146 throw new IllegalStateException();
147 final long oldElements = elements[lastReturnedIndex];
148 elements[lastReturnedIndex] &= ~lastReturned;
149 if (oldElements != elements[lastReturnedIndex]) {
150 size--;
151 }
152 lastReturned = 0;
153 }
154 }
155
156 /**
157 * Returns the number of elements in this set.
158 *
159 * @return the number of elements in this set
160 */
161 public int size() {
162 return size;
163 }
164
165 /**
166 * Returns <tt>true</tt> if this set contains no elements.
167 *
168 * @return <tt>true</tt> if this set contains no elements
169 */
170 public boolean isEmpty() {
171 return size == 0;
172 }
173
174 /**
175 * Returns <tt>true</tt> if this set contains the specified element.
176 *
177 * @param e element to be checked for containment in this collection
178 * @return <tt>true</tt> if this set contains the specified element
179 */
180 public boolean contains(Object e) {
181 if (e == null)
182 return false;
183 Class<?> eClass = e.getClass();
184 if (eClass != elementType && eClass.getSuperclass() != elementType)
185 return false;
186
187 int eOrdinal = ((Enum<?>)e).ordinal();
188 return (elements[eOrdinal >>> 6] & (1L << eOrdinal)) != 0;
189 }
190
191 // Modification Operations
192
193 /**
194 * Adds the specified element to this set if it is not already present.
195 *
196 * @param e element to be added to this set
197 * @return <tt>true</tt> if the set changed as a result of the call
198 *
199 * @throws NullPointerException if <tt>e</tt> is null
200 */
201 public boolean add(E e) {
202 typeCheck(e);
203
204 int eOrdinal = e.ordinal();
205 int eWordNum = eOrdinal >>> 6;
206
207 long oldElements = elements[eWordNum];
208 elements[eWordNum] |= (1L << eOrdinal);
209 boolean result = (elements[eWordNum] != oldElements);
210 if (result)
211 size++;
212 return result;
213 }
214
215 /**
216 * Removes the specified element from this set if it is present.
217 *
218 * @param e element to be removed from this set, if present
219 * @return <tt>true</tt> if the set contained the specified element
220 */
221 public boolean remove(Object e) {
222 if (e == null)
223 return false;
224 Class<?> eClass = e.getClass();
225 if (eClass != elementType && eClass.getSuperclass() != elementType)
226 return false;
227 int eOrdinal = ((Enum<?>)e).ordinal();
228 int eWordNum = eOrdinal >>> 6;
229
230 long oldElements = elements[eWordNum];
231 elements[eWordNum] &= ~(1L << eOrdinal);
232 boolean result = (elements[eWordNum] != oldElements);
233 if (result)
234 size--;
235 return result;
236 }
237
238 // Bulk Operations
239
240 /**
241 * Returns <tt>true</tt> if this set contains all of the elements
242 * in the specified collection.
243 *
244 * @param c collection to be checked for containment in this set
245 * @return <tt>true</tt> if this set contains all of the elements
246 * in the specified collection
247 * @throws NullPointerException if the specified collection is null
248 */
249 public boolean containsAll(Collection<?> c) {
250 if (!(c instanceof JumboEnumSet))
251 return super.containsAll(c);
252
253 JumboEnumSet<?> es = (JumboEnumSet<?>)c;
254 if (es.elementType != elementType)
255 return es.isEmpty();
256
257 for (int i = 0; i < elements.length; i++)
258 if ((es.elements[i] & ~elements[i]) != 0)
259 return false;
260 return true;
261 }
262
263 /**
264 * Adds all of the elements in the specified collection to this set.
265 *
266 * @param c collection whose elements are to be added to this set
267 * @return <tt>true</tt> if this set changed as a result of the call
268 * @throws NullPointerException if the specified collection or any of
269 * its elements are null
270 */
271 public boolean addAll(Collection<? extends E> c) {
272 if (!(c instanceof JumboEnumSet))
273 return super.addAll(c);
274
275 JumboEnumSet<?> es = (JumboEnumSet<?>)c;
276 if (es.elementType != elementType) {
277 if (es.isEmpty())
278 return false;
279 else
280 throw new ClassCastException(
281 es.elementType + " != " + elementType);
282 }
283
284 for (int i = 0; i < elements.length; i++)
285 elements[i] |= es.elements[i];
286 return recalculateSize();
287 }
288
289 /**
290 * Removes from this set all of its elements that are contained in
291 * the specified collection.
292 *
293 * @param c elements to be removed from this set
294 * @return <tt>true</tt> if this set changed as a result of the call
295 * @throws NullPointerException if the specified collection is null
296 */
297 public boolean removeAll(Collection<?> c) {
298 if (!(c instanceof JumboEnumSet))
299 return super.removeAll(c);
300
301 JumboEnumSet<?> es = (JumboEnumSet<?>)c;
302 if (es.elementType != elementType)
303 return false;
304
305 for (int i = 0; i < elements.length; i++)
306 elements[i] &= ~es.elements[i];
307 return recalculateSize();
308 }
309
310 /**
311 * Retains only the elements in this set that are contained in the
312 * specified collection.
313 *
314 * @param c elements to be retained in this set
315 * @return <tt>true</tt> if this set changed as a result of the call
316 * @throws NullPointerException if the specified collection is null
317 */
318 public boolean retainAll(Collection<?> c) {
319 if (!(c instanceof JumboEnumSet))
320 return super.retainAll(c);
321
322 JumboEnumSet<?> es = (JumboEnumSet<?>)c;
323 if (es.elementType != elementType) {
324 boolean changed = (size != 0);
325 clear();
326 return changed;
327 }
328
329 for (int i = 0; i < elements.length; i++)
330 elements[i] &= es.elements[i];
331 return recalculateSize();
332 }
333
334 /**
335 * Removes all of the elements from this set.
336 */
337 public void clear() {
338 Arrays.fill(elements, 0);
339 size = 0;
340 }
341
342 /**
343 * Compares the specified object with this set for equality. Returns
344 * <tt>true</tt> if the given object is also a set, the two sets have
345 * the same size, and every member of the given set is contained in
346 * this set.
347 *
348 * @param o object to be compared for equality with this set
349 * @return <tt>true</tt> if the specified object is equal to this set
350 */
351 public boolean equals(Object o) {
352 if (!(o instanceof JumboEnumSet))
353 return super.equals(o);
354
355 JumboEnumSet<?> es = (JumboEnumSet<?>)o;
356 if (es.elementType != elementType)
357 return size == 0 && es.size == 0;
358
359 return Arrays.equals(es.elements, elements);
360 }
361
362 /**
363 * Recalculates the size of the set. Returns true if it's changed.
364 */
365 private boolean recalculateSize() {
366 int oldSize = size;
367 size = 0;
368 for (long elt : elements)
369 size += Long.bitCount(elt);
|
146 throw new IllegalStateException();
147 final long oldElements = elements[lastReturnedIndex];
148 elements[lastReturnedIndex] &= ~lastReturned;
149 if (oldElements != elements[lastReturnedIndex]) {
150 size--;
151 }
152 lastReturned = 0;
153 }
154 }
155
156 /**
157 * Returns the number of elements in this set.
158 *
159 * @return the number of elements in this set
160 */
161 public int size() {
162 return size;
163 }
164
165 /**
166 * Returns {@code true} if this set contains no elements.
167 *
168 * @return {@code true} if this set contains no elements
169 */
170 public boolean isEmpty() {
171 return size == 0;
172 }
173
174 /**
175 * Returns {@code true} if this set contains the specified element.
176 *
177 * @param e element to be checked for containment in this collection
178 * @return {@code true} if this set contains the specified element
179 */
180 public boolean contains(Object e) {
181 if (e == null)
182 return false;
183 Class<?> eClass = e.getClass();
184 if (eClass != elementType && eClass.getSuperclass() != elementType)
185 return false;
186
187 int eOrdinal = ((Enum<?>)e).ordinal();
188 return (elements[eOrdinal >>> 6] & (1L << eOrdinal)) != 0;
189 }
190
191 // Modification Operations
192
193 /**
194 * Adds the specified element to this set if it is not already present.
195 *
196 * @param e element to be added to this set
197 * @return {@code true} if the set changed as a result of the call
198 *
199 * @throws NullPointerException if {@code e} is null
200 */
201 public boolean add(E e) {
202 typeCheck(e);
203
204 int eOrdinal = e.ordinal();
205 int eWordNum = eOrdinal >>> 6;
206
207 long oldElements = elements[eWordNum];
208 elements[eWordNum] |= (1L << eOrdinal);
209 boolean result = (elements[eWordNum] != oldElements);
210 if (result)
211 size++;
212 return result;
213 }
214
215 /**
216 * Removes the specified element from this set if it is present.
217 *
218 * @param e element to be removed from this set, if present
219 * @return {@code true} if the set contained the specified element
220 */
221 public boolean remove(Object e) {
222 if (e == null)
223 return false;
224 Class<?> eClass = e.getClass();
225 if (eClass != elementType && eClass.getSuperclass() != elementType)
226 return false;
227 int eOrdinal = ((Enum<?>)e).ordinal();
228 int eWordNum = eOrdinal >>> 6;
229
230 long oldElements = elements[eWordNum];
231 elements[eWordNum] &= ~(1L << eOrdinal);
232 boolean result = (elements[eWordNum] != oldElements);
233 if (result)
234 size--;
235 return result;
236 }
237
238 // Bulk Operations
239
240 /**
241 * Returns {@code true} if this set contains all of the elements
242 * in the specified collection.
243 *
244 * @param c collection to be checked for containment in this set
245 * @return {@code true} if this set contains all of the elements
246 * in the specified collection
247 * @throws NullPointerException if the specified collection is null
248 */
249 public boolean containsAll(Collection<?> c) {
250 if (!(c instanceof JumboEnumSet))
251 return super.containsAll(c);
252
253 JumboEnumSet<?> es = (JumboEnumSet<?>)c;
254 if (es.elementType != elementType)
255 return es.isEmpty();
256
257 for (int i = 0; i < elements.length; i++)
258 if ((es.elements[i] & ~elements[i]) != 0)
259 return false;
260 return true;
261 }
262
263 /**
264 * Adds all of the elements in the specified collection to this set.
265 *
266 * @param c collection whose elements are to be added to this set
267 * @return {@code true} if this set changed as a result of the call
268 * @throws NullPointerException if the specified collection or any of
269 * its elements are null
270 */
271 public boolean addAll(Collection<? extends E> c) {
272 if (!(c instanceof JumboEnumSet))
273 return super.addAll(c);
274
275 JumboEnumSet<?> es = (JumboEnumSet<?>)c;
276 if (es.elementType != elementType) {
277 if (es.isEmpty())
278 return false;
279 else
280 throw new ClassCastException(
281 es.elementType + " != " + elementType);
282 }
283
284 for (int i = 0; i < elements.length; i++)
285 elements[i] |= es.elements[i];
286 return recalculateSize();
287 }
288
289 /**
290 * Removes from this set all of its elements that are contained in
291 * the specified collection.
292 *
293 * @param c elements to be removed from this set
294 * @return {@code true} if this set changed as a result of the call
295 * @throws NullPointerException if the specified collection is null
296 */
297 public boolean removeAll(Collection<?> c) {
298 if (!(c instanceof JumboEnumSet))
299 return super.removeAll(c);
300
301 JumboEnumSet<?> es = (JumboEnumSet<?>)c;
302 if (es.elementType != elementType)
303 return false;
304
305 for (int i = 0; i < elements.length; i++)
306 elements[i] &= ~es.elements[i];
307 return recalculateSize();
308 }
309
310 /**
311 * Retains only the elements in this set that are contained in the
312 * specified collection.
313 *
314 * @param c elements to be retained in this set
315 * @return {@code true} if this set changed as a result of the call
316 * @throws NullPointerException if the specified collection is null
317 */
318 public boolean retainAll(Collection<?> c) {
319 if (!(c instanceof JumboEnumSet))
320 return super.retainAll(c);
321
322 JumboEnumSet<?> es = (JumboEnumSet<?>)c;
323 if (es.elementType != elementType) {
324 boolean changed = (size != 0);
325 clear();
326 return changed;
327 }
328
329 for (int i = 0; i < elements.length; i++)
330 elements[i] &= es.elements[i];
331 return recalculateSize();
332 }
333
334 /**
335 * Removes all of the elements from this set.
336 */
337 public void clear() {
338 Arrays.fill(elements, 0);
339 size = 0;
340 }
341
342 /**
343 * Compares the specified object with this set for equality. Returns
344 * {@code true} if the given object is also a set, the two sets have
345 * the same size, and every member of the given set is contained in
346 * this set.
347 *
348 * @param o object to be compared for equality with this set
349 * @return {@code true} if the specified object is equal to this set
350 */
351 public boolean equals(Object o) {
352 if (!(o instanceof JumboEnumSet))
353 return super.equals(o);
354
355 JumboEnumSet<?> es = (JumboEnumSet<?>)o;
356 if (es.elementType != elementType)
357 return size == 0 && es.size == 0;
358
359 return Arrays.equals(es.elements, elements);
360 }
361
362 /**
363 * Recalculates the size of the set. Returns true if it's changed.
364 */
365 private boolean recalculateSize() {
366 int oldSize = size;
367 size = 0;
368 for (long elt : elements)
369 size += Long.bitCount(elt);
|