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WAL 202 did exceptions #777
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Quality Gate passedIssues Measures |
@@ -65,17 +69,18 @@ data class ServiceMap( | |||
) { | |||
|
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init { | |||
require(id.isNotBlank()) { "Service property id cannot be blank" } | |||
require(id.isNotBlank()) { throw InvalidServiceIdException("Service property id cannot be blank") } |
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require
already throws an IllegalArgumentException
and within that lambda function you provide the message which the exception should be constructed with
so, what happens when you throw within the lambda lazyMessage
function itself is:
require
callslazyMessage()
to retrieve the message / object to get passed along with the exception- during that call it fails
- and throws the exception that was constructed within the
lazyMessage
function (hence never finishing the assignment tomessage
and not proceeding with the rest of the flow)
an option would be to create a custom require method, e.g.:
private fun require(condition: Boolean, type: KType, callback: () -> String) {
if (!condition) {
throw createException(type, callback())
}
}
private fun createException(type: KType, message: String) = when (type) {
typeOf<InvalidServiceIdException>() -> InvalidServiceIdException(message)
typeOf<InvalidServiceTypeException>() -> InvalidServiceTypeException(message)
typeOf<EmptyServiceEndpointException>() -> EmptyServiceEndpointException(message)
else -> IllegalArgumentException(message)
}
then call it, e.g.:
init {
require(id.isNotBlank(), typeOf<InvalidServiceIdException>()) { "Service property id cannot be blank" }
type.forEach {
require(it.isNotBlank(), typeOf<InvalidServiceTypeException>()) { "Service type strings cannot be blank" }
}
require(
serviceEndpoint.isNotEmpty(), typeOf<EmptyServiceEndpointException>()
) { "Service endpoint set cannot be empty" }
customProperties?.forEach {
require(!reservedKeys.contains(it.key), typeOf<ReservedKeyOverrideException>()) {
"Invalid attempt to override reserved Service property with key ${it.key} via customProperties map"
}
}
}
in pure jvm, require
could use more reflection, e.g.:
private fun require(condition: Boolean, clazz: KClass<Throwable>, callback: () -> String) {
if (!condition) {
val constructor = clazz::class.primaryConstructor
throw constructor!!.call(callback()).objectInstance!!
}
}
but I'm not sure smth. similar is available in multiplatform
however, neither one is an elegant solution
Description
Provide a clear and concise description of the changes made in this pull request:
Enhance did exceptions with custom exceptions with meaningful error messages
Type of Change
Checklist
Breaking