8010680: Clarify "present" and annotation ordering in javax.lang.model
Reviewed-by: abuckley, jjg
--- a/langtools/src/share/classes/javax/lang/model/AnnotatedConstruct.java Wed May 22 09:59:05 2013 -0700
+++ b/langtools/src/share/classes/javax/lang/model/AnnotatedConstruct.java Wed May 22 13:34:03 2013 -0700
@@ -39,35 +39,76 @@
* are on a <em>declaration</em>, whereas annotations on a type are on
* a specific <em>use</em> of a type name.
*
- * The terms <em>directly present</em> and <em>present</em> are used
+ * The terms <em>directly present</em>, <em>present</em>,
+ * <em>indirectly present</em>, and <em>associated </em> are used
* throughout this interface to describe precisely which annotations
- * are returned by methods:
+ * are returned by the methods defined herein.
*
- * <p>An annotation <i>A</i> is <em>directly present</em> on a
- * construct <i>E</i> if <i>E</i> is annotated, and:
+ * <p>In the definitions below, an annotation <i>A</i> has an
+ * annotation type <i>AT</i>. If <i>AT</i> is a repeatable annotation
+ * type, the type of the containing annotation is <i>ATC</i>.
+ *
+ * <p>Annotation <i>A</i> is <em>directly present</em> on a construct
+ * <i>C</i> if either:
*
* <ul>
*
- * <li> for an invocation of {@code getAnnotation(Class<T>)} or
- * {@code getAnnotationMirrors()}, <i>E</i>'s annotations contain <i>A</i>.
+ * <li><i>A</i> is explicitly or implicitly declared as applying to
+ * the source code representation of <i>C</i>.
+ *
+ * <p>Typically, if exactly one annotation of type <i>AT</i> appears in
+ * the source code of representation of <i>C</i>, then <i>A</i> is
+ * explicitly declared as applying to <i>C</i>.
*
- * <li> for an invocation of {@code getAnnotationsByType(Class<T>)},
- * <i>E</i>'s annotations either contain <i>A</i> or, if the type of
- * <i>A</i> is repeatable, contain exactly one annotation whose value
- * element contains <i>A</i> and whose type is the containing
- * annotation type of <i>A</i>'s type.
+ * If there are multiple annotations of type <i>AT</i> present on
+ * <i>C</i>, then if <i>AT</i> is repeatable annotation type, an
+ * annotation of type <i>ATC</i> is implicitly declared on <i>C</i>.
+ *
+ * <li> A representation of <i>A</i> appears in the executable output
+ * for <i>C</i>, such as the {@code RuntimeVisibleAnnotations} or
+ * {@code RuntimeVisibleParameterAnnotations} attributes of a class
+ * file.
*
* </ul>
*
- * <p>An annotation A is <em>present</em> on a construct E if either:
+ * <p>An annotation <i>A</i> is <em>present</em> on a
+ * construct <i>C</i> if either:
+ * <ul>
+ *
+ * <li><i>A</i> is directly present on <i>C</i>.
+ *
+ * <li>No annotation of type <i>AT</i> is directly present on
+ * <i>C</i>, and <i>C</i> is a class and <i>AT</i> is inheritable
+ * and <i>A</i> is present on the superclass of <i>C</i>.
+ *
+ * </ul>
+ *
+ * An annotation <i>A</i> is <em>indirectly present</em> on a construct
+ * <i>C</i> if both:
*
* <ul>
- * <li> <i>A</i> is <em>directly present</em> on <i>E</i>; or
+ *
+ * <li><i>AT</i> is a repeatable annotation type with a containing
+ * annotation type <i>ATC</i>.
+ *
+ * <li>An annotation of type <i>ATC</i> is directly present on
+ * <i>C</i> and <i>A</i> is an annotation included in the result of
+ * calling the {@code value} method of the directly present annotation
+ * of type <i>ATC</i>.
+ *
+ * </ul>
*
- * <li> <i>A</i> is not <em>directly present</em> on <i>E</i>, and
- * <i>E</i> is an element representing a class, and <i>A</i>'s type
- * is inheritable, and <i>A</i> is <em>present</em> on the element
- * representing the superclass of <i>E</i>.
+ * An annotation <i>A</i> is <em>associated</em> with a construct
+ * <i>C</i> if either:
+ *
+ * <ul>
+ *
+ * <li> <i>A</i> is directly or indirectly present on <i>C</i>.
+ *
+ * <li> No annotation of type <i>AT</i> is directly or indirectly
+ * present on <i>C</i>, and <i>C</i> is a class, and <i>AT</i> is
+ * inheritable, and <i>A</i> is associated with the superclass of
+ * <i>C</i>.
*
* </ul>
*
@@ -86,9 +127,8 @@
List<? extends AnnotationMirror> getAnnotationMirrors();
/**
- * Returns this construct's annotation of the
- * specified type if such an annotation is <em>present</em>, else {@code
- * null}.
+ * Returns this construct's annotation of the specified type if
+ * such an annotation is <em>present</em>, else {@code null}.
*
* <p> The annotation returned by this method could contain an element
* whose value is of type {@code Class}.
@@ -118,9 +158,8 @@
* @param <A> the annotation type
* @param annotationType the {@code Class} object corresponding to
* the annotation type
- * @return this element's or type use's annotation for the
- * specified annotation type if present on this element, else
- * {@code null}
+ * @return this construct's annotation for the specified
+ * annotation type if present, else {@code null}
*
* @see #getAnnotationMirrors()
* @see java.lang.reflect.AnnotatedElement#getAnnotation
@@ -134,10 +173,16 @@
<A extends Annotation> A getAnnotation(Class<A> annotationType);
/**
- * Returns annotations that are <em>present</em> on this construct.
+ * Returns annotations that are <em>associated</em> with this construct.
+ *
+ * If there are no annotations associated with this construct, the
+ * return value is an array of length 0.
*
- * If there are no annotations <em>present</em> on this construct,
- * the return value is an array of length 0.
+ * The order of annotations which are directly or indirectly
+ * present on a construct <i>C</i> is computed as if indirectly present
+ * annotations on <i>C</i> are directly present on <i>C</i> in place of their
+ * container annotation, in the order in which they appear in the
+ * value element of the container annotation.
*
* The difference between this method and {@link #getAnnotation(Class)}
* is that this method detects if its argument is a <em>repeatable
@@ -172,8 +217,8 @@
* @param <A> the annotation type
* @param annotationType the {@code Class} object corresponding to
* the annotation type
- * @return this element's annotations for the specified annotation
- * type if present on this element, else an empty array
+ * @return this construct's annotations for the specified annotation
+ * type if present on this construct, else an empty array
*
* @see #getAnnotationMirrors()
* @see #getAnnotation(java.lang.Class)
--- a/langtools/src/share/classes/javax/lang/model/util/Elements.java Wed May 22 09:59:05 2013 -0700
+++ b/langtools/src/share/classes/javax/lang/model/util/Elements.java Wed May 22 13:34:03 2013 -0700
@@ -143,12 +143,13 @@
List<? extends Element> getAllMembers(TypeElement type);
/**
- * Returns all annotations of an element, whether
- * inherited or directly present.
+ * Returns all annotations <i>present</i> on an element, whether
+ * directly present or present via inheritance.
*
* @param e the element being examined
* @return all annotations of the element
* @see Element#getAnnotationMirrors
+ * @see javax.lang.model.AnnotatedConstruct
*/
List<? extends AnnotationMirror> getAllAnnotationMirrors(Element e);