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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.Activities
{
using System;
using System.Collections.Generic;
using System.Runtime;
class IdSpace
{
int lastId;
IList<Activity> members;
public IdSpace()
{
}
public IdSpace(IdSpace parent, int parentId)
{
this.Parent = parent;
this.ParentId = parentId;
}
public IdSpace Parent
{
get;
private set;
}
public int ParentId
{
get;
private set;
}
public int MemberCount
{
get
{
if (this.members == null)
{
return 0;
}
else
{
return this.members.Count;
}
}
}
public Activity Owner
{
get
{
if (this.Parent != null)
{
return this.Parent[this.ParentId];
}
return null;
}
}
public Activity this[int id]
{
get
{
int lookupId = id - 1;
if (this.members == null || lookupId < 0 || lookupId >= this.members.Count)
{
return null;
}
else
{
return this.members[lookupId];
}
}
}
public void AddMember(Activity element)
{
if (this.members == null)
{
this.members = new List<Activity>();
}
if (lastId == int.MaxValue)
{
throw FxTrace.Exception.AsError(new NotSupportedException(SR.OutOfIdSpaceIds));
}
lastId++;
// ID info is cleared inside InternalId.
element.InternalId = lastId;
Fx.Assert(element.MemberOf == this, "We should have already set this.");
Fx.Assert(this.members.Count == element.InternalId - 1, "We should always be adding the next element");
this.members.Add(element);
}
public void Dispose()
{
if (this.members != null)
{
this.members.Clear();
}
this.lastId = 0;
this.Parent = null;
this.ParentId = 0;
}
}
}
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