Java Code Examples for java.lang.reflect.Field#getDeclaredAnnotations()

/**
 * Get the annotated relationship names.
 *
 * @param clazz Class for annotation.
 * @return List of relationship names.
 */
private HashMap<String, String> getRelationshipNames(Class clazz) {
  HashMap<String, String> relationNames = new HashMap<>();
  for (Field field : clazz.getDeclaredFields()) {
    String fieldName = field.getName();
    for (Annotation annotation : field.getDeclaredAnnotations()) {
      if (annotation.annotationType() == SerializedName.class) {
        SerializedName serializeName = (SerializedName)annotation;
        fieldName = serializeName.value();
      }
      if (annotation.annotationType() == Relationship.class) {
        Relationship relationshipAnnotation = (Relationship)annotation;
        relationNames.put(relationshipAnnotation.value(), fieldName);
      }
    }
  }

  return relationNames;
}
 

private void handleField(Field field) {
    Annotation[] annotations = field.getDeclaredAnnotations();

    for(Annotation annotation : annotations) {
        if(annotation.annotationType().isAssignableFrom(Preference.class)) {
            Preference preferenceAnnotation = (Preference) annotation;

            if (!preferenceAnnotation.enabled()) {
                return;
            }

            if (!preferenceAnnotation.name().isEmpty()) {
                mFieldsPreferencesMap.put(preferenceAnnotation.name(), field);
                return;
            }
        }
    }

    mFieldsPreferencesMap.put(field.getName(), field);
}
 

private GraphQLOutputType getGraphQLOutputTypeFromAnnotationsOnField(Class declaringClass, Method method, GraphQLOutputType graphQLOutputType, String name) {
    Field field = ReflectionUtil.getFieldByName(declaringClass, name);

    if (field != null) {
        Annotation[] fieldAnnotations = field.getDeclaredAnnotations();
        for (Annotation annotation: fieldAnnotations) {
            // custom OutputType
            if (annotationToGraphQLOutputTypeMap.containsKey(annotation.annotationType())) {
                Func5<TypeRegistry, Field, Method, Class, Annotation, GraphQLOutputType> customGraphQLOutputTypeFunc = annotationToGraphQLOutputTypeMap.get(annotation.annotationType());
                GraphQLOutputType outputType = customGraphQLOutputTypeFunc.call(this, field, method, declaringClass, annotation);
                if (outputType != null) {
                    graphQLOutputType = outputType;
                    break;
                }
            }
        }
    }
    return graphQLOutputType;
}
 

private static Map<Class<? extends Annotation>, List<Field>> groupFieldsByAnnotation(Field[] fields) {

        HashMap<Class<? extends Annotation>, List<Field>> groupedFields =
                new HashMap<Class<? extends Annotation>, List<Field>>();

        for (Field field : fields) {
            for (Annotation a : field.getDeclaredAnnotations()) {
                List<Field> fieldsForAnnotation = groupedFields.get(a.annotationType());
                if (fieldsForAnnotation == null) {
                    fieldsForAnnotation = new ArrayList<Field>();
                }
                fieldsForAnnotation.add(field);
                groupedFields.put(a.annotationType(), fieldsForAnnotation);
            }
        }

        return groupedFields;
    }
 

/**
 * 主解析方法
 * 解析注解并附加到已有的JSON树（继承）
 * @param head JSON树的根
 * @param object 被解析的类
 * @return 合并后的JSON树根
 */
private Map<String,Object> parse(Map<String,Object> head,@NotNull Object object){
    Class clazz=object.getClass();
        Field[] fields=clazz.getDeclaredFields();
        for(Field field:fields)
        {
            Object value=getFieldValue(field,object);
            Annotation[] annotations=field.getDeclaredAnnotations();
            for(Annotation an:annotations){
                if(!checkClass(an))continue;
                if(value==null) addAnnotationToMap(head,an,getAnnotationValue(an));
                else addAnnotationToMap(head,an,value);
            }
        }
    return head;
}
 

private static Set<Property> getProperties(Class item) {
    Set<Property> properties = new HashSet<Property>();
    for (Field field : item.getDeclaredFields()) {
        List<AnnotationRef> annotationRefs = new ArrayList<AnnotationRef>();
        for (Annotation annotation : field.getDeclaredAnnotations()) {
            annotationRefs.add(ANNOTATIONTYPEREF.apply(annotation.annotationType()));
        }
        field.getDeclaringClass();
        properties.add(new PropertyBuilder()
                .withName(field.getName())
                .withModifiers(field.getModifiers())
                .withAnnotations(annotationRefs)
                .withTypeRef(TYPEREF.apply(field.getGenericType()))
                .build());
    }
    return properties;
}
 

private static Map<Class<? extends Annotation>, List<Field>> groupFieldsByAnnotation(Field[] fields) {

        HashMap<Class<? extends Annotation>, List<Field>> groupedFields =
                new HashMap<Class<? extends Annotation>, List<Field>>();

        for (Field field : fields) {
            for (Annotation a : field.getDeclaredAnnotations()) {
                List<Field> fieldsForAnnotation = groupedFields.get(a.annotationType());
                if (fieldsForAnnotation == null) {
                    fieldsForAnnotation = new ArrayList<Field>();
                }
                fieldsForAnnotation.add(field);
                groupedFields.put(a.annotationType(), fieldsForAnnotation);
            }
        }

        return groupedFields;
    }
 

static void searchValidator(Class<?> clazz, String name, Map<String, List<Validator>> result) {
    for (Field field : clazz.getDeclaredFields()) {

        List<Validator> validators = new ArrayList<Validator>();
        String key = name + "." + field.getName();
        boolean containsAtValid = false;
        for (Annotation annotation : field.getDeclaredAnnotations()) {
            if (annotation.annotationType().getName().startsWith("play.data.validation")) {
                Validator validator = new Validator(annotation);
                validators.add(validator);
                if (annotation.annotationType().equals(Equals.class)) {
                    validator.params.put("equalsTo", name + "." + ((Equals) annotation).value());
                }
                if (annotation.annotationType().equals(InFuture.class)) {
                    validator.params.put("reference", ((InFuture) annotation).value());
                }
                if (annotation.annotationType().equals(InPast.class)) {
                    validator.params.put("reference", ((InPast) annotation).value());
                }

            }
            if (annotation.annotationType().equals(Valid.class)) {
                containsAtValid = true;
            }
        }
        if (!validators.isEmpty()) {
            result.put(key, validators);
        }
        if (containsAtValid) {
            searchValidator(field.getType(), key, result);
        }
    }
}
 

static Annotation[] getQualifiers(Field fieldToMock) {
    List<Annotation> qualifiers = new ArrayList<>();
    Annotation[] fieldAnnotations = fieldToMock.getDeclaredAnnotations();
    for (Annotation fieldAnnotation : fieldAnnotations) {
        for (Annotation annotationOfFieldAnnotation : fieldAnnotation.annotationType().getAnnotations()) {
            if (annotationOfFieldAnnotation.annotationType().equals(Qualifier.class)) {
                qualifiers.add(fieldAnnotation);
                break;
            }
        }
    }
    return qualifiers.toArray(new Annotation[0]);
}
 

/**
 * @param field
 *         java.lang.reflect.Field
 */
public FieldInjectorImpl(Field field, ParameterResolverFactory parameterResolverFactory) {
    this.field = field;
    this.parameterResolverFactory = parameterResolverFactory;
    this.annotations = field.getDeclaredAnnotations();

    final Class<?> declaringClass = field.getDeclaringClass();

    this.setter = getSetter(declaringClass, field);

    Annotation annotation = null;
    String defaultValue = null;
    boolean encoded = false;

    final boolean isProvider = declaringClass.getAnnotation(Provider.class) != null;
    final List<String> allowedAnnotation = isProvider ? PROVIDER_FIELDS_ANNOTATIONS : RESOURCE_FIELDS_ANNOTATIONS;

    for (int i = 0, length = annotations.length; i < length; i++) {
        Class<?> annotationType = annotations[i].annotationType();
        if (allowedAnnotation.contains(annotationType.getName())) {
            if (annotation != null) {
                throw new RuntimeException(
                        String.format("JAX-RS annotations on one of fields %s are equivocality. Annotations: %s and %s can't be applied to one field. ",
                                      field, annotation, annotations[i]));
            }
            annotation = annotations[i];
        } else if (annotationType == Encoded.class && !isProvider) {
            encoded = true;
        } else if (annotationType == DefaultValue.class && !isProvider) {
            defaultValue = ((DefaultValue)annotations[i]).value();
        }
    }
    this.defaultValue = defaultValue;
    this.annotation = annotation;
    this.encoded = encoded || declaringClass.getAnnotation(Encoded.class) != null;
}
 

/**
 * Scans all @IterationChop and @TimeChop annotated test classes in code base
 * and sets @ChopCluster annotated fields in these classes to their runtime values.
 * <p>
 * For this to work properly, fields in test classes should be declared as follows:
 * <p>
 *     <code>@ChopCluster( name = "ClusterName" )</code>
 *     <code>public static ICoordinatedCluster clusterToBeInjected;</code>
 * </p>
 * In this case, <code>clusterToBeInjected</code> field will be set to the cluster object
 * taken from the coordinator, if indeed a cluster with a name of "ClusterName" exists.
 */
private void injectClusters() {
    Collection<Class<?>> testClasses = new LinkedList<Class<?>>();
    testClasses.addAll( iterationChopClasses );
    testClasses.addAll( timeChopClasses );
    for( Class<?> iterationTest : testClasses ) {
        LOG.info( "Scanning test class {} for annotations", iterationTest.getName() );
        for( Field f : iterationTest.getDeclaredFields() ) {
            if( f.getType().isAssignableFrom( ICoordinatedCluster.class ) ) {
                for( Annotation annotation : f.getDeclaredAnnotations() ) {
                    if( annotation.annotationType().equals( ChopCluster.class )  ) {
                        String clusterName = ( ( ChopCluster ) annotation).name();
                        ICoordinatedCluster cluster;
                        if ( ! clusterMap.containsKey( clusterName ) ||
                                ( cluster = clusterMap.get( clusterName ) ) == null ) {
                            LOG.warn( "No clusters found with name: {}", clusterName );
                            continue;
                        }
                        try {
                            LOG.info( "Setting cluster {} on {} field", clusterName, f.getName() );
                            f.set( null, cluster );
                        }
                        catch ( IllegalAccessException e ) {
                            LOG.error( "Cannot access field {}", f.getName(), e );
                        }
                    }
                }
            }
        }
    }
}
 

protected FieldDescription.InDefinedShape describe(Field field) {
    return new FieldDescription.Latent(TypeDescription.ForLoadedType.of(field.getDeclaringClass()),
            field.getName(),
            field.getModifiers(),
            TypeDefinition.Sort.describe(field.getGenericType()),
            new AnnotationList.ForLoadedAnnotations(field.getDeclaredAnnotations()));
}
 

@Test(expected = InternalServerErrorException.class)
public void testJsr310DateExceptionHandling() {
    Field field = CustomerDetailsWithAdapter.class.getDeclaredFields()[0];
    Annotation[] paramAnns = field.getDeclaredAnnotations();
    InjectionUtils.createParameterObject(Collections.singletonList("wrongDate"), LocalDate.class,
            LocalDate.class, paramAnns, null, false, ParameterType.QUERY, createMessage());
}
 

private void addExposedTypes(Field field, Class<?> cause) {
  addExposedTypes(field.getGenericType(), cause);
  for (Annotation annotation : field.getDeclaredAnnotations()) {
    LOG.debug(
        "Adding exposed types from {}, which is an annotation on field {}", annotation, field);
    addExposedTypes(annotation.annotationType(), cause);
  }
}
 

/**
 * 绑定上下文
 *
 * @param target 对象
 * @throws ReflectException
 */
public static void validate(final Object target) throws ValidateException {
    if (target == null) {
        return;
    }
    Class<?> clazz = target.getClass();
    Field[] fields;
    Annotation[] annotations;
    Validator validator;
    Getter getter;
    // 遍历类及其父类
    while (clazz != null && clazz != Object.class) {
        // 获取字段
        fields = clazz.getDeclaredFields();
        // 遍历字段
        for (Field field : fields) {
            // 可能存在多个验证声明，只需要获取一次值
            getter = null;
            // 获取声明
            annotations = field.getDeclaredAnnotations();
            if (annotations != null) {
                // 遍历声明
                for (Annotation annotation : annotations) {
                    validator = getValidator(annotation);
                    // 判断是否能验证
                    if (validator != null) {
                        // 获取该字段的值
                        if (getter == null) {
                            getter = Getters.field(field, target, true);
                        }
                        // 验证
                        try {
                            validator.validate(target, annotation,
                                    new Validator.Value(field.getName(), field.getType(), getter.get()));
                        } catch (ReflectException e) {
                            throw new ValidateException(e.getMessage(), e);
                        }
                    }
                }
            }
        }
        // 父类
        clazz = clazz.getSuperclass();
    }
}
 

private boolean compatibleField(Field field) {
    if (mOdooVersion != null) {
        Annotation[] annotations = field.getDeclaredAnnotations();
        if (annotations.length > 0) {
            int version = 0;
            for (Annotation annotation : annotations) {
                // Check for odoo api annotation
                Class<? extends Annotation> type = annotation.annotationType();
                if (type.getDeclaringClass().isAssignableFrom(Odoo.api.class)) {
                    switch (mOdooVersion.getVersionNumber()) {
                        case 11:
                            if (type.isAssignableFrom(Odoo.api.v11alpha.class)) {
                                version++;
                            }
                            break;
                        case 10:
                            if (type.isAssignableFrom(Odoo.api.v10.class)) {
                                version++;
                            }
                            break;
                        case 9:
                            if (type.isAssignableFrom(Odoo.api.v9.class)) {
                                version++;
                            }
                            break;
                        case 8:
                            if (type.isAssignableFrom(Odoo.api.v8.class)) {
                                version++;
                            }
                            break;
                        case 7:
                            if (type.isAssignableFrom(Odoo.api.v7.class)) {
                                version++;
                            }
                            break;
                    }
                }
                // Check for functional annotation
                if (type.isAssignableFrom(Odoo.Functional.class)
                        || type.isAssignableFrom(Odoo.onChange.class)
                        || type.isAssignableFrom(Odoo.Domain.class)
                        || type.isAssignableFrom(Odoo.SyncColumnName.class)) {
                    version++;
                }
            }
            return (version > 0);
        }
        return true;
    }
    return false;
}
 

/**
 * The class of the incoming dto object builds the QueryMapper object, and the
 * constructed object is stored in the cache, which is retrieved directly from
 * the cache later.
 * 
 * @param dtoClass
 * @param pojoClass
 * @return QueryMapper
 */
private static QueryMapper buildQueryMapper(Class<?> dtoClass, Class<?> pojoClass) {
	QueryMapper queryMapper = queryMapperCache.get(dtoClass);
	if (queryMapper != null) {
		return queryMapper;
	}
	Map<String, ConditionMapper> conditionMapperCache = new WeakHashMap<>(16);
	Map<String, OrMapper> orMapperCache = new WeakHashMap<>(4);
	Field[] fields = null;

	ConditionMapperAnnotation conditionMapperAnnotation = null;
	ConditionMapper conditionMapper = null;
	Or or = null;
	OrMapper orMapper = null;
	queryMapper = new QueryMapper();
	fields = dtoClass.getDeclaredFields();

	Annotation[] conditionAnnotations = null;

	for (Field field : fields) {
		conditionAnnotations = field.getDeclaredAnnotations();
		if (conditionAnnotations.length == 0) {
			continue;
		}
		for (Annotation an : conditionAnnotations) {
			if (an instanceof ConditionMapperAnnotation) {
				conditionMapperAnnotation = (ConditionMapperAnnotation) an;
				conditionMapper = new ConditionMapper();
				buildConditionMapper(conditionMapper, conditionMapperAnnotation, pojoClass, field);

				conditionMapperCache.put(field.getName(), conditionMapper);
			} else if (an instanceof Or) {
				or = (Or) an;
				orMapper = new OrMapper();
				orMapper.setFieldName(field.getName());
				ConditionMapper[] conditionMappers = new ConditionMapper[or.value().length];
				int i = 0;
				for (ConditionMapperAnnotation cma : or.value()) {
					conditionMappers[i] = new ConditionMapper();
					buildConditionMapper(conditionMappers[i], cma, pojoClass, field);
					i++;
				}
				orMapper.setConditionMappers(conditionMappers);
				orMapperCache.put(field.getName(), orMapper);
			}
		}
	}
	queryMapper.setConditionMapperCache(conditionMapperCache);
	queryMapper.setOrMapperCache(orMapperCache);
	queryMapperCache.put(dtoClass, queryMapper);
	return queryMapper;
}
 

public static void main(String[] args) throws ReflectiveOperationException {

        Class<Melon> clazz = Melon.class;

        System.out.println("Inspecting package annotations: ");
        Annotation[] pckgAnnotations = clazz.getPackage().getAnnotations();
        System.out.println("Package annotations: " + Arrays.toString(pckgAnnotations));

        System.out.println("\nInspecting class annotations: ");
        Annotation[] clazzAnnotations = clazz.getAnnotations();
        System.out.println("Class annotations: " + Arrays.toString(clazzAnnotations));
        Fruit fruitAnnotation = (Fruit) clazzAnnotations[0];
        System.out.println("@Fruit name: " + fruitAnnotation.name());
        System.out.println("@Fruit value: " + fruitAnnotation.value());

        System.out.println("\nInspecting methods annotations: ");
        Method methodEat = clazz.getDeclaredMethod("eat");
        Annotation[] methodAnnotations = methodEat.getDeclaredAnnotations();
        System.out.println("Method annotations: " + Arrays.toString(methodAnnotations));
        Ripe ripeAnnotation = (Ripe) methodAnnotations[0];
        System.out.println("@Ripe value: " + ripeAnnotation.value());

        System.out.println("\nInspecting annotations of the thrown exceptions: ");
        AnnotatedType[] exceptionsTypes = methodEat.getAnnotatedExceptionTypes();
        System.out.println("Exceptions types: " + Arrays.toString(exceptionsTypes));
        System.out.println("First exception type: " + exceptionsTypes[0].getType());
        System.out.println("Annotations of the first exception type: "
                + Arrays.toString(exceptionsTypes[0].getAnnotations()));

        System.out.println("\nInspecting annotations of the return type");
        Method methodSeeds = clazz.getDeclaredMethod("seeds");
        AnnotatedType returnType = methodSeeds.getAnnotatedReturnType();
        System.out.println("Return type: " + returnType.getType().getTypeName());
        System.out.println("Annotations of the return type: "
                + Arrays.toString(returnType.getAnnotations()));

        System.out.println("\nInspecting annotations of the method's parameters: ");
        Method methodSlice = clazz.getDeclaredMethod("slice", int.class);
        Annotation[][] paramAnnotations = methodSlice.getParameterAnnotations();
        Class<?>[] parameterTypes = methodSlice.getParameterTypes();

        int i = 0;
        for (Annotation[] annotations : paramAnnotations) {
            Class parameterType = parameterTypes[i++];

            System.out.println("Parameter type: " + parameterType.getName());
            for (Annotation annotation : annotations) {
                System.out.println("Annotation: " + annotation);
                System.out.println("Annotation name: "
                        + annotation.annotationType().getSimpleName());
            }
        }

        System.out.println("\nInspecting annotations of fields: ");
        Field weightField = clazz.getDeclaredField("weight");
        Annotation[] fieldAnnotations = weightField.getDeclaredAnnotations();
        Unit unitFieldAnnotation = (Unit) fieldAnnotations[0];
        System.out.println("@Unit value: " + unitFieldAnnotation.value());

        System.out.println("\nInspecting annotations of superclass: ");
        AnnotatedType superclassType = clazz.getAnnotatedSuperclass();
        System.out.println("Superclass type: " + superclassType.getType().getTypeName());
        System.out.println("Annotations: " + Arrays.toString(superclassType.getDeclaredAnnotations()));
        System.out.println("@Family annotation present: " + superclassType.isAnnotationPresent(Family.class));

        System.out.println("\nInspecting annotations of interfaces: ");
        AnnotatedType[] interfacesTypes = clazz.getAnnotatedInterfaces();
        System.out.println("Interfaces types: " + Arrays.toString(interfacesTypes));
        System.out.println("First interface type: " + interfacesTypes[0].getType());
        System.out.println("Annotations of the first exception type: "
                + Arrays.toString(interfacesTypes[0].getAnnotations()));

        System.out.println("\nGet annotations by type:");
        Fruit[] clazzFruitAnnotations = clazz.getAnnotationsByType(Fruit.class);
        for (Fruit clazzFruitAnnotation : clazzFruitAnnotations) {
            System.out.println("Fruit annotation name: " + clazzFruitAnnotation.name());
            System.out.println("Fruit annotation value: " + clazzFruitAnnotation.value());
        }

        System.out.println("\nGet a declared annotation:");
        Ripe methodRipeAnnotation = methodEat.getDeclaredAnnotation(Ripe.class);
        System.out.println("Shape annotation value: " + methodRipeAnnotation.value());
    }
 

private void correctValueType(Class<?> clazz) {
    Field field = clazz.getDeclaredFields()[0];
    Annotation[] paramAnns = field.getDeclaredAnnotations();
    Class<?> valueType = JAXBUtils.getValueTypeFromAdapter(LocalDate.class, LocalDate.class, paramAnns);
    Assert.assertEquals(String.class, valueType);
}
 

/**
 * Constructor for the <code>FieldDetail</code> object. This takes
 * a field that has been extracted from a class. All of the details
 * such as the annotations and the field name are stored.
 * 
 * @param field this is the field that is represented by this
 */
public FieldDetail(Field field) {
   this.list = field.getDeclaredAnnotations();
   this.name = field.getName();
   this.field = field;
}