/// <summary>
/// Creates a new command line argument parser.
/// </summary>
/// <param name="argumentSpecification"> The type of object to parse. </param>
/// <param name="reporter"> The destination for parse errors. </param>
public Parser(Type argumentSpecification, ErrorReporter reporter)
{
this.reporter = reporter;
this.arguments = new ArrayList();
this.argumentMap = new Hashtable();
foreach (FieldInfo field in argumentSpecification.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy))
{
if (!field.IsStatic && !field.IsInitOnly && !field.IsLiteral)
{
ArgumentAttribute attribute = GetAttribute(field);
if (attribute is DefaultArgumentAttribute)
{
Debug.Assert(this.defaultArgument == null);
this.defaultArgument = new Argument(attribute, field, reporter);
}
else
{
this.arguments.Add(new Argument(attribute, field, reporter));
}
}
}
// add explicit names to map
foreach (Argument argument in this.arguments)
{
Debug.Assert(!argumentMap.ContainsKey(argument.LongName));
this.argumentMap[argument.LongName] = argument;
if (argument.ExplicitShortName)
{
if (argument.ShortName != null && argument.ShortName.Length > 0)
{
Debug.Assert(!argumentMap.ContainsKey(argument.ShortName));
this.argumentMap[argument.ShortName] = argument;
}
else
{
argument.ClearShortName();
}
}
}
// add implicit names which don't collide to map
foreach (Argument argument in this.arguments)
{
if (!argument.ExplicitShortName)
{
if (argument.ShortName != null && argument.ShortName.Length > 0 && !argumentMap.ContainsKey(argument.ShortName))
{
this.argumentMap[argument.ShortName] = argument;
}
else
{
argument.ClearShortName();
}
}
}
}
private static string HelpText(ArgumentAttribute attribute, FieldInfo field)
{
if (attribute == null)
{
return(null);
}
else
{
return(attribute.HelpText);
}
}
private static string ShortName(ArgumentAttribute attribute, FieldInfo field)
{
if (attribute is DefaultArgumentAttribute)
{
return(null);
}
if (!ExplicitShortName(attribute))
{
return(LongName(attribute, field).Substring(0, 1));
}
return(attribute.ShortName);
}
private static ArgumentType Flags(ArgumentAttribute attribute, FieldInfo field)
{
if (attribute != null)
{
return(attribute.Type);
}
else if (IsCollectionType(field.FieldType))
{
return(ArgumentType.MultipleUnique);
}
else
{
return(ArgumentType.AtMostOnce);
}
}
private static object DefaultValue(ArgumentAttribute attribute, FieldInfo field)
{
return((attribute == null || !attribute.HasDefaultValue) ? null : attribute.DefaultValue);
}
private static bool ExplicitShortName(ArgumentAttribute attribute)
{
return(attribute != null && !attribute.DefaultShortName);
}
private static bool HasHelpText(ArgumentAttribute attribute)
{
return(attribute != null && attribute.HasHelpText);
}
private static string LongName(ArgumentAttribute attribute, FieldInfo field)
{
return((attribute == null || attribute.DefaultLongName) ? field.Name : attribute.LongName);
}
