/// <summary>
/// Load value of an IArg. This function commonly not called by end user. It is used for internal purpose.
/// </summary>
/// <param name="args">The IArg object.</param>
/// <param name="getArgStr">The delegate of getting the argument value string from configuration source, say, command line, config file.
/// The 1st string parameter is the property name. The 2nd string parameter is the default value. Return value is the string value.
/// </param>
/// <param name="checkStandAloneArg">The delegate of getting the argument value for the standalone argument.
/// The 1st string parameter is the property name. The return value indicates the arguement show up or not.
/// </param>
/// <returns>Indicate the loading argument success or not.</returns>
public static bool LoadArg(this IArg args, Func <string, string, string> getArgStr, Func <string, bool> checkStandAloneArg = null)
{
if ((null == args) || (null == getArgStr))
{
return(false);
}
Type t = args.GetType();
var ps = t.GetProperties();
foreach (var p in ps)
{
object[] attrs = p.GetCustomAttributes(typeof(ArgInfAttribute), false);
if ((null == attrs) || (0 == attrs.Length))
{
continue;
}
ArgInfAttribute ia = attrs[0] as ArgInfAttribute;
string key;
int index = p.Name.LastIndexOf('.');
key = (index >= 0) ? p.Name.Substring(index) : p.Name;
string argStr = null;
if (ia.AType == ArgInfAttribute.ArgType.KeyValue)
{
if ((args.ArgInited) || (ia.Mandatory))
{
argStr = getArgStr(key, null);
}
else
{
argStr = getArgStr(key, ia.Default);
}
}
else //if ( ia.AType == ArgInfAttribute.ArgType.StandAlone )
{
try
{
argStr = checkStandAloneArg(key).ToString();
}
catch { }
}
if ((null != argStr) && (argStr.Length > 0))
{
if (!args.SetValFromString(p, argStr))
{
return(false);
}
ia.Mandatory = false;
}
}
args.ArgInited = true;
return(true);
}
/// <summary>
/// Check if all mandate properties of an IArg are initialized.
/// </summary>
/// <param name="arg">The IArg to be checked.</param>
/// <returns>True if all mandate properties are initialized.</returns>
public static bool IsMandateInited(this IArg arg)
{
Type t = arg.GetType();
var ps = t.GetProperties();
foreach (var p in ps)
{
Object[] atts = p.GetCustomAttributes(typeof(ArgInfAttribute), false);
foreach (object o in atts)
{
ArgInfAttribute attr = o as ArgInfAttribute;
if ((null != attr) && (attr.Mandatory))
{
return(false);
}
}
}
return(true);
}
/// <summary>
/// Get the help information of an IArg.
/// </summary>
/// <param name="arg">The IArg object.</param>
/// <returns></returns>
public static string GetHelpInfo(this IArg arg)
{
StringBuilder helpInfo = new StringBuilder();
Type t = arg.GetType();
var ps = t.GetProperties();
foreach (var p in ps)
{
Object[] atts = p.GetCustomAttributes(typeof(ArgInfAttribute), false);
if (atts.Length > 0)
{
string s;
int index = p.Name.LastIndexOf('.');
s = (index >= 0) ? p.Name.Substring(index) : p.Name;
foreach (object o in atts)
{
ArgInfAttribute attr = o as ArgInfAttribute;
if (null != attr)
{
if (attr.AType == ArgInfAttribute.ArgType.KeyValue)
{
helpInfo.Append("-");
helpInfo.Append(s);
helpInfo.Append(" :[Type ");
helpInfo.Append(p.PropertyType.Name);
helpInfo.Append("] \n ");
helpInfo.Append(attr.HelpInf);
}
else
{
helpInfo.Append(s);
helpInfo.Append(":\n ");
helpInfo.Append(attr.HelpInf);
}
helpInfo.Append("\n");
}
}
}
}
return(helpInfo.ToString());
}
