Fix @Require annotations so that features implied by absent features are not also required to be absent.

Fixes #7401

RELNOTES=`collect.testing.features`: Fixed `@Require` annotations so that features implied by absent features are not also required to be absent.
PiperOrigin-RevId: 682731934

Author: chaoren

android/guava-testlib/src/com/google/common/collect/testing/features/FeatureUtil.java

@@ -16,15 +16,17 @@
 
 package com.google.common.collect.testing.features;
 
+import static com.google.common.collect.testing.Helpers.copyToSet;
+import static java.util.Collections.disjoint;
+import static java.util.Collections.unmodifiableList;
+
 import com.google.common.annotations.GwtIncompatible;
-import com.google.common.collect.testing.Helpers;
 import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.AnnotatedElement;
 import java.lang.reflect.Method;
 import java.util.ArrayDeque;
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.LinkedHashSet;
 import java.util.List;
@@ -39,9 +41,9 @@
  * @author George van den Driessche
  */
 @GwtIncompatible
-public class FeatureUtil {
+public final class FeatureUtil {
   /** A cache of annotated objects (typically a Class or Method) to its set of annotations. */
-  private static Map<AnnotatedElement, List<Annotation>> annotationCache = new HashMap<>();
+  private static final Map<AnnotatedElement, List<Annotation>> annotationCache = new HashMap<>();
 
   private static final Map<Class<?>, TesterRequirements> classTesterRequirementsCache =
       new HashMap<>();
@@ -181,16 +183,14 @@ private static TesterRequirements buildTesterRequirements(Annotation testerAnnot
     Feature<?>[] presentFeatures;
     Feature<?>[] absentFeatures;
     try {
-      presentFeatures = (Feature[]) annotationClass.getMethod("value").invoke(testerAnnotation);
-      absentFeatures = (Feature[]) annotationClass.getMethod("absent").invoke(testerAnnotation);
+      presentFeatures = (Feature<?>[]) annotationClass.getMethod("value").invoke(testerAnnotation);
+      absentFeatures = (Feature<?>[]) annotationClass.getMethod("absent").invoke(testerAnnotation);
     } catch (Exception e) {
       throw new IllegalArgumentException("Error extracting features from tester annotation.", e);
     }
-    Set<Feature<?>> allPresentFeatures =
-        addImpliedFeatures(Helpers.<Feature<?>>copyToSet(presentFeatures));
-    Set<Feature<?>> allAbsentFeatures =
-        addImpliedFeatures(Helpers.<Feature<?>>copyToSet(absentFeatures));
-    if (!Collections.disjoint(allPresentFeatures, allAbsentFeatures)) {
+    Set<Feature<?>> allPresentFeatures = addImpliedFeatures(copyToSet(presentFeatures));
+    Set<Feature<?>> allAbsentFeatures = copyToSet(absentFeatures);
+    if (!disjoint(allPresentFeatures, allAbsentFeatures)) {
       throw new ConflictingRequirementsException(
           "Annotation explicitly or "
               + "implicitly requires one or more features to be both present "
@@ -239,7 +239,7 @@ public static Iterable<Annotation> getTesterAnnotations(AnnotatedElement classOr
             annotations.add(a);
           }
         }
-        annotations = Collections.unmodifiableList(annotations);
+        annotations = unmodifiableList(annotations);
         annotationCache.put(classOrMethod, annotations);
       }
       return annotations;
@@ -279,7 +279,7 @@ private static void checkConflict(
       Set<Feature<?>> newFeatures,
       Object source)
       throws ConflictingRequirementsException {
-    if (!Collections.disjoint(newFeatures, earlierFeatures)) {
+    if (!disjoint(newFeatures, earlierFeatures)) {
       throw new ConflictingRequirementsException(
           String.format(
               Locale.ROOT,
@@ -292,10 +292,17 @@ private static void checkConflict(
     }
   }
 
-  /** Construct a new {@link java.util.Set} that is the intersection of the given sets. */
+  /**
+   * Construct a new {@link java.util.Set} that is the intersection of the given sets.
+   *
+   * @deprecated Use {@link com.google.common.collect.Sets#intersection(Set, Set)} instead.
+   */
+  @Deprecated
   public static <T> Set<T> intersection(Set<? extends T> set1, Set<? extends T> set2) {
-    Set<T> result = Helpers.<T>copyToSet(set1);
+    Set<T> result = copyToSet(set1);
     result.retainAll(set2);
     return result;
   }
+
+  private FeatureUtil() {}
 }