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diff --git a/docs/release/README-1.8.2.adoc b/docs/release/README-1.8.2.adoc new file mode 100644 index 000000000..a49213617 --- /dev/null +++ b/docs/release/README-1.8.2.adoc @@ -0,0 +1,162 @@ +== AspectJ 1.8.2 + +_© Copyright 2014 Contributors. All rights reserved._ + +The full list of resolved issues in 1.8.2 is available +https://bugs.eclipse.org/bugs/buglist.cgi?query_format=advanced;bug_status=RESOLVED;bug_status=VERIFIED;bug_status=CLOSED;product=AspectJ;target_milestone=1.8.2;[here] + +_Release info: 1.8.2 available 14-Aug-2014_ + +=== Notable changes + +Although only a few bugs have been fixed here, they are quite important +ones: + +==== Update to more recent Eclipse Compiler + +AspectJ is now based on a more up to date Eclipse compiler level (git +hash 2b07958) so includes all the latest fixes + +==== Correct handling of RuntimeInvisibleTypeAnnotations (type annotations without runtime visibility) + +For anyone weaving code containing these kind of type annotations, this +is an important fix. Although AspectJ does not currently support +pointcuts matching on these kinds of annotation it was crashing when +they were encountered. That is now fixed. + +==== Annotation processing + +A very long standing issue, the AspectJ compiler now supports annotation +processors thanks to some work by Sergey Stupin. + +Here is a short example, a very basic annotation and application: + +===== Marker.java + +[source, java] +.... +import java.lang.annotation.Retention; +import java.lang.annotation.RetentionPolicy; + +@Retention(RetentionPolicy.RUNTIME) +public @interface Marker { } +.... + +===== Code.java + +[source, java] +.... +public class Code { + + public static void main(String []argv) { + new Code().moo(); + new Code().boo(); + new Code().too(); + new Code().woo(); + } + + public void moo() {} + + @Marker + public void boo() {} + + @Marker + public void too() {} + + public void woo() {} +} +.... + +And now a basic annotation processor. This processor will find methods +in the source marked with the annotation Marker and for each one +generate an aspect tailored to advising that method (this *is* a +contrived demo!) + +===== DemoProcessor.java + +[source, java] +.... +import java.io.*; +import javax.tools.*; +import java.util.*; +import javax.annotation.processing.*; +import javax.lang.model.*; +import javax.lang.model.element.*; + +@SupportedAnnotationTypes(value= {"*"}) +@SupportedSourceVersion(SourceVersion.RELEASE_6) +public class DemoProcessor extends AbstractProcessor { + + private Filer filer; + + @Override + public void init(ProcessingEnvironment env) { + filer = env.getFiler(); + } + + @Override + public boolean process(Set elements, RoundEnvironment env) { + // Discover anything marked with @Marker + for (Element element: env.getElementsAnnotatedWith(Marker.class)) { + if (element.getKind() == ElementKind.METHOD) { + // For any methods we find, create an aspect: + String methodName = element.getSimpleName().toString(); + String aspectText = + "public aspect Advise_"+methodName+" {\n"+ + " before(): execution(* "+methodName+"(..)) {\n"+ + " System.out.println(\""+methodName+" running\");\n"+ + " }\n"+ + "}\n"; + try { + JavaFileObject file = filer.createSourceFile("Advise_"+methodName, element); + file.openWriter().append(aspectText).close(); + System.out.println("Generated aspect to advise "+element.getSimpleName()); + } catch (IOException ioe) { + // already creates message can appear if processor runs more than once + if (!ioe.getMessage().contains("already created")) { + ioe.printStackTrace(); + } + } + } + } + return true; + } +} +.... + +With those sources, we compile the processor: + +[source, text] +.... +ajc -1.6 DemoProcessor.java Marker.java +.... + +Now compile the code with the processor specified: + +[source, text] +.... +ajc -1.6 -processor DemoProcessor -showWeaveInfo Code.java Marker.java +.... + +[source, text] +.... +Generated aspect to advise too +Generated aspect to advise boo +Join point 'method-execution(void Code.boo())' in Type 'Code' (Code.java:14) advised by before advice from 'Advise_boo' (Advise_boo.java:2) +Join point 'method-execution(void Code.too())' in Type 'Code' (Code.java:17) advised by before advice from 'Advise_too' (Advise_too.java:2) +.... + +Notice the processor generates the aspects and then they are woven into +the code being compiled immediately. + +Finally we can run it: + +[source, text] +.... +java Code +boo running +too running +.... + +*Note:* There is still work to be done to get annotation processors +behaving under AJDT. |