ClassUtils.java 文件源码

public static boolean containsTypeAnnotation(AnnotatedType type, Class<? extends Annotation> annotation) {
    if (type.isAnnotationPresent(annotation)) {
        return true;
    }
    if (type instanceof AnnotatedParameterizedType) {
        AnnotatedParameterizedType parameterizedType = ((AnnotatedParameterizedType) type);
        return Arrays.stream(parameterizedType.getAnnotatedActualTypeArguments())
                .anyMatch(param -> containsTypeAnnotation(param, annotation));
    }
    if (type instanceof AnnotatedTypeVariable) {
        AnnotatedTypeVariable variable = ((AnnotatedTypeVariable) type);
        return Arrays.stream(variable.getAnnotatedBounds())
                .anyMatch(bound -> containsTypeAnnotation(bound, annotation));
    }
    if (type instanceof AnnotatedWildcardType) {
        AnnotatedWildcardType wildcard = ((AnnotatedWildcardType) type);
        return Stream.concat(
                Arrays.stream(wildcard.getAnnotatedLowerBounds()),
                Arrays.stream(wildcard.getAnnotatedUpperBounds()))
                .anyMatch(param -> containsTypeAnnotation(param, annotation));
    }
    if (type instanceof AnnotatedArrayType) {
        return containsTypeAnnotation(((AnnotatedArrayType) type).getAnnotatedGenericComponentType(), annotation);
    }
    return false;
}