final RefactoringStatus status = new RefactoringStatus();
try {
monitor.beginTask(Messages.ConvertConstantsToEnumRefactoring_CheckingPreconditions, 2);
final IJavaSearchScope scope = SearchEngine.createWorkspaceScope();
this.computer = new EnumerizationComputer(this.fieldsToRefactor,
scope, monitor);
// build the enumerization forest.
/*
* TODO: Will treat this as a 'blackbox' for now. For more details