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 extra166y; |
8 |
import jsr166y.*; |
9 |
import static extra166y.Ops.*; |
10 |
import java.util.*; |
11 |
import java.util.concurrent.atomic.*; |
12 |
import java.lang.reflect.Array; |
13 |
|
14 |
/** |
15 |
* A prefix view of ParallelDoubleArray that causes operations to apply |
16 |
* to mappings of elements, not to the elements themselves. |
17 |
* Instances of this class may be constructed only via prefix |
18 |
* methods of ParallelDoubleArray or its other prefix classes. |
19 |
*/ |
20 |
public abstract class ParallelDoubleArrayWithMapping<U> extends AbstractParallelAnyArray.DPap { |
21 |
ParallelDoubleArrayWithMapping |
22 |
(ForkJoinPool ex, int origin, int fence, double[] array) { |
23 |
super(ex, origin, fence, array); |
24 |
} |
25 |
|
26 |
/** |
27 |
* Applies the given procedure to mapped elements |
28 |
* @param procedure the procedure |
29 |
*/ |
30 |
public void apply(Procedure<? super U> procedure) { |
31 |
ex.invoke(new PAS.FJOApply(this, origin, fence, null, procedure)); |
32 |
} |
33 |
|
34 |
/** |
35 |
* Returns reduction of mapped elements |
36 |
* @param reducer the reducer |
37 |
* @param base the result for an empty array |
38 |
* @return reduction |
39 |
*/ |
40 |
public U reduce(Reducer<U> reducer, U base) { |
41 |
PAS.FJOReduce f = new PAS.FJOReduce |
42 |
(this, origin, fence, null, reducer, base); |
43 |
ex.invoke(f); |
44 |
return (U)(f.result); |
45 |
} |
46 |
|
47 |
/** |
48 |
* Returns mapping of some element matching bound and filter |
49 |
* constraints, or null if none. |
50 |
* @return mapping of matching element, or null if none. |
51 |
*/ |
52 |
public U any() { |
53 |
int i = anyIndex(); |
54 |
return (i < 0) ? null : (U)oget(i); |
55 |
} |
56 |
|
57 |
/** |
58 |
* Returns the minimum mapped element, or null if empty |
59 |
* @param comparator the comparator |
60 |
* @return minimum mapped element, or null if empty |
61 |
*/ |
62 |
public U min(Comparator<? super U> comparator) { |
63 |
return reduce(CommonOps.<U>minReducer(comparator), null); |
64 |
} |
65 |
|
66 |
/** |
67 |
* Returns the minimum mapped element, or null if empty, |
68 |
* assuming that all elements are Comparables |
69 |
* @return minimum mapped element, or null if empty |
70 |
* @throws ClassCastException if any element is not Comparable. |
71 |
*/ |
72 |
public U min() { |
73 |
return reduce((Reducer<U>)(CommonOps.castedMinReducer()), null); |
74 |
} |
75 |
|
76 |
/** |
77 |
* Returns the maximum mapped element, or null if empty |
78 |
* @param comparator the comparator |
79 |
* @return maximum mapped element, or null if empty |
80 |
*/ |
81 |
public U max(Comparator<? super U> comparator) { |
82 |
return reduce(CommonOps.<U>maxReducer(comparator), null); |
83 |
} |
84 |
|
85 |
/** |
86 |
* Returns the maximum mapped element, or null if empty |
87 |
* assuming that all elements are Comparables |
88 |
* @return maximum mapped element, or null if empty |
89 |
* @throws ClassCastException if any element is not Comparable. |
90 |
*/ |
91 |
public U max() { |
92 |
return reduce((Reducer<U>)(CommonOps.castedMaxReducer()), null); |
93 |
} |
94 |
|
95 |
/** |
96 |
* Returns summary statistics, using the given comparator |
97 |
* to locate minimum and maximum elements. |
98 |
* @param comparator the comparator to use for |
99 |
* locating minimum and maximum elements |
100 |
* @return the summary. |
101 |
*/ |
102 |
public ParallelArray.SummaryStatistics<U> summary |
103 |
(Comparator<? super U> comparator) { |
104 |
PAS.FJOStats f = new PAS.FJOStats |
105 |
(this, origin, fence, null, comparator); |
106 |
ex.invoke(f); |
107 |
return (ParallelArray.SummaryStatistics<U>)f; |
108 |
} |
109 |
|
110 |
/** |
111 |
* Returns summary statistics, assuming that all elements are |
112 |
* Comparables |
113 |
* @return the summary. |
114 |
*/ |
115 |
public ParallelArray.SummaryStatistics<U> summary() { |
116 |
return summary((Comparator<? super U>)(CommonOps.castedComparator())); |
117 |
} |
118 |
|
119 |
/** |
120 |
* Returns a new ParallelArray holding elements |
121 |
* @return a new ParallelArray holding elements |
122 |
*/ |
123 |
public ParallelArray<U> all() { |
124 |
return new ParallelArray<U>(ex, (U[])allObjects(null)); |
125 |
} |
126 |
|
127 |
/** |
128 |
* Returns a new ParallelArray with the given element type holding |
129 |
* elements |
130 |
* @param elementType the type of the elements |
131 |
* @return a new ParallelArray holding elements |
132 |
*/ |
133 |
public ParallelArray<U> all(Class<? super U> elementType) { |
134 |
return new ParallelArray<U>(ex, (U[])allObjects(elementType)); |
135 |
} |
136 |
|
137 |
/** |
138 |
* Returns an operation prefix that causes a method to operate |
139 |
* on mapped elements of the array using the given op |
140 |
* applied to current op's results |
141 |
* @param op the op |
142 |
* @return operation prefix |
143 |
*/ |
144 |
public abstract <V> ParallelDoubleArrayWithMapping<V> withMapping |
145 |
(Op<? super U, ? extends V> op); |
146 |
|
147 |
/** |
148 |
* Returns an operation prefix that causes a method to operate |
149 |
* on mapped elements of the array using the given op |
150 |
* applied to current op's results |
151 |
* @param op the op |
152 |
* @return operation prefix |
153 |
*/ |
154 |
public abstract ParallelDoubleArrayWithDoubleMapping withMapping |
155 |
(ObjectToDouble<? super U> op); |
156 |
|
157 |
/** |
158 |
* Returns an operation prefix that causes a method to operate |
159 |
* on mapped elements of the array using the given op |
160 |
* applied to current op's results |
161 |
* @param op the op |
162 |
* @return operation prefix |
163 |
*/ |
164 |
public abstract ParallelDoubleArrayWithLongMapping withMapping |
165 |
(ObjectToLong<? super U> op); |
166 |
|
167 |
/** |
168 |
* Returns an operation prefix that causes a method to operate |
169 |
* on binary mappings of this array and the other array. |
170 |
* @param combiner the combiner |
171 |
* @param other the other array |
172 |
* @return operation prefix |
173 |
* @throws IllegalArgumentException if other array is a |
174 |
* filtered view (all filters must precede all mappings). |
175 |
*/ |
176 |
public <V,W,X> ParallelDoubleArrayWithMapping<W> withMapping |
177 |
(BinaryOp<? super U, ? super V, ? extends W> combiner, |
178 |
ParallelArrayWithMapping<X,V> other) { |
179 |
if (other.hasFilter()) throw new IllegalArgumentException(); |
180 |
return withIndexedMapping |
181 |
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
182 |
} |
183 |
|
184 |
/** |
185 |
* Returns an operation prefix that causes a method to operate |
186 |
* on binary mappings of this array and the other array. |
187 |
* @param combiner the combiner |
188 |
* @param other the other array |
189 |
* @return operation prefix |
190 |
* @throws IllegalArgumentException if other array is a |
191 |
* filtered view (all filters must precede all mappings). |
192 |
*/ |
193 |
public <V> ParallelDoubleArrayWithMapping<V> withMapping |
194 |
(ObjectAndDoubleToObject<? super U, ? extends V> combiner, |
195 |
ParallelDoubleArrayWithDoubleMapping other) { |
196 |
if (other.hasFilter()) throw new IllegalArgumentException(); |
197 |
return withIndexedMapping |
198 |
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
199 |
} |
200 |
|
201 |
/** |
202 |
* Returns an operation prefix that causes a method to operate |
203 |
* on binary mappings of this array and the other array. |
204 |
* @param combiner the combiner |
205 |
* @param other the other array |
206 |
* @return operation prefix |
207 |
* @throws IllegalArgumentException if other array is a |
208 |
* filtered view (all filters must precede all mappings). |
209 |
*/ |
210 |
public <V> ParallelDoubleArrayWithMapping<V> withMapping |
211 |
(ObjectAndLongToObject<? super U, ? extends V> combiner, |
212 |
ParallelLongArrayWithLongMapping other) { |
213 |
if (other.hasFilter()) throw new IllegalArgumentException(); |
214 |
return withIndexedMapping |
215 |
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
216 |
} |
217 |
|
218 |
|
219 |
/** |
220 |
* Returns an operation prefix that causes a method to operate |
221 |
* on binary mappings of this array and the other array. |
222 |
* @param combiner the combiner |
223 |
* @param other the other array |
224 |
* @return operation prefix |
225 |
* @throws IllegalArgumentException if other array is a |
226 |
* filtered view (all filters must precede all mappings). |
227 |
*/ |
228 |
public <V,W> ParallelDoubleArrayWithDoubleMapping withMapping |
229 |
(ObjectAndObjectToDouble<? super U, ? super V> combiner, |
230 |
ParallelArrayWithMapping<W,V> other) { |
231 |
if (other.hasFilter()) throw new IllegalArgumentException(); |
232 |
return withIndexedMapping |
233 |
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
234 |
} |
235 |
|
236 |
/** |
237 |
* Returns an operation prefix that causes a method to operate |
238 |
* on binary mappings of this array and the other array. |
239 |
* @param combiner the combiner |
240 |
* @param other the other array |
241 |
* @return operation prefix |
242 |
* @throws IllegalArgumentException if other array is a |
243 |
* filtered view (all filters must precede all mappings). |
244 |
*/ |
245 |
public ParallelDoubleArrayWithDoubleMapping withMapping |
246 |
(ObjectAndDoubleToDouble<? super U> combiner, |
247 |
ParallelDoubleArrayWithDoubleMapping other) { |
248 |
if (other.hasFilter()) throw new IllegalArgumentException(); |
249 |
return withIndexedMapping |
250 |
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
251 |
} |
252 |
|
253 |
/** |
254 |
* Returns an operation prefix that causes a method to operate |
255 |
* on binary mappings of this array and the other array. |
256 |
* @param combiner the combiner |
257 |
* @param other the other array |
258 |
* @return operation prefix |
259 |
*/ |
260 |
public ParallelDoubleArrayWithDoubleMapping withMapping |
261 |
(ObjectAndLongToDouble<? super U> combiner, |
262 |
ParallelLongArrayWithLongMapping other) { |
263 |
if (other.hasFilter()) throw new IllegalArgumentException(); |
264 |
return withIndexedMapping |
265 |
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
266 |
} |
267 |
|
268 |
/** |
269 |
* Returns an operation prefix that causes a method to operate |
270 |
* on binary mappings of this array and the other array. |
271 |
* @param combiner the combiner |
272 |
* @param other the other array |
273 |
* @return operation prefix |
274 |
* @throws IllegalArgumentException if other array is a |
275 |
* filtered view (all filters must precede all mappings). |
276 |
*/ |
277 |
public <V,W> ParallelDoubleArrayWithLongMapping withMapping |
278 |
(ObjectAndObjectToLong<? super U, ? super V> combiner, |
279 |
ParallelArrayWithMapping<W,V> other) { |
280 |
if (other.hasFilter()) throw new IllegalArgumentException(); |
281 |
return withIndexedMapping |
282 |
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
283 |
} |
284 |
|
285 |
/** |
286 |
* Returns an operation prefix that causes a method to operate |
287 |
* on binary mappings of this array and the other array. |
288 |
* @param combiner the combiner |
289 |
* @param other the other array |
290 |
* @return operation prefix |
291 |
* @throws IllegalArgumentException if other array is a |
292 |
* filtered view (all filters must precede all mappings). |
293 |
*/ |
294 |
public ParallelDoubleArrayWithLongMapping withMapping |
295 |
(ObjectAndDoubleToLong<? super U> combiner, |
296 |
ParallelDoubleArrayWithDoubleMapping other) { |
297 |
if (other.hasFilter()) throw new IllegalArgumentException(); |
298 |
return withIndexedMapping |
299 |
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
300 |
} |
301 |
|
302 |
/** |
303 |
* Returns an operation prefix that causes a method to operate |
304 |
* on binary mappings of this array and the other array. |
305 |
* @param combiner the combiner |
306 |
* @param other the other array |
307 |
* @return operation prefix |
308 |
* @throws IllegalArgumentException if other array is a |
309 |
* filtered view (all filters must precede all mappings). |
310 |
*/ |
311 |
public ParallelDoubleArrayWithLongMapping withMapping |
312 |
(ObjectAndLongToLong<? super U> combiner, |
313 |
ParallelLongArrayWithLongMapping other) { |
314 |
if (other.hasFilter()) throw new IllegalArgumentException(); |
315 |
return withIndexedMapping |
316 |
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
317 |
} |
318 |
|
319 |
/** |
320 |
* Returns an operation prefix that causes a method to operate |
321 |
* on mappings of this array using the given mapper that |
322 |
* accepts as arguments an element's current index and value |
323 |
* (as mapped by preceding mappings, if any), and produces a |
324 |
* new value. |
325 |
* @param mapper the mapper |
326 |
* @return operation prefix |
327 |
*/ |
328 |
public abstract <V> ParallelDoubleArrayWithMapping<V> withIndexedMapping |
329 |
(IntAndObjectToObject<? super U, ? extends V> mapper); |
330 |
|
331 |
/** |
332 |
* Returns an operation prefix that causes a method to operate |
333 |
* on mappings of this array using the given mapper that |
334 |
* accepts as arguments an element's current index and value |
335 |
* (as mapped by preceding mappings, if any), and produces a |
336 |
* new value. |
337 |
* @param mapper the mapper |
338 |
* @return operation prefix |
339 |
*/ |
340 |
public abstract ParallelDoubleArrayWithDoubleMapping withIndexedMapping |
341 |
(IntAndObjectToDouble<? super U> mapper); |
342 |
|
343 |
/** |
344 |
* Returns an operation prefix that causes a method to operate |
345 |
* on mappings of this array using the given mapper that |
346 |
* accepts as arguments an element's current index and value |
347 |
* (as mapped by preceding mappings, if any), and produces a |
348 |
* new value. |
349 |
* @param mapper the mapper |
350 |
* @return operation prefix |
351 |
*/ |
352 |
public abstract ParallelDoubleArrayWithLongMapping withIndexedMapping |
353 |
(IntAndObjectToLong<? super U> mapper); |
354 |
|
355 |
/** |
356 |
* Returns an Iterable view to sequentially step through mapped |
357 |
* elements also obeying bound and filter constraints, without |
358 |
* performing computations to evaluate them in parallel |
359 |
* @return the Iterable view |
360 |
*/ |
361 |
public Iterable<U> sequentially() { |
362 |
return new Sequentially<U>(); |
363 |
} |
364 |
|
365 |
} |
366 |
|