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using System;
namespace Org.BouncyCastle.Asn1.Ess
{
public class ContentHints
: Asn1Encodable
{
private readonly DerUtf8String contentDescription;
private readonly DerObjectIdentifier contentType;
public static ContentHints GetInstance(
object o)
{
if (o == null || o is ContentHints)
{
return (ContentHints)o;
}
if (o is Asn1Sequence)
{
return new ContentHints((Asn1Sequence)o);
}
throw new ArgumentException("unknown object in 'ContentHints' factory : "
+ o.GetType().Name + ".");
}
/**
* constructor
*/
private ContentHints(
Asn1Sequence seq)
{
IAsn1Convertible field = seq[0];
if (field.ToAsn1Object() is DerUtf8String)
{
contentDescription = DerUtf8String.GetInstance(field);
contentType = DerObjectIdentifier.GetInstance(seq[1]);
}
else
{
contentType = DerObjectIdentifier.GetInstance(seq[0]);
}
}
public ContentHints(
DerObjectIdentifier contentType)
{
this.contentType = contentType;
this.contentDescription = null;
}
public ContentHints(
DerObjectIdentifier contentType,
DerUtf8String contentDescription)
{
this.contentType = contentType;
this.contentDescription = contentDescription;
}
public DerObjectIdentifier ContentType
{
get { return contentType; }
}
public DerUtf8String ContentDescription
{
get { return contentDescription; }
}
/**
* <pre>
* ContentHints ::= SEQUENCE {
* contentDescription UTF8String (SIZE (1..MAX)) OPTIONAL,
* contentType ContentType }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector();
if (contentDescription != null)
{
v.Add(contentDescription);
}
v.Add(contentType);
return new DerSequence(v);
}
}
}
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