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Command.kt
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Command.kt
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package org.vld.sdp.behavioral
/**
* Command interface order a dish
*/
typealias Order = () -> String
/**
* Command interface implementation and Receiver/Implementor. Command stores the request arguments (name) in a closure
*/
fun cookStarter(name: String): Order = { "$name Starter" }
fun cookMainCourse(name: String): Order = { "$name Main Course" }
fun cookDessert(name: String): Order = { "$name Dessert" }
/**
* Invoker implementation keeps the list of pending orders
*/
class Waiter(private val pendingOrders: MutableList<Order> = mutableListOf()) {
/**
* Accepts [orders] and queues the orders for execution
*/
fun acceptOrder(vararg orders: Order) = pendingOrders.addAll(orders)
/**
* Serves orders by executing the orders through the Command interface
*/
fun serveOrders(): List<String> = pendingOrders.map { it() }
}