private bool shouldWrapNotFilterInParenthesis(NotFilter item)
{
// if the child is a filter group with more than one child, wrap in parentheses
// unless, it would result in double wrapping
FilterGroup group = item.Filter as FilterGroup;
if (group == null || group.Count == 1 || (group.WrapInParentheses ?? options.WrapFiltersInParentheses))
{
return false;
}
return true;
}
/// <summary>
/// Visits a NotFilter builder.
/// </summary>
/// <param name="item">The item to visit.</param>
protected internal virtual void VisitNotFilter(NotFilter item)
{
}
/// <summary>
/// Generates the text for a NotFilter builder.
/// </summary>
/// <param name="item">The NotFilter builder to generate the text for.</param>
protected internal override void VisitNotFilter(NotFilter item)
{
Action visitor = () =>
{
writer.Write("NOT ");
bool wrapInParenthesis = shouldWrapNotFilterInParenthesis(item);
if (wrapInParenthesis)
{
writer.Write("(");
}
item.Filter.Accept(forSubCommand());
if (wrapInParenthesis)
{
writer.Write(")");
}
};
visitFilter(item, visitor);
}
/// <summary>
/// Visits a NotFilter builder.
/// </summary>
/// <param name="item">The item to visit.</param>
protected internal virtual void VisitNotFilter(NotFilter item)
{
}