Changing the default file filter in

I am creating a NetBeans-Platform-based "viewer" application that supports several custom file formats. I'm wondering if it's possible to change the default "Open File..." dialog to select a filter other than "All Files" by default.

Here is the code that builds the FileChooser: http://hg.netbeans.org/main/file/c7b8745b5c39/utilities/src/org/netbeans/modules/openfile/OpenFileAction.java#l103

I found a workaround that sets OpenFileAction.currentFileFilter field via reflection, but it feels very fragile and hacky:


Code:
import java.lang.reflect.Field;
import java.util.Arrays;
import javax.swing.filechooser.FileFilter;
import org.openide.filesystems.*;
import org.openide.modules.ModuleInstall;
import org.openide.util.Exceptions;
import org.openide.util.Lookup;

public class Installer extends ModuleInstall {

  @Override
  public void restored() {
    // Sets the default file filter of "Open File" dialog to "PDF Documents", instead of "All Files"
    try {
      // Find the description of the FileFilter generated for PdfDataObject
      FileChooserBuilder fcb = new FileChooserBuilder(Installer.class);
      fcb.addDefaultFileFilters();
      FileFilter filter = Arrays.stream(fcb.createFileChooser().getChoosableFileFilters())
          .filter(f -> f.getDescription().contains("pdf"))
          .findFirst()
          .get();
      String pdfFilterDescription = filter.getDescription();

      // Set the currentFileFilter field of the OpenFileAction class
      ClassLoader gcl = Lookup.getDefault().lookup(ClassLoader.class);
      Class<?> ofaClass = gcl.loadClass("org.netbeans.modules.openfile.OpenFileAction");
      Field cffField = ofaClass.getDeclaredField("currentFileFilter");
      cffField.setAccessible(true);
      cffField.set(null, pdfFilterDescription);

    } catch (Exception ex) {
      Exceptions.printStackTrace(ex);
    }
  }
}




Unfortunately I cannot find any sensible way to extend OpenFileAction without reflection.  Can anyone think of a better way to accomplish this behavior?