Eclipse JDT: Call 'correct indentation' programmatically?

I am working on an Eclipse plugin that modifies Java code in a user's project.

Basically the result of this plugin is that Java annotations are added to some methods, so

void foo() { ... }

becomes

@MyAnnotation
void foo() { ... }

Except that it doesn't quite look like that; the indentation on the newly inserted annotation is wack (specifically, the new annotation is all the way to the left-hand side of the line). I'd like to make all my changes to the file, and then programmatically call "Correct Indentation."

Does anyone know how to do this? I can't find the answer here or in the JDT forums, and all the classes that look relevant (IndentAction, JavaIndenter) are in internal packages which I'm not supposed to use...

Thanks!

Solution

Well I think I may have figured out the solution I want. Guess I should have spend more time searching before asking... but for future reference, here's what I did! The good stuff was in the ToolFactory...

import org.eclipse.jdt.core.ToolFactory;
import org.eclipse.jdt.core.formatter.CodeFormatter;
import org.eclipse.jdt.core.ISourceRange;
import org.eclipse.text.edits.TextEdit;
import org.eclipse.jdt.core.ICompilationUnit;

...

ICompilationUnit cu = ...

...

CodeFormatter formatter = ToolFactory.createCodeFormatter(null);
ISourceRange range = cu.getSourceRange();
TextEdit indent_edit =
  formatter.format(CodeFormatter.K_COMPILATION_UNIT, 
    cu.getSource(), range.getOffset(), range.getLength(), 0, null);
cu.applyTextEdit(indent_edit, null);

cu.reconcile();

This reformats the entire file. There are other options if you need to reformat less...