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dl |
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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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jsr166 |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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dl |
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*/ |
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package extra166y; |
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jsr166 |
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dl |
1.1 |
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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/** |
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* A prefix view of ParallelDoubleArray that causes operations to apply |
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* only to elements for which a selector returns true. |
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* Instances of this class may be constructed only via prefix |
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* methods of ParallelDoubleArray or its other prefix classes. |
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*/ |
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public abstract class ParallelDoubleArrayWithFilter extends ParallelDoubleArrayWithDoubleMapping { |
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ParallelDoubleArrayWithFilter |
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(ForkJoinPool ex, int origin, int fence, double[] array) { |
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super(ex, origin, fence, array); |
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} |
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/** |
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* Replaces elements with the results of applying the given |
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* op to their current values. |
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* @param op the op |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelDoubleArrayWithFilter replaceWithMapping(DoubleOp op) { |
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ex.invoke(new PAS.FJDTransform(this, origin, |
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fence, null, op)); |
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return this; |
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} |
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/** |
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* Replaces elements with the results of applying the given |
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jsr166 |
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* op to their indices. |
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* @param op the op |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelDoubleArrayWithFilter replaceWithMappedIndex(IntToDouble op) { |
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ex.invoke(new PAS.FJDIndexMap(this, origin, fence, |
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null, op)); |
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return this; |
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} |
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/** |
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* Replaces elements with the results of applying the given |
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jsr166 |
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* mapping to each index and current element value. |
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* @param op the op |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelDoubleArrayWithFilter replaceWithMappedIndex(IntAndDoubleToDouble op) { |
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ex.invoke(new PAS.FJDBinaryIndexMap |
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(this, origin, fence, null, op)); |
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return this; |
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} |
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/** |
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* Replaces elements with results of applying the given generator. |
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* @param generator the generator |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelDoubleArrayWithFilter replaceWithGeneratedValue(DoubleGenerator generator) { |
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ex.invoke(new PAS.FJDGenerate |
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(this, origin, fence, null, generator)); |
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return this; |
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} |
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/** |
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* Replaces elements with the given value. |
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* @param value the value |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelDoubleArrayWithFilter replaceWithValue(double value) { |
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ex.invoke(new PAS.FJDFill(this, origin, fence, |
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null, value)); |
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return this; |
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} |
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/** |
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* Replaces elements with results of applying |
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* {@code op(thisElement, otherElement)}. |
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* @param other the other array |
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* @param combiner the combiner |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelDoubleArrayWithFilter replaceWithMapping(BinaryDoubleOp combiner, |
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ParallelDoubleArrayWithDoubleMapping other) { |
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ex.invoke(new PAS.FJDPACombineInPlace |
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(this, origin, fence, null, |
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other, other.origin - origin, combiner)); |
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return this; |
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} |
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/** |
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* Replaces elements with results of applying |
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* {@code op(thisElement, otherElement)}. |
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* @param other the other array |
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* @param combiner the combiner |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelDoubleArrayWithFilter replaceWithMapping |
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(BinaryDoubleOp combiner, |
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double[] other) { |
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ex.invoke(new PAS.FJDCombineInPlace |
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(this, origin, fence, null, other, |
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-origin, combiner)); |
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return this; |
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} |
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/** |
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* Returns a new ParallelDoubleArray containing only unique |
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* elements (that is, without any duplicates). |
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* @return the new ParallelDoubleArray |
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*/ |
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public ParallelDoubleArray allUniqueElements() { |
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PAS.UniquifierTable tab = new PAS.UniquifierTable |
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(fence - origin, this, false); |
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PAS.FJDUniquifier f = new PAS.FJDUniquifier |
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(this, origin, fence, null, tab); |
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ex.invoke(f); |
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double[] res = tab.uniqueDoubles(f.count); |
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return new ParallelDoubleArray(ex, res); |
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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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* only on elements for which the current selector (if |
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jsr166 |
1.5 |
* present) and the given selector returns true. |
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* @param selector the selector |
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* @return operation prefix |
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*/ |
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public abstract ParallelDoubleArrayWithFilter withFilter |
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(DoublePredicate selector); |
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/** |
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* Returns an operation prefix that causes a method to operate |
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* only on elements for which the current selector (if |
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jsr166 |
1.5 |
* present) and the given binary selector returns true. |
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* @param selector the selector |
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* @return operation prefix |
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*/ |
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public ParallelDoubleArrayWithFilter withFilter |
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(BinaryDoublePredicate selector, |
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ParallelDoubleArrayWithDoubleMapping other) { |
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return withIndexedFilter(AbstractParallelAnyArray.indexedSelector(selector, other, origin)); |
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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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* only on elements for which the current selector (if |
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jsr166 |
1.5 |
* present) and the given indexed selector returns true. |
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dl |
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* @param selector the selector |
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* @return operation prefix |
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*/ |
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public abstract ParallelDoubleArrayWithFilter withIndexedFilter |
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(IntAndDoublePredicate selector); |
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/** |
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* Returns true if all elements at the same relative positions |
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* of this and other array are equal. |
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* @param other the other array |
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* @return true if equal |
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*/ |
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public boolean hasAllEqualElements |
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(ParallelDoubleArrayWithDoubleMapping other) { |
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return withFilter(CommonOps.doubleInequalityPredicate(), |
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other).anyIndex() < 0; |
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} |
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final void leafTransfer(int lo, int hi, double[] dest, int offset) { |
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final double[] a = this.array; |
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for (int i = lo; i < hi; ++i) |
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dest[offset++] = (a[i]); |
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} |
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final void leafTransferByIndex(int[] indices, int loIdx, int hiIdx, |
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double[] dest, int offset) { |
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final double[] a = this.array; |
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for (int i = loIdx; i < hiIdx; ++i) |
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dest[offset++] = (a[indices[i]]); |
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} |
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final double dget(int i) { return this.array[i]; } |
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} |