[ISSUE] Backtrack to root cause of registration in exceptions

[quantummaiddeveloper]

Do you have an idea to improve the project? Please describe. Exceptions should tell why a type is needed for injection.

Compelling example where the user has no clue what's wrong where

java.lang.ExceptionInInitializerError
...
Caused by: de.quantummaid.injectmaid.InjectMaidException: Cannot decide how to instantiate type 'java.lang.String':
More than one public constructors or factory methods found
No annotations have been detected
More than one public constructors found
Static factories are not considered because public constructors have been found
    at de.quantummaid.injectmaid.InjectMaidException.injectMaidException(InjectMaidException.java:32)
    at de.quantummaid.injectmaid.statemachine.StateMachineRunner.runStateMachine(StateMachineRunner.java:69)
    at de.quantummaid.injectmaid.InjectMaidBuilder.build(InjectMaidBuilder.java:179)
    at de.builderrahmen.kurator.reliablemessaging.test.Handler$Companion.createInjectMaid(Handler.kt:156)
    at de.builderrahmen.kurator.reliablemessaging.test.Handler$Companion.access$createInjectMaid(Handler.kt:54)
    at de.builderrahmen.kurator.reliablemessaging.test.Handler.<clinit>(Handler.kt:56)
    ... 59 more

Is your feature request related to a problem? Please describe. It is not always obvious what top-level registered type caused another type to be registered.

Describe the solution you'd like A stack-trace like visualization of the dependency tree that lead to the registration of a type (see MapMaid).

[lestephane]

Test Idea.

• InjectMaid knows about a Map<String, String>
• User code getInstance() with Map<String,Boolean> What should the error message look like? Will there even be an exception?

[lestephane]

I have encountered another case where this would help. I have a dummy InjectorConfiguration that denies injection of a specific dependency:

inline fun <reified T> InjectMaidBuilder.denyInjectionsOfType(clazz: Class<T>): InjectMaidBuilder {
    return this.withCustomType(clazz) {
        throw DependencyInjectionDeniedException(clazz)
    }
}

The error message does not say who tried to get the denied dependency injected

de.quantummaid.injectmaid.InjectMaidException: Exception during instantiation of 'SqsClient'
  using custom instantiation via 'SCRUBBED.DenyDependencyInjectorConfigKt$denyInjectionsOfType$1@6f901d62'
...
Caused by: de.builderrahmen.examples.counter.sum.internal.infra.di.DependencyInjectionDeniedException:
  software.amazon.awssdk.services.sqs.SqsClient

(no indication of what class was being injected)