ValidateAction.runValidation((View) document.getContent());

public class MyHandler extends AbstractHandler {
  @Override
  public Object execute(ExecutionEvent event) throws ExecutionException {
    IFile selectedFile = ...;
    fileURI = selectedFile.getLocationURI().toString();
    // TODO validate model here
    // open a SaveAs dialog for the target file
    ...
    // run a wizard to ask the user for some transformation parameters
    ...
    // run the transformation
    ETLExecutor executor = new ETLExecutor(MODEL_NAME, ETL_SCRIPT_LOCATION);
    ...
    executor.execute();
  }
}

EmfModel model = EmfModelFactory.getInstance().loadEmfModel(MODEL_NAME, file, MODEL_NS, AccessMode.READ_ONLY);