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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
namespace System.Security.Cryptography.X509Certificates
{
public sealed class X509ChainElementCollection : ICollection, IEnumerable<X509ChainElement>
{
private readonly X509ChainElement[] _elements;
internal X509ChainElementCollection()
{
_elements = Array.Empty<X509ChainElement>();
}
internal X509ChainElementCollection(X509ChainElement[] chainElements)
{
Debug.Assert(chainElements != null);
_elements = chainElements;
}
public int Count
{
get { return _elements.Length; }
}
public bool IsSynchronized
{
get { return false; }
}
public object SyncRoot
{
get { return this; }
}
public X509ChainElement this[int index]
{
get
{
if (index < 0)
throw new InvalidOperationException(SR.InvalidOperation_EnumNotStarted);
if (index >= _elements.Length)
throw new ArgumentOutOfRangeException(nameof(index), SR.ArgumentOutOfRange_IndexMustBeLess);
return _elements[index];
}
}
public void CopyTo(X509ChainElement[] array, int index)
{
((ICollection)this).CopyTo(array, index);
}
void ICollection.CopyTo(Array array, int index)
{
ArgumentNullException.ThrowIfNull(array);
if (array.Rank != 1)
throw new ArgumentException(SR.Arg_RankMultiDimNotSupported);
if (index < 0 || index >= array.Length)
throw new ArgumentOutOfRangeException(nameof(index), SR.ArgumentOutOfRange_IndexMustBeLess);
if (index + Count > array.Length)
throw new ArgumentException(SR.Argument_InvalidOffLen);
for (int i = 0; i < Count; i++)
{
array.SetValue(this[i], index);
index++;
}
}
public X509ChainElementEnumerator GetEnumerator()
{
return new X509ChainElementEnumerator(this);
}
IEnumerator IEnumerable.GetEnumerator()
{
return new X509ChainElementEnumerator(this);
}
IEnumerator<X509ChainElement> IEnumerable<X509ChainElement>.GetEnumerator() => GetEnumerator();
}
}
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