/**
* Appends the usage clause for an OptionGroup to a StringBuffer.
* The clause is wrapped in square brackets if the group is required.
* The display of the options is handled by appendOption
* @param buff the StringBuffer to append to
* @param group the group to append
* @see #appendOption(StringBuffer,Option,boolean)
*/
private void AppendOptionGroup(StringBuilder buff, OptionGroup group)
{
if (!group.IsRequired())
{
buff.Append("[");
}
List <Option> optList = new List <Option>(group.GetOptions());
if (GetOptionComparator() != null)
{
optList.Sort(GetOptionComparator());
}
foreach (Option option in optList)
{
// whether the option is required or not is handled at group level
AppendOption(buff, option, true);
if (optList.IndexOf(option) < optList.Count - 1)
{
buff.Append(" | ");
}
}
if (!group.IsRequired())
{
buff.Append("]");
}
}
/**
* Add the specified option group.
*
* @param group the OptionGroup that is to be added
* @return the resulting Options instance
*/
public Options AddOptionGroup(OptionGroup group)
{
if (group.IsRequired())
{
requiredOpts.Add(group);
}
foreach (Option option in group.GetOptions())
{
// an Option cannot be required if it is in an
// OptionGroup, either the group is required or
// nothing is required
option.SetRequired(false);
AddOption(option);
optionGroups.Add(option.GetKey(), group);
}
return(this);
}
