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//---------------------------------------------------------------------
// <copyright file="Util.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Diagnostics;
using System.Text;
namespace System.Data.Metadata.Edm
{
/// <summary>
/// Class holding utility functions for metadata
/// </summary>
internal static class Util
{
#region Methods
/// <summary>
/// Throws an appropriate exception if the given item is a readonly, used when an attempt is made to change
/// a property
/// </summary>
/// <param name="item">The item whose readonly is being tested</param>
internal static void ThrowIfReadOnly(MetadataItem item)
{
Debug.Assert(item != null, "The given item is null");
if (item.IsReadOnly)
{
throw EntityUtil.OperationOnReadOnlyItem();
}
}
/// <summary>
/// Check to make sure the given item do have identity
/// </summary>
/// <param name="item">The item to check for valid identity</param>
/// <param name="argumentName">The name of the argument</param>
[Conditional("DEBUG")]
internal static void AssertItemHasIdentity(MetadataItem item, string argumentName)
{
Debug.Assert(!string.IsNullOrEmpty(item.Identity), "Item has empty identity.");
EntityUtil.GenericCheckArgumentNull(item, argumentName);
}
#endregion
}
}
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