ArC: throw NPE when null value is used for AdditionalBeanBuildItem

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

@@ -5,7 +5,6 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
-import java.util.stream.Collectors;
 
 import org.jboss.jandex.DotName;
 
@@ -42,7 +41,7 @@ public static Builder builder() {
      */
     @CheckReturnValue
     public static AdditionalBeanBuildItem unremovableOf(Class<?> beanClass) {
-        return new AdditionalBeanBuildItem(Collections.singletonList(beanClass.getName()), false, null);
+        return new AdditionalBeanBuildItem(List.of(beanClass.getName()), false, null);
     }
 
     /**
@@ -53,29 +52,29 @@ public static AdditionalBeanBuildItem unremovableOf(Class<?> beanClass) {
      */
     @CheckReturnValue
     public static AdditionalBeanBuildItem unremovableOf(String beanClass) {
-        return new AdditionalBeanBuildItem(Collections.singletonList(beanClass), false, null);
+        return new AdditionalBeanBuildItem(List.of(beanClass), false, null);
     }
 
     private final List<String> beanClasses;
     private final boolean removable;
     private final DotName defaultScope;
 
     public AdditionalBeanBuildItem(String... beanClasses) {
-        this(Arrays.asList(beanClasses), true, null);
+        this(List.of(beanClasses), true, null);
     }
 
     public AdditionalBeanBuildItem(Class<?>... beanClasses) {
-        this(Arrays.stream(beanClasses).map(Class::getName).collect(Collectors.toList()), true, null);
+        this(Arrays.stream(beanClasses).map(Class::getName).toArray(String[]::new));
     }
 
-    AdditionalBeanBuildItem(List<String> beanClasses, boolean removable, DotName defaultScope) {
+    private AdditionalBeanBuildItem(List<String> beanClasses, boolean removable, DotName defaultScope) {
         this.beanClasses = beanClasses;
         this.removable = removable;
         this.defaultScope = defaultScope;
     }
 
     public List<String> getBeanClasses() {
-        return Collections.unmodifiableList(beanClasses);
+        return beanClasses;
     }
 
     public boolean contains(String beanClass) {
@@ -151,7 +150,7 @@ public Builder setDefaultScope(DotName defaultScope) {
         }
 
         public AdditionalBeanBuildItem build() {
-            return new AdditionalBeanBuildItem(new ArrayList<>(beanClasses), removable, defaultScope);
+            return new AdditionalBeanBuildItem(List.copyOf(beanClasses), removable, defaultScope);
         }
 
     }

extensions/arc/deployment/src/test/java/io/quarkus/arc/test/deployment/AdditionalBeanBuildItemTest.java

@@ -0,0 +1,20 @@
+package io.quarkus.arc.test.deployment;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+
+import io.quarkus.arc.deployment.AdditionalBeanBuildItem;
+
+public class AdditionalBeanBuildItemTest {
+
+    @Test
+    public void testNullNames() {
+        assertThrows(NullPointerException.class, () -> AdditionalBeanBuildItem.unremovableOf((String) null));
+        assertThrows(NullPointerException.class, () -> AdditionalBeanBuildItem.unremovableOf((Class<?>) null));
+        assertThrows(NullPointerException.class, () -> AdditionalBeanBuildItem.builder().addBeanClasses(null, "Foo").build());
+        assertThrows(NullPointerException.class, () -> new AdditionalBeanBuildItem("Bar", null));
+        assertThrows(NullPointerException.class, () -> new AdditionalBeanBuildItem(String.class, null));
+    }
+
+}