#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;

#parse("File Header.java")
public class ${NAME} extends Fragment {
    
  private static final String FRAG_TAG = ${NAME}.class.getCanonicalName();
  
  public interface ${PARENT_INTERFACE} {
    //TODO: define methods for parent interface
  }

  public static <ParentFrag extends Fragment & ${PARENT_INTERFACE}> ${NAME} attach(ParentFrag parent) {
    return attach(parent.getChildFragmentManager());
  }

  public static <ParentActivity extends Activity & ${PARENT_INTERFACE}> ${NAME} attach(ParentActivity parent) {
    return attach(parent.getFragmentManager());
  }

  private static ${NAME} attach(FragmentManager fragmentManager) {
    ${NAME} frag = (${NAME}) fragmentManager.findFragmentByTag(FRAG_TAG);
    if (frag == null) {
      frag = new ${NAME}();
      fragmentManager.beginTransaction().add(frag, FRAG_TAG).commit();
    }
    return frag;
  }

  private ${PARENT_INTERFACE} getParent() {
    Fragment parentFragment = getParentFragment();
    if (parentFragment instanceof ${PARENT_INTERFACE}) {
      return (${PARENT_INTERFACE}) parentFragment;
    } else {
      Activity activity = getActivity();
      if (activity instanceof ${PARENT_INTERFACE}) {
        return (${PARENT_INTERFACE}) activity;
      }
    }
    return null;
  }
}