Question

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!

Answer 1

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…