/// <summary>
/// Parse given arguments.
/// </summary>
/// <param name="args">The arguments to parse.</param>
/// <returns>Remaining arguments.</returns>
public string[] Parse(string[] args)
{
List <string> remainingArgs = new List <string>();
bool lastSwitch = false;
for (int i = 0; i < args.Length;)
{
if (lastSwitch)
{
remainingArgs.Add(args[i++]);
}
else
{
CommandLineSwitch clSwitch = GetBestMatch(args, i);
if (clSwitch == null)
{
remainingArgs.Add(args[i++]);
}
else if (clSwitch.ParsedArgsCount == 0)
{
throw new CommandLineSwitchSyntaxException(args[i++]);
}
else
{
i += clSwitch.Commit();
lastSwitch = lastSwitch || clSwitch.EndMarkerSwitch;
if (clSwitch.RemainingArg.Length > 0)
{
remainingArgs.Add(clSwitch.RemainingArg);
}
}
}
}
return(remainingArgs.ToArray());
}
/// <summary>
/// Get the switch that best matches given arguments.
/// </summary>
/// <param name="args">The arguments array to parse.</param>
/// <param name="startIndex">The index into the <paramref name="args"/> array where to start parsing.</param>
/// <returns>The <see cref="CommandLineSwitch"/> that best matches given arguments</returns>
public CommandLineSwitch GetBestMatch(string[] args, int startIndex)
{
CommandLineSwitch bestMatchSwitch = null;
foreach (CommandLineSwitch item in SwitchesOrderedByType)
{
item.Parse(args, startIndex);
if (item.ParsedLength == 0)
{
if (item.EndMarkerSwitch)
{
return(item);
}
continue;
}
if (bestMatchSwitch == null ||
item.ParsedLength > bestMatchSwitch.ParsedLength ||
item.ParsedLength == bestMatchSwitch.ParsedLength && item.NameMatchExactly && !bestMatchSwitch.NameMatchExactly)
{
bestMatchSwitch = item;
}
else if (item.NameMatchExactly == bestMatchSwitch.NameMatchExactly && item.ParsedLength == bestMatchSwitch.ParsedLength)
{
throw new CommandLineSwitchAmbiguousException(item.ParsedName, new string[] { item.Name, bestMatchSwitch.Name });
}
}
return(bestMatchSwitch);
}
/// <summary>
/// Add command line switches for given <paramref name="objectWithSwitchAttributes"/> type.
/// </summary>
/// <param name="objectWithSwitchAttributes">The attributed object from which the switches will be created</param>
public void AddSwitchesForType(object objectWithSwitchAttributes)
{
foreach (CommandLineSwitch item in CommandLineSwitch.CreateSwitchesForType(objectWithSwitchAttributes))
{
_switches[item.Name] = item;
}
}
internal static IEnumerable <CommandLineSwitch> CreateSwitchesForType(object objectWithSwitchAttributes)
{
Type type = objectWithSwitchAttributes.GetType();
MemberInfo[] members = type.GetMembers(BindingFlags.Instance | BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.SetProperty);
for (int i = 0; i < members.Length; ++i)
{
object[] attributes = members[i].GetCustomAttributes(false);
if (attributes.Length > 0)
{
CommandLineSwitch clSwitch = null;
foreach (Attribute attribute in attributes)
{
if (attribute is CommandLineSwitchAttribute)
{
CommandLineSwitchAttribute switchAttribute = attribute as CommandLineSwitchAttribute;
// Get the property information. We're only handling properties at the moment!
if (members[i] is PropertyInfo)
{
PropertyInfo pi = (PropertyInfo)members[i];
string switchName = switchAttribute.Name;
if (switchName == null || switchName.Length == 0)
{
switchName = pi.Name;
}
clSwitch = CommandLineSwitch.Create(switchName, switchAttribute.Description, pi.PropertyType);
// Map in the Get/Set methods.
clSwitch.SetMethod = pi.GetSetMethod(true);
clSwitch.GetMethod = pi.GetGetMethod(true);
clSwitch.Target = objectWithSwitchAttributes;
// Can only handle a single switch for each property
// (otherwise the parsing of aliases gets silly...)
break;
}
}
}
// See if any aliases are required. We can only do this after
// a switch has been registered and the framework doesn't make
// any guarantees about the order of attributes, so we have to
// walk the collection a second time.
if (clSwitch != null)
{
foreach (Attribute attribute in attributes)
{
if (attribute is CommandLineSwitchAliasAttribute)
{
CommandLineSwitchAliasAttribute aliasAttribute = attribute as CommandLineSwitchAliasAttribute;
clSwitch.AddAlias(aliasAttribute.Alias);
}
}
}
// Assuming we have an switch (that may or may not have aliases), add it to the collection of switches.
if (clSwitch != null)
{
yield return(clSwitch);
}
}
}
}
