[aspectj-dev] AspectJ AST Manibulation - advice and pointcut

[Fatima <faa359@xxxxxxxxxxxxx>]

Hi there, 

I am a grad student at the University of Saskatchewan working under the supervision of professor Christopher Dutchyn. My  research project is to build a plugin to refactor Java into AspectJ. 

I have been trying to create an aspect by manipulating the ast that I got by parsing a string and then get the compilation unit from the parser. This is my code down 

String doc = "package " + 
                pkgFragment.getElementName() + 
                ";" +
                "\n\n";

parser = org.aspectj.org.eclipse.jdt.core.dom.ASTParser.newParser(org.aspectj.org.eclipse.jdt.core.dom.AST.JLS3); parser.setKind(org.aspectj.org.eclipse.jdt.core.dom.ASTParser.K_COMPILATION_UNIT);
parser.setSource(helloWorld.toCharArray());
parser.setCompilerOptions(new HashMap<String,String>());
parser.setUnitName(aspectName);
parser.setResolveBindings(true);
parser.setBindingsRecovery(true);

unit =  ((org.aspectj.org.eclipse.jdt.core.dom.CompilationUnit) parser.createAST(null));
ast =  (AjAST) unit.getAST();
document = new Document(aspectCode);
AjTypeDeclaration ajtype = ast.newAjTypeDeclaration();
ajtype.setName(ast.newSimpleName(aspectName));
ajtype.modifiers().add(ast.newModifier(org.aspectj.org.eclipse.jdt.core.dom.Modifier.ModifierKeyword.PUBLIC_KEYWORD));
ajtype.setAspect(true);

org.aspectj.org.eclipse.jdt.core.dom.MethodDeclaration method = ast.newMethodDeclaration();
        method.modifiers().add(ast.newModifier(org.aspectj.org.eclipse.jdt.core.dom.Modifier.ModifierKeyword.PUBLIC_KEYWORD));
method.setName(ast.newSimpleName(name));
method.setReturnType2(null);
method.setBody(ast.newBlock());

PointcutDeclaration pointcut =  ast.newPointcutDeclaration();
pointcut.setName(ast.newSimpleName(pointcutName));        pointcut.modifiers().add(ast.newModifier(org.aspectj.org.eclipse.jdt.core.dom.Modifier.ModifierKeyword.ABSTRACT_KEYWORD));

//add method to ajtype body
ajtype.bodyDeclarations().add(methodOne);
        
 //add pointcut to ajtype body
 System.out.println("adding pcut: " + ajtype.bodyDeclarations().add(pointcut));
         
org.aspectj.org.eclipse.jdt.core.dom.rewrite.ASTRewrite rewriter = ASTRewrite.create(ast); org.aspectj.org.eclipse.jdt.core.dom.rewrite.ListRewrite lrw = rewriter.getListRewrite((org.aspectj.org.eclipse.jdt.core.dom.ASTNode) unit,
                                                                                org.aspectj.org.eclipse.jdt.core.dom.CompilationUnit.TYPES_PROPERTY);
lrw.insertLast(ajtype, null);
TextEdit edits = rewriter.rewriteAST(document, new HashMap<String,String>());
        try {
            edits.apply(document);
        } catch (MalformedTreeException e) {
            e.printStackTrace();
        }


printing the content of the document after editing results in this:

package observer;

public class AspectOfsetX { public void methodOne(){
    }
 }

without the pointcut being applied to the document but it is actually added to the AST because System.out.println(ajtype.bodyDeclarations().add(pointcut)) prints true. Also, I am expexting the result of this should be an aspect not a class.


The parser gives me this warning 
Warning: AspectJ type declaration factory class not found on classpath

I have tried to add a pointcut and an advice to the body declaration of the ajTypeDeclaration and also I tried with AspectDeclaration but get no luck with both, only method declaration get added. what is it that I am doing wrong? Please point me to the correct way of doing this.

Fatima,