ArC: allow putting bean enablement annotations on stereotypes

docs/src/main/asciidoc/cdi-reference.adoc

@@ -601,6 +601,8 @@
 
 NOTE: The runtime profile has absolutely no effect on the bean resolution using `@IfBuildProfile` and `@UnlessBuildProfile`.
 
+TIP: It is also possible to use `@IfBuildProfile` and `@UnlessBuildProfile` on stereotypes.
+
 [[enable_build_properties]]
 === Enabling Beans for Quarkus Build Properties
 
@@ -652,11 +654,13 @@
 }
 ----
 
 NOTE: Properties set at runtime have absolutely no effect on the bean resolution using `@IfBuildProperty`.
 
+TIP: It is also possible to use `@IfBuildProperty` and `@UnlessBuildProperty` on stereotypes.
+
 === Declaring Selected Alternatives
 
 In CDI, an alternative bean may be selected either globally for an application by means of `@Priority`, or for a bean archive using a `beans.xml` descriptor.
 Quarkus has a simplified bean discovery and the content of `beans.xml` is ignored.
 
 However, it is also possible to select alternatives for an application using the unified configuration.

extensions/arc/deployment/src/main/java/io/quarkus/arc/deployment/BuildTimeConditionBuildItem.java

@@ -17,7 +17,7 @@ public BuildTimeConditionBuildItem(AnnotationTarget target, boolean enabled) {
                 this.target = target;
                 break;
             default:
-                throw new IllegalArgumentException("'target' can only be a class, a field or a method");
+                throw new IllegalArgumentException("'target' can only be a class, a field or a method: " + target);
         }
         this.enabled = enabled;
     }

extensions/arc/deployment/src/main/java/io/quarkus/arc/deployment/BuildTimeEnabledStereotypesBuildItem.java

@@ -0,0 +1,53 @@
+package io.quarkus.arc.deployment;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.jboss.jandex.AnnotationInstance;
+import org.jboss.jandex.DotName;
+
+import io.quarkus.builder.item.SimpleBuildItem;
+
+final class BuildTimeEnabledStereotypesBuildItem extends SimpleBuildItem {
+    private final Map<DotName, BuildTimeEnabledStereotype> map;
+
+    BuildTimeEnabledStereotypesBuildItem(List<BuildTimeEnabledStereotype> buildTimeEnabledStereotypes) {
+        Map<DotName, BuildTimeEnabledStereotype> map = new HashMap<>();
+        for (BuildTimeEnabledStereotype buildTimeEnabledStereotype : buildTimeEnabledStereotypes) {
+            map.put(buildTimeEnabledStereotype.name, buildTimeEnabledStereotype);
+        }
+        this.map = map;
+    }
+
+    boolean isStereotype(DotName name) {
+        return map.containsKey(name);
+    }
+
+    BuildTimeEnabledStereotype getStereotype(DotName stereotypeName) {
+        return map.get(stereotypeName);
+    }
+
+    Collection<BuildTimeEnabledStereotype> all() {
+        return map.values();
+    }
+
+    static final class BuildTimeEnabledStereotype {
+        final DotName name;
+        final boolean inheritable; // meta-annotated `@Inherited`
+
+        // enablement annotations present directly _or transitively_ on this stereotype
+        final Map<DotName, List<AnnotationInstance>> annotations;
+
+        BuildTimeEnabledStereotype(DotName name, boolean inheritable, Map<DotName, List<AnnotationInstance>> annotations) {
+            this.name = name;
+            this.inheritable = inheritable;
+            this.annotations = annotations;
+        }
+
+        List<AnnotationInstance> getEnablementAnnotations(DotName enablementAnnotationName) {
+            return annotations.getOrDefault(enablementAnnotationName, List.of());
+        }
+    }
+}

extensions/arc/deployment/src/test/java/io/quarkus/arc/test/profile/IfBuildProfileStereotypeTest.java

@@ -0,0 +1,195 @@
+package io.quarkus.arc.test.profile;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import jakarta.enterprise.context.ApplicationScoped;
+import jakarta.enterprise.inject.Any;
+import jakarta.enterprise.inject.Instance;
+import jakarta.enterprise.inject.Produces;
+import jakarta.enterprise.inject.Stereotype;
+import jakarta.inject.Inject;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.arc.profile.IfBuildProfile;
+import io.quarkus.test.QuarkusUnitTest;
+
+public class IfBuildProfileStereotypeTest {
+    @RegisterExtension
+    static final QuarkusUnitTest config = new QuarkusUnitTest()
+            .withApplicationRoot((jar) -> jar
+                    .addClasses(DevOnly.class, InheritableDevOnly.class, TransitiveDevOnly.class,
+                            InheritableTransitiveDevOnly.class, MyService.class, DevOnlyMyService.class,
+                            InheritableDevOnlyMyService.class, TransitiveDevOnlyMyService.class,
+                            InheritableTransitiveDevOnlyMyService.class, MyServiceSimple.class,
+                            MyServiceDevOnlyDirect.class, MyServiceDevOnlyTransitive.class,
+                            MyServiceDevOnlyOnSuperclassNotInheritable.class,
+                            MyServiceDevOnlyOnSuperclassInheritable.class,
+                            MyServiceDevOnlyTransitiveOnSuperclassNotInheritable.class,
+                            MyServiceDevOnlyTransitiveOnSuperclassInheritable.class, Producers.class));
+
+    @Inject
+    @Any
+    Instance<MyService> services;
+
+    @Test
+    public void test() {
+        Set<String> hello = services.stream().map(MyService::hello).collect(Collectors.toSet());
+        Set<Object> expected = Set.of(
+                MyServiceSimple.class.getSimpleName(),
+                MyServiceDevOnlyOnSuperclassNotInheritable.class.getSimpleName(),
+                MyServiceDevOnlyTransitiveOnSuperclassNotInheritable.class.getSimpleName(),
+                Producers.SIMPLE);
+        assertEquals(expected, hello);
+    }
+
+    @IfBuildProfile("dev")
+    @Stereotype
+    @Target({ ElementType.TYPE, ElementType.METHOD, ElementType.FIELD })
+    @Retention(RetentionPolicy.RUNTIME)
+    public @interface DevOnly {
+    }
+
+    @IfBuildProfile("dev")
+    @Stereotype
+    @Inherited
+    @Target({ ElementType.TYPE, ElementType.METHOD, ElementType.FIELD })
+    @Retention(RetentionPolicy.RUNTIME)
+    public @interface InheritableDevOnly {
+    }
+
+    @DevOnly
+    @Stereotype
+    @Target({ ElementType.TYPE, ElementType.METHOD, ElementType.FIELD })
+    @Retention(RetentionPolicy.RUNTIME)
+    public @interface TransitiveDevOnly {
+    }
+
+    @DevOnly
+    @Stereotype
+    @Inherited
+    @Target({ ElementType.TYPE, ElementType.METHOD, ElementType.FIELD })
+    @Retention(RetentionPolicy.RUNTIME)
+    public @interface InheritableTransitiveDevOnly {
+    }
+
+    interface MyService {
+        String hello();
+    }
+
+    @DevOnly
+    static abstract class DevOnlyMyService implements MyService {
+    }
+
+    @InheritableDevOnly
+    static abstract class InheritableDevOnlyMyService implements MyService {
+    }
+
+    @TransitiveDevOnly
+    static abstract class TransitiveDevOnlyMyService implements MyService {
+    }
+
+    @InheritableTransitiveDevOnly
+    static abstract class InheritableTransitiveDevOnlyMyService implements MyService {
+    }
+
+    @ApplicationScoped
+    static class MyServiceSimple implements MyService {
+        @Override
+        public String hello() {
+            return MyServiceSimple.class.getSimpleName();
+        }
+    }
+
+    @ApplicationScoped
+    @DevOnly
+    static class MyServiceDevOnlyDirect implements MyService {
+        @Override
+        public String hello() {
+            return MyServiceDevOnlyDirect.class.getSimpleName();
+        }
+    }
+
+    @ApplicationScoped
+    @TransitiveDevOnly
+    static class MyServiceDevOnlyTransitive implements MyService {
+        @Override
+        public String hello() {
+            return MyServiceDevOnlyTransitive.class.getSimpleName();
+        }
+    }
+
+    @ApplicationScoped
+    static class MyServiceDevOnlyOnSuperclassNotInheritable extends DevOnlyMyService {
+        @Override
+        public String hello() {
+            return MyServiceDevOnlyOnSuperclassNotInheritable.class.getSimpleName();
+        }
+    }
+
+    @ApplicationScoped
+    static class MyServiceDevOnlyOnSuperclassInheritable extends InheritableDevOnlyMyService {
+        @Override
+        public String hello() {
+            return MyServiceDevOnlyOnSuperclassInheritable.class.getSimpleName();
+        }
+    }
+
+    @ApplicationScoped
+    static class MyServiceDevOnlyTransitiveOnSuperclassNotInheritable extends TransitiveDevOnlyMyService {
+        @Override
+        public String hello() {
+            return MyServiceDevOnlyTransitiveOnSuperclassNotInheritable.class.getSimpleName();
+        }
+    }
+
+    @ApplicationScoped
+    static class MyServiceDevOnlyTransitiveOnSuperclassInheritable extends InheritableTransitiveDevOnlyMyService {
+        @Override
+        public String hello() {
+            return MyServiceDevOnlyTransitiveOnSuperclassInheritable.class.getSimpleName();
+        }
+    }
+
+    @ApplicationScoped
+    static class Producers {
+        static final String SIMPLE = "Producers.simple";
+        static final String DEV_ONLY_DIRECT = "Producers.devOnlyDirect";
+        static final String DEV_ONLY_TRANSITIVE = "Producers.devOnlyTransitive";
+
+        @Produces
+        MyService simple = new MyService() {
+            @Override
+            public String hello() {
+                return SIMPLE;
+            }
+        };
+
+        @Produces
+        @DevOnly
+        MyService devOnlyDirect = new MyService() {
+            @Override
+            public String hello() {
+                return DEV_ONLY_DIRECT;
+            }
+        };
+
+        @Produces
+        @TransitiveDevOnly
+        MyService devOnlyTransitive = new MyService() {
+            @Override
+            public String hello() {
+                return DEV_ONLY_TRANSITIVE;
+            }
+        };
+    }
+}