Proxy is not created considering all class interfaces

[alberto_souza]

I have a strange situation... I have this class:

[java]

@Inject

  public MethodValidatorInterceptor(javax.validation.Validator bvalidator,) {

     this.bvalidator = bvalidator;

  }

@Override

  public void intercept(InterceptorStack stack, ControllerMethod method, Object controllerInstance)

  throws InterceptionException {

  Set<ConstraintViolation<Object>> violations = bvalidator.forExecutables()

  .validateParameters(controllerInstance, method.getMethod(), methodInfo.getParameters());

[/java]

When i run a integration test with WeldSE i get a ClassCastException becasuse forExecutables() returns ExecutableValidator. The implementation is like this:

[java]

public class ValidatorImpl implements Validator, ExecutableValidator {

   @Override

     public ExecutableValidator forExecutables() {

       return this;

     }

   }

[/java]

When I debug code, the interfaces returned by reflection not contain ExecutableValidator that is why i  get ClassCastException. But, when I run the same code with WeldListener inside Tomcat, everything goes fine. Am i missing something?

Alberto

[alberto_souza]

A more simple example:

[java]

  Validator validator = cdiBasedContainer.instanceFor(Validator.class);

  ExecutableValidator evalidator = validator.forExecutables();

  System.out.println(evalidator.toString());

[/java]

This code throws ClassCastException:

java.lang.ClassCastException: org.jboss.weld.proxies.Validator$742456564$Proxy$_$$_WeldClientProxy cannot be cast to javax.validation.executable.ExecutableValidator

  at org.jboss.weld.proxies.Validator$742456564$Proxy$_$$_WeldClientProxy.forExecutables(Unknown Source)

  at br.com.caelum.vraptor.test.VRaptorNavigationSimpleScenariosTest.shouldValidateObject(VRaptorNavigationSimpleScenariosTest.java:54)

  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

  at java.lang.reflect.Method.invoke(Method.java:601)

I think this a weldse bug... The correct behavior should be implement all class implementations... But when i run the webapp, and Tomcat7Container is used, the same code runs fine

[luksa]

The proxy is created based on the injection point's type, not the bean's actual type.

Apparently, I shouldn't be answering questions until I'm fully awake

The proxy is based on the bean type, of course. Your Validator is probably created by a producer method, so the bean type is based on the method's return type. But, IIRC, DeltaSpike does in fact scan all the injection points and create beans with bean types based on the injection points themselves.

More info at: [WELD-1498] ClassCastException when proxied class return this - JBoss Issue Tracker

[alberto_souza]

I see... But, even so, i think the proxy should be created respecting implementation interfaces... Another doubt is the different behavior between Tomcat7Container and WeldContainer(se mode)... Do you know anything about? I tried to take a look inside the classes but I did not find any reason...

Thanks!!

[alberto_souza]

I updated the weld version to rc1 and everything is working. Thanks for the tip .