Array initializer supports and better annotation supports.

git-svn-id: http://anonsvn.jboss.org/repos/javassist/trunk@196 30ef5769-5b8d-40dd-aea6-55b5d6557bb3

1 files changed, 67 insertions, 4 deletions

diff --git a/tutorial/tutorial2.html b/tutorial/tutorial2.html
index 5befd301..31df6720 100644
--- a/tutorial/tutorial2.html
+++ b/tutorial/tutorial2.html
@@ -19,6 +19,7 @@
 <br><li><a href="#alter">Altering a method body</a>
 <br><li><a href="#add">Adding a new method or field</a>
 <br><li><a href="#runtime">Runtime support classes</a>
+<br><li><a href="#annotation">Annotations</a>
 <br><li><a href="#import">Import</a>
 <br><li><a href="#limit">Limitations</a>
 </ul>
@@ -1440,11 +1441,73 @@ or <code>removeMethod()</code> in <code>CtClass</code>.  A
 <code>CtConstructor</code> can be removed by <code>removeConstructor()</code>
 in <code>CtClass</code>.
 
+<p><br>
+
+<a name="annotation">
+<h3>4.4 Annotations</h3>
+
+<p><code>CtClass</code>, <code>CtMethod</code>, <code>CtField</code>
+and <code>CtConstructor</code> provides a convenient method
+<code>getAnnotations()</code> for reading annotations.
+It returns an annotation-type object.
+
+<p>For example, suppose the following annotation:
+
+<ul><pre>
+public @interface Author {
+    String name();
+    int year();
+}
+</pre></ul>
+
+<p>This annotation is used as the following:
+
+<ul><pre>
+@Author(name="Chiba", year=2005)
+public class Point {
+    int x, y;
+}
+</pre></ul>
+
+<p>Then, the value of the annotation can be obtained by
+<code>getAnnotations()</code>.
+It returns an array containing
+annotation-type objects.
+
+<ul><pre>
+CtClass cc = ClassPool.getDefault().get("Point");
+Object[] all = cc.getAnnotations();
+Author a = (Author)all[0];
+String name = a.name();
+int year = a.year();
+System.out.println("name: " + name + ", year: " + year);
+</pre></ul>
+
+<p>This code snippet should print:
+
+<ul><pre>
+name: Chiba, year: 2005
+</pre></ul>
+
+<p>
+Since the annoation of <code>Point</code> is only <code>@Author</code>,
+the length of the array <code>all</code> is one
+and <code>all[0]</code> is an <code>Author</code> object.
+The member values of the annotation can be obtained
+by calling <code>name()</code> and <code>year()</code>
+on the <code>Author</code> object.
+
+<p>To use <code>getAnnotations()</code>, annotation types
+such as <code>Author</code> must be included in the current
+class path.  <em>They must be also accessible from a
+<code>ClassPool</code> object.</em>  If the class file of an annotation
+type is not found, Javassist cannot obtain the default values
+of the members of that annotation type.
 
 <p><br>
 
 <a name="runtime">
-<h3>4.4 Runtime support classes</h3>
+<h3>4.5 Runtime support classes</h3>
 
 <p>In most cases, a class modified by Javassist does not require
 Javassist to run.  However, some kinds of bytecode generated by the
@@ -1458,7 +1521,7 @@ Javassist classes are never used at runtime of the modified classes.
 <p><br>
 
 <a name="import">
-<h3>4.5 Import</h3>
+<h3>4.6 Import</h3>
 
 <p>All the class names in source code must be fully qualified
 (they must include package names).
@@ -1494,7 +1557,7 @@ must be always a fully qualified name.
 <p><br>
 
 <a name="limit">
-<h3>4.6 Limitations</h3>
+<h3>4.7 Limitations</h3>
 
 <p>In the current implementation, the Java compiler included in Javassist
 has several limitations with respect to the language that the compiler can
@@ -1507,7 +1570,7 @@ See the <code>javassist.bytecode.annotation</code> package.
 
 <p><li>Array initializers, a comma-separated list of expressions
 enclosed by braces <code>{</code> and <code>}</code>, are not
-supported.
+available unless the array dimension is one.
 
 <p><li>Inner classes or anonymous classes are not supported.