1 |
dl |
1.1 |
/* |
2 |
|
|
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
|
|
* Expert Group and released to the public domain, as explained at |
4 |
|
|
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
|
|
*/ |
6 |
|
|
|
7 |
|
|
package jsr166e.extra; |
8 |
jsr166 |
1.35 |
|
9 |
dl |
1.28 |
import jsr166e.StampedLock; |
10 |
dl |
1.1 |
import java.util.*; |
11 |
|
|
|
12 |
|
|
/** |
13 |
dl |
1.2 |
* A class with the same methods and array-based characteristics as |
14 |
|
|
* {@link java.util.Vector} but with reduced contention and improved |
15 |
dl |
1.1 |
* throughput when invocations of read-only methods by multiple |
16 |
jsr166 |
1.3 |
* threads are most common. |
17 |
dl |
1.1 |
* |
18 |
jsr166 |
1.31 |
* <p>The iterators returned by this class's {@link #iterator() |
19 |
dl |
1.1 |
* iterator} and {@link #listIterator(int) listIterator} methods are |
20 |
|
|
* best-effort in the presence of concurrent modifications, and do |
21 |
|
|
* <em>NOT</em> throw {@link ConcurrentModificationException}. An |
22 |
|
|
* iterator's {@code next()} method returns consecutive elements as |
23 |
jsr166 |
1.13 |
* they appear in the underlying array upon each access. Alternatively, |
24 |
dl |
1.5 |
* method {@link #snapshotIterator} may be used for deterministic |
25 |
|
|
* traversals, at the expense of making a copy, and unavailability of |
26 |
|
|
* method {@code Iterator.remove}. |
27 |
dl |
1.1 |
* |
28 |
|
|
* <p>Otherwise, this class supports all methods, under the same |
29 |
|
|
* documented specifications, as {@code Vector}. Consult {@link |
30 |
|
|
* java.util.Vector} for detailed specifications. Additionally, this |
31 |
|
|
* class provides methods {@link #addIfAbsent} and {@link |
32 |
|
|
* #addAllAbsent}. |
33 |
|
|
* |
34 |
|
|
* @author Doug Lea |
35 |
|
|
*/ |
36 |
jsr166 |
1.14 |
public class ReadMostlyVector<E> |
37 |
|
|
implements List<E>, RandomAccess, Cloneable, java.io.Serializable { |
38 |
dl |
1.1 |
private static final long serialVersionUID = 8673264195747942595L; |
39 |
|
|
|
40 |
|
|
/* |
41 |
|
|
* This class exists mainly as a vehicle to exercise various |
42 |
dl |
1.2 |
* constructions using SequenceLocks. Read-only methods |
43 |
|
|
* take one of a few forms: |
44 |
|
|
* |
45 |
|
|
* Short methods,including get(index), continually retry obtaining |
46 |
|
|
* a snapshot of array, count, and element, using sequence number |
47 |
|
|
* to validate. |
48 |
jsr166 |
1.3 |
* |
49 |
dl |
1.2 |
* Methods that are potentially O(n) (or worse) try once in |
50 |
|
|
* read-only mode, and then lock. When in read-only mode, they |
51 |
|
|
* validate only at the end of an array scan unless the element is |
52 |
|
|
* actually used (for example, as an argument of method equals). |
53 |
jsr166 |
1.21 |
* |
54 |
|
|
* We rely on some invariants that are always true, even for field |
55 |
|
|
* reads in read-only mode that have not yet been validated: |
56 |
|
|
* - array != null |
57 |
|
|
* - count >= 0 |
58 |
dl |
1.1 |
*/ |
59 |
|
|
|
60 |
|
|
/** |
61 |
|
|
* The maximum size of array to allocate. |
62 |
|
|
* See CopyOnWriteArrayList for explanation. |
63 |
|
|
*/ |
64 |
|
|
private static final int MAX_ARRAY_SIZE = Integer.MAX_VALUE - 8; |
65 |
|
|
|
66 |
jsr166 |
1.24 |
// fields are non-private to simplify nested class access |
67 |
dl |
1.28 |
Object[] array; |
68 |
|
|
final StampedLock lock; |
69 |
|
|
int count; |
70 |
dl |
1.1 |
final int capacityIncrement; |
71 |
|
|
|
72 |
|
|
/** |
73 |
|
|
* Creates an empty vector with the given initial capacity and |
74 |
|
|
* capacity increment. |
75 |
|
|
* |
76 |
|
|
* @param initialCapacity the initial capacity of the underlying array |
77 |
|
|
* @param capacityIncrement if non-zero, the number to |
78 |
|
|
* add when resizing to accommodate additional elements. |
79 |
|
|
* If zero, the array size is doubled when resized. |
80 |
|
|
* |
81 |
|
|
* @throws IllegalArgumentException if initial capacity is negative |
82 |
|
|
*/ |
83 |
|
|
public ReadMostlyVector(int initialCapacity, int capacityIncrement) { |
84 |
|
|
super(); |
85 |
|
|
if (initialCapacity < 0) |
86 |
|
|
throw new IllegalArgumentException("Illegal Capacity: "+ |
87 |
|
|
initialCapacity); |
88 |
|
|
this.array = new Object[initialCapacity]; |
89 |
|
|
this.capacityIncrement = capacityIncrement; |
90 |
dl |
1.28 |
this.lock = new StampedLock(); |
91 |
dl |
1.1 |
} |
92 |
|
|
|
93 |
|
|
/** |
94 |
|
|
* Creates an empty vector with the given initial capacity. |
95 |
|
|
* |
96 |
|
|
* @param initialCapacity the initial capacity of the underlying array |
97 |
|
|
* @throws IllegalArgumentException if initial capacity is negative |
98 |
|
|
*/ |
99 |
|
|
public ReadMostlyVector(int initialCapacity) { |
100 |
|
|
this(initialCapacity, 0); |
101 |
|
|
} |
102 |
|
|
|
103 |
|
|
/** |
104 |
dl |
1.28 |
* Creates an empty vector. |
105 |
dl |
1.1 |
*/ |
106 |
|
|
public ReadMostlyVector() { |
107 |
dl |
1.28 |
this.capacityIncrement = 0; |
108 |
|
|
this.lock = new StampedLock(); |
109 |
dl |
1.1 |
} |
110 |
|
|
|
111 |
|
|
/** |
112 |
|
|
* Creates a vector containing the elements of the specified |
113 |
|
|
* collection, in the order they are returned by the collection's |
114 |
|
|
* iterator. |
115 |
|
|
* |
116 |
|
|
* @param c the collection of initially held elements |
117 |
|
|
* @throws NullPointerException if the specified collection is null |
118 |
|
|
*/ |
119 |
|
|
public ReadMostlyVector(Collection<? extends E> c) { |
120 |
|
|
Object[] elements = c.toArray(); |
121 |
|
|
// c.toArray might (incorrectly) not return Object[] (see 6260652) |
122 |
|
|
if (elements.getClass() != Object[].class) |
123 |
|
|
elements = Arrays.copyOf(elements, elements.length, Object[].class); |
124 |
|
|
this.array = elements; |
125 |
|
|
this.count = elements.length; |
126 |
|
|
this.capacityIncrement = 0; |
127 |
dl |
1.28 |
this.lock = new StampedLock(); |
128 |
dl |
1.1 |
} |
129 |
|
|
|
130 |
|
|
// internal constructor for clone |
131 |
|
|
ReadMostlyVector(Object[] array, int count, int capacityIncrement) { |
132 |
|
|
this.array = array; |
133 |
|
|
this.count = count; |
134 |
|
|
this.capacityIncrement = capacityIncrement; |
135 |
dl |
1.28 |
this.lock = new StampedLock(); |
136 |
dl |
1.1 |
} |
137 |
|
|
|
138 |
dl |
1.28 |
static final int INITIAL_CAP = 16; |
139 |
|
|
|
140 |
dl |
1.1 |
// For explanation, see CopyOnWriteArrayList |
141 |
dl |
1.12 |
final Object[] grow(int minCapacity) { |
142 |
dl |
1.28 |
Object[] items; |
143 |
|
|
int newCapacity; |
144 |
|
|
if ((items = array) == null) |
145 |
|
|
newCapacity = INITIAL_CAP; |
146 |
|
|
else { |
147 |
|
|
int oldCapacity = array.length; |
148 |
|
|
newCapacity = oldCapacity + ((capacityIncrement > 0) ? |
149 |
dl |
1.1 |
capacityIncrement : oldCapacity); |
150 |
dl |
1.28 |
} |
151 |
dl |
1.1 |
if (newCapacity - minCapacity < 0) |
152 |
|
|
newCapacity = minCapacity; |
153 |
dl |
1.28 |
if (newCapacity - MAX_ARRAY_SIZE > 0) { |
154 |
|
|
if (minCapacity < 0) // overflow |
155 |
|
|
throw new OutOfMemoryError(); |
156 |
|
|
else if (minCapacity > MAX_ARRAY_SIZE) |
157 |
|
|
newCapacity = Integer.MAX_VALUE; |
158 |
|
|
else |
159 |
|
|
newCapacity = MAX_ARRAY_SIZE; |
160 |
|
|
} |
161 |
jsr166 |
1.29 |
return array = ((items == null) ? |
162 |
dl |
1.28 |
new Object[newCapacity] : |
163 |
|
|
Arrays.copyOf(items, newCapacity)); |
164 |
dl |
1.1 |
} |
165 |
|
|
|
166 |
|
|
/* |
167 |
|
|
* Internal versions of most base functionality, wrapped |
168 |
|
|
* in different ways from public methods from this class |
169 |
|
|
* as well as sublist and iterator classes. |
170 |
|
|
*/ |
171 |
|
|
|
172 |
dl |
1.28 |
static int findFirstIndex(Object[] items, Object x, int index, int fence) { |
173 |
|
|
int len; |
174 |
|
|
if (items != null && (len = items.length) > 0) { |
175 |
jsr166 |
1.30 |
int start = (index < 0) ? 0 : index; |
176 |
dl |
1.28 |
int bound = (fence < len) ? fence : len; |
177 |
|
|
for (int i = start; i < bound; ++i) { |
178 |
|
|
Object e = items[i]; |
179 |
|
|
if ((x == null) ? e == null : x.equals(e)) |
180 |
|
|
return i; |
181 |
|
|
} |
182 |
dl |
1.2 |
} |
183 |
|
|
return -1; |
184 |
|
|
} |
185 |
|
|
|
186 |
dl |
1.28 |
static int findLastIndex(Object[] items, Object x, int index, int origin) { |
187 |
|
|
int len; |
188 |
|
|
if (items != null && (len = items.length) > 0) { |
189 |
|
|
int last = (index < len) ? index : len - 1; |
190 |
|
|
int start = (origin < 0) ? 0 : origin; |
191 |
|
|
for (int i = last; i >= start; --i) { |
192 |
|
|
Object e = items[i]; |
193 |
|
|
if ((x == null) ? e == null : x.equals(e)) |
194 |
|
|
return i; |
195 |
|
|
} |
196 |
dl |
1.2 |
} |
197 |
|
|
return -1; |
198 |
|
|
} |
199 |
|
|
|
200 |
jsr166 |
1.14 |
final void rawAdd(E e) { |
201 |
dl |
1.2 |
int n = count; |
202 |
dl |
1.11 |
Object[] items = array; |
203 |
dl |
1.28 |
if (items == null || n >= items.length) |
204 |
dl |
1.12 |
items = grow(n + 1); |
205 |
|
|
items[n] = e; |
206 |
dl |
1.2 |
count = n + 1; |
207 |
dl |
1.1 |
} |
208 |
|
|
|
209 |
jsr166 |
1.14 |
final void rawAddAt(int index, E e) { |
210 |
dl |
1.2 |
int n = count; |
211 |
dl |
1.12 |
Object[] items = array; |
212 |
dl |
1.2 |
if (index > n) |
213 |
dl |
1.1 |
throw new ArrayIndexOutOfBoundsException(index); |
214 |
dl |
1.28 |
if (items == null || n >= items.length) |
215 |
dl |
1.12 |
items = grow(n + 1); |
216 |
dl |
1.2 |
if (index < n) |
217 |
dl |
1.11 |
System.arraycopy(items, index, items, index + 1, n - index); |
218 |
|
|
items[index] = e; |
219 |
dl |
1.2 |
count = n + 1; |
220 |
dl |
1.1 |
} |
221 |
|
|
|
222 |
dl |
1.4 |
final boolean rawAddAllAt(int index, Object[] elements) { |
223 |
dl |
1.2 |
int n = count; |
224 |
dl |
1.12 |
Object[] items = array; |
225 |
dl |
1.2 |
if (index < 0 || index > n) |
226 |
dl |
1.1 |
throw new ArrayIndexOutOfBoundsException(index); |
227 |
|
|
int len = elements.length; |
228 |
|
|
if (len == 0) |
229 |
|
|
return false; |
230 |
dl |
1.2 |
int newCount = n + len; |
231 |
dl |
1.28 |
if (items == null || newCount >= items.length) |
232 |
dl |
1.12 |
items = grow(newCount); |
233 |
dl |
1.11 |
int mv = n - index; |
234 |
dl |
1.1 |
if (mv > 0) |
235 |
dl |
1.11 |
System.arraycopy(items, index, items, index + len, mv); |
236 |
|
|
System.arraycopy(elements, 0, items, index, len); |
237 |
dl |
1.1 |
count = newCount; |
238 |
|
|
return true; |
239 |
|
|
} |
240 |
|
|
|
241 |
dl |
1.4 |
final boolean rawRemoveAt(int index) { |
242 |
dl |
1.12 |
int n = count - 1; |
243 |
dl |
1.11 |
Object[] items = array; |
244 |
dl |
1.28 |
if (items == null || index < 0 || index > n) |
245 |
dl |
1.1 |
return false; |
246 |
dl |
1.2 |
int mv = n - index; |
247 |
dl |
1.1 |
if (mv > 0) |
248 |
dl |
1.11 |
System.arraycopy(items, index + 1, items, index, mv); |
249 |
|
|
items[n] = null; |
250 |
dl |
1.2 |
count = n; |
251 |
dl |
1.1 |
return true; |
252 |
|
|
} |
253 |
|
|
|
254 |
|
|
/** |
255 |
|
|
* Internal version of removeAll for lists and sublists. In this |
256 |
dl |
1.2 |
* and other similar methods below, the bound argument is, if |
257 |
|
|
* non-negative, the purported upper bound of a list/sublist, or |
258 |
|
|
* is left negative if the bound should be determined via count |
259 |
|
|
* field under lock. |
260 |
dl |
1.1 |
*/ |
261 |
dl |
1.28 |
final boolean lockedRemoveAll(Collection<?> c, int origin, int bound) { |
262 |
dl |
1.1 |
boolean removed = false; |
263 |
dl |
1.28 |
final StampedLock lock = this.lock; |
264 |
|
|
long stamp = lock.writeLock(); |
265 |
dl |
1.1 |
try { |
266 |
dl |
1.2 |
int n = count; |
267 |
|
|
int fence = bound < 0 || bound > n ? n : bound; |
268 |
dl |
1.1 |
if (origin >= 0 && origin < fence) { |
269 |
|
|
for (Object x : c) { |
270 |
dl |
1.28 |
while (rawRemoveAt(findFirstIndex(array, x, origin, fence))) |
271 |
dl |
1.1 |
removed = true; |
272 |
|
|
} |
273 |
|
|
} |
274 |
|
|
} finally { |
275 |
dl |
1.28 |
lock.unlockWrite(stamp); |
276 |
dl |
1.1 |
} |
277 |
|
|
return removed; |
278 |
|
|
} |
279 |
|
|
|
280 |
dl |
1.28 |
final boolean lockedRetainAll(Collection<?> c, int origin, int bound) { |
281 |
|
|
final StampedLock lock = this.lock; |
282 |
dl |
1.1 |
boolean removed = false; |
283 |
|
|
if (c != this) { |
284 |
dl |
1.28 |
long stamp = lock.writeLock(); |
285 |
dl |
1.1 |
try { |
286 |
dl |
1.28 |
Object[] items; |
287 |
|
|
int i, n; |
288 |
|
|
if ((items = array) != null && (n = count) > 0 && |
289 |
|
|
n < items.length && (i = origin) >= 0) { |
290 |
|
|
int fence = bound < 0 || bound > n ? n : bound; |
291 |
|
|
while (i < fence) { |
292 |
|
|
if (c.contains(items[i])) |
293 |
|
|
++i; |
294 |
|
|
else { |
295 |
|
|
--fence; |
296 |
|
|
int mv = --n - i; |
297 |
|
|
if (mv > 0) |
298 |
|
|
System.arraycopy(items, i + 1, items, i, mv); |
299 |
|
|
} |
300 |
|
|
} |
301 |
|
|
if (count != n) { |
302 |
|
|
count = n; |
303 |
|
|
removed = true; |
304 |
dl |
1.1 |
} |
305 |
|
|
} |
306 |
|
|
} finally { |
307 |
dl |
1.28 |
lock.unlockWrite(stamp); |
308 |
dl |
1.1 |
} |
309 |
|
|
} |
310 |
|
|
return removed; |
311 |
|
|
} |
312 |
|
|
|
313 |
dl |
1.2 |
final void internalClear(int origin, int bound) { |
314 |
dl |
1.28 |
Object[] items; |
315 |
|
|
int n, len; |
316 |
|
|
if ((items = array) != null && (len = items.length) > 0) { |
317 |
|
|
if (origin < 0) |
318 |
|
|
origin = 0; |
319 |
|
|
if ((n = count) > len) |
320 |
|
|
n = len; |
321 |
|
|
int fence = bound < 0 || bound > n ? n : bound; |
322 |
dl |
1.1 |
int removed = fence - origin; |
323 |
dl |
1.2 |
int newCount = n - removed; |
324 |
|
|
int mv = n - (origin + removed); |
325 |
dl |
1.1 |
if (mv > 0) |
326 |
dl |
1.11 |
System.arraycopy(items, origin + removed, items, origin, mv); |
327 |
dl |
1.2 |
for (int i = n; i < newCount; ++i) |
328 |
dl |
1.11 |
items[i] = null; |
329 |
dl |
1.1 |
count = newCount; |
330 |
|
|
} |
331 |
|
|
} |
332 |
|
|
|
333 |
dl |
1.2 |
final boolean internalContainsAll(Collection<?> c, int origin, int bound) { |
334 |
dl |
1.28 |
Object[] items; |
335 |
|
|
int n, len; |
336 |
|
|
if ((items = array) != null && (len = items.length) > 0) { |
337 |
|
|
if (origin < 0) |
338 |
|
|
origin = 0; |
339 |
|
|
if ((n = count) > len) |
340 |
|
|
n = len; |
341 |
|
|
int fence = bound < 0 || bound > n ? n : bound; |
342 |
|
|
for (Object e : c) { |
343 |
|
|
if (findFirstIndex(items, e, origin, fence) < 0) |
344 |
|
|
return false; |
345 |
dl |
1.1 |
} |
346 |
|
|
} |
347 |
dl |
1.28 |
else if (!c.isEmpty()) |
348 |
|
|
return false; |
349 |
|
|
return true; |
350 |
dl |
1.1 |
} |
351 |
|
|
|
352 |
dl |
1.2 |
final boolean internalEquals(List<?> list, int origin, int bound) { |
353 |
dl |
1.28 |
Object[] items; |
354 |
|
|
int n, len; |
355 |
|
|
if ((items = array) != null && (len = items.length) > 0) { |
356 |
|
|
if (origin < 0) |
357 |
|
|
origin = 0; |
358 |
|
|
if ((n = count) > len) |
359 |
|
|
n = len; |
360 |
|
|
int fence = bound < 0 || bound > n ? n : bound; |
361 |
|
|
Iterator<?> it = list.iterator(); |
362 |
|
|
for (int i = origin; i < fence; ++i) { |
363 |
|
|
if (!it.hasNext()) |
364 |
|
|
return false; |
365 |
|
|
Object y = it.next(); |
366 |
|
|
Object x = items[i]; |
367 |
|
|
if (x != y && (x == null || !x.equals(y))) |
368 |
|
|
return false; |
369 |
dl |
1.1 |
} |
370 |
dl |
1.28 |
if (it.hasNext()) |
371 |
|
|
return false; |
372 |
dl |
1.1 |
} |
373 |
dl |
1.28 |
else if (!list.isEmpty()) |
374 |
|
|
return false; |
375 |
|
|
return true; |
376 |
dl |
1.1 |
} |
377 |
|
|
|
378 |
dl |
1.2 |
final int internalHashCode(int origin, int bound) { |
379 |
dl |
1.28 |
int hash = 1; |
380 |
|
|
Object[] items; |
381 |
|
|
int n, len; |
382 |
|
|
if ((items = array) != null && (len = items.length) > 0) { |
383 |
|
|
if (origin < 0) |
384 |
|
|
origin = 0; |
385 |
|
|
if ((n = count) > len) |
386 |
|
|
n = len; |
387 |
|
|
int fence = bound < 0 || bound > n ? n : bound; |
388 |
|
|
for (int i = origin; i < fence; ++i) { |
389 |
|
|
Object e = items[i]; |
390 |
|
|
hash = 31*hash + (e == null ? 0 : e.hashCode()); |
391 |
dl |
1.1 |
} |
392 |
|
|
} |
393 |
|
|
return hash; |
394 |
|
|
} |
395 |
|
|
|
396 |
dl |
1.2 |
final String internalToString(int origin, int bound) { |
397 |
dl |
1.28 |
Object[] items; |
398 |
|
|
int n, len; |
399 |
|
|
if ((items = array) != null && (len = items.length) > 0) { |
400 |
|
|
if ((n = count) > len) |
401 |
|
|
n = len; |
402 |
|
|
int fence = bound < 0 || bound > n ? n : bound; |
403 |
|
|
int i = (origin < 0) ? 0 : origin; |
404 |
|
|
if (i != fence) { |
405 |
|
|
StringBuilder sb = new StringBuilder(); |
406 |
|
|
sb.append('['); |
407 |
|
|
for (;;) { |
408 |
|
|
Object e = items[i]; |
409 |
jsr166 |
1.30 |
sb.append((e == this) ? "(this Collection)" : e.toString()); |
410 |
dl |
1.28 |
if (++i < fence) |
411 |
|
|
sb.append(',').append(' '); |
412 |
|
|
else |
413 |
|
|
return sb.append(']').toString(); |
414 |
dl |
1.1 |
} |
415 |
|
|
} |
416 |
|
|
} |
417 |
dl |
1.28 |
return "[]"; |
418 |
dl |
1.1 |
} |
419 |
|
|
|
420 |
dl |
1.2 |
final Object[] internalToArray(int origin, int bound) { |
421 |
dl |
1.28 |
Object[] items; |
422 |
|
|
int n, len; |
423 |
|
|
if ((items = array) != null && (len = items.length) > 0) { |
424 |
|
|
if (origin < 0) |
425 |
|
|
origin = 0; |
426 |
|
|
if ((n = count) > len) |
427 |
|
|
n = len; |
428 |
|
|
int fence = bound < 0 || bound > n ? n : bound; |
429 |
|
|
int i = (origin < 0) ? 0 : origin; |
430 |
jsr166 |
1.29 |
if (i != fence) |
431 |
dl |
1.28 |
return Arrays.copyOfRange(items, i, fence, Object[].class); |
432 |
dl |
1.1 |
} |
433 |
dl |
1.28 |
return new Object[0]; |
434 |
dl |
1.1 |
} |
435 |
|
|
|
436 |
jsr166 |
1.14 |
@SuppressWarnings("unchecked") |
437 |
dl |
1.2 |
final <T> T[] internalToArray(T[] a, int origin, int bound) { |
438 |
|
|
int alen = a.length; |
439 |
dl |
1.28 |
Object[] items; |
440 |
|
|
int n, len; |
441 |
|
|
if ((items = array) != null && (len = items.length) > 0) { |
442 |
|
|
if (origin < 0) |
443 |
|
|
origin = 0; |
444 |
|
|
if ((n = count) > len) |
445 |
|
|
n = len; |
446 |
|
|
int fence = bound < 0 || bound > n ? n : bound; |
447 |
|
|
int i = (origin < 0) ? 0 : origin; |
448 |
|
|
int rlen = fence - origin; |
449 |
|
|
if (rlen > 0) { |
450 |
|
|
if (alen >= rlen) { |
451 |
|
|
System.arraycopy(items, 0, a, origin, rlen); |
452 |
dl |
1.2 |
if (alen > rlen) |
453 |
|
|
a[rlen] = null; |
454 |
dl |
1.28 |
return a; |
455 |
dl |
1.1 |
} |
456 |
dl |
1.28 |
return (T[]) Arrays.copyOfRange(items, i, fence, a.getClass()); |
457 |
dl |
1.1 |
} |
458 |
|
|
} |
459 |
dl |
1.28 |
if (alen > 0) |
460 |
|
|
a[0] = null; |
461 |
|
|
return a; |
462 |
dl |
1.1 |
} |
463 |
|
|
|
464 |
|
|
// public List methods |
465 |
|
|
|
466 |
|
|
public boolean add(E e) { |
467 |
dl |
1.28 |
final StampedLock lock = this.lock; |
468 |
|
|
long stamp = lock.writeLock(); |
469 |
dl |
1.1 |
try { |
470 |
dl |
1.4 |
rawAdd(e); |
471 |
dl |
1.1 |
} finally { |
472 |
dl |
1.28 |
lock.unlockWrite(stamp); |
473 |
dl |
1.1 |
} |
474 |
|
|
return true; |
475 |
|
|
} |
476 |
|
|
|
477 |
|
|
public void add(int index, E element) { |
478 |
dl |
1.28 |
final StampedLock lock = this.lock; |
479 |
|
|
long stamp = lock.writeLock(); |
480 |
dl |
1.1 |
try { |
481 |
dl |
1.4 |
rawAddAt(index, element); |
482 |
dl |
1.1 |
} finally { |
483 |
dl |
1.28 |
lock.unlockWrite(stamp); |
484 |
dl |
1.1 |
} |
485 |
|
|
} |
486 |
|
|
|
487 |
|
|
public boolean addAll(Collection<? extends E> c) { |
488 |
|
|
Object[] elements = c.toArray(); |
489 |
|
|
int len = elements.length; |
490 |
|
|
if (len == 0) |
491 |
|
|
return false; |
492 |
dl |
1.28 |
final StampedLock lock = this.lock; |
493 |
|
|
long stamp = lock.writeLock(); |
494 |
dl |
1.1 |
try { |
495 |
dl |
1.12 |
Object[] items = array; |
496 |
|
|
int n = count; |
497 |
|
|
int newCount = n + len; |
498 |
dl |
1.28 |
if (items == null || newCount >= items.length) |
499 |
dl |
1.12 |
items = grow(newCount); |
500 |
|
|
System.arraycopy(elements, 0, items, n, len); |
501 |
dl |
1.1 |
count = newCount; |
502 |
|
|
} finally { |
503 |
dl |
1.28 |
lock.unlockWrite(stamp); |
504 |
dl |
1.1 |
} |
505 |
|
|
return true; |
506 |
|
|
} |
507 |
|
|
|
508 |
|
|
public boolean addAll(int index, Collection<? extends E> c) { |
509 |
dl |
1.28 |
Object[] elements = c.toArray(); |
510 |
dl |
1.1 |
boolean ret; |
511 |
dl |
1.28 |
final StampedLock lock = this.lock; |
512 |
|
|
long stamp = lock.writeLock(); |
513 |
dl |
1.1 |
try { |
514 |
dl |
1.4 |
ret = rawAddAllAt(index, elements); |
515 |
dl |
1.1 |
} finally { |
516 |
dl |
1.28 |
lock.unlockWrite(stamp); |
517 |
dl |
1.1 |
} |
518 |
|
|
return ret; |
519 |
|
|
} |
520 |
|
|
|
521 |
|
|
public void clear() { |
522 |
dl |
1.28 |
final StampedLock lock = this.lock; |
523 |
|
|
long stamp = lock.writeLock(); |
524 |
dl |
1.1 |
try { |
525 |
dl |
1.12 |
int n = count; |
526 |
dl |
1.11 |
Object[] items = array; |
527 |
dl |
1.28 |
if (items != null) { |
528 |
|
|
for (int i = 0; i < n; i++) |
529 |
|
|
items[i] = null; |
530 |
|
|
} |
531 |
dl |
1.1 |
count = 0; |
532 |
|
|
} finally { |
533 |
dl |
1.28 |
lock.unlockWrite(stamp); |
534 |
dl |
1.1 |
} |
535 |
|
|
} |
536 |
|
|
|
537 |
|
|
public boolean contains(Object o) { |
538 |
|
|
return indexOf(o, 0) >= 0; |
539 |
|
|
} |
540 |
|
|
|
541 |
|
|
public boolean containsAll(Collection<?> c) { |
542 |
dl |
1.28 |
boolean ret; |
543 |
|
|
final StampedLock lock = this.lock; |
544 |
|
|
long stamp = lock.readLock(); |
545 |
|
|
try { |
546 |
|
|
ret = internalContainsAll(c, 0, -1); |
547 |
|
|
} finally { |
548 |
|
|
lock.unlockRead(stamp); |
549 |
|
|
} |
550 |
|
|
return ret; |
551 |
dl |
1.1 |
} |
552 |
|
|
|
553 |
|
|
public boolean equals(Object o) { |
554 |
|
|
if (o == this) |
555 |
|
|
return true; |
556 |
|
|
if (!(o instanceof List)) |
557 |
|
|
return false; |
558 |
dl |
1.28 |
final StampedLock lock = this.lock; |
559 |
|
|
long stamp = lock.readLock(); |
560 |
|
|
try { |
561 |
|
|
return internalEquals((List<?>)o, 0, -1); |
562 |
|
|
} finally { |
563 |
|
|
lock.unlockRead(stamp); |
564 |
|
|
} |
565 |
dl |
1.1 |
} |
566 |
|
|
|
567 |
|
|
public E get(int index) { |
568 |
dl |
1.28 |
final StampedLock lock = this.lock; |
569 |
|
|
long stamp = lock.tryOptimisticRead(); |
570 |
|
|
Object[] items; |
571 |
jsr166 |
1.29 |
if (index >= 0 && (items = array) != null && |
572 |
dl |
1.28 |
index < count && index < items.length) { |
573 |
|
|
@SuppressWarnings("unchecked") E e = (E)items[index]; |
574 |
|
|
if (lock.validate(stamp)) |
575 |
jsr166 |
1.18 |
return e; |
576 |
dl |
1.1 |
} |
577 |
dl |
1.28 |
return lockedGet(index); |
578 |
dl |
1.1 |
} |
579 |
|
|
|
580 |
dl |
1.28 |
@SuppressWarnings("unchecked") private E lockedGet(int index) { |
581 |
|
|
boolean oobe = false; |
582 |
|
|
E e = null; |
583 |
|
|
final StampedLock lock = this.lock; |
584 |
|
|
long stamp = lock.readLock(); |
585 |
|
|
try { |
586 |
|
|
Object[] items; |
587 |
jsr166 |
1.29 |
if ((items = array) != null && index < items.length && |
588 |
dl |
1.28 |
index < count && index >= 0) |
589 |
|
|
e = (E)items[index]; |
590 |
|
|
else |
591 |
|
|
oobe = true; |
592 |
|
|
} finally { |
593 |
|
|
lock.unlockRead(stamp); |
594 |
|
|
} |
595 |
|
|
if (oobe) |
596 |
|
|
throw new ArrayIndexOutOfBoundsException(index); |
597 |
jsr166 |
1.34 |
return e; |
598 |
dl |
1.28 |
} |
599 |
jsr166 |
1.29 |
|
600 |
dl |
1.1 |
public int hashCode() { |
601 |
dl |
1.28 |
int h; |
602 |
|
|
final StampedLock lock = this.lock; |
603 |
|
|
long s = lock.readLock(); |
604 |
|
|
try { |
605 |
|
|
h = internalHashCode(0, -1); |
606 |
|
|
} finally { |
607 |
|
|
lock.unlockRead(s); |
608 |
|
|
} |
609 |
|
|
return h; |
610 |
dl |
1.1 |
} |
611 |
jsr166 |
1.29 |
|
612 |
dl |
1.1 |
public int indexOf(Object o) { |
613 |
dl |
1.28 |
int idx; |
614 |
|
|
final StampedLock lock = this.lock; |
615 |
|
|
long stamp = lock.readLock(); |
616 |
|
|
try { |
617 |
|
|
idx = findFirstIndex(array, o, 0, count); |
618 |
|
|
} finally { |
619 |
|
|
lock.unlockRead(stamp); |
620 |
|
|
} |
621 |
|
|
return idx; |
622 |
dl |
1.1 |
} |
623 |
|
|
|
624 |
|
|
public boolean isEmpty() { |
625 |
dl |
1.28 |
final StampedLock lock = this.lock; |
626 |
|
|
long stamp = lock.tryOptimisticRead(); |
627 |
|
|
return count == 0; // no need for validation |
628 |
dl |
1.1 |
} |
629 |
|
|
|
630 |
|
|
public Iterator<E> iterator() { |
631 |
jsr166 |
1.10 |
return new Itr<E>(this, 0); |
632 |
dl |
1.1 |
} |
633 |
|
|
|
634 |
|
|
public int lastIndexOf(Object o) { |
635 |
dl |
1.28 |
int idx; |
636 |
|
|
final StampedLock lock = this.lock; |
637 |
|
|
long stamp = lock.readLock(); |
638 |
|
|
try { |
639 |
|
|
idx = findLastIndex(array, o, count - 1, 0); |
640 |
|
|
} finally { |
641 |
|
|
lock.unlockRead(stamp); |
642 |
dl |
1.1 |
} |
643 |
dl |
1.28 |
return idx; |
644 |
dl |
1.1 |
} |
645 |
|
|
|
646 |
|
|
public ListIterator<E> listIterator() { |
647 |
jsr166 |
1.10 |
return new Itr<E>(this, 0); |
648 |
dl |
1.1 |
} |
649 |
|
|
|
650 |
|
|
public ListIterator<E> listIterator(int index) { |
651 |
jsr166 |
1.10 |
return new Itr<E>(this, index); |
652 |
dl |
1.1 |
} |
653 |
|
|
|
654 |
dl |
1.28 |
@SuppressWarnings("unchecked") public E remove(int index) { |
655 |
|
|
E oldValue = null; |
656 |
|
|
boolean oobe = false; |
657 |
|
|
final StampedLock lock = this.lock; |
658 |
|
|
long stamp = lock.writeLock(); |
659 |
dl |
1.1 |
try { |
660 |
|
|
if (index < 0 || index >= count) |
661 |
dl |
1.28 |
oobe = true; |
662 |
|
|
else { |
663 |
|
|
oldValue = (E) array[index]; |
664 |
|
|
rawRemoveAt(index); |
665 |
|
|
} |
666 |
dl |
1.1 |
} finally { |
667 |
dl |
1.28 |
lock.unlockWrite(stamp); |
668 |
dl |
1.1 |
} |
669 |
dl |
1.28 |
if (oobe) |
670 |
|
|
throw new ArrayIndexOutOfBoundsException(index); |
671 |
|
|
return oldValue; |
672 |
dl |
1.1 |
} |
673 |
|
|
|
674 |
|
|
public boolean remove(Object o) { |
675 |
dl |
1.28 |
final StampedLock lock = this.lock; |
676 |
|
|
long stamp = lock.writeLock(); |
677 |
dl |
1.1 |
try { |
678 |
dl |
1.28 |
return rawRemoveAt(findFirstIndex(array, o, 0, count)); |
679 |
dl |
1.1 |
} finally { |
680 |
dl |
1.28 |
lock.unlockWrite(stamp); |
681 |
dl |
1.1 |
} |
682 |
|
|
} |
683 |
|
|
|
684 |
|
|
public boolean removeAll(Collection<?> c) { |
685 |
dl |
1.28 |
return lockedRemoveAll(c, 0, -1); |
686 |
dl |
1.1 |
} |
687 |
|
|
|
688 |
|
|
public boolean retainAll(Collection<?> c) { |
689 |
dl |
1.28 |
return lockedRetainAll(c, 0, -1); |
690 |
dl |
1.1 |
} |
691 |
|
|
|
692 |
dl |
1.28 |
@SuppressWarnings("unchecked") public E set(int index, E element) { |
693 |
|
|
E oldValue = null; |
694 |
|
|
boolean oobe = false; |
695 |
|
|
final StampedLock lock = this.lock; |
696 |
|
|
long stamp = lock.writeLock(); |
697 |
dl |
1.1 |
try { |
698 |
dl |
1.11 |
Object[] items = array; |
699 |
dl |
1.28 |
if (items == null || index < 0 || index >= count) |
700 |
|
|
oobe = true; |
701 |
|
|
else { |
702 |
|
|
oldValue = (E) items[index]; |
703 |
|
|
items[index] = element; |
704 |
|
|
} |
705 |
dl |
1.1 |
} finally { |
706 |
dl |
1.28 |
lock.unlockWrite(stamp); |
707 |
dl |
1.1 |
} |
708 |
dl |
1.28 |
if (oobe) |
709 |
|
|
throw new ArrayIndexOutOfBoundsException(index); |
710 |
|
|
return oldValue; |
711 |
dl |
1.1 |
} |
712 |
|
|
|
713 |
|
|
public int size() { |
714 |
dl |
1.28 |
final StampedLock lock = this.lock; |
715 |
|
|
long stamp = lock.tryOptimisticRead(); |
716 |
|
|
return count; // no need for validation |
717 |
|
|
} |
718 |
|
|
|
719 |
|
|
private int lockedSize() { |
720 |
|
|
int n; |
721 |
|
|
final StampedLock lock = this.lock; |
722 |
|
|
long stamp = lock.readLock(); |
723 |
|
|
try { |
724 |
|
|
n = count; |
725 |
|
|
} finally { |
726 |
|
|
lock.unlockRead(stamp); |
727 |
|
|
} |
728 |
|
|
return n; |
729 |
dl |
1.1 |
} |
730 |
|
|
|
731 |
|
|
public List<E> subList(int fromIndex, int toIndex) { |
732 |
|
|
int ssize = toIndex - fromIndex; |
733 |
dl |
1.28 |
if (ssize >= 0 && fromIndex >= 0) { |
734 |
|
|
ReadMostlyVectorSublist<E> ret = null; |
735 |
|
|
final StampedLock lock = this.lock; |
736 |
|
|
long stamp = lock.readLock(); |
737 |
|
|
try { |
738 |
|
|
if (toIndex <= count) |
739 |
|
|
ret = new ReadMostlyVectorSublist<E>(this, fromIndex, ssize); |
740 |
|
|
} finally { |
741 |
|
|
lock.unlockRead(stamp); |
742 |
|
|
} |
743 |
|
|
if (ret != null) |
744 |
|
|
return ret; |
745 |
|
|
} |
746 |
jsr166 |
1.29 |
|
747 |
dl |
1.28 |
throw new ArrayIndexOutOfBoundsException(fromIndex < 0 ? fromIndex : toIndex); |
748 |
dl |
1.1 |
} |
749 |
|
|
|
750 |
|
|
public Object[] toArray() { |
751 |
dl |
1.28 |
final StampedLock lock = this.lock; |
752 |
|
|
long stamp = lock.readLock(); |
753 |
|
|
try { |
754 |
|
|
return internalToArray(0, -1); |
755 |
|
|
} finally { |
756 |
|
|
lock.unlockRead(stamp); |
757 |
|
|
} |
758 |
dl |
1.1 |
} |
759 |
|
|
|
760 |
|
|
public <T> T[] toArray(T[] a) { |
761 |
dl |
1.28 |
final StampedLock lock = this.lock; |
762 |
|
|
long stamp = lock.readLock(); |
763 |
|
|
try { |
764 |
|
|
return internalToArray(a, 0, -1); |
765 |
|
|
} finally { |
766 |
|
|
lock.unlockRead(stamp); |
767 |
|
|
} |
768 |
dl |
1.1 |
} |
769 |
|
|
|
770 |
|
|
public String toString() { |
771 |
dl |
1.28 |
final StampedLock lock = this.lock; |
772 |
|
|
long stamp = lock.readLock(); |
773 |
|
|
try { |
774 |
|
|
return internalToString(0, -1); |
775 |
|
|
} finally { |
776 |
|
|
lock.unlockRead(stamp); |
777 |
|
|
} |
778 |
dl |
1.1 |
} |
779 |
|
|
|
780 |
|
|
// ReadMostlyVector-only methods |
781 |
|
|
|
782 |
|
|
/** |
783 |
jsr166 |
1.25 |
* Appends the element, if not present. |
784 |
dl |
1.1 |
* |
785 |
|
|
* @param e element to be added to this list, if absent |
786 |
jsr166 |
1.9 |
* @return {@code true} if the element was added |
787 |
dl |
1.1 |
*/ |
788 |
|
|
public boolean addIfAbsent(E e) { |
789 |
dl |
1.28 |
boolean ret; |
790 |
|
|
final StampedLock lock = this.lock; |
791 |
|
|
long stamp = lock.writeLock(); |
792 |
dl |
1.1 |
try { |
793 |
dl |
1.28 |
if (findFirstIndex(array, e, 0, count) < 0) { |
794 |
dl |
1.4 |
rawAdd(e); |
795 |
dl |
1.28 |
ret = true; |
796 |
dl |
1.1 |
} |
797 |
|
|
else |
798 |
dl |
1.28 |
ret = false; |
799 |
dl |
1.1 |
} finally { |
800 |
dl |
1.28 |
lock.unlockWrite(stamp); |
801 |
dl |
1.1 |
} |
802 |
dl |
1.28 |
return ret; |
803 |
dl |
1.1 |
} |
804 |
|
|
|
805 |
|
|
/** |
806 |
|
|
* Appends all of the elements in the specified collection that |
807 |
|
|
* are not already contained in this list, to the end of |
808 |
|
|
* this list, in the order that they are returned by the |
809 |
|
|
* specified collection's iterator. |
810 |
|
|
* |
811 |
|
|
* @param c collection containing elements to be added to this list |
812 |
|
|
* @return the number of elements added |
813 |
|
|
* @throws NullPointerException if the specified collection is null |
814 |
|
|
* @see #addIfAbsent(Object) |
815 |
|
|
*/ |
816 |
|
|
public int addAllAbsent(Collection<? extends E> c) { |
817 |
|
|
int added = 0; |
818 |
|
|
Object[] cs = c.toArray(); |
819 |
|
|
int clen = cs.length; |
820 |
|
|
if (clen != 0) { |
821 |
dl |
1.28 |
long stamp = lock.writeLock(); |
822 |
dl |
1.1 |
try { |
823 |
|
|
for (int i = 0; i < clen; ++i) { |
824 |
jsr166 |
1.14 |
@SuppressWarnings("unchecked") |
825 |
|
|
E e = (E) cs[i]; |
826 |
dl |
1.28 |
if (findFirstIndex(array, e, 0, count) < 0) { |
827 |
dl |
1.4 |
rawAdd(e); |
828 |
dl |
1.1 |
++added; |
829 |
|
|
} |
830 |
|
|
} |
831 |
|
|
} finally { |
832 |
dl |
1.28 |
lock.unlockWrite(stamp); |
833 |
dl |
1.1 |
} |
834 |
|
|
} |
835 |
|
|
return added; |
836 |
|
|
} |
837 |
|
|
|
838 |
dl |
1.5 |
/** |
839 |
|
|
* Returns an iterator operating over a snapshot copy of the |
840 |
|
|
* elements of this collection created upon construction of the |
841 |
|
|
* iterator. The iterator does <em>NOT</em> support the |
842 |
jsr166 |
1.9 |
* {@code remove} method. |
843 |
dl |
1.5 |
* |
844 |
|
|
* @return an iterator over the elements in this list in proper sequence |
845 |
|
|
*/ |
846 |
|
|
public Iterator<E> snapshotIterator() { |
847 |
|
|
return new SnapshotIterator<E>(this); |
848 |
|
|
} |
849 |
|
|
|
850 |
|
|
static final class SnapshotIterator<E> implements Iterator<E> { |
851 |
jsr166 |
1.14 |
private final Object[] items; |
852 |
|
|
private int cursor; |
853 |
dl |
1.5 |
SnapshotIterator(ReadMostlyVector<E> v) { items = v.toArray(); } |
854 |
|
|
public boolean hasNext() { return cursor < items.length; } |
855 |
dl |
1.28 |
@SuppressWarnings("unchecked") public E next() { |
856 |
dl |
1.5 |
if (cursor < items.length) |
857 |
|
|
return (E) items[cursor++]; |
858 |
|
|
throw new NoSuchElementException(); |
859 |
|
|
} |
860 |
|
|
public void remove() { throw new UnsupportedOperationException() ; } |
861 |
|
|
} |
862 |
|
|
|
863 |
dl |
1.28 |
/** Interface describing a void action of one argument */ |
864 |
|
|
public interface Action<A> { void apply(A a); } |
865 |
|
|
|
866 |
|
|
public void forEachReadOnly(Action<E> action) { |
867 |
|
|
final StampedLock lock = this.lock; |
868 |
|
|
long stamp = lock.readLock(); |
869 |
|
|
try { |
870 |
jsr166 |
1.29 |
Object[] items; |
871 |
dl |
1.28 |
int len, n; |
872 |
|
|
if ((items = array) != null && (len = items.length) > 0 && |
873 |
|
|
(n = count) <= len) { |
874 |
|
|
for (int i = 0; i < n; ++i) { |
875 |
|
|
@SuppressWarnings("unchecked") E e = (E)items[i]; |
876 |
|
|
action.apply(e); |
877 |
|
|
} |
878 |
|
|
} |
879 |
|
|
} finally { |
880 |
|
|
lock.unlockRead(stamp); |
881 |
|
|
} |
882 |
|
|
} |
883 |
|
|
|
884 |
dl |
1.1 |
// Vector-only methods |
885 |
|
|
|
886 |
|
|
/** See {@link Vector#firstElement} */ |
887 |
|
|
public E firstElement() { |
888 |
dl |
1.28 |
final StampedLock lock = this.lock; |
889 |
|
|
long stamp = lock.tryOptimisticRead(); |
890 |
|
|
Object[] items; |
891 |
|
|
if ((items = array) != null && count > 0 && items.length > 0) { |
892 |
|
|
@SuppressWarnings("unchecked") E e = (E)items[0]; |
893 |
|
|
if (lock.validate(stamp)) |
894 |
|
|
return e; |
895 |
|
|
} |
896 |
|
|
return lockedFirstElement(); |
897 |
|
|
} |
898 |
|
|
|
899 |
|
|
@SuppressWarnings("unchecked") private E lockedFirstElement() { |
900 |
|
|
Object e = null; |
901 |
|
|
boolean oobe = false; |
902 |
|
|
final StampedLock lock = this.lock; |
903 |
|
|
long stamp = lock.readLock(); |
904 |
|
|
try { |
905 |
dl |
1.1 |
Object[] items = array; |
906 |
dl |
1.28 |
if (items != null && count > 0 && items.length > 0) |
907 |
|
|
e = items[0]; |
908 |
|
|
else |
909 |
|
|
oobe = true; |
910 |
|
|
} finally { |
911 |
|
|
lock.unlockRead(stamp); |
912 |
dl |
1.1 |
} |
913 |
dl |
1.28 |
if (oobe) |
914 |
|
|
throw new NoSuchElementException(); |
915 |
|
|
return (E) e; |
916 |
dl |
1.1 |
} |
917 |
|
|
|
918 |
|
|
/** See {@link Vector#lastElement} */ |
919 |
|
|
public E lastElement() { |
920 |
dl |
1.28 |
final StampedLock lock = this.lock; |
921 |
|
|
long stamp = lock.tryOptimisticRead(); |
922 |
|
|
Object[] items; |
923 |
|
|
int i; |
924 |
jsr166 |
1.29 |
if ((items = array) != null && (i = count - 1) >= 0 && |
925 |
dl |
1.28 |
i < items.length) { |
926 |
|
|
@SuppressWarnings("unchecked") E e = (E)items[i]; |
927 |
|
|
if (lock.validate(stamp)) |
928 |
|
|
return e; |
929 |
|
|
} |
930 |
|
|
return lockedLastElement(); |
931 |
|
|
} |
932 |
|
|
|
933 |
|
|
@SuppressWarnings("unchecked") private E lockedLastElement() { |
934 |
|
|
Object e = null; |
935 |
|
|
boolean oobe = false; |
936 |
|
|
final StampedLock lock = this.lock; |
937 |
|
|
long stamp = lock.readLock(); |
938 |
|
|
try { |
939 |
dl |
1.1 |
Object[] items = array; |
940 |
dl |
1.28 |
int i = count - 1; |
941 |
|
|
if (items != null && i >= 0 && i < items.length) |
942 |
|
|
e = items[i]; |
943 |
|
|
else |
944 |
|
|
oobe = true; |
945 |
|
|
} finally { |
946 |
|
|
lock.unlockRead(stamp); |
947 |
dl |
1.1 |
} |
948 |
dl |
1.28 |
if (oobe) |
949 |
|
|
throw new NoSuchElementException(); |
950 |
|
|
return (E) e; |
951 |
dl |
1.1 |
} |
952 |
|
|
|
953 |
|
|
/** See {@link Vector#indexOf(Object, int)} */ |
954 |
|
|
public int indexOf(Object o, int index) { |
955 |
dl |
1.28 |
if (index < 0) |
956 |
|
|
throw new ArrayIndexOutOfBoundsException(index); |
957 |
|
|
int idx; |
958 |
|
|
final StampedLock lock = this.lock; |
959 |
|
|
long stamp = lock.readLock(); |
960 |
|
|
try { |
961 |
|
|
idx = findFirstIndex(array, o, index, count); |
962 |
|
|
} finally { |
963 |
|
|
lock.unlockRead(stamp); |
964 |
dl |
1.1 |
} |
965 |
|
|
return idx; |
966 |
|
|
} |
967 |
|
|
|
968 |
|
|
/** See {@link Vector#lastIndexOf(Object, int)} */ |
969 |
|
|
public int lastIndexOf(Object o, int index) { |
970 |
dl |
1.28 |
boolean oobe = false; |
971 |
jsr166 |
1.23 |
int idx = -1; |
972 |
dl |
1.28 |
final StampedLock lock = this.lock; |
973 |
|
|
long stamp = lock.readLock(); |
974 |
|
|
try { |
975 |
|
|
if (index < count) |
976 |
|
|
idx = findLastIndex(array, o, index, 0); |
977 |
jsr166 |
1.29 |
else |
978 |
dl |
1.28 |
oobe = true; |
979 |
|
|
} finally { |
980 |
|
|
lock.unlockRead(stamp); |
981 |
dl |
1.1 |
} |
982 |
dl |
1.28 |
if (oobe) |
983 |
|
|
throw new ArrayIndexOutOfBoundsException(index); |
984 |
dl |
1.1 |
return idx; |
985 |
|
|
} |
986 |
|
|
|
987 |
|
|
/** See {@link Vector#setSize} */ |
988 |
|
|
public void setSize(int newSize) { |
989 |
|
|
if (newSize < 0) |
990 |
|
|
throw new ArrayIndexOutOfBoundsException(newSize); |
991 |
dl |
1.28 |
final StampedLock lock = this.lock; |
992 |
|
|
long stamp = lock.writeLock(); |
993 |
dl |
1.1 |
try { |
994 |
dl |
1.28 |
Object[] items; |
995 |
dl |
1.2 |
int n = count; |
996 |
|
|
if (newSize > n) |
997 |
dl |
1.1 |
grow(newSize); |
998 |
dl |
1.28 |
else if ((items = array) != null) { |
999 |
dl |
1.2 |
for (int i = newSize ; i < n ; i++) |
1000 |
dl |
1.11 |
items[i] = null; |
1001 |
dl |
1.1 |
} |
1002 |
|
|
count = newSize; |
1003 |
|
|
} finally { |
1004 |
dl |
1.28 |
lock.unlockWrite(stamp); |
1005 |
dl |
1.1 |
} |
1006 |
|
|
} |
1007 |
|
|
|
1008 |
|
|
/** See {@link Vector#copyInto} */ |
1009 |
|
|
public void copyInto(Object[] anArray) { |
1010 |
dl |
1.28 |
final StampedLock lock = this.lock; |
1011 |
|
|
long stamp = lock.writeLock(); |
1012 |
dl |
1.1 |
try { |
1013 |
dl |
1.28 |
Object[] items; |
1014 |
|
|
if ((items = array) != null) |
1015 |
|
|
System.arraycopy(items, 0, anArray, 0, count); |
1016 |
dl |
1.1 |
} finally { |
1017 |
dl |
1.28 |
lock.unlockWrite(stamp); |
1018 |
dl |
1.1 |
} |
1019 |
|
|
} |
1020 |
|
|
|
1021 |
|
|
/** See {@link Vector#trimToSize} */ |
1022 |
|
|
public void trimToSize() { |
1023 |
dl |
1.28 |
final StampedLock lock = this.lock; |
1024 |
|
|
long stamp = lock.writeLock(); |
1025 |
dl |
1.1 |
try { |
1026 |
dl |
1.11 |
Object[] items = array; |
1027 |
dl |
1.12 |
int n = count; |
1028 |
dl |
1.28 |
if (items != null && n < items.length) |
1029 |
dl |
1.12 |
array = Arrays.copyOf(items, n); |
1030 |
dl |
1.1 |
} finally { |
1031 |
dl |
1.28 |
lock.unlockWrite(stamp); |
1032 |
dl |
1.1 |
} |
1033 |
|
|
} |
1034 |
|
|
|
1035 |
|
|
/** See {@link Vector#ensureCapacity} */ |
1036 |
|
|
public void ensureCapacity(int minCapacity) { |
1037 |
|
|
if (minCapacity > 0) { |
1038 |
dl |
1.28 |
final StampedLock lock = this.lock; |
1039 |
|
|
long stamp = lock.writeLock(); |
1040 |
dl |
1.1 |
try { |
1041 |
dl |
1.28 |
Object[] items = array; |
1042 |
jsr166 |
1.30 |
int cap = (items == null) ? 0 : items.length; |
1043 |
dl |
1.28 |
if (minCapacity - cap > 0) |
1044 |
dl |
1.1 |
grow(minCapacity); |
1045 |
|
|
} finally { |
1046 |
dl |
1.28 |
lock.unlockWrite(stamp); |
1047 |
dl |
1.1 |
} |
1048 |
|
|
} |
1049 |
|
|
} |
1050 |
|
|
|
1051 |
|
|
/** See {@link Vector#elements} */ |
1052 |
|
|
public Enumeration<E> elements() { |
1053 |
jsr166 |
1.10 |
return new Itr<E>(this, 0); |
1054 |
dl |
1.1 |
} |
1055 |
|
|
|
1056 |
|
|
/** See {@link Vector#capacity} */ |
1057 |
|
|
public int capacity() { |
1058 |
|
|
return array.length; |
1059 |
|
|
} |
1060 |
|
|
|
1061 |
|
|
/** See {@link Vector#elementAt} */ |
1062 |
|
|
public E elementAt(int index) { |
1063 |
|
|
return get(index); |
1064 |
|
|
} |
1065 |
|
|
|
1066 |
|
|
/** See {@link Vector#setElementAt} */ |
1067 |
|
|
public void setElementAt(E obj, int index) { |
1068 |
|
|
set(index, obj); |
1069 |
|
|
} |
1070 |
|
|
|
1071 |
|
|
/** See {@link Vector#removeElementAt} */ |
1072 |
|
|
public void removeElementAt(int index) { |
1073 |
|
|
remove(index); |
1074 |
|
|
} |
1075 |
|
|
|
1076 |
|
|
/** See {@link Vector#insertElementAt} */ |
1077 |
|
|
public void insertElementAt(E obj, int index) { |
1078 |
|
|
add(index, obj); |
1079 |
|
|
} |
1080 |
|
|
|
1081 |
|
|
/** See {@link Vector#addElement} */ |
1082 |
|
|
public void addElement(E obj) { |
1083 |
|
|
add(obj); |
1084 |
|
|
} |
1085 |
|
|
|
1086 |
|
|
/** See {@link Vector#removeElement} */ |
1087 |
|
|
public boolean removeElement(Object obj) { |
1088 |
|
|
return remove(obj); |
1089 |
|
|
} |
1090 |
|
|
|
1091 |
|
|
/** See {@link Vector#removeAllElements} */ |
1092 |
|
|
public void removeAllElements() { |
1093 |
|
|
clear(); |
1094 |
|
|
} |
1095 |
|
|
|
1096 |
|
|
// other methods |
1097 |
|
|
|
1098 |
jsr166 |
1.10 |
public ReadMostlyVector<E> clone() { |
1099 |
dl |
1.1 |
Object[] a = null; |
1100 |
dl |
1.28 |
int n; |
1101 |
|
|
final StampedLock lock = this.lock; |
1102 |
|
|
long stamp = lock.readLock(); |
1103 |
|
|
try { |
1104 |
|
|
Object[] items = array; |
1105 |
|
|
if (items == null) |
1106 |
|
|
n = 0; |
1107 |
|
|
else { |
1108 |
|
|
int len = items.length; |
1109 |
|
|
if ((n = count) > len) |
1110 |
|
|
n = len; |
1111 |
|
|
a = Arrays.copyOf(items, n); |
1112 |
dl |
1.1 |
} |
1113 |
dl |
1.28 |
} finally { |
1114 |
|
|
lock.unlockRead(stamp); |
1115 |
dl |
1.1 |
} |
1116 |
jsr166 |
1.10 |
return new ReadMostlyVector<E>(a, n, capacityIncrement); |
1117 |
dl |
1.1 |
} |
1118 |
|
|
|
1119 |
|
|
private void writeObject(java.io.ObjectOutputStream s) |
1120 |
dl |
1.28 |
throws java.io.IOException { |
1121 |
|
|
final StampedLock lock = this.lock; |
1122 |
|
|
long stamp = lock.readLock(); |
1123 |
dl |
1.1 |
try { |
1124 |
|
|
s.defaultWriteObject(); |
1125 |
|
|
} finally { |
1126 |
dl |
1.28 |
lock.unlockRead(stamp); |
1127 |
dl |
1.1 |
} |
1128 |
|
|
} |
1129 |
|
|
|
1130 |
jsr166 |
1.15 |
static final class Itr<E> implements ListIterator<E>, Enumeration<E> { |
1131 |
dl |
1.28 |
final StampedLock lock; |
1132 |
dl |
1.1 |
final ReadMostlyVector<E> list; |
1133 |
|
|
Object[] items; |
1134 |
|
|
long seq; |
1135 |
|
|
int cursor; |
1136 |
|
|
int fence; |
1137 |
|
|
int lastRet; |
1138 |
|
|
|
1139 |
|
|
Itr(ReadMostlyVector<E> list, int index) { |
1140 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1141 |
|
|
long stamp = lock.readLock(); |
1142 |
|
|
try { |
1143 |
|
|
this.list = list; |
1144 |
|
|
this.lock = lock; |
1145 |
|
|
this.items = list.array; |
1146 |
|
|
this.fence = list.count; |
1147 |
|
|
this.cursor = index; |
1148 |
|
|
this.lastRet = -1; |
1149 |
|
|
} finally { |
1150 |
|
|
this.seq = lock.tryConvertToOptimisticRead(stamp); |
1151 |
|
|
} |
1152 |
dl |
1.1 |
if (index < 0 || index > fence) |
1153 |
|
|
throw new ArrayIndexOutOfBoundsException(index); |
1154 |
|
|
} |
1155 |
|
|
|
1156 |
dl |
1.28 |
public boolean hasPrevious() { |
1157 |
|
|
return cursor > 0; |
1158 |
|
|
} |
1159 |
|
|
|
1160 |
|
|
public int nextIndex() { |
1161 |
|
|
return cursor; |
1162 |
dl |
1.1 |
} |
1163 |
|
|
|
1164 |
dl |
1.28 |
public int previousIndex() { |
1165 |
|
|
return cursor - 1; |
1166 |
dl |
1.1 |
} |
1167 |
|
|
|
1168 |
dl |
1.28 |
public boolean hasNext() { |
1169 |
|
|
return cursor < fence; |
1170 |
dl |
1.1 |
} |
1171 |
|
|
|
1172 |
|
|
public E next() { |
1173 |
dl |
1.28 |
int i = cursor; |
1174 |
|
|
Object[] es = items; |
1175 |
|
|
if (es == null || i < 0 || i >= fence || i >= es.length) |
1176 |
|
|
throw new NoSuchElementException(); |
1177 |
|
|
@SuppressWarnings("unchecked") E e = (E)es[i]; |
1178 |
|
|
lastRet = i; |
1179 |
|
|
cursor = i + 1; |
1180 |
|
|
if (!lock.validate(seq)) |
1181 |
|
|
throw new ConcurrentModificationException(); |
1182 |
|
|
return e; |
1183 |
dl |
1.1 |
} |
1184 |
|
|
|
1185 |
|
|
public E previous() { |
1186 |
dl |
1.28 |
int i = cursor - 1; |
1187 |
|
|
Object[] es = items; |
1188 |
|
|
if (es == null || i < 0 || i >= fence || i >= es.length) |
1189 |
|
|
throw new NoSuchElementException(); |
1190 |
|
|
@SuppressWarnings("unchecked") E e = (E)es[i]; |
1191 |
|
|
lastRet = i; |
1192 |
|
|
cursor = i; |
1193 |
|
|
if (!lock.validate(seq)) |
1194 |
|
|
throw new ConcurrentModificationException(); |
1195 |
|
|
return e; |
1196 |
dl |
1.1 |
} |
1197 |
|
|
|
1198 |
|
|
public void remove() { |
1199 |
|
|
int i = lastRet; |
1200 |
|
|
if (i < 0) |
1201 |
|
|
throw new IllegalStateException(); |
1202 |
dl |
1.28 |
if ((seq = lock.tryConvertToWriteLock(seq)) == 0) |
1203 |
|
|
throw new ConcurrentModificationException(); |
1204 |
dl |
1.1 |
try { |
1205 |
dl |
1.28 |
list.rawRemoveAt(i); |
1206 |
|
|
fence = list.count; |
1207 |
|
|
cursor = i; |
1208 |
|
|
lastRet = -1; |
1209 |
dl |
1.1 |
} finally { |
1210 |
dl |
1.28 |
seq = lock.tryConvertToOptimisticRead(seq); |
1211 |
dl |
1.1 |
} |
1212 |
|
|
} |
1213 |
|
|
|
1214 |
|
|
public void set(E e) { |
1215 |
|
|
int i = lastRet; |
1216 |
dl |
1.28 |
Object[] es = items; |
1217 |
|
|
if (es == null || i < 0 | i >= fence) |
1218 |
dl |
1.1 |
throw new IllegalStateException(); |
1219 |
dl |
1.28 |
if ((seq = lock.tryConvertToWriteLock(seq)) == 0) |
1220 |
|
|
throw new ConcurrentModificationException(); |
1221 |
dl |
1.1 |
try { |
1222 |
dl |
1.28 |
es[i] = e; |
1223 |
dl |
1.1 |
} finally { |
1224 |
dl |
1.28 |
seq = lock.tryConvertToOptimisticRead(seq); |
1225 |
dl |
1.1 |
} |
1226 |
|
|
} |
1227 |
|
|
|
1228 |
|
|
public void add(E e) { |
1229 |
|
|
int i = cursor; |
1230 |
|
|
if (i < 0) |
1231 |
|
|
throw new IllegalStateException(); |
1232 |
dl |
1.28 |
if ((seq = lock.tryConvertToWriteLock(seq)) == 0) |
1233 |
|
|
throw new ConcurrentModificationException(); |
1234 |
dl |
1.1 |
try { |
1235 |
dl |
1.28 |
list.rawAddAt(i, e); |
1236 |
|
|
items = list.array; |
1237 |
|
|
fence = list.count; |
1238 |
|
|
cursor = i + 1; |
1239 |
|
|
lastRet = -1; |
1240 |
dl |
1.1 |
} finally { |
1241 |
dl |
1.28 |
seq = lock.tryConvertToOptimisticRead(seq); |
1242 |
dl |
1.1 |
} |
1243 |
|
|
} |
1244 |
|
|
|
1245 |
|
|
public boolean hasMoreElements() { return hasNext(); } |
1246 |
|
|
public E nextElement() { return next(); } |
1247 |
|
|
} |
1248 |
|
|
|
1249 |
jsr166 |
1.14 |
static final class ReadMostlyVectorSublist<E> |
1250 |
|
|
implements List<E>, RandomAccess, java.io.Serializable { |
1251 |
jsr166 |
1.33 |
private static final long serialVersionUID = 3041673470172026059L; |
1252 |
jsr166 |
1.14 |
|
1253 |
dl |
1.1 |
final ReadMostlyVector<E> list; |
1254 |
|
|
final int offset; |
1255 |
|
|
volatile int size; |
1256 |
|
|
|
1257 |
jsr166 |
1.14 |
ReadMostlyVectorSublist(ReadMostlyVector<E> list, |
1258 |
|
|
int offset, int size) { |
1259 |
dl |
1.1 |
this.list = list; |
1260 |
|
|
this.offset = offset; |
1261 |
|
|
this.size = size; |
1262 |
|
|
} |
1263 |
|
|
|
1264 |
|
|
private void rangeCheck(int index) { |
1265 |
|
|
if (index < 0 || index >= size) |
1266 |
|
|
throw new ArrayIndexOutOfBoundsException(index); |
1267 |
|
|
} |
1268 |
|
|
|
1269 |
|
|
public boolean add(E element) { |
1270 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1271 |
|
|
long stamp = lock.writeLock(); |
1272 |
dl |
1.1 |
try { |
1273 |
|
|
int c = size; |
1274 |
dl |
1.4 |
list.rawAddAt(c + offset, element); |
1275 |
dl |
1.1 |
size = c + 1; |
1276 |
|
|
} finally { |
1277 |
dl |
1.28 |
lock.unlockWrite(stamp); |
1278 |
dl |
1.1 |
} |
1279 |
|
|
return true; |
1280 |
|
|
} |
1281 |
|
|
|
1282 |
|
|
public void add(int index, E element) { |
1283 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1284 |
|
|
long stamp = lock.writeLock(); |
1285 |
dl |
1.1 |
try { |
1286 |
|
|
if (index < 0 || index > size) |
1287 |
|
|
throw new ArrayIndexOutOfBoundsException(index); |
1288 |
dl |
1.4 |
list.rawAddAt(index + offset, element); |
1289 |
dl |
1.1 |
++size; |
1290 |
|
|
} finally { |
1291 |
dl |
1.28 |
lock.unlockWrite(stamp); |
1292 |
dl |
1.1 |
} |
1293 |
|
|
} |
1294 |
|
|
|
1295 |
|
|
public boolean addAll(Collection<? extends E> c) { |
1296 |
|
|
Object[] elements = c.toArray(); |
1297 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1298 |
|
|
long stamp = lock.writeLock(); |
1299 |
dl |
1.1 |
try { |
1300 |
|
|
int s = size; |
1301 |
|
|
int pc = list.count; |
1302 |
dl |
1.4 |
list.rawAddAllAt(offset + s, elements); |
1303 |
jsr166 |
1.14 |
int added = list.count - pc; |
1304 |
dl |
1.1 |
size = s + added; |
1305 |
jsr166 |
1.14 |
return added != 0; |
1306 |
dl |
1.1 |
} finally { |
1307 |
dl |
1.28 |
lock.unlockWrite(stamp); |
1308 |
dl |
1.1 |
} |
1309 |
|
|
} |
1310 |
|
|
|
1311 |
|
|
public boolean addAll(int index, Collection<? extends E> c) { |
1312 |
|
|
Object[] elements = c.toArray(); |
1313 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1314 |
|
|
long stamp = lock.writeLock(); |
1315 |
dl |
1.1 |
try { |
1316 |
|
|
int s = size; |
1317 |
|
|
if (index < 0 || index > s) |
1318 |
|
|
throw new ArrayIndexOutOfBoundsException(index); |
1319 |
|
|
int pc = list.count; |
1320 |
dl |
1.4 |
list.rawAddAllAt(index + offset, elements); |
1321 |
jsr166 |
1.14 |
int added = list.count - pc; |
1322 |
dl |
1.1 |
size = s + added; |
1323 |
jsr166 |
1.14 |
return added != 0; |
1324 |
dl |
1.1 |
} finally { |
1325 |
dl |
1.28 |
lock.unlockWrite(stamp); |
1326 |
dl |
1.1 |
} |
1327 |
|
|
} |
1328 |
|
|
|
1329 |
|
|
public void clear() { |
1330 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1331 |
|
|
long stamp = lock.writeLock(); |
1332 |
dl |
1.1 |
try { |
1333 |
dl |
1.2 |
list.internalClear(offset, offset + size); |
1334 |
dl |
1.1 |
size = 0; |
1335 |
|
|
} finally { |
1336 |
dl |
1.28 |
lock.unlockWrite(stamp); |
1337 |
dl |
1.1 |
} |
1338 |
|
|
} |
1339 |
|
|
|
1340 |
|
|
public boolean contains(Object o) { |
1341 |
|
|
return indexOf(o) >= 0; |
1342 |
|
|
} |
1343 |
|
|
|
1344 |
|
|
public boolean containsAll(Collection<?> c) { |
1345 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1346 |
|
|
long stamp = lock.readLock(); |
1347 |
|
|
try { |
1348 |
|
|
return list.internalContainsAll(c, offset, offset + size); |
1349 |
|
|
} finally { |
1350 |
|
|
lock.unlockRead(stamp); |
1351 |
|
|
} |
1352 |
dl |
1.1 |
} |
1353 |
|
|
|
1354 |
|
|
public boolean equals(Object o) { |
1355 |
|
|
if (o == this) |
1356 |
|
|
return true; |
1357 |
|
|
if (!(o instanceof List)) |
1358 |
|
|
return false; |
1359 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1360 |
|
|
long stamp = lock.readLock(); |
1361 |
|
|
try { |
1362 |
|
|
return list.internalEquals((List<?>)(o), offset, offset + size); |
1363 |
|
|
} finally { |
1364 |
|
|
lock.unlockRead(stamp); |
1365 |
|
|
} |
1366 |
dl |
1.1 |
} |
1367 |
|
|
|
1368 |
|
|
public E get(int index) { |
1369 |
|
|
if (index < 0 || index >= size) |
1370 |
|
|
throw new ArrayIndexOutOfBoundsException(index); |
1371 |
|
|
return list.get(index + offset); |
1372 |
|
|
} |
1373 |
|
|
|
1374 |
|
|
public int hashCode() { |
1375 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1376 |
|
|
long stamp = lock.readLock(); |
1377 |
|
|
try { |
1378 |
|
|
return list.internalHashCode(offset, offset + size); |
1379 |
|
|
} finally { |
1380 |
|
|
lock.unlockRead(stamp); |
1381 |
|
|
} |
1382 |
dl |
1.1 |
} |
1383 |
|
|
|
1384 |
|
|
public int indexOf(Object o) { |
1385 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1386 |
|
|
long stamp = lock.readLock(); |
1387 |
dl |
1.1 |
try { |
1388 |
dl |
1.28 |
int idx = findFirstIndex(list.array, o, offset, offset + size); |
1389 |
dl |
1.1 |
return idx < 0 ? -1 : idx - offset; |
1390 |
|
|
} finally { |
1391 |
dl |
1.28 |
lock.unlockRead(stamp); |
1392 |
dl |
1.1 |
} |
1393 |
|
|
} |
1394 |
|
|
|
1395 |
|
|
public boolean isEmpty() { |
1396 |
dl |
1.28 |
return size() == 0; |
1397 |
dl |
1.1 |
} |
1398 |
|
|
|
1399 |
|
|
public Iterator<E> iterator() { |
1400 |
jsr166 |
1.10 |
return new SubItr<E>(this, offset); |
1401 |
dl |
1.1 |
} |
1402 |
|
|
|
1403 |
|
|
public int lastIndexOf(Object o) { |
1404 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1405 |
|
|
long stamp = lock.readLock(); |
1406 |
dl |
1.1 |
try { |
1407 |
dl |
1.28 |
int idx = findLastIndex(list.array, o, offset + size - 1, offset); |
1408 |
dl |
1.1 |
return idx < 0 ? -1 : idx - offset; |
1409 |
|
|
} finally { |
1410 |
dl |
1.28 |
lock.unlockRead(stamp); |
1411 |
dl |
1.1 |
} |
1412 |
|
|
} |
1413 |
|
|
|
1414 |
|
|
public ListIterator<E> listIterator() { |
1415 |
jsr166 |
1.10 |
return new SubItr<E>(this, offset); |
1416 |
dl |
1.1 |
} |
1417 |
|
|
|
1418 |
|
|
public ListIterator<E> listIterator(int index) { |
1419 |
jsr166 |
1.10 |
return new SubItr<E>(this, index + offset); |
1420 |
dl |
1.1 |
} |
1421 |
|
|
|
1422 |
|
|
public E remove(int index) { |
1423 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1424 |
|
|
long stamp = lock.writeLock(); |
1425 |
dl |
1.1 |
try { |
1426 |
dl |
1.4 |
Object[] items = list.array; |
1427 |
|
|
int i = index + offset; |
1428 |
dl |
1.28 |
if (items == null || index < 0 || index >= size || i >= items.length) |
1429 |
dl |
1.1 |
throw new ArrayIndexOutOfBoundsException(index); |
1430 |
dl |
1.28 |
@SuppressWarnings("unchecked") E result = (E)items[i]; |
1431 |
dl |
1.4 |
list.rawRemoveAt(i); |
1432 |
dl |
1.1 |
size--; |
1433 |
jsr166 |
1.14 |
return result; |
1434 |
dl |
1.1 |
} finally { |
1435 |
dl |
1.28 |
lock.unlockWrite(stamp); |
1436 |
dl |
1.1 |
} |
1437 |
|
|
} |
1438 |
|
|
|
1439 |
|
|
public boolean remove(Object o) { |
1440 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1441 |
|
|
long stamp = lock.writeLock(); |
1442 |
dl |
1.1 |
try { |
1443 |
dl |
1.28 |
if (list.rawRemoveAt(findFirstIndex(list.array, o, offset, |
1444 |
|
|
offset + size))) { |
1445 |
dl |
1.1 |
--size; |
1446 |
jsr166 |
1.14 |
return true; |
1447 |
dl |
1.1 |
} |
1448 |
jsr166 |
1.14 |
else |
1449 |
|
|
return false; |
1450 |
dl |
1.1 |
} finally { |
1451 |
dl |
1.28 |
lock.unlockWrite(stamp); |
1452 |
dl |
1.1 |
} |
1453 |
|
|
} |
1454 |
|
|
|
1455 |
|
|
public boolean removeAll(Collection<?> c) { |
1456 |
dl |
1.28 |
return list.lockedRemoveAll(c, offset, offset + size); |
1457 |
dl |
1.1 |
} |
1458 |
|
|
|
1459 |
|
|
public boolean retainAll(Collection<?> c) { |
1460 |
dl |
1.28 |
return list.lockedRetainAll(c, offset, offset + size); |
1461 |
dl |
1.1 |
} |
1462 |
|
|
|
1463 |
|
|
public E set(int index, E element) { |
1464 |
|
|
if (index < 0 || index >= size) |
1465 |
|
|
throw new ArrayIndexOutOfBoundsException(index); |
1466 |
|
|
return list.set(index+offset, element); |
1467 |
|
|
} |
1468 |
|
|
|
1469 |
|
|
public int size() { |
1470 |
|
|
return size; |
1471 |
|
|
} |
1472 |
|
|
|
1473 |
|
|
public List<E> subList(int fromIndex, int toIndex) { |
1474 |
|
|
int c = size; |
1475 |
|
|
int ssize = toIndex - fromIndex; |
1476 |
dl |
1.28 |
if (fromIndex < 0) |
1477 |
|
|
throw new ArrayIndexOutOfBoundsException(fromIndex); |
1478 |
|
|
if (toIndex > c || ssize < 0) |
1479 |
|
|
throw new ArrayIndexOutOfBoundsException(toIndex); |
1480 |
jsr166 |
1.10 |
return new ReadMostlyVectorSublist<E>(list, offset+fromIndex, ssize); |
1481 |
dl |
1.1 |
} |
1482 |
|
|
|
1483 |
|
|
public Object[] toArray() { |
1484 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1485 |
|
|
long stamp = lock.readLock(); |
1486 |
|
|
try { |
1487 |
|
|
return list.internalToArray(offset, offset + size); |
1488 |
|
|
} finally { |
1489 |
|
|
lock.unlockRead(stamp); |
1490 |
|
|
} |
1491 |
dl |
1.1 |
} |
1492 |
|
|
|
1493 |
|
|
public <T> T[] toArray(T[] a) { |
1494 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1495 |
|
|
long stamp = lock.readLock(); |
1496 |
|
|
try { |
1497 |
|
|
return list.internalToArray(a, offset, offset + size); |
1498 |
|
|
} finally { |
1499 |
|
|
lock.unlockRead(stamp); |
1500 |
|
|
} |
1501 |
dl |
1.1 |
} |
1502 |
|
|
|
1503 |
|
|
public String toString() { |
1504 |
dl |
1.28 |
final StampedLock lock = list.lock; |
1505 |
|
|
long stamp = lock.readLock(); |
1506 |
|
|
try { |
1507 |
|
|
return list.internalToString(offset, offset + size); |
1508 |
|
|
} finally { |
1509 |
|
|
lock.unlockRead(stamp); |
1510 |
|
|
} |
1511 |
dl |
1.1 |
} |
1512 |
|
|
|
1513 |
|
|
} |
1514 |
|
|
|
1515 |
|
|
static final class SubItr<E> implements ListIterator<E> { |
1516 |
|
|
final ReadMostlyVectorSublist<E> sublist; |
1517 |
|
|
final ReadMostlyVector<E> list; |
1518 |
dl |
1.28 |
final StampedLock lock; |
1519 |
dl |
1.1 |
Object[] items; |
1520 |
|
|
long seq; |
1521 |
|
|
int cursor; |
1522 |
dl |
1.28 |
int origin; |
1523 |
dl |
1.1 |
int fence; |
1524 |
|
|
int lastRet; |
1525 |
|
|
|
1526 |
|
|
SubItr(ReadMostlyVectorSublist<E> sublist, int index) { |
1527 |
dl |
1.28 |
final StampedLock lock = sublist.list.lock; |
1528 |
|
|
long stamp = lock.readLock(); |
1529 |
|
|
try { |
1530 |
|
|
this.sublist = sublist; |
1531 |
|
|
this.list = sublist.list; |
1532 |
|
|
this.lock = lock; |
1533 |
|
|
this.cursor = index; |
1534 |
|
|
this.origin = sublist.offset; |
1535 |
|
|
this.fence = origin + sublist.size; |
1536 |
|
|
this.lastRet = -1; |
1537 |
|
|
} finally { |
1538 |
|
|
this.seq = lock.tryConvertToOptimisticRead(stamp); |
1539 |
|
|
} |
1540 |
|
|
if (index < 0 || cursor > fence) |
1541 |
dl |
1.1 |
throw new ArrayIndexOutOfBoundsException(index); |
1542 |
|
|
} |
1543 |
|
|
|
1544 |
dl |
1.28 |
public int nextIndex() { |
1545 |
|
|
return cursor - origin; |
1546 |
|
|
} |
1547 |
|
|
|
1548 |
|
|
public int previousIndex() { |
1549 |
|
|
return cursor - origin - 1; |
1550 |
dl |
1.1 |
} |
1551 |
|
|
|
1552 |
|
|
public boolean hasNext() { |
1553 |
dl |
1.28 |
return cursor < fence; |
1554 |
dl |
1.1 |
} |
1555 |
|
|
|
1556 |
|
|
public boolean hasPrevious() { |
1557 |
dl |
1.28 |
return cursor > origin; |
1558 |
dl |
1.1 |
} |
1559 |
|
|
|
1560 |
|
|
public E next() { |
1561 |
dl |
1.28 |
int i = cursor; |
1562 |
|
|
Object[] es = items; |
1563 |
|
|
if (es == null || i < origin || i >= fence || i >= es.length) |
1564 |
|
|
throw new NoSuchElementException(); |
1565 |
|
|
@SuppressWarnings("unchecked") E e = (E)es[i]; |
1566 |
|
|
lastRet = i; |
1567 |
|
|
cursor = i + 1; |
1568 |
|
|
if (!lock.validate(seq)) |
1569 |
|
|
throw new ConcurrentModificationException(); |
1570 |
|
|
return e; |
1571 |
dl |
1.1 |
} |
1572 |
|
|
|
1573 |
|
|
public E previous() { |
1574 |
dl |
1.28 |
int i = cursor - 1; |
1575 |
|
|
Object[] es = items; |
1576 |
|
|
if (es == null || i < 0 || i >= fence || i >= es.length) |
1577 |
|
|
throw new NoSuchElementException(); |
1578 |
|
|
@SuppressWarnings("unchecked") E e = (E)es[i]; |
1579 |
|
|
lastRet = i; |
1580 |
|
|
cursor = i; |
1581 |
|
|
if (!lock.validate(seq)) |
1582 |
|
|
throw new ConcurrentModificationException(); |
1583 |
|
|
return e; |
1584 |
dl |
1.1 |
} |
1585 |
|
|
|
1586 |
|
|
public void remove() { |
1587 |
|
|
int i = lastRet; |
1588 |
|
|
if (i < 0) |
1589 |
|
|
throw new IllegalStateException(); |
1590 |
dl |
1.28 |
if ((seq = lock.tryConvertToWriteLock(seq)) == 0) |
1591 |
|
|
throw new ConcurrentModificationException(); |
1592 |
dl |
1.1 |
try { |
1593 |
dl |
1.28 |
list.rawRemoveAt(i); |
1594 |
|
|
fence = origin + sublist.size; |
1595 |
|
|
cursor = i; |
1596 |
|
|
lastRet = -1; |
1597 |
dl |
1.1 |
} finally { |
1598 |
dl |
1.28 |
seq = lock.tryConvertToOptimisticRead(seq); |
1599 |
dl |
1.1 |
} |
1600 |
|
|
} |
1601 |
|
|
|
1602 |
|
|
public void set(E e) { |
1603 |
|
|
int i = lastRet; |
1604 |
dl |
1.28 |
if (i < origin || i >= fence) |
1605 |
dl |
1.1 |
throw new IllegalStateException(); |
1606 |
dl |
1.28 |
if ((seq = lock.tryConvertToWriteLock(seq)) == 0) |
1607 |
|
|
throw new ConcurrentModificationException(); |
1608 |
dl |
1.1 |
try { |
1609 |
dl |
1.28 |
list.set(i, e); |
1610 |
dl |
1.1 |
} finally { |
1611 |
dl |
1.28 |
seq = lock.tryConvertToOptimisticRead(seq); |
1612 |
dl |
1.1 |
} |
1613 |
|
|
} |
1614 |
|
|
|
1615 |
|
|
public void add(E e) { |
1616 |
|
|
int i = cursor; |
1617 |
dl |
1.28 |
if (i < origin || i >= fence) |
1618 |
dl |
1.1 |
throw new IllegalStateException(); |
1619 |
dl |
1.28 |
if ((seq = lock.tryConvertToWriteLock(seq)) == 0) |
1620 |
|
|
throw new ConcurrentModificationException(); |
1621 |
dl |
1.1 |
try { |
1622 |
dl |
1.28 |
list.rawAddAt(i, e); |
1623 |
|
|
items = list.array; |
1624 |
|
|
fence = origin + sublist.size; |
1625 |
|
|
cursor = i + 1; |
1626 |
|
|
lastRet = -1; |
1627 |
dl |
1.1 |
} finally { |
1628 |
dl |
1.28 |
seq = lock.tryConvertToOptimisticRead(seq); |
1629 |
dl |
1.1 |
} |
1630 |
|
|
} |
1631 |
|
|
} |
1632 |
|
|
} |