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//-----------------------------------------------------------------------
// <copyright file="RequiresEx.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth {
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.Contracts;
using System.Globalization;
using System.Linq;
using System.Text;
using DotNetOpenAuth.Messaging;
using Validation;
/// <summary>
/// Argument validation checks that throw some kind of ArgumentException when they fail (unless otherwise noted).
/// </summary>
internal static class RequiresEx {
/// <summary>
/// Validates some expression describing the acceptable condition for an argument evaluates to true.
/// </summary>
/// <param name="condition">The expression that must evaluate to true to avoid an <see cref="InvalidOperationException"/>.</param>
[Pure, DebuggerStepThrough]
internal static void ValidState(bool condition) {
if (!condition) {
throw new InvalidOperationException();
}
}
/// <summary>
/// Validates some expression describing the acceptable condition for an argument evaluates to true.
/// </summary>
/// <param name="condition">The expression that must evaluate to true to avoid an <see cref="InvalidOperationException"/>.</param>
/// <param name="message">The message to include with the exception.</param>
[Pure, DebuggerStepThrough]
internal static void ValidState(bool condition, string message) {
if (!condition) {
throw new InvalidOperationException(message);
}
}
/// <summary>
/// Validates some expression describing the acceptable condition for an argument evaluates to true.
/// </summary>
/// <param name="condition">The expression that must evaluate to true to avoid an <see cref="InvalidOperationException"/>.</param>
/// <param name="unformattedMessage">The unformatted message.</param>
/// <param name="args">Formatting arguments.</param>
[Pure, DebuggerStepThrough]
internal static void ValidState(bool condition, string unformattedMessage, params object[] args) {
if (!condition) {
throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, unformattedMessage, args));
}
}
/// <summary>
/// Validates that some argument describes a type that is or derives from a required type.
/// </summary>
/// <typeparam name="T">The type that the argument must be or derive from.</typeparam>
/// <param name="type">The type given in the argument.</param>
/// <param name="parameterName">Name of the parameter.</param>
[Pure, DebuggerStepThrough]
internal static void NotNullSubtype<T>(Type type, string parameterName) {
Requires.NotNull(type, parameterName);
Requires.That(typeof(T).IsAssignableFrom(type), parameterName, MessagingStrings.UnexpectedType, typeof(T).FullName, type.FullName);
}
/// <summary>
/// Validates some expression describing the acceptable condition for an argument evaluates to true.
/// </summary>
/// <param name="condition">The expression that must evaluate to true to avoid an <see cref="FormatException"/>.</param>
/// <param name="message">The message.</param>
[Pure, DebuggerStepThrough]
internal static void Format(bool condition, string message) {
if (!condition) {
throw new FormatException(message);
}
}
/// <summary>
/// Throws an <see cref="NotSupportedException"/> if a condition does not evaluate to <c>true</c>.
/// </summary>
/// <param name="condition">The expression that must evaluate to true to avoid an <see cref="NotSupportedException"/>.</param>
/// <param name="message">The message.</param>
[Pure, DebuggerStepThrough]
internal static void Support(bool condition, string message) {
if (!condition) {
throw new NotSupportedException(message);
}
}
}
}
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