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// -----------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
// -----------------------------------------------------------------------
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Globalization;
using System.Reflection;
using System.ComponentModel.Composition;
using System.Text;
namespace Microsoft.Internal
{
internal static class Requires
{
[DebuggerStepThrough]
public static void NotNull<T>(T value, string parameterName)
where T : class
{
if (value == null)
{
throw new ArgumentNullException(parameterName);
}
}
[DebuggerStepThrough]
public static void NotNullOrEmpty(string value, string parameterName)
{
NotNull(value, parameterName);
if (value.Length == 0)
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, Strings.ArgumentException_EmptyString, parameterName), parameterName);
}
}
[DebuggerStepThrough]
public static void NotNullOrNullElements<T>(IEnumerable<T> values, string parameterName)
where T : class
{
NotNull(values, parameterName);
NotNullElements(values, parameterName);
}
[DebuggerStepThrough]
public static void NullOrNotNullElements<TKey, TValue>(IEnumerable<KeyValuePair<TKey, TValue>> values, string parameterName)
where TKey : class
where TValue : class
{
if (values != null)
{
NotNullElements(values, parameterName);
}
}
[DebuggerStepThrough]
public static void NullOrNotNullElements<T>(IEnumerable<T> values, string parameterName)
where T : class
{
if (values != null)
{
NotNullElements(values, parameterName);
}
}
private static void NotNullElements<T>(IEnumerable<T> values, string parameterName)
where T : class
{
foreach (T value in values)
{
if (value == null)
{
throw ExceptionBuilder.CreateContainsNullElement(parameterName);
}
}
}
private static void NotNullElements<TKey, TValue>(IEnumerable<KeyValuePair<TKey, TValue>> values, string parameterName)
where TKey : class
where TValue : class
{
foreach (KeyValuePair<TKey, TValue> value in values)
{
if ((value.Key == null) || (value.Value == null))
{
throw ExceptionBuilder.CreateContainsNullElement(parameterName);
}
}
}
[DebuggerStepThrough]
public static void IsInMembertypeSet(MemberTypes value, string parameterName, MemberTypes enumFlagSet)
{
if ((value & enumFlagSet) != value || // Ensure the member is in the set
(value & (value - 1)) != 0) // Ensure that there is only one flag in the value (i.e. value is a power of 2).
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, Strings.ArgumentOutOfRange_InvalidEnumInSet, parameterName, value, enumFlagSet.ToString()), parameterName);
}
}
}
}
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