[weld-dev] Class#getGenericInterfaces() on a CDI proxy

Hi all! While working on an issue [1] in Hibernate Validator, We've stumbled on, what seems to be, a bug in Weld. We have a generic interface: @ValidateOnExecution(type = { ExecutableType.NON_GETTER_METHODS, ExecutableType.GETTER_METHODS }) public interface Repeater<T> { String repeat(@NotNull String in); @NotNull T reverse(T in); @NotNull String getHelloWorld(); } and then it's impl: @ValidateOnExecution public class DefaultRepeater implements Repeater<String> { @Override public String repeat(String in) { return in; } @Override public String reverse(String in) { return null; } @Override public String getHelloWorld() { return null; } } In the internals of HV we need to make a call to `Class#getGenericInterfaces()`. In case of calling it on `DefaultRepeater` class we will get something similar to: result = {Type[1]@4948} 0 = {ParameterizedTypeImpl@4863} "org.hibernate.validator.test. cdi.internal.methodvalidation.Repeater<java.lang.String>" But in case when validation run in CDI context we receive a proxy instead (something like org.hibernate.validator.test.cdi.internal.methodvalidation. DefaultRepeater$Proxy$_$$_WeldSubclass). And if we call `Class#getGenericInterfaces()` on such proxy we'd get next results: result = {Class[6]@4880} 0 = {Class@3049} "interface org.hibernate.validator.test. cdi.internal.methodvalidation.Repeater" 1 = {Class@327} "interface java.io.Serializable" 2 = {Class@4636} "interface org.jboss.weld.proxy.WeldConstruct" 3 = {Class@4638} "interface org.jboss.weld.interceptor.util.proxy. TargetInstanceProxy" 4 = {Class@4637} "interface org.jboss.weld.interceptor. proxy.LifecycleMixin" 5 = {Class@4639} "interface org.jboss.weld.bean.proxy.ProxyObject" The only line of interest here is 0. As you can see it gives a raw, non-generic type, while `ParameterizedType` was expected (Repeater<java.lang.String>). Is that expected/intended behavior of `Class#getGenericInterfaces()` (returning raw types) for CDI proxies? Have a nice day, Marko [1] https://github.com/hibernate/hibernate-validator/pull/931# issuecomment-372619324