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//------------------------------------------------------------------------------
//
// System.IO.CheckArgument.cs
//
// Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved
//
// Author: Jim Richardson, develop@wtfo-guru.com
// Created: Saturday, August 25, 2001
//
// NOTE: All contributors can freely add to this class or make modifications
// that do not break existing usage of methods
//------------------------------------------------------------------------------
using System;
using System.IO;
namespace System.IO
{
/// <summary>
/// A utility class to assist with various argument validations in System.IO
/// </summary>
internal sealed class CheckArgument
{
/// <summary>
/// Generates and exception if arg contains whitepace only
/// </summary>
public static void WhitespaceOnly (string arg, string desc)
{
if (arg != null && arg.Length > 0)
{
string temp = arg;
temp.Trim ();
if (temp.Length == 0)
{
throw new ArgumentException (desc);
}
}
}
/// <summary>
/// Generates and exception if arg contains whitepace only
/// </summary>
public static void WhitespaceOnly (string arg)
{
WhitespaceOnly (arg, "Argument string consists of whitespace characters only.");
}
/// <summary>
/// Generates and exception if arg is empty
/// </summary>
public static void Empty (string arg, string desc)
{
if (arg != null && arg.Length == 0)
{
throw new ArgumentException (desc);
}
}
/// <summary>
/// Generates and exception if arg is empty
/// </summary>
public static void Empty (string arg)
{
Empty (arg, "Argument string is empty.");
}
/// <summary>
/// Generates and exception if arg is null
/// </summary>
public static void Null (Object arg, string desc)
{
if (arg == null)
{
throw new ArgumentNullException (desc);
}
}
/// <summary>
/// Generates and exception if arg is null
/// </summary>
public static void Null (Object arg)
{
if (arg == null)
{
throw new ArgumentNullException ();
}
}
/// <summary>
/// Generates and exception if path contains invalid path characters
/// </summary>
public static void PathChars (string path, string desc)
{
if (path != null)
{
if (path.IndexOfAny (System.IO.Path.InvalidPathChars) > -1)
{
throw new ArgumentException (desc);
}
}
}
/// <summary>
/// Generates and exception if path contains invalid path characters
/// </summary>
public static void PathChars (string path)
{
PathChars (path, "Path contains invalid characters");
}
/// <summary>
/// Generates and exception if path too long
/// </summary>
[MonoTODO]
public static void PathLength (string path, string desc)
{
//TODO: find out how long is too long
}
/// <summary>
/// Generates and exception if path too long
/// </summary>
public static void PathLength (string path)
{
PathLength (path);
}
/// <summary>
/// Generates and exception if path is illegal
/// </summary>
public static void Path (string path, bool bAllowNull, bool bLength)
{
if (path != null) //allow null
{
Empty (path, "Path cannot be the empty string"); // path can't be empty
WhitespaceOnly (path, "Path cannot be all whitespace"); // path can't be all whitespace
PathChars (path); // path can't contain invalid characters
if (bLength)
{
PathLength ("Path too long");
}
}
else if (!bAllowNull)
{
throw new ArgumentNullException ("Parameter name: path");
}
}
/// <summary>
/// Generates and exception if path is illegal
/// </summary>
public static void Path (string path, bool bAllowNull)
{
Path (path, bAllowNull, false);
}
/// <summary>
/// Generates and exception if path is illegal
/// </summary>
public static void Path (string path)
{
Path (path, false, false);
}
}
} // namespace System.IO.Private
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