Svyatoslav Kuzmich
42 lines
1.5 KiB
Kotlin
42 lines
1.5 KiB
Kotlin
/*
|
|
* Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
|
|
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
|
|
*/
|
|
package kotlin.collections
|
|
|
|
import kotlin.js.JsName
|
|
|
|
/**
|
|
* Provides a skeletal implementation of the read-only [Collection] interface.
|
|
*
|
|
* @param E the type of elements contained in the collection. The collection is covariant on its element type.
|
|
*/
|
|
@SinceKotlin("1.1")
|
|
public abstract class AbstractCollection<out E> protected constructor() : Collection<E> {
|
|
abstract override val size: Int
|
|
abstract override fun iterator(): Iterator<E>
|
|
|
|
override fun contains(element: @UnsafeVariance E): Boolean = any { it == element }
|
|
|
|
override fun containsAll(elements: Collection<@UnsafeVariance E>): Boolean =
|
|
elements.all { contains(it) } // use when js will support bound refs: elements.all(this::contains)
|
|
|
|
override fun isEmpty(): Boolean = size == 0
|
|
|
|
override fun toString(): String = joinToString(", ", "[", "]") {
|
|
if (it === this) "(this Collection)" else it.toString()
|
|
}
|
|
|
|
/**
|
|
* Returns new array of type `Array<Any?>` with the elements of this collection.
|
|
*/
|
|
@JsName("toArray")
|
|
protected open fun toArray(): Array<Any?> = copyToArrayImpl(this)
|
|
|
|
/**
|
|
* Fills the provided [array] or creates new array of the same type
|
|
* and fills it with the elements of this collection.
|
|
*/
|
|
protected open fun <T> toArray(array: Array<T>): Array<T> = copyToArrayImpl(this, array)
|
|
}
|