com.google.gwt.core.ext.typeinfo

## Interface HasAnnotations

- All Known Subinterfaces:
    JAbstractMethod, JAnnotationMethod, JAnnotationType, JArrayType, JClassType, JConstructor, JEnumConstant, JEnumType, JField, JGenericType, JMethod, JPackage, JParameter, JParameterizedType, JRawType, JRealClassType, JTypeParameter, JWildcardType

      public interface HasAnnotations

  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 `TypeOracle` model and one that is more useful to developers.

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `<T extends java.lang.annotation.Annotation> T` | `getAnnotation(java.lang.Class<T> annotationClass)` Returns an instance of the specified annotation type if it is present on this element or `null` if it is not.
    `java.lang.annotation.Annotation[]` | `getAnnotations()` Returns all the annotations present on this element.
    `java.lang.annotation.Annotation[]` | `getDeclaredAnnotations()` Returns the annotations declared directly on this element; does not include any inherited annotations.
    `boolean` | `isAnnotationPresent(java.lang.Class<? extends java.lang.annotation.Annotation> annotationClass)` Returns `true` if this item has an annotation of the specified type.

- - ### Method Detail

    - #### getAnnotation

          <T extends java.lang.annotation.Annotation> T getAnnotation(java.lang.Class<T> annotationClass)

      Returns an instance of the specified annotation type if it is present on this element or `null` if it is not.
      Parameters:
        `annotationClass` - annotation type to search for
      Returns:
        instance of the specified annotation type if it is present on this element or `null` if it is not

    - #### getAnnotations

          java.lang.annotation.Annotation[] getAnnotations()

      Returns all the annotations present on this element.

    - #### getDeclaredAnnotations

          java.lang.annotation.Annotation[] getDeclaredAnnotations()

      Returns the annotations declared directly on this element; does not include any inherited annotations.

    - #### isAnnotationPresent

          boolean isAnnotationPresent(java.lang.Class<? extends java.lang.annotation.Annotation> annotationClass)

      Returns `true` if this item has an annotation of the specified type.
      Parameters:
        `annotationClass` -
      Returns:
        `true` if this item has an annotation of the specified type