m2 info!

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@@ -20,7 +20,129 @@ All rights reserved.
 
 <h1>AspectJ v1.6.0 Readme</h1>
 
-<h4>AspectJ v1.6.0M1 - 16 Jan 2008</h4>
+<h3>AspectJ v1.6.0M2 - 26 Feb 2008</h3>
+<p>This milestone fixes a number of issues raised against M1 and earlier versions of AspectJ.  The full list of fixes
+is accessible here:
+<a href="https://bugs.eclipse.org/bugs/buglist.cgi?query_format=advanced&short_desc_type=allwordssubstr&short_desc=&product=AspectJ&target_milestone=1.6.0+M2&long_desc_type=allwordssubstr&long_desc=&bug_file_loc_type=allwordssubstr&bug_file_loc=&status_whiteboard_type=allwordssubstr&status_whiteboard=&keywords_type=allwords&keywords=&bug_status=RESOLVED&bug_status=VERIFIED&bug_status=CLOSED&emailtype1=substring&email1=&emailtype2=substring&email2=&bugidtype=include&bug_id=&votes=&chfieldfrom=&chfieldto=Now&chfieldvalue=&cmdtype=doit&order=Reuse+same+sort+as+last+time&field0-0-0=noop&type0-0-0=noop&value0-0-0=">1.6.0m2 fixes</a>.
+
+<p>1.6.0m2 includes two new features:
+<ul>
+<li>Parameter annotation matching</li>
+<li>Annotation value matching</li>
+</ul>
+<p></p>
+<h4>Parameter Annotation Matching</h4>
+<p>Parameter matching is possible for constructors and methods.  The use
+of parentheses around the parameter types in a method signature
+determine whether the annotations relate to the type of the parameter
+or the parameter itself.
+
+<pre><code>
+execution(* *(@A *));
+</code></pre>
+<p>- Execution of a method/ctor whose first parameter is of a type
+annotated with @A.
+
+<pre><code>
+execution(* *(@A (*)));
+</code></pre>
+<p>- Execution of a method/ctor whose first parameter is annotated with @A
+
+<pre><code>
+execution(* *(@A (@B *)))
+</code></pre>
+<p>- Execution of a method/ctor whose first parameter is annotated with
+@A and is of a type annotated with @B.
+
+Example:
+<pre><code>
+------ Start of Test.java -----
+@interface A {}
+@interface B {}
+
+class C {
+ public void foo(@A String s) {}
+ public void goo(@A @B String s) {}
+}
+
+aspect X {
+ before(): execution(* *(@A (*))) {}
+ before(): execution(* *(@B (*))) {}
+}
+------ End of Test.java -----
+$ ajc -showWeaveInfo -1.6 Test.java
+Join point 'method-execution(void C.foo(java.lang.String))' in Type 'C' (A.java:5) advised by before advice from 'X' (A.java:10)
+
+Join point 'method-execution(void C.goo(java.lang.String))' in Type 'C' (A.java:6) advised by before advice from 'X' (A.java:11)
+
+Join point 'method-execution(void C.goo(java.lang.String))' in Type 'C' (A.java:6) advised by before advice from 'X' (A.java:10)
+</code></pre>
+<p>The first piece of advice matched both methods.  The second only matched goo().
+<br><br>
+<h4>Annotation Value Matching</h4>
+
+<p>This allows static matching of the values of an annotation - if the matching is done statically at weave time, it is possible
+to avoid some of the reflection that is currently required within the advice (in some cases).  A typical use case is tracing where
+the trace level is defined by an annotation but may be switched OFF for a method if the annotation has a particular value.  Perhaps
+tracing has been turned on at the type level and a few critical methods should not get traced.  Here is some code showing the
+use case:
+<p>
+
+<pre><code>
+enum TraceLevel { NONE, LEVEL1, LEVEL2, LEVEL3 }
+
+@interface Trace {
+  TraceLevel value() default TraceLevel.LEVEL1;
+}
+  
+aspect X {
+  // Advise all methods marked @Trace except those with a tracelevel of none
+  before(): execution(@Trace !@Trace(TraceLevel.NONE) * *(..)) {
+    System.err.println("tracing "+thisJoinPoint);
+  }
+}
+
+public class ExampleOne {
+
+  public static void main(String[] args) {
+    ExampleOne eOne = new ExampleOne();
+    eOne.m001();
+    eOne.m002();
+    eOne.m003();
+    eOne.m004();
+    eOne.m005();
+    eOne.m006();
+    eOne.m007();
+  }
+
+  @Trace(TraceLevel.NONE)
+  public void m001() {}
+
+  @Trace(TraceLevel.LEVEL2)
+  public void m002() {} // gets advised
+
+  @Trace(TraceLevel.LEVEL3)
+  public void m003() {} // gets advised
+
+  @Trace(TraceLevel.NONE)
+  public void m004() {}
+
+  @Trace(TraceLevel.LEVEL2)
+  public void m005() {} // gets advised
+
+  @Trace(TraceLevel.NONE)
+  public void m006() {}
+
+  @Trace
+  public void m007() {} // gets advised
+
+}
+</pre></code>
+Matching is currently allowed on all annotation value types *except* class and array. Also it is
+not currently supported for parameter annotation values.
+
+<hr>
+<h3>AspectJ v1.6.0M1 - 16 Jan 2008</h3>
 <p>This is the first milestone release of AspectJ 6.  AspectJ 6 is a Java 6 compiler,
 the underlying Eclipse JDT compiler version upon which it is based is 785_R33x - a recent 3.3 version.</p>
 <p>The compiler had changed a lot since version 574_R31x when we last merged!