/*
 * 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.IntSummaryStatistics;

import org.eclipse.collections.api.bag.primitive.MutableCharBag;
import org.eclipse.collections.api.block.function.primitive.LongCharToLongFunction;
import org.eclipse.collections.api.block.function.primitive.CharToBooleanFunction;
import org.eclipse.collections.api.block.function.primitive.CharToByteFunction;
import org.eclipse.collections.api.block.function.primitive.CharToShortFunction;
import org.eclipse.collections.api.block.function.primitive.CharToCharFunction;
import org.eclipse.collections.api.block.function.primitive.CharToDoubleFunction;
import org.eclipse.collections.api.block.function.primitive.CharToFloatFunction;
import org.eclipse.collections.api.block.function.primitive.CharToIntFunction;
import org.eclipse.collections.api.block.function.primitive.CharToLongFunction;
import org.eclipse.collections.api.block.function.primitive.ObjectCharToObjectFunction;
import org.eclipse.collections.api.block.function.primitive.CharToObjectFunction;
import org.eclipse.collections.api.block.predicate.primitive.CharPredicate;
import org.eclipse.collections.api.block.procedure.primitive.CharProcedure;
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.CharIterator;
import org.eclipse.collections.api.list.primitive.MutableCharList;
import org.eclipse.collections.api.set.primitive.MutableCharSet;

CharIterable is an interface which is memory-optimized for char 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 CharIterator. CharIterator helps iterate over the CharIterable without boxing the primitives.
This file was automatically generated from template file primitiveIterable.stg.
/**
 * CharIterable is an interface which is memory-optimized for char 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 CharIterator. CharIterator helps iterate over the CharIterable without boxing the primitives.
 * This file was automatically generated from template file primitiveIterable.stg.
 */
public interface CharIterable extends PrimitiveIterable
{
    
Returns a primitive iterator that can be used to iterate over the CharIterable in an
imperative style.
/**
     * Returns a primitive iterator that can be used to iterate over the CharIterable in an
     * imperative style.
     */
    CharIterator charIterator();

    
Converts the CharIterable to a primitive char array.
/**
     * Converts the CharIterable to a primitive char array.
     */
    char[] toArray();

    
Converts the CharIterable to a primitive char 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 CharIterable to a primitive char 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 char[] toArray(char[] target)
    {
        return this.toList().toArray(target);
    }

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

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

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

    
Applies the CharProcedure to each element in the CharIterable.
/**
     * Applies the CharProcedure to each element in the CharIterable.
     */
    void forEach(CharProcedure procedure);

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

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

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

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

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

    
Same as reject(CharPredicate) , only the results are added to the target MutableCharCollection. 
Since:
8.1./**
     * Same as {@link #reject(CharPredicate)} , only the results are added to the target MutableCharCollection.
     *
     * @since 8.1.
     */
    default <R extends MutableCharCollection> R reject(CharPredicate 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(CharToObjectFunction<? extends V> function);

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

    
flatCollect is a special case of collect(CharToObjectFunction<? extends Object>). With collect, when the CharToObjectFunction 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(CharToObjectFunction)}. With {@code collect}, when the {@link CharToObjectFunction} 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(CharToObjectFunction<? 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(CharToBooleanFunction 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(CharToByteFunction 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(CharToCharFunction 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(CharToShortFunction 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(CharToIntFunction 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(CharToFloatFunction 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(CharToLongFunction 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(CharToDoubleFunction function, R target)
    {
        this.each(each ->  target.add(function.valueOf(each)));
        return target;
    }

    char detectIfNone(CharPredicate predicate, char ifNone);

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

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

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

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

    
Converts the CharIterable to a new MutableCharList.
/**
     * Converts the CharIterable to a new MutableCharList.
     */
    MutableCharList toList();

    
Converts the CharIterable to a new MutableCharSet.
/**
     * Converts the CharIterable to a new MutableCharSet.
     */
    MutableCharSet toSet();

    
Converts the CharIterable to a new MutableCharBag.
/**
     * Converts the CharIterable to a new MutableCharBag.
     */
    MutableCharBag toBag();

    
Returns a LazyCharIterable adapter wrapping the source CharIterable.
/**
     * Returns a LazyCharIterable adapter wrapping the source CharIterable.
     */
    LazyCharIterable asLazy();

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

    
See Also:
reduce(LongCharToLongFunction)
Since:
10.0/**
     * @see #reduce(LongCharToLongFunction)
     *
     * @since 10.0
     */
    default long reduceIfEmpty(LongCharToLongFunction accumulator, long 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 long reduce(LongCharToLongFunction accumulator)
    {
        boolean[] seenOne = new boolean[1];
        long[] result = new long[1];
        this.each(each ->
        {
            if (seenOne[0])
            {
                result[0] = accumulator.valueOf(result[0], each);
            }
            else
            {
                seenOne[0] = true;
                result[0] = (long) 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 CharIterables 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 CharIterable}s of size {@code size}, except the last will be
     * truncated if the elements don't divide evenly.
     *
     * @since 9.2
     */
    default RichIterable<CharIterable> chunk(int size)
    {
        throw new UnsupportedOperationException("Default method to prevent breaking backwards compatibility");
    }

    long sum();

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

    char max();

    char maxIfEmpty(char defaultValue);

    char min();

    char minIfEmpty(char 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();
    }

    char[] toSortedArray();

    MutableCharList toSortedList();
}