jvmMain.io.nacular.doodle.utils.Observables.kt Maven / Gradle / Ivy

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package io.nacular.doodle.utils

import java.util.concurrent.CopyOnWriteArraySet

/**
 * Created by Nicholas Eddy on 7/22/21.
 */
public actual open class SetPool actual constructor(protected actual val delegate: MutableSet): Pool, Set by delegate {
    public actual constructor(): this(CopyOnWriteArraySet())

    override fun plusAssign (item: T) { delegate += item }
    override fun minusAssign(item: T) { delegate -= item }
}

public actual class ChangeObserversImpl actual constructor(private val source: S, mutableSet: MutableSet>): SetPool>(mutableSet) {
    public actual constructor(source: S): this(source, CopyOnWriteArraySet())

    public actual operator fun invoke(): Unit = delegate.forEach { it(source) }
}

public actual class PropertyObserversImpl actual constructor(private val source: S, mutableSet: MutableSet>): SetPool>(mutableSet) {
    public actual constructor(source: S): this(source, CopyOnWriteArraySet())

    public actual operator fun invoke(old: T, new: T): Unit = delegate.forEach { it(source, old, new) }
}