CAMEL-7513: Fixed POJO aggregating when the parameter type was referr…

…ing to a type that was class annotated.

camel-core/src/main/java/org/apache/camel/processor/aggregate/AggregationStrategyBeanInfo.java

@@ -16,6 +16,7 @@
  */
 package org.apache.camel.processor.aggregate;
 
+import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.List;
@@ -62,10 +63,11 @@ protected AggregationStrategyMethodInfo createMethodInfo() {
         }
 
         // must not have annotations as they are not supported (yet)
-        for (int i = 0; i < size; i++) {
-            Class<?> type = parameterTypes[i];
-            if (type.getAnnotations().length > 0) {
-                throw new IllegalArgumentException("Parameter annotations at index " + i + " is not supported on method: " + method);
+        Annotation[][] parameterAnnotations = method.getParameterAnnotations();
+        for (int i = 0; i < parameterAnnotations.length; i++) {
+            Annotation[] annotations = parameterAnnotations[i];
+            if (annotations.length > 0) {
+                throw new IllegalArgumentException("Method parameter annotation: " + annotations[0] + " at index: " + i + " is not supported on method: " + method);
             }
         }
 

camel-core/src/test/java/org/apache/camel/processor/aggregator/AggregationStrategyBeanAdapterAllowNullTest.java

@@ -18,6 +18,7 @@
 
 import java.util.ArrayList;
 import java.util.List;
+import javax.xml.bind.annotation.XmlRootElement;
 
 import org.apache.camel.ContextTestSupport;
 import org.apache.camel.builder.RouteBuilder;
@@ -66,6 +67,10 @@ public List<String> addUsers(List<String> names, User user) {
         }
     }
 
+    /**
+     * We support annotations on the types.
+     */
+    @XmlRootElement(name = "user")
     public static final class User {
         private String name;