检查类是否在同一个包或子包中访问的java ArchUnit规则？

Question

我的自定义注释@Inner对类进行了注释

我想为ArchUnit创建一个规则，以检测是否在同一个包或子包中访问使用此特定注释注释的类

例如：

包：com.example.my.package

包含类：MyInner，该类用@Inner注释

因此，规则应该检查MyInner是否仅从com.example.my.package或com.example.my.package.baz访问

Answer 1

我发现了这样的规则：

public class DependencyRules {

    @PublicAPI(usage = ACCESS)
    public static ArchCondition<JavaClass> accessClassesThatResideInAnUpperPackage() {
        return new AccessClassesThatResideInAnUpperPackageCondition();
    }

    private static class AccessClassesThatResideInAnUpperPackageCondition extends ArchCondition<JavaClass> {
        AccessClassesThatResideInAnUpperPackageCondition() {
            super("access classes that reside in an upper package");
        }

        @Override
        public void check(final JavaClass clazz, final ConditionEvents events) {
            for (JavaAccess<?> access : clazz.getAccessesFromSelf()) {
                boolean callToSuperPackage = isCallToSuperPackage(access.getOriginOwner(), access.getTargetOwner());
                events.add(new SimpleConditionEvent(access, callToSuperPackage, access.getDescription()));
            }
        }

        private boolean isCallToSuperPackage(JavaClass origin, JavaClass target) {
            String originPackageName = getOutermostEnclosingClass(origin).getPackageName();
            String targetSubPackagePrefix = getOutermostEnclosingClass(target).getPackageName() + ".";
            return originPackageName.startsWith(targetSubPackagePrefix);
        }

        private JavaClass getOutermostEnclosingClass(JavaClass javaClass) {
            while (javaClass.getEnclosingClass().isPresent()) {
                javaClass = javaClass.getEnclosingClass().get();
            }
            return javaClass;
        }
    }
}

资料来源：https://github.com/TNG/ArchUnit/commit/5f7fadc0f67ba61e2c9fe94bfe494303780c37d7