io.javalin.config.AppDataManager.kt Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of javalin Show documentation

There is a newer version: 6.3.0

package io.javalin.config

data class Key(val id: String)

class KeyAlreadyExistsException(key: Key<*>) : IllegalStateException("Key '$key' already exists")
class NoValueForKeyException(key: Key<*>) : IllegalStateException("No value for key '$key'")

class AppDataManager {

    private val data: MutableMap, Any?> = mutableMapOf()

    fun  register(key: Key, value: T) {
        if (data.containsKey(key)) {
            throw KeyAlreadyExistsException(key)
        }
        data[key] = value
    }

    fun  registerIfAbsent(key: Key, value: T) {
        registerResolverIfAbsent(key, value)
    }

    fun  registerResolverIfAbsent(key: Key, value: T) {
        data.putIfAbsent(key, value)
    }

    fun  get(key: Key): T {
        return data[key] as T? ?: throw NoValueForKeyException(key)
    }

}