Kotlin Programming Cookbook

How it works…

The delegation of a property looks like this:

class Delegate {    operator fun getValue(            thisRef: Any?,            property: KProperty<*>    ): String {        // return value    }    operator fun setValue(            thisRef: Any?,            property: KProperty<*>, value: String    ) {        // assign    }}

The read operation calls the getValue method, and the write operation calls setValue.

There are three modes of evaluation of lazy properties:

• LazyThreadSafetyMode.SYNCHRONIZED: Initialization occurs only on one thread. The rest of the threads see the cached value. It is also the default mode of initialization.
• LazyThreadSafetyMode.PUBLICATION: Used when synchronization of initialization delegate is not required. It can then be called from multiple threads at a time, and initialization ...