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//---------------------------------------------------------------------
// <copyright file="SafeLink.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
namespace System.Data.Metadata.Edm
{
internal class SafeLink<TParent> where TParent : class
{
private TParent _value;
public TParent Value { get { return _value; } }
internal static IEnumerable<TChild> BindChildren<TChild>(TParent parent, Func<TChild, SafeLink<TParent>> getLink, IEnumerable<TChild> children)
{
foreach (TChild child in children)
{
BindChild(parent, getLink, child);
}
return children;
}
internal static TChild BindChild<TChild>(TParent parent, Func<TChild, SafeLink<TParent>> getLink, TChild child)
{
SafeLink<TParent> link = getLink(child);
Debug.Assert(link._value == null || link._value == parent, "don't try to hook up the same child to a different parent");
// this is the good stuff..
// only this method can actually make the link since _value is a private
link._value = parent;
return child;
}
}
}
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