/**
 * Return an IType (Source type, not Binary) for the given class name.
 * 
 * @return null if no such class can be found.
 * @throws JavaModelException
 */
public static IType findType(IJavaProject javaProject, final String className) 
throws JavaModelException 
{
    String primaryName= className;
    int i= primaryName.lastIndexOf('$');
    int occurence= 0;
    if (0 < i) {
        try {
            occurence= Integer.parseInt(primaryName.substring(i+1));
            primaryName= primaryName.substring(0, i);
        }
        catch (NumberFormatException x) {
        }
    }
    
    /*
     * IJavaProject.findType works for top level classes and named inner 
     * classes, but not for anonymous inner classes
     */
    IType primaryType= javaProject.findType(primaryName);
    if (!primaryType.exists())
        return null;
    if (occurence <= 0) // if not anonymous then we done
        return primaryType;

    /*
     * the following snippet never works, but according to the 
     * docs it should.  
     */
    IType innrType= primaryType.getType("", occurence);
    if (innrType != null) {
        String name= primaryType.getFullyQualifiedName();
        if (name.equals(className)) {
            return innrType;
        }
    }

    /*
     * If we're looking for an anonymous inner class then we need to look 
     * through the primary type for it. 
     */
    LinkedList<IJavaElement> todo= new LinkedList<IJavaElement>();
    todo.add(primaryType);
    IType innerType= null;
    while (!todo.isEmpty()) {
        IJavaElement element= todo.removeFirst();

        if (element instanceof IType) {
            IType type= (IType)element;
            String name= type.getFullyQualifiedName();
            if (name.equals(className)) {
                innerType= type;
                break;
            }
        }

        if (element instanceof IParent) {
            for (IJavaElement child:((IParent)element).getChildren()) {
                todo.add(child);
            }
        }
    }

    return innerType;
}