How to use

GenerateToStringDialog$GenerateToStringContentProvider

in

org.eclipse.jdt.internal.ui.dialogs

public GenerateToStringDialog(Shell shell, CompilationUnitEditor editor, IType type, IVariableBinding[] fields, IVariableBinding[] inheritedFields, IVariableBinding[] selectedFields,
    IMethodBinding[] methods, IMethodBinding[] inheritededMethods) throws JavaModelException {
  super(shell, new BindingLabelProvider(), new GenerateToStringContentProvider(fields, inheritedFields, methods, inheritededMethods), editor, type, false);
  setEmptyListMessage(JavaUIMessages.GenerateHashCodeEqualsDialog_no_entries);
  List<Object> selected= new ArrayList<Object>(Arrays.asList(selectedFields));
  if (selectedFields.length == fields.length && selectedFields.length > 0)
    selected.add(getContentProvider().getParent(selectedFields[0]));
  setInitialElementSelections(selected);
  setTitle(JavaUIMessages.GenerateToStringDialog_dialog_title);
  setMessage(JavaUIMessages.GenerateToStringDialog_select_fields_to_include);
  setValidator(new GenerateToStringValidator(fields.length + inheritedFields.length, methods.length + inheritededMethods.length));
  setSize(60, 18);
  setInput(new Object());
  fGenerationSettings= new ToStringGenerationSettings(getDialogSettings());
}

@Override
public void selectionChanged(SelectionChangedEvent event) {
  IStructuredSelection selection= (IStructuredSelection)getTreeViewer().getSelection();
  Object selected= selection.size() > 0 ? selection.toList().get(0) : null;
  GenerateToStringContentProvider cp= (GenerateToStringContentProvider)getContentProvider();
  fButtonControls[UP_INDEX].setEnabled(cp.canMoveUp(selected));
  fButtonControls[DOWN_INDEX].setEnabled(cp.canMoveDown(selected));
}

@Override
protected void buttonPressed(int buttonId) {
  super.buttonPressed(buttonId);
  switch (buttonId) {
    case UP_BUTTON: {
      GenerateToStringContentProvider contentProvider= (GenerateToStringContentProvider)getTreeViewer().getContentProvider();
      List<?> selection= ((IStructuredSelection)getTreeViewer().getSelection()).toList();
      if (selection.size() > 0)
        contentProvider.up(selection.get(0), getTreeViewer());
      updateOKStatus();
      break;
    }
    case DOWN_BUTTON: {
      GenerateToStringContentProvider contentProvider= (GenerateToStringContentProvider)getTreeViewer().getContentProvider();
      List<?> selection= ((IStructuredSelection)getTreeViewer().getSelection()).toList();
      if (selection.size() > 0)
        contentProvider.down(selection.get(0), getTreeViewer());
      updateOKStatus();
      break;
    }
    case SORT_BUTTON: {
      GenerateToStringContentProvider contentProvider= (GenerateToStringContentProvider)getTreeViewer().getContentProvider();
      contentProvider.sort();
      getTreeViewer().refresh();
      updateOKStatus();
      break;
    }
  }
}

@Override
protected void buttonPressed(int buttonId) {
  super.buttonPressed(buttonId);
  switch (buttonId) {
    case UP_BUTTON: {
      GenerateToStringContentProvider contentProvider= (GenerateToStringContentProvider)getTreeViewer().getContentProvider();
      List<?> selection= ((IStructuredSelection)getTreeViewer().getSelection()).toList();
      if (selection.size() > 0)
        contentProvider.up(selection.get(0), getTreeViewer());
      updateOKStatus();
      break;
    }
    case DOWN_BUTTON: {
      GenerateToStringContentProvider contentProvider= (GenerateToStringContentProvider)getTreeViewer().getContentProvider();
      List<?> selection= ((IStructuredSelection)getTreeViewer().getSelection()).toList();
      if (selection.size() > 0)
        contentProvider.down(selection.get(0), getTreeViewer());
      updateOKStatus();
      break;
    }
    case SORT_BUTTON: {
      GenerateToStringContentProvider contentProvider= (GenerateToStringContentProvider)getTreeViewer().getContentProvider();
      contentProvider.sort();
      getTreeViewer().refresh();
      updateOKStatus();
      break;
    }
  }
}

private Object[] getContainingArray(Object element) {
  if (element instanceof String)
    return mainNodes;
  if (element instanceof IVariableBinding) {
    if (getElementPosition(element, fFields) >= 0)
      return fFields;
    if (getElementPosition(element, fInheritedFields) >= 0)
      return fInheritedFields;
  }
  if (element instanceof IMethodBinding) {
    if (getElementPosition(element, fMethods) >= 0)
      return fMethods;
    if (getElementPosition(element, fInheritedMethods) >= 0)
      return fInheritedMethods;
  }
  return EMPTY;
}

private Object[] getContainingArray(Object element) {
  if (element instanceof String)
    return mainNodes;
  if (element instanceof IVariableBinding) {
    if (getElementPosition(element, fFields) >= 0)
      return fFields;
    if (getElementPosition(element, fInheritedFields) >= 0)
      return fInheritedFields;
  }
  if (element instanceof IMethodBinding) {
    if (getElementPosition(element, fMethods) >= 0)
      return fMethods;
    if (getElementPosition(element, fInheritedMethods) >= 0)
      return fInheritedMethods;
  }
  return EMPTY;
}

public GenerateToStringDialog(Shell shell, CompilationUnitEditor editor, IType type, IVariableBinding[] fields, IVariableBinding[] inheritedFields, IVariableBinding[] selectedFields,
    IMethodBinding[] methods, IMethodBinding[] inheritededMethods) throws JavaModelException {
  super(shell, new BindingLabelProvider(), new GenerateToStringContentProvider(fields, inheritedFields, methods, inheritededMethods), editor, type, false);
  setEmptyListMessage(JavaUIMessages.GenerateHashCodeEqualsDialog_no_entries);
  List<Object> selected= new ArrayList<>(Arrays.asList(selectedFields));
  if (selectedFields.length == fields.length && selectedFields.length > 0)
    selected.add(getContentProvider().getParent(selectedFields[0]));
  setInitialElementSelections(selected);
  setTitle(JavaUIMessages.GenerateToStringDialog_dialog_title);
  setMessage(JavaUIMessages.GenerateToStringDialog_select_fields_to_include);
  setValidator(new GenerateToStringValidator(fields.length + inheritedFields.length, methods.length + inheritededMethods.length));
  setSize(60, 18);
  setInput(new Object());
  fGenerationSettings= new ToStringGenerationSettings(getDialogSettings());
}

public void up(Object element, CheckboxTreeViewer tree) {
  move(element, tree, -1);
}

public void down(Object element, CheckboxTreeViewer tree) {
  move(element, tree, 1);
}

public boolean canMoveUp(Object element) {
  return getElementPosition(element, getContainingArray(element)) > 0;
}

public void up(Object element, CheckboxTreeViewer tree) {
  move(element, tree, -1);
}

public void down(Object element, CheckboxTreeViewer tree) {
  move(element, tree, 1);
}

public boolean canMoveUp(Object element) {
  return getElementPosition(element, getContainingArray(element)) > 0;
}

@Override
public Object getParent(Object element) {
  Object[] array= getContainingArray(element);
  if (array == fFields)
    return fieldsNode;
  if (array == fInheritedFields)
    return inheritedFieldsNode;
  if (array == fMethods)
    return methodsNode;
  if (array == fInheritedMethods)
    return inheritedMethodsNode;
  return null;
}

@Override
public Object getParent(Object element) {
  Object[] array= getContainingArray(element);
  if (array == fFields)
    return fieldsNode;
  if (array == fInheritedFields)
    return inheritedFieldsNode;
  if (array == fMethods)
    return methodsNode;
  if (array == fInheritedMethods)
    return inheritedMethodsNode;
  return null;
}

private void move(Object element, CheckboxTreeViewer tree, int direction) {
  Object[] array= getContainingArray(element);
  int position= getElementPosition(element, array);
  Object temp= array[position];
  array[position]= array[position + direction];
  array[position + direction]= temp;
  tree.setSelection(new StructuredSelection(element));
  tree.refresh();
}

@Override
public void selectionChanged(SelectionChangedEvent event) {
  IStructuredSelection selection= (IStructuredSelection)getTreeViewer().getSelection();
  Object selected= selection.size() > 0 ? selection.toList().get(0) : null;
  GenerateToStringContentProvider cp= (GenerateToStringContentProvider)getContentProvider();
  fButtonControls[UP_INDEX].setEnabled(cp.canMoveUp(selected));
  fButtonControls[DOWN_INDEX].setEnabled(cp.canMoveDown(selected));
}

public boolean canMoveDown(Object element) {
  Object[] array= getContainingArray(element);
  int position= getElementPosition(element, array);
  return position != -1 && position != array.length - 1;
}

public boolean canMoveDown(Object element) {
  Object[] array= getContainingArray(element);
  int position= getElementPosition(element, array);
  return position != -1 && position != array.length - 1;
}

private void move(Object element, CheckboxTreeViewer tree, int direction) {
  Object[] array= getContainingArray(element);
  int position= getElementPosition(element, array);
  Object temp= array[position];
  array[position]= array[position + direction];
  array[position + direction]= temp;
  tree.setSelection(new StructuredSelection(element));
  tree.refresh();
}