Modifier.java

package me.august.lumen.common;

import java.util.ArrayList;
import java.util.List;

public enum Modifier {

    PACKAGE_PRIVATE(0x0000),
    PUBLIC(0x0001),
    PRIVATE(0x0002),
    PROTECTED(0x004),

    FINAL(0x0010),

    STATIC(0x0008),

    INTERFACE(0x0200),
    ABSTRACT(0x0400),

    VOLATILE(0x0040),
    SYNCHRONIZED(0x0020),
    NATIVE(0x0100);

    public final int value;

    Modifier(int value) {
        this.value = value;
    }

    public int getValue() {
        return value;
    }

    public static int compose(Modifier... mods) {
        int res = 0;
        for (Modifier m : mods) {
            res |= m.value;
        }
        return res;
    }

    public static Modifier[] fromAccess(int access) {
        List<Modifier> modifiers = new ArrayList<>();
        for (Modifier mod : values()) {
            if ((access & mod.getValue()) == mod.getValue()) {
                modifiers.add(mod);
            }
        }

        if ((access & PRIVATE.value) != 0
                || (access & PROTECTED.value) != 0
                || (access & PUBLIC.value) != 0)
            modifiers.remove(PACKAGE_PRIVATE);

        return modifiers.toArray(new Modifier[modifiers.size()]);
    }
}