001 /*
002 * Copyright 2001-2010 Stephen Colebourne
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016 package org.joda.primitives.list.impl;
017
018 import java.util.Collection;
019 import java.util.ConcurrentModificationException;
020 import java.util.Iterator;
021 import java.util.List;
022 import java.util.NoSuchElementException;
023
024 import org.joda.primitives.IntUtils;
025 import org.joda.primitives.collection.impl.AbstractIntCollection;
026 import org.joda.primitives.iterator.IntIterator;
027 import org.joda.primitives.list.IntList;
028 import org.joda.primitives.listiterator.IntListIterator;
029
030 /**
031 * Abstract base class for lists of primitive <code>int</code> elements.
032 * <p>
033 * This class implements {@link java.util.Collection Collection} allowing
034 * seamless integration with other APIs.
035 * <p>
036 * The <code>get(int)</code> and <code>size()</code> methods must be
037 * implemented by subclases.
038 * To make the subclass modifiable, the <code>add(int, int)</code>,
039 * <code>removeIndex(int)</code> and set(int, int) must also be implemented.
040 * Subclasses may override other methods to increase efficiency.
041 *
042 * @author Stephen Colebourne
043 * @author Rodney Waldhoff
044 * @author Jason Tiscione
045 * @version CODE GENERATED
046 * @since 1.0
047 */
048 public abstract class AbstractIntList extends AbstractIntCollection implements IntList {
049 // This file is CODE GENERATED. Do not change manually.
050
051 /**
052 * Constructor.
053 */
054 protected AbstractIntList() {
055 super();
056 }
057
058 // IntList methods
059 //-----------------------------------------------------------------------
060 /**
061 * Gets an iterator over this list.
062 *
063 * @return an iterator over this list, not null
064 */
065 public IntListIterator iterator() {
066 return listIterator(0);
067 }
068
069 /**
070 * Gets a list iterator over this list.
071 * <p>
072 * This implementation uses <code>intListIterator(int)</code>.
073 *
074 * @return an iterator over this list, not null
075 */
076 public IntListIterator listIterator() {
077 return listIterator(0);
078 }
079
080 /**
081 * Gets a list iterator over this list from a start index.
082 *
083 * @param index the index to start from
084 * @return an iterator over this list, not null
085 * @throws IndexOutOfBoundsException if the index is invalid
086 */
087 public IntListIterator listIterator(int index) {
088 checkIndex(index);
089 return new PListIterator(this, index);
090 }
091
092 /**
093 * Gets the first primitive value.
094 *
095 * @return value at index zero
096 * @throws IndexOutOfBoundsException if the size is zero
097 */
098 public int firstInt() {
099 return getInt(0);
100 }
101
102 /**
103 * Gets the last primitive value.
104 *
105 * @return value at index <code>size() - 1</code>
106 * @throws IndexOutOfBoundsException if the size is zero
107 */
108 public int lastInt() {
109 return getInt(size() - 1);
110 }
111
112 /**
113 * Checks whether this collection contains a specified primitive value.
114 * <p>
115 * This implementation uses <code>getInt(int)</code>.
116 *
117 * @param value the value to search for
118 * @return <code>true</code> if the value is found
119 */
120 public boolean contains(int value) {
121 for (int i = 0, isize = size(); i < isize; i++) {
122 if (getInt(i) == value) {
123 return true;
124 }
125 }
126 return false;
127 }
128
129 /**
130 * Gets the first index of the specified primitive value.
131 * <p>
132 * This implementation uses <code>indexof(int, int)</code>.
133 *
134 * @param value the value to search for
135 * @return the zero-based index, or <code>-1</code> if not found
136 */
137 public int indexOf(int value) {
138 return indexOf(value, 0);
139 }
140
141 /**
142 * Gets the first index of the specified primitive value from an index.
143 * <p>
144 * This method follows the conventions of <code>String</code> in that a
145 * negative index is treated as zero, and an index greater than the list
146 * size will simply return <code>-1</code>.
147 * <p>
148 * This implementation uses <code>get(int)</code>.
149 *
150 * @param value the value to search for
151 * @param fromIndexInclusive the index to start searching from, inclusive
152 * @return the zero-based index, or <code>-1</code> if not found
153 */
154 public int indexOf(int value, int fromIndexInclusive) {
155 if (fromIndexInclusive < 0) {
156 fromIndexInclusive = 0;
157 }
158 for (int i = fromIndexInclusive, isize = size(); i < isize; i++) {
159 if (getInt(i) == value) {
160 return i;
161 }
162 }
163 return -1;
164 }
165
166 /**
167 * Gets the last index of the specified primitive value.
168 * <p>
169 * This implementation uses <code>lastIndexof(int, int)</code>.
170 *
171 * @param value the value to search for
172 * @return the zero-based index, or <code>-1</code> if not found
173 */
174 public int lastIndexOf(int value) {
175 return lastIndexOf(value, size());
176 }
177
178 /**
179 * Gets the first index of the specified primitive value from an index.
180 * <p>
181 * This method follows the conventions of <code>String</code> in that an
182 * index greater than the list size will start searching at the list size,
183 * and a negative index simply returns <code>-1</code>.
184 * <p>
185 * This implementation uses <code>get(int)</code>.
186 *
187 * @param value the value to search for
188 * @param fromIndexInclusive the index to start searching from, inclusive
189 * @return the zero-based index, or <code>-1</code> if not found
190 */
191 public int lastIndexOf(int value, int fromIndexInclusive) {
192 if (fromIndexInclusive >= size()) {
193 fromIndexInclusive = size() - 1;
194 }
195 for (int i = fromIndexInclusive; i >= 0; i--) {
196 if (getInt(i) == value) {
197 return i;
198 }
199 }
200 return -1;
201 }
202
203 /**
204 * Gets a range of elements as an array.
205 *
206 * @param fromIndexInclusive the index to start from, inclusive
207 * @param toIndexExclusive the index to end at, exclusive
208 * @return a new array containing a copy of the range of elements, not null
209 * @throws IndexOutOfBoundsException if either index is invalid
210 */
211 public int[] toIntArray(int fromIndexInclusive, int toIndexExclusive) {
212 checkRange(fromIndexInclusive, toIndexExclusive);
213
214 if (fromIndexInclusive == toIndexExclusive) {
215 return IntUtils.EMPTY_INT_ARRAY;
216 }
217 int size = toIndexExclusive - fromIndexInclusive;
218 int[] result = new int[size];
219 arrayCopy(fromIndexInclusive, result, 0, size);
220 return result;
221 }
222
223 /**
224 * Gets a range view of part of this list.
225 * <p>
226 * This method allows operations to work on a range within the greater list.
227 * Changes made to the either object will affect the other.
228 *
229 * @param fromIndexInclusive the index to start from, inclusive
230 * @param toIndexExclusive the index to end at, exclusive
231 * @return a new IntList for the subList, not null
232 * @throws IndexOutOfBoundsException if either index is invalid
233 */
234 public IntList subList(int fromIndexInclusive, int toIndexExclusive) {
235 return null; // TODO
236 }
237
238 /**
239 * Clears the listof all elements (optional operation).
240 * <p>
241 * This implementation uses <code>removeRange(int, int)</code>.
242 *
243 * @throws UnsupportedOperationException if method not supported by this collection
244 */
245 public void clear() {
246 removeRange(0, size());
247 }
248
249 /**
250 * Adds a primitive value to this collection (optional operation).
251 * <p>
252 * This implementation uses <code>add(int, int)</code>.
253 *
254 * @param value the value to add to this collection
255 * @return <code>true</code> if this collection was modified by this method call
256 * @throws IllegalArgumentException if value is rejected by this collection
257 * @throws UnsupportedOperationException if not supported by this collection
258 */
259 public boolean add(int value) {
260 checkAddModifiable();
261 return add(size(), value);
262 }
263
264 /**
265 * Adds a primitive value to this list at an index (optional operation).
266 * <p>
267 * This implementation throws UnsupportedOperationException.
268 *
269 * @param index the index to add at
270 * @param value the value to add to this collection
271 * @return <code>true</code> if this list was modified by this method call
272 * @throws IndexOutOfBoundsException if the index is invalid
273 * @throws IllegalArgumentException if value is rejected by this collection
274 * @throws UnsupportedOperationException if not supported by this collection
275 */
276 public boolean add(int index, int value) {
277 throw new UnsupportedOperationException("List does not support add");
278 }
279
280 /**
281 * Adds an array of primitive values to this list at an index (optional operation).
282 * <p>
283 * This implementation uses <code>addAll(int, int)</code>.
284 *
285 * @param values the values to add to this collection, null treated as empty array
286 * @return <code>true</code> if this list was modified by this method call
287 * @throws IndexOutOfBoundsException if the index is invalid
288 * @throws IllegalArgumentException if value is rejected by this collection
289 * @throws UnsupportedOperationException if not supported by this collection
290 */
291 public boolean addAll(int[] values) {
292 checkAddModifiable();
293 return addAll(size(), values);
294 }
295
296 /**
297 * Adds an array of primitive values to this list at an index (optional operation).
298 * <p>
299 * This method is optional, throwing an UnsupportedOperationException if the
300 * collection cannot be added to.
301 *
302 * @param index the index to add at
303 * @param values the values to add to this collection, null treated as empty array
304 * @return <code>true</code> if this list was modified by this method call
305 * @throws IndexOutOfBoundsException if the index is invalid
306 * @throws IllegalArgumentException if value is rejected by this collection
307 * @throws UnsupportedOperationException if not supported by this collection
308 */
309 public boolean addAll(int index, int[] values) {
310 checkAddModifiable();
311 checkIndex(index);
312 boolean changed = false;
313 if (values != null) {
314 for (int i = 0; i < values.length; i++) {
315 changed |= add(index + i, values[i]);
316 }
317 }
318 return changed;
319 }
320
321 /**
322 * Removes a primitive value by index from the list (optional operation).
323 * <p>
324 * This implementation throws UnsupportedOperationException.
325 *
326 * @param index the index to remove from
327 * @return the primitive value previously at this index
328 * @throws IndexOutOfBoundsException if the index is invalid
329 * @throws UnsupportedOperationException if not supported by this collection
330 */
331 public int removeIntAt(int index) {
332 throw new UnsupportedOperationException("List does not support remove");
333 }
334
335 /**
336 * Removes the first occurrence of a primitive value from the list (optional operation).
337 * <p>
338 * This implementation uses <code>get(int)</code> and <code>removeIntAt(int)</code>.
339 *
340 * @param value the value to remove
341 * @return the primitive value previously at this index
342 * @throws UnsupportedOperationException if not supported by this collection
343 */
344 public boolean removeInt(int value) {
345 checkRemoveModifiable();
346 for (int i = 0, isize = size(); i < isize; i++) {
347 if (getInt(i) == value) {
348 removeIntAt(i);
349 return true;
350 }
351 }
352 return false;
353 }
354
355 /**
356 * Removes a range of values from the list (optional operation).
357 * <p>
358 * This implementation uses <code>removeIntAt(int)</code>.
359 *
360 * @param fromIndexInclusive the start of the range to remove, inclusive
361 * @param toIndexExclusive the end of the range to remove, exclusive
362 * @return <code>true</code> if the collection was modified
363 * @throws IndexOutOfBoundsException if the index is invalid
364 * @throws UnsupportedOperationException if remove is not supported
365 */
366 public boolean removeRange(int fromIndexInclusive, int toIndexExclusive) {
367 checkRemoveModifiable();
368 checkRange(fromIndexInclusive, toIndexExclusive);
369 if (fromIndexInclusive == toIndexExclusive) {
370 return false;
371 }
372 for (int i = size() - 1; i >= 0; i--) {
373 removeIntAt(i);
374 }
375 return true;
376 }
377
378 /**
379 * Sets the primitive value at a specified index.
380 * <p>
381 * This implementation throws UnsupportedOperationException.
382 *
383 * @param index the index to set
384 * @param value the value to store
385 * @return the previous value at the index
386 * @throws IndexOutOfBoundsException if the index is invalid
387 * @throws IllegalArgumentException if value is rejected by this collection
388 * @throws UnsupportedOperationException if not supported by this collection
389 */
390 public int set(int index, int value) {
391 throw new UnsupportedOperationException("List does not support set");
392 }
393
394 // List methods
395 //-----------------------------------------------------------------------
396 /**
397 * Gets the <code>Integer</code> value at the specified index.
398 *
399 * @param index the index to get from
400 * @return value at the index
401 * @throws IndexOutOfBoundsException if the index is invalid
402 */
403 public Integer get(int index) {
404 return IntUtils.toObject(getInt(index));
405 }
406
407 /**
408 * Gets the first <code>Integer</code> value.
409 *
410 * @return value at index zero or null if the size is zero
411 */
412 public Integer first() {
413 if (size() == 0) {
414 return null;
415 }
416 return get(0);
417 }
418
419 /**
420 * Gets the last <code>Integer</code> value.
421 *
422 * @return value at index <code>size() - 1</code> or null if the size is zero
423 */
424 public Integer last() {
425 if (size() == 0) {
426 return null;
427 }
428 return get(size() - 1);
429 }
430
431 /**
432 * Gets the first index of the specified <code>Integer</code> value.
433 *
434 * @param value the value to search for
435 * @return the zero-based index, or <code>-1</code> if not found
436 * @throws NullPointerException if the value if null
437 * @throws ClassCastException if the object is not <code>Integer</code>
438 */
439 public int indexOf(Object value) {
440 return indexOf(IntUtils.toPrimitive(value));
441 }
442
443 /**
444 * Gets the first index of the specified <code>Integer</code> value from an index.
445 * <p>
446 * This method follows the conventions of <code>String</code> in that a
447 * negative index is treated as zero, and an index greater than the list
448 * size will simply return <code>-1</code>.
449 *
450 * @param value the value to search for
451 * @param fromIndexInclusive the index to start searching from, inclusive
452 * @return the zero-based index, or <code>-1</code> if not found
453 * @throws NullPointerException if the value if null
454 * @throws ClassCastException if the object is not <code>Integer</code>
455 */
456 public int indexOf(Object value, int fromIndexInclusive) {
457 return indexOf(IntUtils.toPrimitive(value), fromIndexInclusive);
458 }
459
460 /**
461 * Gets the last index of the specified <code>Integer</code> value.
462 *
463 * @param value the value to search for
464 * @return the zero-based index, or <code>-1</code> if not found
465 * @throws NullPointerException if the value if null
466 * @throws ClassCastException if the object is not <code>Integer</code>
467 */
468 public int lastIndexOf(Object value) {
469 return lastIndexOf(IntUtils.toPrimitive(value));
470 }
471
472 /**
473 * Gets the first index of the specified <code>Integer</code> value from an index.
474 * <p>
475 * This method follows the conventions of <code>String</code> in that an
476 * index greater than the list size will start searching at the list size,
477 * and a negative index simply returns <code>-1</code>.
478 *
479 * @param value the value to search for
480 * @param fromIndexInclusive the index to start searching from, inclusive
481 * @return the zero-based index, or <code>-1</code> if not found
482 * @throws NullPointerException if the value if null
483 * @throws ClassCastException if the object is not <code>Integer</code>
484 */
485 public int lastIndexOf(Object value, int fromIndexInclusive) {
486 return lastIndexOf(IntUtils.toPrimitive(value), fromIndexInclusive);
487 }
488
489 /**
490 * Adds the <code>Integer</code> value to this collection (optional operation).
491 * <p>
492 * This method is optional, throwing an UnsupportedOperationException if the
493 * collection cannot be added to.
494 *
495 * @param value the value to add to this collection
496 * @return <code>true</code> if this collection was modified by this method call
497 * @throws IllegalArgumentException if value is rejected by this collection
498 * @throws UnsupportedOperationException if not supported by this collection
499 */
500 public boolean add(Integer value) {
501 checkAddModifiable();
502 return add(size(), IntUtils.toPrimitive(value));
503 }
504
505 /**
506 * Adds the <code>Integer</code> value to this list at an index (optional operation).
507 * <p>
508 * This method is optional, throwing an UnsupportedOperationException if the
509 * collection cannot be added to.
510 *
511 * @param index the index to add at
512 * @param value the value to add to this collection
513 * @throws IndexOutOfBoundsException if the index is invalid
514 * @throws ClassCastException if the object is not <code>Integer</code>
515 * @throws IllegalArgumentException if value is rejected by this collection
516 * @throws UnsupportedOperationException if not supported by this collection
517 */
518 public void add(int index, Integer value) {
519 checkAddModifiable();
520 checkIndex(index);
521 add(index, IntUtils.toPrimitive(value));
522 }
523
524 /**
525 * Adds an array of <code>Integer</code> values to this list at an index (optional operation).
526 * <p>
527 * This method is optional, throwing an UnsupportedOperationException if the
528 * collection cannot be added to.
529 *
530 * @param index the index to add at
531 * @param coll the values to add to this collection
532 * @return <code>true</code> if this list was modified by this method call
533 * @throws IndexOutOfBoundsException if the index is invalid
534 * @throws ClassCastException if any object is not <code>Integer</code>
535 * @throws IllegalArgumentException if value is rejected by this collection
536 * @throws UnsupportedOperationException if not supported by this collection
537 */
538 public boolean addAll(int index, Collection<? extends Integer> coll) {
539 checkAddModifiable();
540 checkIndex(index);
541 return addAll(index, IntUtils.toPrimitiveArray(coll));
542 }
543
544 /**
545 * Removes a primitive value by index from the list (optional operation).
546 * <p>
547 * This implementation uses <code>removeIntAt(int)</code>.
548 *
549 * @deprecated This method should only be used when working with List and
550 * not when working with IntList - use <code>removeIntAt(int)</code>
551 * @param index the index to remove from
552 * @return the primitive value previously at this index
553 * @throws IndexOutOfBoundsException if the index is invalid
554 * @throws UnsupportedOperationException if not supported by this collection
555 */
556 public Integer remove(int index) {
557 checkRemoveModifiable();
558 return IntUtils.toObject(removeIntAt(index));
559 }
560
561 /**
562 * Sets the <code>Integer</code> value at a specified index.
563 * <p>
564 * This implementation uses <code>set(int, int)</code>.
565 *
566 * @param index the index to set
567 * @param value the value to store
568 * @return the previous value at the index
569 * @throws IndexOutOfBoundsException if the index is invalid
570 * @throws IllegalArgumentException if value is rejected by this collection
571 * @throws UnsupportedOperationException if not supported by this collection
572 */
573 public Integer set(int index, Integer value) {
574 checkSetModifiable();
575 checkIndexExists(index);
576 return IntUtils.toObject(set(index, IntUtils.toPrimitive(value)));
577 }
578
579 //-----------------------------------------------------------------------
580 /**
581 * Compares this list to another as per the contract of <code>List</code>.
582 *
583 * @param obj the object to compare to
584 * @return <code>true</code> if the lists are equal
585 */
586 public boolean equals(Object obj) {
587 if (obj == this) {
588 return true;
589 }
590 if (obj instanceof IntList) {
591 IntList other = (IntList) obj;
592 if (size() != other.size()) {
593 return false;
594 }
595 IntIterator it1 = listIterator();
596 IntIterator it2 = other.listIterator();
597 while (it1.hasNext() && it2.hasNext()) {
598 if (it1.nextInt() != it2.nextInt()) {
599 return false;
600 }
601 }
602 return true;
603 } else if (obj instanceof List<?>) {
604 List<?> other = (List<?>) obj;
605 if (size() != other.size()) {
606 return false;
607 }
608 IntIterator it1 = listIterator();
609 Iterator<?> it2 = other.listIterator();
610 while (it1.hasNext() && it2.hasNext()) {
611 Object next = it2.next();
612 if (isToPrimitivePossible(next) == false) {
613 return false;
614 }
615 if (it1.nextInt() != toPrimitive(next)) {
616 return false;
617 }
618 }
619 return true;
620 } else {
621 return false;
622 }
623 }
624
625 /**
626 * Gets the hashCode of this list as per the contract of <code>List</code>.
627 *
628 * @return the hash code for this list
629 */
630 public int hashCode() {
631 int hashCode = 1;
632 Iterator<Integer> it = iterator();
633 while (it.hasNext()) {
634 Object obj = it.next();
635 hashCode = 31 * hashCode + (obj == null ? 0 : obj.hashCode());
636 }
637 return hashCode;
638 }
639
640 //-----------------------------------------------------------------------
641 /**
642 * Copies data from this collection into the specified array.
643 * This method is pre-validated.
644 *
645 * @param fromIndex the index to start from
646 * @param dest the destination array
647 * @param destIndex the destination start index
648 * @param size the number of items to copy
649 */
650 protected void arrayCopy(int fromIndex, int[] dest, int destIndex, int size) {
651 for (int i = 0; i < size; i++) {
652 dest[i + destIndex] = getInt(i + fromIndex);
653 }
654 }
655
656 /**
657 * Are the set methods supported.
658 * <p>
659 * This implementation returns false.
660 *
661 * @return true if supported
662 */
663 protected boolean isSetModifiable() {
664 return false;
665 }
666
667 /**
668 * Is the collection modifiable in any way.
669 *
670 * @return true if supported
671 */
672 public boolean isModifiable() {
673 return isAddModifiable() || isRemoveModifiable() || isSetModifiable();
674 }
675
676 /**
677 * Check whether add is suported and throw an exception.
678 */
679 protected void checkSetModifiable() {
680 if (isSetModifiable() == false) {
681 throw new UnsupportedOperationException("Collection does not support set");
682 }
683 }
684
685 /**
686 * Checks whether an index is valid or not.
687 *
688 * @param index the index to check
689 * @throws IndexOutOfBoundsException if either index is invalid
690 */
691 protected void checkIndexExists(int index) {
692 if (index < 0) {
693 throw new ArrayIndexOutOfBoundsException(
694 "Index less than zero: " + index + " < 0");
695 }
696 if (index >= size()) {
697 throw new ArrayIndexOutOfBoundsException(
698 "Index greater than/equal to size(): " + index + " >= " + size());
699 }
700 }
701
702 /**
703 * Checks whether an index is valid or not.
704 *
705 * @param index the index to check
706 * @throws IndexOutOfBoundsException if either index is invalid
707 */
708 protected void checkIndex(int index) {
709 if (index < 0) {
710 throw new ArrayIndexOutOfBoundsException(
711 "Index less than zero: " + index + " < 0");
712 }
713 if (index > size()) {
714 throw new ArrayIndexOutOfBoundsException(
715 "Index greater than size(): " + index + " > " + size());
716 }
717 }
718
719 /**
720 * Checks whether a range is valid or not.
721 *
722 * @param fromIndexInclusive the index to start from, inclusive
723 * @param toIndexExclusive the index to end at, exclusive
724 * @throws IndexOutOfBoundsException if either index is invalid
725 */
726 protected void checkRange(int fromIndexInclusive, int toIndexExclusive) {
727 if (fromIndexInclusive < 0) {
728 throw new ArrayIndexOutOfBoundsException(
729 "From index less than zero: " + fromIndexInclusive + " < 0");
730 }
731 if (toIndexExclusive > size()) {
732 throw new ArrayIndexOutOfBoundsException(
733 "To index greater than size(): " + toIndexExclusive + " > " + size());
734 }
735 if (fromIndexInclusive > toIndexExclusive) {
736 throw new ArrayIndexOutOfBoundsException(
737 "To index greater than from index: " + fromIndexInclusive + " > " + toIndexExclusive);
738 }
739 }
740
741 //-----------------------------------------------------------------------
742 /**
743 * List iterator.
744 */
745 protected static class PListIterator implements IntListIterator {
746
747 private final AbstractIntList iList;
748 private final int iStart;
749 private int iCursor = 0;
750 private int iLastIndex = -1;
751
752 protected PListIterator(AbstractIntList list, int start) {
753 super();
754 this.iList = list;
755 this.iStart = start;
756 this.iCursor = start;
757 }
758
759 //-----------------------------------------------------------------------
760 public boolean hasNext() {
761 return (iCursor < iList.size());
762 }
763
764 public int nextInt() {
765 if (hasNext() == false) {
766 throw new NoSuchElementException("No more elements available");
767 }
768 iLastIndex = iCursor;
769 return iList.getInt(iCursor++);
770 }
771
772 public Integer next() {
773 return iList.toObject(nextInt());
774 }
775
776 public int nextIndex() {
777 return iCursor;
778 }
779
780 //-----------------------------------------------------------------------
781 public boolean hasPrevious() {
782 return (iCursor > 0);
783 }
784
785 public int previousInt() {
786 if (hasPrevious() == false) {
787 throw new NoSuchElementException("No more elements available");
788 }
789 iLastIndex = --iCursor;
790 return iList.getInt(iCursor);
791 }
792
793 public Integer previous() {
794 return iList.toObject(previousInt());
795 }
796
797 public int previousIndex() {
798 return iCursor - 1;
799 }
800
801 //-----------------------------------------------------------------------
802 public void remove() {
803 iList.checkRemoveModifiable();
804 if (iLastIndex == -1) {
805 throw new IllegalStateException("Element cannot be removed");
806 }
807 iList.removeIntAt(iLastIndex);
808 iCursor = iLastIndex;
809 iLastIndex = -1;
810 }
811
812 public void add(int value) {
813 iList.checkAddModifiable();
814 try {
815 iList.add(iCursor++, value);
816 iLastIndex = -1;
817 } catch (IndexOutOfBoundsException ex) {
818 throw new ConcurrentModificationException("The underlying list was modified");
819 }
820 }
821
822 public void add(Integer obj) {
823 iList.checkAddModifiable();
824 add(iList.toPrimitive(obj));
825 }
826
827 public void set(int value) {
828 iList.checkSetModifiable();
829 if (iLastIndex == -1) {
830 throw new IllegalStateException("Element cannot be set");
831 }
832 try {
833 iList.set(iLastIndex, value);
834 } catch (IndexOutOfBoundsException ex) {
835 throw new ConcurrentModificationException("The underlying list was modified");
836 }
837 }
838
839 public void set(Integer obj) {
840 iList.checkSetModifiable();
841 set(iList.toPrimitive(obj));
842 }
843
844 //-----------------------------------------------------------------------
845 public boolean isModifiable() {
846 return iList.isModifiable();
847 }
848
849 public boolean isResettable() {
850 return true;
851 }
852
853 public void reset() {
854 iCursor = iStart;
855 }
856
857 }
858
859 }
860