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using System;
using System.IO;
namespace Org.BouncyCastle.Asn1
{
public class BerTaggedObjectParser
: Asn1TaggedObjectParser
{
private readonly int m_tagClass;
private readonly int m_tagNo;
private readonly bool m_constructed;
private readonly Asn1StreamParser m_parser;
internal BerTaggedObjectParser(int tagClass, int tagNo, bool constructed, Asn1StreamParser parser)
{
this.m_tagClass = tagClass;
this.m_tagNo = tagNo;
this.m_constructed = constructed;
this.m_parser = parser;
}
public bool IsConstructed
{
get { return m_constructed; }
}
public int TagClass
{
get { return m_tagClass; }
}
public int TagNo
{
get { return m_tagNo; }
}
public IAsn1Convertible GetObjectParser(int baseTagNo, bool declaredExplicit)
{
if (Asn1Tags.ContextSpecific != TagClass)
throw new Asn1Exception("this method only valid for CONTEXT_SPECIFIC tags");
if (!declaredExplicit)
return m_parser.ReadImplicit(m_constructed, baseTagNo);
if (!m_constructed)
throw new IOException("Explicit tags must be constructed (see X.690 8.14.2)");
return m_parser.ReadObject();
}
public Asn1Object ToAsn1Object()
{
try
{
return m_parser.ReadTaggedObject(TagClass, TagNo, IsConstructed);
}
catch (IOException e)
{
throw new Asn1ParsingException(e.Message);
}
}
}
}
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