/*
 * Copyright (c) 2020 Goldman Sachs and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompany this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */

package org.eclipse.collections.api;

import java.util.Collection;
import java.util.NoSuchElementException;
import java.util.DoubleSummaryStatistics;

import org.eclipse.collections.api.bag.primitive.MutableDoubleBag;
import org.eclipse.collections.api.block.function.primitive.DoubleDoubleToDoubleFunction;
import org.eclipse.collections.api.block.function.primitive.DoubleToBooleanFunction;
import org.eclipse.collections.api.block.function.primitive.DoubleToByteFunction;
import org.eclipse.collections.api.block.function.primitive.DoubleToShortFunction;
import org.eclipse.collections.api.block.function.primitive.DoubleToCharFunction;
import org.eclipse.collections.api.block.function.primitive.DoubleToDoubleFunction;
import org.eclipse.collections.api.block.function.primitive.DoubleToFloatFunction;
import org.eclipse.collections.api.block.function.primitive.DoubleToIntFunction;
import org.eclipse.collections.api.block.function.primitive.DoubleToLongFunction;
import org.eclipse.collections.api.block.function.primitive.ObjectDoubleToObjectFunction;
import org.eclipse.collections.api.block.function.primitive.DoubleToObjectFunction;
import org.eclipse.collections.api.block.predicate.primitive.DoublePredicate;
import org.eclipse.collections.api.block.procedure.primitive.DoubleProcedure;
import org.eclipse.collections.api.collection.primitive.MutableBooleanCollection;
import org.eclipse.collections.api.collection.primitive.MutableByteCollection;
import org.eclipse.collections.api.collection.primitive.MutableCharCollection;
import org.eclipse.collections.api.collection.primitive.MutableDoubleCollection;
import org.eclipse.collections.api.collection.primitive.MutableFloatCollection;
import org.eclipse.collections.api.collection.primitive.MutableIntCollection;
import org.eclipse.collections.api.collection.primitive.MutableLongCollection;
import org.eclipse.collections.api.collection.primitive.MutableShortCollection;
import org.eclipse.collections.api.iterator.DoubleIterator;
import org.eclipse.collections.api.list.primitive.MutableDoubleList;
import org.eclipse.collections.api.set.primitive.MutableDoubleSet;

DoubleIterable is an interface which is memory-optimized for double primitives.
It is inspired by the interface RichIterable, and contains a subset of the internal iterator methods on RichIterable like collect, sum, etc.
The API also includes an external iterator method, which returns an DoubleIterator. DoubleIterator helps iterate over the DoubleIterable without boxing the primitives.
This file was automatically generated from template file primitiveIterable.stg.
/**
 * DoubleIterable is an interface which is memory-optimized for double primitives.
 * It is inspired by the interface RichIterable, and contains a subset of the internal iterator methods on RichIterable like collect, sum, etc.
 * The API also includes an external iterator method, which returns an DoubleIterator. DoubleIterator helps iterate over the DoubleIterable without boxing the primitives.
 * This file was automatically generated from template file primitiveIterable.stg.
 */
public interface DoubleIterable extends PrimitiveIterable
{
    
Returns a primitive iterator that can be used to iterate over the DoubleIterable in an
imperative style.
/**
     * Returns a primitive iterator that can be used to iterate over the DoubleIterable in an
     * imperative style.
     */
    DoubleIterator doubleIterator();

    
Converts the DoubleIterable to a primitive double array.
/**
     * Converts the DoubleIterable to a primitive double array.
     */
    double[] toArray();

    
Converts the DoubleIterable to a primitive double array. If the collection fits into the provided array it is used
to store its elements and is returned from the method, otherwise a new array of the appropriate size is allocated
and returned. If the iterable is empty, the target array is returned unchanged.
/**
     * Converts the DoubleIterable to a primitive double array. If the collection fits into the provided array it is used
     * to store its elements and is returned from the method, otherwise a new array of the appropriate size is allocated
     * and returned. If the iterable is empty, the target array is returned unchanged.
     */
    default double[] toArray(double[] target)
    {
        return this.toList().toArray(target);
    }

    
Returns true if the value is contained in the DoubleIterable, and false if it is not.
/**
     * Returns true if the value is contained in the DoubleIterable, and false if it is not.
     */
    boolean contains(double value);

    
Returns true if the all of the values specified in the source array are contained
in the DoubleIterable, and false if they are not.
/**
     * Returns true if the all of the values specified in the source array are contained
     * in the DoubleIterable, and false if they are not.
     */
    boolean containsAll(double... source);

    
Returns true if the all of the values specified in the source DoubleIterable are contained
in the DoubleIterable, and false if they are not.
/**
     * Returns true if the all of the values specified in the source DoubleIterable are contained
     * in the DoubleIterable, and false if they are not.
     */
    boolean containsAll(DoubleIterable source);

    
Applies the DoubleProcedure to each element in the DoubleIterable.
/**
     * Applies the DoubleProcedure to each element in the DoubleIterable.
     */
    void forEach(DoubleProcedure procedure);

    
A synonym for forEach.
Since:
7.0./**
     * A synonym for forEach.
     *
     * @since 7.0.
     */
    void each(DoubleProcedure procedure);

    
Since:
9.0./**
     * @since 9.0.
     */
    default DoubleIterable tap(DoubleProcedure procedure)
    {
        this.forEach(procedure);
        return this;
    }

    
Returns a new DoubleIterable with all of the elements in the DoubleIterable that
return true for the specified predicate.
/**
     * Returns a new DoubleIterable with all of the elements in the DoubleIterable that
     * return true for the specified predicate.
     */
    DoubleIterable select(DoublePredicate predicate);

    
Returns a new DoubleIterable with all of the elements in the DoubleIterable that
return false for the specified predicate.
/**
     * Returns a new DoubleIterable with all of the elements in the DoubleIterable that
     * return false for the specified predicate.
     */
    DoubleIterable reject(DoublePredicate predicate);

    
Same as select(DoublePredicate) , only the results are added to the target MutableDoubleCollection. 
Since:
8.1./**
     * Same as {@link #select(DoublePredicate)} , only the results are added to the target MutableDoubleCollection.
     *
     * @since 8.1.
     */
    default <R extends MutableDoubleCollection> R select(DoublePredicate predicate, R target)
    {
        this.each(each ->
        {
            if (predicate.accept(each))
            {
                target.add(each);
            }
        });
        return target;
    }

    
Same as reject(DoublePredicate) , only the results are added to the target MutableDoubleCollection. 
Since:
8.1./**
     * Same as {@link #reject(DoublePredicate)} , only the results are added to the target MutableDoubleCollection.
     *
     * @since 8.1.
     */
    default <R extends MutableDoubleCollection> R reject(DoublePredicate predicate, R target)
    {
        this.each(each ->
        {
            if (!predicate.accept(each))
            {
                target.add(each);
            }
        });
        return target;
    }

    
Returns a new collection with the results of applying the specified function on each element of the source
collection.  This method is also commonly called transform or map.
/**
     * Returns a new collection with the results of applying the specified function on each element of the source
     * collection.  This method is also commonly called transform or map.
     */
    <V> RichIterable<V> collect(DoubleToObjectFunction<? extends V> function);

    
Same as collect(DoubleToObjectFunction<? extends Object>) , only the results are added to the target Collection. 
Since:
8.1./**
     * Same as {@link #collect(DoubleToObjectFunction)} , only the results are added to the target Collection.
     *
     * @since 8.1.
     */
    default <V, R extends Collection<V>> R collect(DoubleToObjectFunction<? extends V> function, R target)
    {
        this.each(each -> target.add(function.valueOf(each)));
        return target;
    }

    
flatCollect is a special case of collect(DoubleToObjectFunction<? extends Object>). With collect, when the DoubleToObjectFunction returns a collection, the result is a collection of collections. flatCollect outputs a single "flattened" collection instead. This method is commonly called flatMap. 
Since:
8.1./**
     * {@code flatCollect} is a special case of {@link #collect(DoubleToObjectFunction)}. With {@code collect}, when the {@link DoubleToObjectFunction} returns
     * a collection, the result is a collection of collections. {@code flatCollect} outputs a single "flattened" collection
     * instead.  This method is commonly called flatMap.
     *
     * @since 8.1.
     */
    default <V, R extends Collection<V>> R flatCollect(DoubleToObjectFunction<? extends Iterable<V>> function, R target)
    {
        this.each(each ->
        {
            Iterable<V> iterable = function.valueOf(each);
            if (iterable instanceof Collection)
            {
                target.addAll((Collection<V>) iterable);
            }
            else
            {
                iterable.forEach(target::add);
            }
        });
        return target;
    }

    
Returns the target MutableBooleanCollection with the results of applying the specified function on each element of the source collection. 
Since:
8.1./**
     * Returns the target {@code MutableBooleanCollection} with the results of applying the specified function on each element
     * of the source collection.
     *
     * @since 8.1.
     */
    default <R extends MutableBooleanCollection> R collectBoolean(DoubleToBooleanFunction function, R target)
    {
        this.each(each ->  target.add(function.valueOf(each)));
        return target;
    }

    
Returns the target MutableByteCollection with the results of applying the specified function on each element of the source collection. 
Since:
8.1./**
     * Returns the target {@code MutableByteCollection} with the results of applying the specified function on each element
     * of the source collection.
     *
     * @since 8.1.
     */
    default <R extends MutableByteCollection> R collectByte(DoubleToByteFunction function, R target)
    {
        this.each(each ->  target.add(function.valueOf(each)));
        return target;
    }

    
Returns the target MutableCharCollection with the results of applying the specified function on each element of the source collection. 
Since:
8.1./**
     * Returns the target {@code MutableCharCollection} with the results of applying the specified function on each element
     * of the source collection.
     *
     * @since 8.1.
     */
    default <R extends MutableCharCollection> R collectChar(DoubleToCharFunction function, R target)
    {
        this.each(each ->  target.add(function.valueOf(each)));
        return target;
    }

    
Returns the target MutableShortCollection with the results of applying the specified function on each element of the source collection. 
Since:
8.1./**
     * Returns the target {@code MutableShortCollection} with the results of applying the specified function on each element
     * of the source collection.
     *
     * @since 8.1.
     */
    default <R extends MutableShortCollection> R collectShort(DoubleToShortFunction function, R target)
    {
        this.each(each ->  target.add(function.valueOf(each)));
        return target;
    }

    
Returns the target MutableIntCollection with the results of applying the specified function on each element of the source collection. 
Since:
8.1./**
     * Returns the target {@code MutableIntCollection} with the results of applying the specified function on each element
     * of the source collection.
     *
     * @since 8.1.
     */
    default <R extends MutableIntCollection> R collectInt(DoubleToIntFunction function, R target)
    {
        this.each(each ->  target.add(function.valueOf(each)));
        return target;
    }

    
Returns the target MutableFloatCollection with the results of applying the specified function on each element of the source collection. 
Since:
8.1./**
     * Returns the target {@code MutableFloatCollection} with the results of applying the specified function on each element
     * of the source collection.
     *
     * @since 8.1.
     */
    default <R extends MutableFloatCollection> R collectFloat(DoubleToFloatFunction function, R target)
    {
        this.each(each ->  target.add(function.valueOf(each)));
        return target;
    }

    
Returns the target MutableLongCollection with the results of applying the specified function on each element of the source collection. 
Since:
8.1./**
     * Returns the target {@code MutableLongCollection} with the results of applying the specified function on each element
     * of the source collection.
     *
     * @since 8.1.
     */
    default <R extends MutableLongCollection> R collectLong(DoubleToLongFunction function, R target)
    {
        this.each(each ->  target.add(function.valueOf(each)));
        return target;
    }

    
Returns the target MutableDoubleCollection with the results of applying the specified function on each element of the source collection. 
Since:
8.1./**
     * Returns the target {@code MutableDoubleCollection} with the results of applying the specified function on each element
     * of the source collection.
     *
     * @since 8.1.
     */
    default <R extends MutableDoubleCollection> R collectDouble(DoubleToDoubleFunction function, R target)
    {
        this.each(each ->  target.add(function.valueOf(each)));
        return target;
    }

    double detectIfNone(DoublePredicate predicate, double ifNone);

    
Returns a count of the number of elements in the DoubleIterable that return true for the
specified predicate.
/**
     * Returns a count of the number of elements in the DoubleIterable that return true for the
     * specified predicate.
     */
    int count(DoublePredicate predicate);

    
Returns true if any of the elements in the DoubleIterable return true for the
specified predicate, otherwise returns false.
/**
     * Returns true if any of the elements in the DoubleIterable return true for the
     * specified predicate, otherwise returns false.
     */
    boolean anySatisfy(DoublePredicate predicate);

    
Returns true if all of the elements in the DoubleIterable return true for the
specified predicate, otherwise returns false.
/**
     * Returns true if all of the elements in the DoubleIterable return true for the
     * specified predicate, otherwise returns false.
     */
    boolean allSatisfy(DoublePredicate predicate);

    
Returns true if none of the elements in the DoubleIterable return true for the
specified predicate, otherwise returns false.
/**
     * Returns true if none of the elements in the DoubleIterable return true for the
     * specified predicate, otherwise returns false.
     */
    boolean noneSatisfy(DoublePredicate predicate);

    
Converts the DoubleIterable to a new MutableDoubleList.
/**
     * Converts the DoubleIterable to a new MutableDoubleList.
     */
    MutableDoubleList toList();

    
Converts the DoubleIterable to a new MutableDoubleSet.
/**
     * Converts the DoubleIterable to a new MutableDoubleSet.
     */
    MutableDoubleSet toSet();

    
Converts the DoubleIterable to a new MutableDoubleBag.
/**
     * Converts the DoubleIterable to a new MutableDoubleBag.
     */
    MutableDoubleBag toBag();

    
Returns a LazyDoubleIterable adapter wrapping the source DoubleIterable.
/**
     * Returns a LazyDoubleIterable adapter wrapping the source DoubleIterable.
     */
    LazyDoubleIterable asLazy();

    <T> T injectInto(T injectedValue, ObjectDoubleToObjectFunction<? super T, ? extends T> function);

    
See Also:
reduce(DoubleDoubleToDoubleFunction)
Since:
10.0/**
     * @see #reduce(DoubleDoubleToDoubleFunction)
     *
     * @since 10.0
     */
    default double reduceIfEmpty(DoubleDoubleToDoubleFunction accumulator, double defaultValue)
    {
        if (this.isEmpty())
        {
            return defaultValue;
        }
        else
        {
            return this.reduce(accumulator);
        }
    }

    
See Also:
reduce.reduce(BinaryOperator)
Since:
10.0/**
     * @see RichIterable#reduce(BinaryOperator)
     *
     * @since 10.0
     */
    default double reduce(DoubleDoubleToDoubleFunction accumulator)
    {
        boolean[] seenOne = new boolean[1];
        double[] result = new double[1];
        this.each(each ->
        {
            if (seenOne[0])
            {
                result[0] = accumulator.valueOf(result[0], each);
            }
            else
            {
                seenOne[0] = true;
                result[0] = each;
            }
        });
        if (!seenOne[0])
        {
            throw new NoSuchElementException();
        }
        else
        {
            return result[0];
        }
    }

    
Partitions elements in fixed size chunks.
Params:
size – the number of elements per chunk
Returns:
A RichIterable containing DoubleIterables of size size, except the last will be truncated if the elements don't divide evenly.
Since:
9.2/**
     * Partitions elements in fixed size chunks.
     *
     * @param size the number of elements per chunk
     *
     * @return A {@code RichIterable} containing {@code DoubleIterable}s of size {@code size}, except the last will be
     * truncated if the elements don't divide evenly.
     *
     * @since 9.2
     */
    default RichIterable<DoubleIterable> chunk(int size)
    {
        throw new UnsupportedOperationException("Default method to prevent breaking backwards compatibility");
    }

    double sum();

    
Since:
8.0/**
     * @since 8.0
     */
    default DoubleSummaryStatistics summaryStatistics()
    {
        DoubleSummaryStatistics stats = new DoubleSummaryStatistics();
        this.forEach(stats::accept);
        return stats;
    }

    double max();

    double maxIfEmpty(double defaultValue);

    double min();

    double minIfEmpty(double defaultValue);

    double average();

    
Since:
9.0/**
     * @since 9.0
     */
    default double averageIfEmpty(double defaultValue)
    {
        if (this.isEmpty())
        {
            return defaultValue;
        }
        return this.average();
    }

    double median();

    
Since:
9.0/**
     * @since 9.0
     */
    default double medianIfEmpty(double defaultValue)
    {
        if (this.isEmpty())
        {
            return defaultValue;
        }
        return this.median();
    }

    double[] toSortedArray();

    MutableDoubleList toSortedList();
}