Using Extract Method Action from a plugin

Question

I'm just starting out developing eclipse plugins so forgive me if this is an easy question, but I am developing a plugin in which the first step consists of analysing the source code of a Java application and Extract new Methods.

My plugin determines the sequence of statements to be extracted. I want to use ExtractMethodAction (http://help.eclipse.org/neon/index.jsp?topic=%2Forg.eclipse.jdt.doc.isv%2Freference%2Fapi%2Forg%2Feclipse%2Fjdt%2Fui%2Factions%2Fpackage-summary.html).

Note that, my plugin recover a sequence of statements (http://help.eclipse.org/neon/index.jsp?topic=%2Forg.eclipse.jdt.doc.isv%2Freference%2Fapi%2Forg%2Feclipse%2Fjdt%2Fcore%2Fdom%2FStatement.html) and not an ITextSelection which is the parameter of the method run of the class ExtractMethodAction. Moreover, the constructor of ExtractMethodAction has as a parameter JavaEditor and I do not know how to create a JavaEditor for an ICompilationUnit.

This is a part of the method execute of my plugin:

public Object execute(ExecutionEvent event) throws ExecutionException {


    IWorkspace workspace= ResourcesPlugin.getWorkspace();
    IWorkspaceRoot root = workspace.getRoot();

    IProject [] projects = root.getProjects();
    for(IProject project: projects){


        IJavaProject javaProject = JavaCore.create(project); 
        try {

            IPackageFragment [] packages =javaProject.getPackageFragments();

            for (IPackageFragment mypackage: packages){


                if (mypackage.getKind() == IPackageFragmentRoot.K_SOURCE){


                    ICompilationUnit[] units =  mypackage.getCompilationUnits();
                    for (ICompilationUnit unit: units){

                        Parser myparser = new Parser();
                        CompilationUnit cu=  myparser.parse(unit);
                        ...

                    }   

                }           
           }

and this is how I tried to use ExtractMethodAction:

JavaEditor edit;
ExtractMethodAction act= new ExtractMethodAction(edit);
ITextSelection select;
act.run(select);

Note that I did not know how to initialise the JavaEditor and the ITextSelection .

Can you help me please to use ExtractMethodAction if possible or tell me if it would be better to devellope my own code. Thank you very much.