Prevent https://bugs.openjdk.org/browse/JDK-8180450 for cache code

extensions/arc/runtime/src/main/java/io/quarkus/arc/runtime/InterceptorBindings.java

@@ -5,6 +5,7 @@
 
 import javax.interceptor.InvocationContext;
 
+import io.quarkus.arc.AbstractAnnotationLiteral;
 import io.quarkus.arc.ArcInvocationContext;
 
 public class InterceptorBindings {
@@ -13,4 +14,14 @@ public class InterceptorBindings {
     public static Set<Annotation> getInterceptorBindings(InvocationContext invocationContext) {
         return (Set<Annotation>) invocationContext.getContextData().get(ArcInvocationContext.KEY_INTERCEPTOR_BINDINGS);
     }
+
+    /**
+     * This method is just a convenience for getting a hold of {@link AbstractAnnotationLiteral}.
+     * See the Javadoc of the class for an explanation of the reasons it might be used {@link Annotation}.
+     */
+    @SuppressWarnings("unchecked")
+    public static Set<AbstractAnnotationLiteral> getInterceptorBindingLiterals(InvocationContext invocationContext) {
+        return (Set<AbstractAnnotationLiteral>) invocationContext.getContextData()
+                .get(ArcInvocationContext.KEY_INTERCEPTOR_BINDINGS);
+    }
 }

extensions/cache/runtime/src/main/java/io/quarkus/cache/runtime/CacheInterceptionContext.java

@@ -1,11 +1,11 @@
 package io.quarkus.cache.runtime;
 
-import java.lang.annotation.Annotation;
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
 
-public class CacheInterceptionContext<T extends Annotation> {
+// this should be <T extends Annotation> but that leads to type pollution
+public class CacheInterceptionContext<T> {
 
     private final List<T> interceptorBindings;
     private final List<Short> cacheKeyParameterPositions;

extensions/cache/runtime/src/main/java/io/quarkus/cache/runtime/CacheInterceptor.java

@@ -18,6 +18,7 @@
 
 import org.jboss.logging.Logger;
 
+import io.quarkus.arc.AbstractAnnotationLiteral;
 import io.quarkus.arc.runtime.InterceptorBindings;
 import io.quarkus.cache.Cache;
 import io.quarkus.cache.CacheException;
@@ -47,8 +48,10 @@ public abstract class CacheInterceptor {
      * interception is managed by another CDI interceptors implementation. It can happen for example while using caching
      * annotations on a MicroProfile REST Client method. In that case, we have no other choice but to rely on reflection (with
      * underlying synchronized blocks which are bad for performances) to retrieve the interceptor bindings.
+     *
+     * IMPORTANT: Normally <T> would be <T extends Annotation>, but that leads to type pollution
      */
-    protected <T extends Annotation> CacheInterceptionContext<T> getInterceptionContext(InvocationContext invocationContext,
+    protected <T> CacheInterceptionContext<T> getInterceptionContext(InvocationContext invocationContext,
             Class<T> interceptorBindingClass, boolean supportsCacheKey) {
         return getArcCacheInterceptionContext(invocationContext, interceptorBindingClass)
                 .orElseGet(new Supplier<CacheInterceptionContext<T>>() {
@@ -59,29 +62,31 @@ public CacheInterceptionContext<T> get() {
                 });
     }
 
-    private <T extends Annotation> Optional<CacheInterceptionContext<T>> getArcCacheInterceptionContext(
+    @SuppressWarnings("unchecked")
+    private <T> Optional<CacheInterceptionContext<T>> getArcCacheInterceptionContext(
             InvocationContext invocationContext, Class<T> interceptorBindingClass) {
-        Set<Annotation> bindings = InterceptorBindings.getInterceptorBindings(invocationContext);
-        if ((bindings == null) || bindings.isEmpty()) {
+        Set<AbstractAnnotationLiteral> bindings = InterceptorBindings.getInterceptorBindingLiterals(invocationContext);
+        if (bindings == null) {
             LOGGER.trace("Interceptor bindings not found in ArC");
             // This should only happen when the interception is not managed by Arc.
             return Optional.empty();
         }
-        List<T> interceptorBindings = new ArrayList<>(bindings.size() / 2); // initial capacity is a heuristic here...
-        List<Short> cacheKeyParameterPositions = new ArrayList<>(bindings.size() / 2);
-        for (Annotation binding : bindings) {
-            if (binding instanceof CacheKeyParameterPositions) {
+        List<T> interceptorBindings = new ArrayList<>();
+        List<Short> cacheKeyParameterPositions = new ArrayList<>();
+        for (AbstractAnnotationLiteral binding : bindings) {
+            if (binding.annotationType().isAssignableFrom(CacheKeyParameterPositions.class)) {
                 for (short position : ((CacheKeyParameterPositions) binding).value()) {
                     cacheKeyParameterPositions.add(position);
                 }
-            } else if (interceptorBindingClass.isInstance(binding)) {
-                interceptorBindings.add(cast(binding, interceptorBindingClass));
+            } else if (binding.annotationType().isAssignableFrom((interceptorBindingClass))) {
+                interceptorBindings.add((T) binding);
             }
         }
         return Optional.of(new CacheInterceptionContext<>(interceptorBindings, cacheKeyParameterPositions));
     }
 
-    private <T extends Annotation> CacheInterceptionContext<T> getNonArcCacheInterceptionContext(
+    @SuppressWarnings("unchecked")
+    private <T> CacheInterceptionContext<T> getNonArcCacheInterceptionContext(
             InvocationContext invocationContext, Class<T> interceptorBindingClass, boolean supportsCacheKey) {
         LOGGER.trace("Retrieving interceptor bindings using reflection");
         List<T> interceptorBindings = new ArrayList<>();
@@ -94,7 +99,7 @@ private <T extends Annotation> CacheInterceptionContext<T> getNonArcCacheInterce
                     cacheKeyParameterPositions.add(position);
                 }
             } else if (interceptorBindingClass.isInstance(annotation)) {
-                interceptorBindings.add(cast(annotation, interceptorBindingClass));
+                interceptorBindings.add((T) annotation);
             }
         }
         if (supportsCacheKey && !cacheKeyParameterPositionsFound) {