Example usage for org.springframework.core.annotation AnnotationUtils synthesizeAnnotation

Introduction

In this page you can find the example usage for org.springframework.core.annotation AnnotationUtils synthesizeAnnotation.

Prototype

public static <A extends Annotation> A synthesizeAnnotation(Map<String, Object> attributes,
        Class<A> annotationType, @Nullable AnnotatedElement annotatedElement) 

Source Link

Document

Synthesize an annotation from the supplied map of annotation attributes by wrapping the map in a dynamic proxy that implements an annotation of the specified annotationType and transparently enforces attribute alias semantics for annotation attributes that are annotated with AliasFor @AliasFor .

Usage

From source file:org.springframework.test.context.support.ContextLoaderUtils.java

/**
 * Resolve the list of lists of {@linkplain ContextConfigurationAttributes context
 * configuration attributes} for the supplied {@linkplain Class test class} and its
 * superclasses, taking into account context hierarchies declared via
 * {@link ContextHierarchy @ContextHierarchy} and
 * {@link ContextConfiguration @ContextConfiguration}.
 * <p>The outer list represents a top-down ordering of context configuration
 * attributes, where each element in the list represents the context configuration
 * declared on a given test class in the class hierarchy. Each nested list
 * contains the context configuration attributes declared either via a single
 * instance of {@code @ContextConfiguration} on the particular class or via
 * multiple instances of {@code @ContextConfiguration} declared within a
 * single {@code @ContextHierarchy} instance on the particular class.
 * Furthermore, each nested list maintains the order in which
 * {@code @ContextConfiguration} instances are declared.
 * <p>Note that the {@link ContextConfiguration#inheritLocations inheritLocations} and
 * {@link ContextConfiguration#inheritInitializers() inheritInitializers} flags of
 * {@link ContextConfiguration @ContextConfiguration} will <strong>not</strong>
 * be taken into consideration. If these flags need to be honored, that must be
 * handled manually when traversing the nested lists returned by this method.
 * @param testClass the class for which to resolve the context hierarchy attributes
 * (must not be {@code null})//www  .  j  ava2 s.  co  m
 * @return the list of lists of configuration attributes for the specified class;
 * never {@code null}
 * @throws IllegalArgumentException if the supplied class is {@code null}; or if
 * neither {@code @ContextConfiguration} nor {@code @ContextHierarchy} is
 * <em>present</em> on the supplied class
 * @throws IllegalStateException if a test class or composed annotation
 * in the class hierarchy declares both {@code @ContextConfiguration} and
 * {@code @ContextHierarchy} as top-level annotations.
 * @since 3.2.2
 * @see #buildContextHierarchyMap(Class)
 * @see #resolveContextConfigurationAttributes(Class)
 */
@SuppressWarnings("unchecked")
static List<List<ContextConfigurationAttributes>> resolveContextHierarchyAttributes(Class<?> testClass) {
    Assert.notNull(testClass, "Class must not be null");

    Class<ContextConfiguration> contextConfigType = ContextConfiguration.class;
    Class<ContextHierarchy> contextHierarchyType = ContextHierarchy.class;
    List<List<ContextConfigurationAttributes>> hierarchyAttributes = new ArrayList<>();

    UntypedAnnotationDescriptor desc = findAnnotationDescriptorForTypes(testClass, contextConfigType,
            contextHierarchyType);
    Assert.notNull(desc, () -> String.format(
            "Could not find an 'annotation declaring class' for annotation type [%s] or [%s] and test class [%s]",
            contextConfigType.getName(), contextHierarchyType.getName(), testClass.getName()));

    while (desc != null) {
        Class<?> rootDeclaringClass = desc.getRootDeclaringClass();
        Class<?> declaringClass = desc.getDeclaringClass();

        boolean contextConfigDeclaredLocally = isAnnotationDeclaredLocally(contextConfigType, declaringClass);
        boolean contextHierarchyDeclaredLocally = isAnnotationDeclaredLocally(contextHierarchyType,
                declaringClass);

        if (contextConfigDeclaredLocally && contextHierarchyDeclaredLocally) {
            String msg = String.format("Class [%s] has been configured with both @ContextConfiguration "
                    + "and @ContextHierarchy. Only one of these annotations may be declared on a test class "
                    + "or composed annotation.", declaringClass.getName());
            logger.error(msg);
            throw new IllegalStateException(msg);
        }

        List<ContextConfigurationAttributes> configAttributesList = new ArrayList<>();

        if (contextConfigDeclaredLocally) {
            ContextConfiguration contextConfiguration = AnnotationUtils.synthesizeAnnotation(
                    desc.getAnnotationAttributes(), ContextConfiguration.class, desc.getRootDeclaringClass());
            convertContextConfigToConfigAttributesAndAddToList(contextConfiguration, rootDeclaringClass,
                    configAttributesList);
        } else if (contextHierarchyDeclaredLocally) {
            ContextHierarchy contextHierarchy = getAnnotation(declaringClass, contextHierarchyType);
            if (contextHierarchy != null) {
                for (ContextConfiguration contextConfiguration : contextHierarchy.value()) {
                    convertContextConfigToConfigAttributesAndAddToList(contextConfiguration, rootDeclaringClass,
                            configAttributesList);
                }
            }
        } else {
            // This should theoretically never happen...
            String msg = String.format(
                    "Test class [%s] has been configured with neither @ContextConfiguration "
                            + "nor @ContextHierarchy as a class-level annotation.",
                    rootDeclaringClass.getName());
            logger.error(msg);
            throw new IllegalStateException(msg);
        }

        hierarchyAttributes.add(0, configAttributesList);
        desc = findAnnotationDescriptorForTypes(rootDeclaringClass.getSuperclass(), contextConfigType,
                contextHierarchyType);
    }

    return hierarchyAttributes;
}

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