/*
* Copyright 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.core.ext.typeinfo;
import java.lang.annotation.Annotation;
/**
* Interface implemented by elements that can have annotations. This interface
* is a departure for GWT in that it used types declared in the
* java.lang.annotation package instead of types declared as part of this
* typeinfo package. This reflects a compromise between a pure
* {@link TypeOracle} model and one that is more useful to developers.
*/
public interface HasAnnotations {
/**
* Returns an instance of the specified annotation type if it is present on
* this element or <code>null</code> if it is not.
*
* @param annotationClass annotation type to search for
* @return instance of the specified annotation type if it is present on this
* element or <code>null</code> if it is not
*/
<T extends Annotation> T getAnnotation(Class<T> annotationClass);
/**
* Returns all the annotations present on this element.
*/
Annotation[] getAnnotations();
/**
* Returns the annotations declared directly on this element; does not include
* any inherited annotations.
*/
Annotation[] getDeclaredAnnotations();
/**
* Returns <code>true</code> if this item has an annotation of the specified
* type.
*
* @param annotationClass
*
* @return <code>true</code> if this item has an annotation of the specified
* type
*/
boolean isAnnotationPresent(Class<? extends Annotation> annotationClass);
}