ContentInfo.cs :  » PDF » iTextSharp » Org » BouncyCastle » Asn1 » Pkcs » C# / CSharp Open Source

using System;
using System.Collections;

using Org.BouncyCastle.Asn1;

namespace Org.BouncyCastle.Asn1.Pkcs{
    public class ContentInfo
        : Asn1Encodable
    {
        private readonly DerObjectIdentifier  contentType;
        private readonly Asn1Encodable      content;

    public static ContentInfo GetInstance(
            object obj)
        {
            if (obj is ContentInfo)
            {
                return (ContentInfo) obj;
            }

      if (obj is Asn1Sequence)
            {
                return new ContentInfo((Asn1Sequence) obj);
            }

      throw new ArgumentException("Unknown object in factory: " + obj.GetType().FullName, "obj");
        }

    private ContentInfo(
            Asn1Sequence seq)
        {
      contentType = (DerObjectIdentifier) seq[0];

      if (seq.Count > 1)
      {
        content = ((Asn1TaggedObject) seq[1]).GetObject();
      }
        }

    public ContentInfo(
            DerObjectIdentifier  contentType,
            Asn1Encodable    content)
        {
            this.contentType = contentType;
            this.content = content;
        }

    public DerObjectIdentifier ContentType
    {
      get { return contentType; }
    }

    public Asn1Encodable Content
    {
      get { return content; }
    }

    /**
         * Produce an object suitable for an Asn1OutputStream.
         * <pre>
         * ContentInfo ::= Sequence {
         *          contentType ContentType,
         *          content
         *          [0] EXPLICIT ANY DEFINED BY contentType OPTIONAL }
         * </pre>
         */
        public override Asn1Object ToAsn1Object()
        {
            Asn1EncodableVector v = new Asn1EncodableVector(contentType);

      if (content != null)
            {
                v.Add(new BerTaggedObject(0, content));
            }

      return new BerSequence(v);
        }
    }
}