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using System;
using System.Collections;
using System.IO;
namespace Org.BouncyCastle.Asn1
{
internal class LazyDLSet
: DLSet
{
private byte[] encoded;
internal LazyDLSet(byte[] encoded)
: base()
{
if (null == encoded)
throw new ArgumentNullException("encoded");
this.encoded = encoded;
}
public override Asn1Encodable this[int index]
{
get
{
Force();
return base[index];
}
}
public override IEnumerator GetEnumerator()
{
byte[] encoded = GetContents();
if (null != encoded)
{
return new LazyDLEnumerator(encoded);
}
return base.GetEnumerator();
}
public override int Count
{
get
{
Force();
return base.Count;
}
}
public override Asn1Encodable[] ToArray()
{
Force();
return base.ToArray();
}
public override string ToString()
{
Force();
return base.ToString();
}
internal override int EncodedLength(int encoding, bool withID)
{
if (Asn1OutputStream.EncodingBer == encoding)
{
byte[] encoded = GetContents();
if (null != encoded)
return Asn1OutputStream.GetLengthOfEncodingDL(withID, encoded.Length);
}
else
{
Force();
}
return base.EncodedLength(encoding, withID);
}
internal override void Encode(Asn1OutputStream asn1Out, bool withID)
{
if (Asn1OutputStream.EncodingBer == asn1Out.Encoding)
{
byte[] encoded = GetContents();
if (encoded != null)
{
asn1Out.WriteEncodingDL(withID, Asn1Tags.Constructed | Asn1Tags.Set, encoded);
return;
}
}
else
{
Force();
}
base.Encode(asn1Out, withID);
}
private void Force()
{
lock (this)
{
if (null != encoded)
{
Asn1InputStream input = new LazyAsn1InputStream(encoded);
try
{
Asn1EncodableVector v = input.ReadVector();
this.elements = v.TakeElements();
this.isSorted = elements.Length < 2;
this.encoded = null;
}
catch (IOException e)
{
throw new Asn1ParsingException("malformed ASN.1: " + e.Message, e);
}
}
}
}
private byte[] GetContents()
{
lock (this) return encoded;
}
}
}
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