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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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|
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package extra166y; |
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|
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import jsr166y.*; |
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import static extra166y.Ops.*; |
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import java.util.*; |
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import java.util.concurrent.atomic.*; |
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import java.lang.reflect.Array; |
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|
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/** |
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* A prefix view of ParallelArray that causes operations to apply |
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* to mappings of elements, not to the elements themselves. |
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* Instances of this class may be constructed only via prefix |
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* methods of ParallelArray or its other prefix classes. |
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*/ |
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public abstract class ParallelArrayWithLongMapping<T> extends AbstractParallelAnyArray.OPap<T> { |
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ParallelArrayWithLongMapping |
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(ForkJoinPool ex, int origin, int fence, T[] array) { |
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super(ex, origin, fence, array); |
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} |
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|
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/** |
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* Applies the given procedure. |
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* @param procedure the procedure |
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*/ |
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public void apply(LongProcedure procedure) { |
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ex.invoke(new PAS.FJLApply(this, origin, fence, null, procedure)); |
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} |
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|
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/** |
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* Returns reduction of mapped elements. |
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* @param reducer the reducer |
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* @param base the result for an empty array |
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* @return reduction |
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*/ |
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public long reduce(LongReducer reducer, long base) { |
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PAS.FJLReduce f = new PAS.FJLReduce |
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(this, origin, fence, null, reducer, base); |
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ex.invoke(f); |
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return f.result; |
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} |
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|
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/** |
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* Returns the minimum element, or Long.MAX_VALUE if empty. |
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* @return minimum element, or Long.MAX_VALUE if empty |
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*/ |
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public long min() { |
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return reduce(CommonOps.naturalLongMinReducer(), Long.MAX_VALUE); |
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} |
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|
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/** |
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* Returns the minimum element, or Long.MAX_VALUE if empty. |
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* @param comparator the comparator |
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* @return minimum element, or Long.MAX_VALUE if empty |
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*/ |
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public long min(LongComparator comparator) { |
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return reduce(CommonOps.longMinReducer(comparator), Long.MAX_VALUE); |
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} |
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|
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/** |
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* Returns the maximum element, or Long.MIN_VALUE if empty. |
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* @return maximum element, or Long.MIN_VALUE if empty |
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*/ |
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public long max() { |
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return reduce(CommonOps.naturalLongMaxReducer(), Long.MIN_VALUE); |
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} |
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|
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/** |
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* Returns the maximum element, or Long.MIN_VALUE if empty. |
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* @param comparator the comparator |
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* @return maximum element, or Long.MIN_VALUE if empty |
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*/ |
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public long max(LongComparator comparator) { |
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return reduce(CommonOps.longMaxReducer(comparator), Long.MIN_VALUE); |
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} |
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|
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/** |
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* Returns the sum of elements. |
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* @return the sum of elements |
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*/ |
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public long sum() { |
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return reduce(CommonOps.longAdder(), 0L); |
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} |
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|
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/** |
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* Returns summary statistics. |
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* @param comparator the comparator to use for |
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* locating minimum and maximum elements |
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* @return the summary |
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*/ |
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public ParallelLongArray.SummaryStatistics summary |
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(LongComparator comparator) { |
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PAS.FJLStats f = new PAS.FJLStats |
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(this, origin, fence, null, comparator); |
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ex.invoke(f); |
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return f; |
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} |
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|
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/** |
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* Returns summary statistics, using natural comparator. |
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* @return the summary |
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*/ |
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public ParallelLongArray.SummaryStatistics summary() { |
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return summary(CommonOps.naturalLongComparator()); |
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} |
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|
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/** |
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* Returns a new ParallelLongArray holding mappings. |
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* @return a new ParallelLongArray holding mappings |
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*/ |
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public ParallelLongArray all() { |
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return new ParallelLongArray(ex, allLongs()); |
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} |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on mapped elements of the array using the given op. |
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* @param op the op |
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* @return operation prefix |
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*/ |
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public abstract ParallelArrayWithDoubleMapping<T> withMapping(LongToDouble op); |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on mapped elements of the array using the given op. |
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* @param op the op |
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* @return operation prefix |
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*/ |
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public abstract ParallelArrayWithLongMapping<T> withMapping(LongOp op); |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on mapped elements of the array using the given op. |
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* @param op the op |
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* @return operation prefix |
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*/ |
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public abstract <U> ParallelArrayWithMapping<T,U> withMapping |
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(LongToObject<? extends U> op); |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on binary mappings of this array and the other array. |
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* @param combiner the combiner |
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* @param other the other array |
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* @return operation prefix |
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* @throws IllegalArgumentException if other array is a |
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* filtered view (all filters must precede all mappings) |
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*/ |
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public <V,W,X> ParallelArrayWithMapping<T,W> withMapping |
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(LongAndObjectToObject<? super V, ? extends W> combiner, |
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ParallelArrayWithMapping<X,V> other) { |
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if (other.hasFilter()) throw new IllegalArgumentException(); |
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return withIndexedMapping |
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(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
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} |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on binary mappings of this array and the other array. |
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* @param combiner the combiner |
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* @param other the other array |
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* @return operation prefix |
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* @throws IllegalArgumentException if other array is a |
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* filtered view (all filters must precede all mappings) |
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*/ |
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public <V> ParallelArrayWithMapping<T,V> withMapping |
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(LongAndDoubleToObject<? extends V> combiner, |
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ParallelDoubleArrayWithDoubleMapping other) { |
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if (other.hasFilter()) throw new IllegalArgumentException(); |
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return withIndexedMapping |
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(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
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} |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on binary mappings of this array and the other array. |
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* @param combiner the combiner |
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* @param other the other array |
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* @return operation prefix |
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* @throws IllegalArgumentException if other array is a |
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* filtered view (all filters must precede all mappings) |
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*/ |
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public <V> ParallelArrayWithMapping<T,V> withMapping |
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(LongAndLongToObject<? extends V> combiner, |
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ParallelLongArrayWithLongMapping other) { |
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if (other.hasFilter()) throw new IllegalArgumentException(); |
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return withIndexedMapping |
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(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
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} |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on binary mappings of this array and the other array. |
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* @param combiner the combiner |
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* @param other the other array |
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* @return operation prefix |
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* @throws IllegalArgumentException if other array is a |
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* filtered view (all filters must precede all mappings) |
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*/ |
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public <V,W> ParallelArrayWithDoubleMapping<T> withMapping |
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(LongAndObjectToDouble<? super V> combiner, |
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ParallelArrayWithMapping<W,V> other) { |
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if (other.hasFilter()) throw new IllegalArgumentException(); |
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return withIndexedMapping |
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(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
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} |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on binary mappings of this array and the other array. |
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* @param combiner the combiner |
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* @param other the other array |
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* @return operation prefix |
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* @throws IllegalArgumentException if other array is a |
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* filtered view (all filters must precede all mappings) |
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*/ |
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public ParallelArrayWithDoubleMapping<T> withMapping |
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(LongAndDoubleToDouble combiner, |
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ParallelDoubleArrayWithDoubleMapping other) { |
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if (other.hasFilter()) throw new IllegalArgumentException(); |
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return withIndexedMapping |
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(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
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} |
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|
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on binary mappings of this array and the other array. |
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* @param combiner the combiner |
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* @param other the other array |
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* @return operation prefix |
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* @throws IllegalArgumentException if other array is a |
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* filtered view (all filters must precede all mappings) |
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*/ |
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public ParallelArrayWithDoubleMapping<T> withMapping |
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(LongAndLongToDouble combiner, |
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ParallelLongArrayWithLongMapping other) { |
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if (other.hasFilter()) throw new IllegalArgumentException(); |
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return withIndexedMapping |
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(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
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} |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on binary mappings of this array and the other array. |
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* @param combiner the combiner |
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* @param other the other array |
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* @return operation prefix |
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* @throws IllegalArgumentException if other array is a |
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* filtered view (all filters must precede all mappings) |
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*/ |
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public <V,W> ParallelArrayWithLongMapping<T> withMapping |
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(LongAndObjectToLong<? super V> combiner, |
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ParallelArrayWithMapping<W,V> other) { |
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if (other.hasFilter()) throw new IllegalArgumentException(); |
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return withIndexedMapping |
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(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
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} |
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|
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on binary mappings of this array and the other array. |
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* @param combiner the combiner |
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* @param other the other array |
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* @return operation prefix |
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* @throws IllegalArgumentException if other array is a |
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* filtered view (all filters must precede all mappings) |
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*/ |
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public ParallelArrayWithLongMapping<T> withMapping |
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(LongAndDoubleToLong combiner, |
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ParallelDoubleArrayWithDoubleMapping other) { |
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if (other.hasFilter()) throw new IllegalArgumentException(); |
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return withIndexedMapping |
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(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
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} |
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|
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on binary mappings of this array and the other array. |
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* @param combiner the combiner |
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* @param other the other array |
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* @return operation prefix |
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* @throws IllegalArgumentException if other array is a |
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* filtered view (all filters must precede all mappings) |
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*/ |
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public ParallelArrayWithLongMapping<T> withMapping |
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(BinaryLongOp combiner, |
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ParallelLongArrayWithLongMapping other) { |
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if (other.hasFilter()) throw new IllegalArgumentException(); |
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return withIndexedMapping |
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(AbstractParallelAnyArray.indexedMapper(combiner, other, origin)); |
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} |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on mappings of this array using the given mapper that |
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* accepts as arguments an element's current index and value |
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* (as mapped by preceding mappings, if any), and produces a |
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* new value. |
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* @param mapper the mapper |
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* @return operation prefix |
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*/ |
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public abstract <V> ParallelArrayWithMapping<T,V> withIndexedMapping |
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(IntAndLongToObject<? extends V> mapper); |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on mappings of this array using the given mapper that |
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* accepts as arguments an element's current index and value |
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* (as mapped by preceding mappings, if any), and produces a |
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* new value. |
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* @param mapper the mapper |
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* @return operation prefix |
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*/ |
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public abstract ParallelArrayWithDoubleMapping<T> withIndexedMapping |
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(IntAndLongToDouble mapper); |
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|
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/** |
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* Returns an operation prefix that causes a method to operate |
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* on mappings of this array using the given mapper that |
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* accepts as arguments an element's current index and value |
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* (as mapped by preceding mappings, if any), and produces a |
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* new value. |
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* @param mapper the mapper |
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* @return operation prefix |
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*/ |
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public abstract ParallelArrayWithLongMapping<T> withIndexedMapping |
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(IntAndLongToLong mapper); |
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|
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/** |
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* Returns an Iterable view to sequentially step through mapped |
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* elements also obeying bound and filter constraints, without |
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* performing computations to evaluate them in parallel. |
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* @return the Iterable view |
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*/ |
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public Iterable<Long> sequentially() { |
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return new SequentiallyAsLong(); |
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} |
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} |