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/*
* 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.
*/
public interface DoubleIterable extends PrimitiveIterable
{
/**
* 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.
*/
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.
*/
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.
*/
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.
*/
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.
*/
boolean containsAll(DoubleIterable source);
/**
* Applies the DoubleProcedure to each element in the DoubleIterable.
*/
void forEach(DoubleProcedure procedure);
/**
* A synonym for forEach.
*
* @since 7.0.
*/
void each(DoubleProcedure procedure);
/**
* @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.
*/
DoubleIterable select(DoublePredicate 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 {@link #select(DoublePredicate)} , only the results are added to the target MutableDoubleCollection.
*
* @since 8.1.
*/
default R select(DoublePredicate predicate, R target)
{
this.each(each ->
{
if (predicate.accept(each))
{
target.add(each);
}
});
return target;
}
/**
* Same as {@link #reject(DoublePredicate)} , only the results are added to the target MutableDoubleCollection.
*
* @since 8.1.
*/
default 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.
*/
RichIterable collect(DoubleToObjectFunction function);
/**
* Same as {@link #collect(DoubleToObjectFunction)} , only the results are added to the target Collection.
*
* @since 8.1.
*/
default > R collect(DoubleToObjectFunction function, R target)
{
this.each(each -> target.add(function.valueOf(each)));
return target;
}
/**
* {@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 > R flatCollect(DoubleToObjectFunction> function, R target)
{
this.each(each ->
{
Iterable iterable = function.valueOf(each);
if (iterable instanceof Collection)
{
target.addAll((Collection) iterable);
}
else
{
iterable.forEach(target::add);
}
});
return target;
}
/**
* 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 collectBoolean(DoubleToBooleanFunction function, R target)
{
this.each(each -> target.add(function.valueOf(each)));
return target;
}
/**
* 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 collectByte(DoubleToByteFunction function, R target)
{
this.each(each -> target.add(function.valueOf(each)));
return target;
}
/**
* 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 collectChar(DoubleToCharFunction function, R target)
{
this.each(each -> target.add(function.valueOf(each)));
return target;
}
/**
* 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 collectShort(DoubleToShortFunction function, R target)
{
this.each(each -> target.add(function.valueOf(each)));
return target;
}
/**
* 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 collectInt(DoubleToIntFunction function, R target)
{
this.each(each -> target.add(function.valueOf(each)));
return target;
}
/**
* 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 collectFloat(DoubleToFloatFunction function, R target)
{
this.each(each -> target.add(function.valueOf(each)));
return target;
}
/**
* 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 collectLong(DoubleToLongFunction function, R target)
{
this.each(each -> target.add(function.valueOf(each)));
return target;
}
/**
* 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 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.
*/
int count(DoublePredicate predicate);
/**
* 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.
*/
boolean allSatisfy(DoublePredicate predicate);
/**
* 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.
*/
MutableDoubleList toList();
/**
* Converts the DoubleIterable to a new MutableDoubleSet.
*/
MutableDoubleSet toSet();
/**
* Converts the DoubleIterable to a new MutableDoubleBag.
*/
MutableDoubleBag toBag();
/**
* Returns a LazyDoubleIterable adapter wrapping the source DoubleIterable.
*/
LazyDoubleIterable asLazy();
T injectInto(T injectedValue, ObjectDoubleToObjectFunction function);
/**
* @see #reduce(DoubleDoubleToDoubleFunction)
*
* @since 10.0
*/
default double reduceIfEmpty(DoubleDoubleToDoubleFunction accumulator, double defaultValue)
{
if (this.isEmpty())
{
return defaultValue;
}
else
{
return this.reduce(accumulator);
}
}
/**
* @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.
*
* @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 chunk(int size)
{
throw new UnsupportedOperationException("Default method to prevent breaking backwards compatibility");
}
double sum();
/**
* @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
*/
default double averageIfEmpty(double defaultValue)
{
if (this.isEmpty())
{
return defaultValue;
}
return this.average();
}
double median();
/**
* @since 9.0
*/
default double medianIfEmpty(double defaultValue)
{
if (this.isEmpty())
{
return defaultValue;
}
return this.median();
}
double[] toSortedArray();
MutableDoubleList toSortedList();
}
