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package org.apache.commons.collections.primitives; |
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import java.util.ConcurrentModificationException; |
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import java.util.NoSuchElementException; |
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public abstract class RandomAccessByteList extends AbstractByteCollection implements ByteList { |
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46 | 801 | protected RandomAccessByteList() { |
47 | 801 | } |
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public abstract byte get(int index); |
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public abstract int size(); |
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public byte removeElementAt(int index) { |
63 | 1 | throw new UnsupportedOperationException(); |
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} |
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public byte set(int index, byte element) { |
71 | 2 | throw new UnsupportedOperationException(); |
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} |
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public void add(int index, byte element) { |
79 | 2 | throw new UnsupportedOperationException(); |
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} |
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public boolean add(byte element) { |
87 | 3008 | add(size(),element); |
88 | 3006 | return true; |
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} |
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public boolean addAll(int index, ByteCollection collection) { |
92 | 1 | boolean modified = false; |
93 | 1 | for(ByteIterator iter = collection.iterator(); iter.hasNext(); ) { |
94 | 7 | add(index++,iter.next()); |
95 | 7 | modified = true; |
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} |
97 | 1 | return modified; |
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} |
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public int indexOf(byte element) { |
101 | 84 | int i = 0; |
102 | 84 | for(ByteIterator iter = iterator(); iter.hasNext(); ) { |
103 | 948 | if(iter.next() == element) { |
104 | 42 | return i; |
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} else { |
106 | 906 | i++; |
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} |
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} |
109 | 42 | return -1; |
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} |
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public int lastIndexOf(byte element) { |
113 | 84 | for(ByteListIterator iter = listIterator(size()); iter.hasPrevious(); ) { |
114 | 948 | if(iter.previous() == element) { |
115 | 42 | return iter.nextIndex(); |
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} |
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} |
118 | 42 | return -1; |
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} |
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public ByteIterator iterator() { |
122 | 6823 | return listIterator(); |
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} |
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public ByteListIterator listIterator() { |
126 | 8092 | return listIterator(0); |
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} |
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public ByteListIterator listIterator(int index) { |
130 | 8322 | return new RandomAccessByteListIterator(this,index); |
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} |
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public ByteList subList(int fromIndex, int toIndex) { |
134 | 171 | return new RandomAccessByteSubList(this,fromIndex,toIndex); |
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} |
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public boolean equals(Object that) { |
138 | 32 | if(this == that) { |
139 | 3 | return true; |
140 | 29 | } else if(that instanceof ByteList) { |
141 | 26 | ByteList thatList = (ByteList)that; |
142 | 26 | if(size() != thatList.size()) { |
143 | 4 | return false; |
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} |
145 | 22 | for(ByteIterator thatIter = thatList.iterator(), thisIter = iterator(); thisIter.hasNext();) { |
146 | 120 | if(thisIter.next() != thatIter.next()) { |
147 | 2 | return false; |
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} |
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} |
150 | 20 | return true; |
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} else { |
152 | 3 | return false; |
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} |
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} |
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public int hashCode() { |
157 | 1165 | int hash = 1; |
158 | 1165 | for(ByteIterator iter = iterator(); iter.hasNext(); ) { |
159 | 15509 | hash = 31*hash + iter.next(); |
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} |
161 | 1165 | return hash; |
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} |
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public String toString() { |
165 | 6 | StringBuffer buf = new StringBuffer(); |
166 | 6 | buf.append("["); |
167 | 6 | for(ByteIterator iter = iterator(); iter.hasNext();) { |
168 | 42 | buf.append(iter.next()); |
169 | 42 | if(iter.hasNext()) { |
170 | 39 | buf.append(", "); |
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} |
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} |
173 | 6 | buf.append("]"); |
174 | 6 | return buf.toString(); |
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} |
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protected int getModCount() { |
182 | 433543 | return _modCount; |
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} |
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protected void incrModCount() { |
187 | 8046 | _modCount++; |
188 | 8046 | } |
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193 | 801 | private int _modCount = 0; |
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private static class ComodChecker { |
199 | 8489 | ComodChecker(RandomAccessByteList source) { |
200 | 8489 | _source = source; |
201 | 8489 | resyncModCount(); |
202 | 8489 | } |
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protected RandomAccessByteList getList() { |
205 | 758065 | return _source; |
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} |
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protected void assertNotComodified() throws ConcurrentModificationException { |
209 | 415747 | if(_expectedModCount != getList().getModCount()) { |
210 | 1 | throw new ConcurrentModificationException(); |
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} |
212 | 415746 | } |
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protected void resyncModCount() { |
215 | 17796 | _expectedModCount = getList().getModCount(); |
216 | 17796 | } |
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218 | 8489 | private RandomAccessByteList _source = null; |
219 | 8489 | private int _expectedModCount = -1; |
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} |
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protected static class RandomAccessByteListIterator extends ComodChecker implements ByteListIterator { |
223 | |
RandomAccessByteListIterator(RandomAccessByteList list, int index) { |
224 | 8322 | super(list); |
225 | 8322 | if(index < 0 || index > getList().size()) { |
226 | 9 | throw new IndexOutOfBoundsException("Index " + index + " not in [0," + getList().size() + ")"); |
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} else { |
228 | 8313 | _nextIndex = index; |
229 | 8313 | resyncModCount(); |
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} |
231 | 8313 | } |
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public boolean hasNext() { |
234 | 211295 | assertNotComodified(); |
235 | 211295 | return _nextIndex < getList().size(); |
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} |
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public boolean hasPrevious() { |
239 | 3663 | assertNotComodified(); |
240 | 3663 | return _nextIndex > 0; |
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} |
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public int nextIndex() { |
244 | 1369 | assertNotComodified(); |
245 | 1369 | return _nextIndex; |
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} |
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public int previousIndex() { |
249 | 1327 | assertNotComodified(); |
250 | 1327 | return _nextIndex - 1; |
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} |
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public byte next() { |
254 | 102709 | assertNotComodified(); |
255 | 102708 | if(!hasNext()) { |
256 | 72 | throw new NoSuchElementException(); |
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} else { |
258 | 102636 | byte val = getList().get(_nextIndex); |
259 | 102636 | _lastReturnedIndex = _nextIndex; |
260 | 102636 | _nextIndex++; |
261 | 102636 | return val; |
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} |
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} |
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public byte previous() { |
266 | 1856 | assertNotComodified(); |
267 | 1856 | if(!hasPrevious()) { |
268 | 101 | throw new NoSuchElementException(); |
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} else { |
270 | 1755 | byte val = getList().get(_nextIndex-1); |
271 | 1755 | _lastReturnedIndex = _nextIndex-1; |
272 | 1755 | _nextIndex--; |
273 | 1755 | return val; |
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} |
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} |
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public void add(byte value) { |
278 | 152 | assertNotComodified(); |
279 | 152 | getList().add(_nextIndex,value); |
280 | 152 | _nextIndex++; |
281 | 152 | _lastReturnedIndex = -1; |
282 | 152 | resyncModCount(); |
283 | 152 | } |
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public void remove() { |
286 | 333 | assertNotComodified(); |
287 | 333 | if (_lastReturnedIndex == -1) { |
288 | 26 | throw new IllegalStateException(); |
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} |
290 | 307 | if (_lastReturnedIndex == _nextIndex) { |
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292 | 3 | getList().removeElementAt(_lastReturnedIndex); |
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} else { |
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295 | 304 | getList().removeElementAt(_lastReturnedIndex); |
296 | 304 | _nextIndex--; |
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} |
298 | 307 | _lastReturnedIndex = -1; |
299 | 307 | resyncModCount(); |
300 | 307 | } |
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public void set(byte value) { |
303 | 64 | assertNotComodified(); |
304 | 64 | if(-1 == _lastReturnedIndex) { |
305 | 14 | throw new IllegalStateException(); |
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} else { |
307 | 50 | getList().set(_lastReturnedIndex,value); |
308 | 50 | resyncModCount(); |
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} |
310 | 50 | } |
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312 | 8322 | private int _nextIndex = 0; |
313 | 8322 | private int _lastReturnedIndex = -1; |
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} |
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protected static class RandomAccessByteSubList extends RandomAccessByteList implements ByteList { |
317 | 171 | RandomAccessByteSubList(RandomAccessByteList list, int fromIndex, int toIndex) { |
318 | 171 | if(fromIndex < 0 || toIndex > list.size()) { |
319 | 3 | throw new IndexOutOfBoundsException(); |
320 | 168 | } else if(fromIndex > toIndex) { |
321 | 1 | throw new IllegalArgumentException(); |
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} else { |
323 | 167 | _list = list; |
324 | 167 | _offset = fromIndex; |
325 | 167 | _limit = toIndex - fromIndex; |
326 | 167 | _comod = new ComodChecker(list); |
327 | 167 | _comod.resyncModCount(); |
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} |
329 | 167 | } |
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public byte get(int index) { |
332 | 23646 | checkRange(index); |
333 | 23637 | _comod.assertNotComodified(); |
334 | 23637 | return _list.get(toUnderlyingIndex(index)); |
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} |
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public byte removeElementAt(int index) { |
338 | 167 | checkRange(index); |
339 | 158 | _comod.assertNotComodified(); |
340 | 158 | byte val = _list.removeElementAt(toUnderlyingIndex(index)); |
341 | 158 | _limit--; |
342 | 158 | _comod.resyncModCount(); |
343 | 158 | incrModCount(); |
344 | 158 | return val; |
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} |
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public byte set(int index, byte element) { |
348 | 37 | checkRange(index); |
349 | 28 | _comod.assertNotComodified(); |
350 | 28 | byte val = _list.set(toUnderlyingIndex(index),element); |
351 | 28 | incrModCount(); |
352 | 28 | _comod.resyncModCount(); |
353 | 28 | return val; |
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} |
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public void add(int index, byte element) { |
357 | 140 | checkRangeIncludingEndpoint(index); |
358 | 132 | _comod.assertNotComodified(); |
359 | 132 | _list.add(toUnderlyingIndex(index),element); |
360 | 132 | _limit++; |
361 | 132 | _comod.resyncModCount(); |
362 | 132 | incrModCount(); |
363 | 132 | } |
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public int size() { |
366 | 69024 | _comod.assertNotComodified(); |
367 | 69024 | return _limit; |
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} |
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private void checkRange(int index) { |
371 | 23850 | if(index < 0 || index >= size()) { |
372 | 27 | throw new IndexOutOfBoundsException("index " + index + " not in [0," + size() + ")"); |
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} |
374 | 23823 | } |
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private void checkRangeIncludingEndpoint(int index) { |
377 | 140 | if(index < 0 || index > size()) { |
378 | 8 | throw new IndexOutOfBoundsException("index " + index + " not in [0," + size() + "]"); |
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} |
380 | 132 | } |
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private int toUnderlyingIndex(int index) { |
383 | 23955 | return (index + _offset); |
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} |
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386 | 171 | private int _offset = 0; |
387 | 171 | private int _limit = 0; |
388 | 171 | private RandomAccessByteList _list = null; |
389 | 171 | private ComodChecker _comod = null; |
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} |
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} |
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