= (1L << e1.ordinal());
        set |= (1L << e2.ordinal());
        set |= (1L << e3.ordinal());
        set |= (1L << e4.ordinal());
        set |= (1L << e5.ordinal());
        set |= (1L << e6.ordinal());
        set |= (1L << e7.ordinal());
        return set;
    }

    public static <E extends Enum<E>> long setOf(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8) {
        long set = 0;
        set |= (1L << e1.ordinal());
        set |= (1L << e2.ordinal());
        set |= (1L << e3.ordinal());
        set |= (1L << e4.ordinal());
        set |= (1L << e5.ordinal());
        set |= (1L << e6.ordinal());
        set |= (1L << e7.ordinal());
        set |= (1L << e8.ordinal());
        return set;
    }

    public static <E extends Enum<E>> long setOf(E... es) {
        long set = 0;
        for (E e : es)
            set |= (1L << e.ordinal());
        return set;
    }

    public static <E extends Enum<E>> long rangeBetween(E from, E to) {
        return (-1L >>>  (from.ordinal() - to.ordinal() - 1)) << from.ordinal();
    }
    
    public static boolean intersects(long set1, long set2) {
        return 0L != (set1 & set2);
    }
    
    public static <E extends Enum<E>> boolean isIn(E e, long set) {
        return intersects(setOf(e), set);
    }
    
    private Enums() {
    }
}