core/it.unibo.pulvreakt.api.context/Context

Context

Models the execution context on which a component is running. Contains the information about the device id belonging to the component and the host where the system is running. Metadata can be added and queried to the context to provide additional application-specific information.

val context: Context = Context(1.toId(), host)
val value: Int? = context["key"] // returns null
context["key"] = 1
val value: Int? = context["key"] // returns 1
val invalid: Double? = context["key"] // returns null

Types

Companion

object Companion

Properties

deviceId

abstract val deviceId: Id

The Id of the Logical Device managed by the instance of the middleware.

host

abstract val host: Host

The Host where the system is running.

Functions

get

abstract operator fun <T : Any> get(key: String): T?

Returns the value associated with the given key or null if no value is associated with the given key. The method return null if the type of the value is not the same as the type of the variable.

set

abstract operator fun <T : Any> set(key: String, value: T)

Associates the specified value with the specified key in the context. If the context previously contained a value associated with the key, the old value is replaced by the specified value.