17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.util;
27
28 /**
29 * Private implementation class for EnumSet, for "regular sized" enum types
30 * (i.e., those with 64 or fewer enum constants).
31 *
32 * @author Josh Bloch
33 * @since 1.5
34 * @serial exclude
35 */
36 class RegularEnumSet<E extends Enum<E>> extends EnumSet<E> {
37 private static final long serialVersionUID = 3411599620347842686L;
38 /**
39 * Bit vector representation of this set. The 2^k bit indicates the
40 * presence of universe[k] in this set.
41 */
42 private long elements = 0L;
43
44 RegularEnumSet(Class<E>elementType, Enum<?>[] universe) {
45 super(elementType, universe);
46 }
47
48 void addRange(E from, E to) {
49 elements = (-1L >>> (from.ordinal() - to.ordinal() - 1)) << from.ordinal();
50 }
51
52 void addAll() {
53 if (universe.length != 0)
54 elements = -1L >>> -universe.length;
55 }
56
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17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.util;
27
28 /**
29 * Private implementation class for EnumSet, for "regular sized" enum types
30 * (i.e., those with 64 or fewer enum constants).
31 *
32 * @author Josh Bloch
33 * @since 1.5
34 * @serial exclude
35 */
36 class RegularEnumSet<E extends Enum<E>> extends EnumSet<E> {
37 @java.io.Serial
38 private static final long serialVersionUID = 3411599620347842686L;
39 /**
40 * Bit vector representation of this set. The 2^k bit indicates the
41 * presence of universe[k] in this set.
42 */
43 private long elements = 0L;
44
45 RegularEnumSet(Class<E>elementType, Enum<?>[] universe) {
46 super(elementType, universe);
47 }
48
49 void addRange(E from, E to) {
50 elements = (-1L >>> (from.ordinal() - to.ordinal() - 1)) << from.ordinal();
51 }
52
53 void addAll() {
54 if (universe.length != 0)
55 elements = -1L >>> -universe.length;
56 }
57
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