With JEP 118 (Access to Parameter Names at Runtime) introduced in Java 8, the CDI SPI could be enriched so that AnnotatedParameter provide access to parameter names of methods and constructors.

In addition to class and method names that are used for default naming convention in producer methods that rely on InjectionPoint metadata, parameter name could be used as well to implement default convention for method parameter injection point.

One example of such a pattern is implemented in the Metrics CDI extension and that would avoid to rely on the Java API: https://github.com/astefanutti/metrics-cdi/blob/master/impl/src/main/java/io/astefanutti/metrics/cdi/MetricProducer.java#L126.

That is something Spring 4 now provides with SPR-9643.