/*
* Written by Doug Lea with assistance from members of JCP JSR-166
* Expert Group and released to the public domain, as explained at
* http://creativecommons.org/licenses/publicdomain
*/
package jsr166y.forkjoin;
import static jsr166y.forkjoin.Ops.*;
import java.util.*;
import java.util.concurrent.atomic.*;
import java.lang.reflect.Array;
/**
* A prefix view of ParallelLongArray that causes operations to apply
* to mappings of elements, not to the elements themselves.
* Instances of this class may be constructed only via prefix
* methods of ParallelLongArray or its other prefix classes.
*/
public abstract class ParallelLongArrayWithDoubleMapping extends AbstractParallelAnyArray.LPap {
ParallelLongArrayWithDoubleMapping
(ForkJoinExecutor ex, int origin, int fence, long[] array) {
super(ex, origin, fence, array);
}
/**
* Applies the given procedure
* @param procedure the procedure
*/
public void apply(DoubleProcedure procedure) {
ex.invoke(new PAS.FJDApply(this, origin, fence, null, procedure));
}
/**
* Returns reduction of mapped elements
* @param reducer the reducer
* @param base the result for an empty array
* @return reduction
*/
public double reduce(DoubleReducer reducer, double base) {
PAS.FJDReduce f = new PAS.FJDReduce
(this, origin, fence, null, reducer, base);
ex.invoke(f);
return f.result;
}
/**
* Returns the minimum element, or Double.MAX_VALUE if empty
* @return minimum element, or Double.MAX_VALUE if empty
*/
public double min() {
return reduce(CommonOps.naturalDoubleMinReducer(), Double.MAX_VALUE);
}
/**
* Returns the minimum element, or Double.MAX_VALUE if empty
* @param comparator the comparator
* @return minimum element, or Double.MAX_VALUE if empty
*/
public double min(DoubleComparator comparator) {
return reduce(CommonOps.doubleMinReducer(comparator), Double.MAX_VALUE);
}
/**
* Returns the maximum element, or -Double.MAX_VALUE if empty
* @return maximum element, or -Double.MAX_VALUE if empty
*/
public double max() {
return reduce(CommonOps.naturalDoubleMaxReducer(), -Double.MAX_VALUE);
}
/**
* Returns the maximum element, or -Double.MAX_VALUE if empty
* @param comparator the comparator
* @return maximum element, or -Double.MAX_VALUE if empty
*/
public double max(DoubleComparator comparator) {
return reduce(CommonOps.doubleMaxReducer(comparator), -Double.MAX_VALUE);
}
/**
* Returns the sum of elements
* @return the sum of elements
*/
public double sum() {
return reduce(CommonOps.doubleAdder(), 0);
}
/**
* Returns summary statistics
* @param comparator the comparator to use for
* locating minimum and maximum elements
* @return the summary.
*/
public ParallelDoubleArray.SummaryStatistics summary
(DoubleComparator comparator) {
PAS.FJDStats f = new PAS.FJDStats
(this, origin, fence, null, comparator);
ex.invoke(f);
return f;
}
/**
* Returns summary statistics, using natural comparator
* @return the summary.
*/
public ParallelDoubleArray.SummaryStatistics summary() {
return summary(CommonOps.naturalDoubleComparator());
}
/**
* Returns a new ParallelDoubleArray holding mappings
* @return a new ParallelDoubleArray holding mappings
*/
public ParallelDoubleArray all() {
return new ParallelDoubleArray(ex, allDoubles());
}
/**
* Returns an operation prefix that causes a method to operate
* on mapped elements of the array using the given op.
* @param op the op
* @return operation prefix
*/
public abstract ParallelLongArrayWithLongMapping withMapping
(DoubleToLong op);
/**
* Returns an operation prefix that causes a method to operate
* on mapped elements of the array using the given op.
* @param op the op
* @return operation prefix
*/
public abstract ParallelLongArrayWithDoubleMapping withMapping
(DoubleOp op);
/**
* Returns an operation prefix that causes a method to operate
* on mapped elements of the array using the given op.
* @param op the op
* @return operation prefix
*/
public abstract <U> ParallelLongArrayWithMapping<U> withMapping
(DoubleToObject<? extends U> op);
/**
* Returns an operation prefix that causes a method to operate
* on binary mappings of this array and the other array.
* @param combiner the combiner
* @param other the other array
* @return operation prefix
* @throws IllegalArgumentException if other array is a
* filtered view (all filters must precede all mappings).
*/
public <V,W,X> ParallelLongArrayWithMapping<W> withMapping
(DoubleAndObjectToObject<? super V, ? extends W> combiner,
ParallelArrayWithMapping<X,V> other) {
if (other.hasFilter()) throw new IllegalArgumentException();
return withIndexedMapping
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin));
}
/**
* Returns an operation prefix that causes a method to operate
* on binary mappings of this array and the other array.
* @param combiner the combiner
* @param other the other array
* @return operation prefix
* @throws IllegalArgumentException if other array is a
* filtered view (all filters must precede all mappings).
*/
public <V> ParallelLongArrayWithMapping<V> withMapping
(DoubleAndDoubleToObject<? extends V> combiner,
ParallelDoubleArrayWithDoubleMapping other) {
if (other.hasFilter()) throw new IllegalArgumentException();
return withIndexedMapping
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin));
}
/**
* Returns an operation prefix that causes a method to operate
* on binary mappings of this array and the other array.
* @param combiner the combiner
* @param other the other array
* @return operation prefix
* @throws IllegalArgumentException if other array is a
* filtered view (all filters must precede all mappings).
*/
public <V> ParallelLongArrayWithMapping<V> withMapping
(DoubleAndLongToObject<? extends V> combiner,
ParallelLongArrayWithLongMapping other) {
if (other.hasFilter()) throw new IllegalArgumentException();
return withIndexedMapping
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin));
}
/**
* Returns an operation prefix that causes a method to operate
* on binary mappings of this array and the other array.
* @param combiner the combiner
* @param other the other array
* @return operation prefix
* @throws IllegalArgumentException if other array is a
* filtered view (all filters must precede all mappings).
*/
public <V,W> ParallelLongArrayWithDoubleMapping withMapping
(DoubleAndObjectToDouble<? super V> combiner,
ParallelArrayWithMapping<W,V> other) {
if (other.hasFilter()) throw new IllegalArgumentException();
return withIndexedMapping
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin));
}
/**
* Returns an operation prefix that causes a method to operate
* on binary mappings of this array and the other array.
* @param combiner the combiner
* @param other the other array
* @return operation prefix
* @throws IllegalArgumentException if other array is a
* filtered view (all filters must precede all mappings).
*/
public ParallelLongArrayWithDoubleMapping withMapping
(BinaryDoubleOp combiner,
ParallelDoubleArrayWithDoubleMapping other) {
if (other.hasFilter()) throw new IllegalArgumentException();
return withIndexedMapping
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin));
}
/**
* Returns an operation prefix that causes a method to operate
* on binary mappings of this array and the other array.
* @param combiner the combiner
* @param other the other array
* @return operation prefix
* @throws IllegalArgumentException if other array is a
* filtered view (all filters must precede all mappings).
*/
public ParallelLongArrayWithDoubleMapping withMapping
(DoubleAndLongToDouble combiner,
ParallelLongArrayWithLongMapping other) {
if (other.hasFilter()) throw new IllegalArgumentException();
return withIndexedMapping
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin));
}
/**
* Returns an operation prefix that causes a method to operate
* on binary mappings of this array and the other array.
* @param combiner the combiner
* @param other the other array
* @return operation prefix
* @throws IllegalArgumentException if other array is a
* filtered view (all filters must precede all mappings).
*/
public <V,W> ParallelLongArrayWithLongMapping withMapping
(DoubleAndObjectToLong<? super V> combiner,
ParallelArrayWithMapping<W,V> other) {
if (other.hasFilter()) throw new IllegalArgumentException();
return withIndexedMapping
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin));
}
/**
* Returns an operation prefix that causes a method to operate
* on binary mappings of this array and the other array.
* @param combiner the combiner
* @param other the other array
* @return operation prefix
* @throws IllegalArgumentException if other array is a
* filtered view (all filters must precede all mappings).
*/
public ParallelLongArrayWithLongMapping withMapping
(DoubleAndDoubleToLong combiner,
ParallelDoubleArrayWithDoubleMapping other) {
if (other.hasFilter()) throw new IllegalArgumentException();
return withIndexedMapping
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin));
}
/**
* Returns an operation prefix that causes a method to operate
* on binary mappings of this array and the other array.
* @param combiner the combiner
* @param other the other array
* @return operation prefix
* @throws IllegalArgumentException if other array is a
* filtered view (all filters must precede all mappings).
*/
public ParallelLongArrayWithLongMapping withMapping
(DoubleAndLongToLong combiner,
ParallelLongArrayWithLongMapping other) {
if (other.hasFilter()) throw new IllegalArgumentException();
return withIndexedMapping
(AbstractParallelAnyArray.indexedMapper(combiner, other, origin));
}
/**
* Returns an operation prefix that causes a method to operate
* on mappings of this array using the given mapper that
* accepts as arguments an element's current index and value
* (as mapped by preceding mappings, if any), and produces a
* new value.
* @param mapper the mapper
* @return operation prefix
*/
public abstract <V> ParallelLongArrayWithMapping<V> withIndexedMapping
(IntAndDoubleToObject<? extends V> mapper);
/**
* Returns an operation prefix that causes a method to operate
* on mappings of this array using the given mapper that
* accepts as arguments an element's current index and value
* (as mapped by preceding mappings, if any), and produces a
* new value.
* @param mapper the mapper
* @return operation prefix
*/
public abstract ParallelLongArrayWithDoubleMapping withIndexedMapping
(IntAndDoubleToDouble mapper);
/**
* Returns an operation prefix that causes a method to operate
* on mappings of this array using the given mapper that
* accepts as arguments an element's current index and value
* (as mapped by preceding mappings, if any), and produces a
* new value.
* @param mapper the mapper
* @return operation prefix
*/
public abstract ParallelLongArrayWithLongMapping withIndexedMapping
(IntAndDoubleToLong mapper);
/**
* Returns an Iterable view to sequentially step through mapped
* elements also obeying bound and filter constraints, without
* performing computations to evaluate them in parallel
* @return the Iterable view
*/
public Iterable<Double> sequentially() {
return new SequentiallyAsDouble();
}
}