Developer’s guide to building methods in addition to AJDT and AspectJ

Developer’s guide to building methods in addition to AJDT and AspectJ

This page is intended to help individuals developing technology to give or make use of AJDT/AspectJ. Please contribute to this site with any pertinent suggestions, eg example laws by using the AJDT and/or AspectJ APIs.

These pages is out of date. Our very own goal is upgrade these pages for AJDT 1.6.1, but we have maybe not had time for this yet. Kindly understand that some of what is with this webpage might no lengthier become proper. When you have any queries, be sure to submit these to the mailing list ajdt-dev.


  • 1 Obtaining crosscutting connection facts from AJDT
  • 2 Collection Devices in AJDT
    • 2.1 obtaining contents of an AJCompilationUnit
  • 3 Using the AspectJ AST parser
  • 4 recognized limitations, insects, and outstanding issues
  • 5 The screen apparatus are expected to utilize to push the AspectJ compiler

Getting crosscutting partnership suggestions from AJDT

In case you are developing an eclipse plugin and call for use of crosscutting suggestions whenever a task is made, you can easily register a listener with AJDT. Their plug-in should rely on org.eclipse.ajdt.core, org.eclipse.core.resources and org.eclipse.jdt.core, and org.aspectj.weaver. For the org.eclipse.ajdt.core plug-in there clearly was an IAdviceChangedListener program with an individual adviceChanged() way.

Enter this making use of the AJBuilder lessons along these lines (within plug-in’s start() way for instance):

Presently (AJDT 1.6) it is also known as after every acquire of an AspectJ task (i.e. every *potential* information modification). In another release this may be enhanced becoming best also known as if pointers provides actually altered. AJDT/UI utilizes this system to revise the lime arrow image decorator.

Crosscutting ideas can then feel extracted from the AJProjectModelFacade lessons. Here is a good example with many pseudo-code you’ll be able to adapt:

Several records about that:

  1. The API possess some lesser alterations in tomorrow. Be sure to deliver an email with the ajdt-dev mailing list if any such thing about this webpage may be out of time.
  2. The AJProjectModelFacade item was a lightweight entrance inside AspectJ industry. It can be good till the after that build. Very, never shop all of them. Make use of them and dispose as needed.
  3. AJProjectModelFacade items only incorporate data following earliest profitable build. Possible phone the possessModel() method to find out if an AspectJ design is out there when it comes down to project.
  4. As you can plainly see, obtain the relationship in both instructions. See AJRelationshipManager for your full list of relations, so you’re able to only ask for the connection types you find attractive.
  5. IRelationship.getSourceHandle() and IRelationship.getgoals() return chain that signify AspectJ element handles. You can use the next AJProjectModelFacade techniques to convert to model characteristics:
    • toProgramElement(String) — profits IProgramElement. From this point possible obtain information about the pointcut, intertype factor, or declare component.
    • programElementToJavaElement(sequence) or programElementToJavaElement(IProgramElement) — comes back IJavaElement. From here you can hook into JDT tooling.
  6. There is no necessity to register an information changed listener. You can aquire access to the crosscutting unit at any time (assuming that the project has already established an effective build) making use of the next rule:

Collection Models in AJDT

JDT creates compilation products (instances of ICompilationdevice) for .java files. AJDT creates collection units for .aj documents, which have been cases of AJCompilationUnit (which implements ICompilationUnit). The category AJCompilationUnitManager (into the org.eclipse.ajdt.core plug-in) consists of some useful methods concerning this, eg:

From an AJCompilationUnit you can acquire various structural suggestions including getAllTypes(). The principal sort for “.aj” files is normally a piece, basically displayed by the AspectElement lessons, containing aspect-specific techniques such as for instance getPointcuts() and getAdvice(). These return furthermore aspect-specific items such PointcutElement and AdviceElement.

Since AJDT 1.6.2 for Eclispe 3.4, we use the Eclipse weaving solution to weave into JDT. One group of join things that are instructed are those linked to the production of CompilationUnit items. In the event the document features is actually *.aj file, AJCompilationUnit is established in place of a general Java collectiondevice.

Obtaining the belongings in an AJCompilationUnit

Because JDT anticipates that every source it functions with is true Java code, JDT doesn’t work really with AspectJ. To get around this, AJCompilationUnits manage two buffers which contain provider articles. The first is a java appropriate buffer in addition to 2nd is the initial information buffer. The coffee appropriate buffer will be the buffer that’s came back by default whenever AJCompilationUnit.getContents() is called. This buffer offers the AspectJ rule along with aspect-specific syntax removed down. The initial content buffer contains (because would expect) the initial content of file.

For instance in the event the initial contents buffer seems like:

the coffee suitable buffer is

Observe that the source areas of identifiers are exactly the same in both buffers. This ensures that guide choosing and hyperlinking really works needlessly to say.

Should you decide require dealing with the original content material of an AspectJ CompilationUnit ajdevice, you can do the following:

Just what this method really does wants the AJCU to temporarily switch the buffer towards AJ buffer from the coffee buffer. It’s always best to do that in a synchronized block so that you you should not exposure other posts coming by and accidentally utilising the completely wrong buffer (AJDT it self does not caribbean cupid reddit need a synchronized block because of this, nevertheless should).

By using the AspectJ AST parser

Important sample, extracted from bug 88861

Make the above mentioned and operated they:

Identified restrictions, bugs, and outstanding issues

Limitation: there was at this time no AST support for resolving kind bindings: insect 146528

Leave a comment

Your email address will not be published.