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using System;
using System.IO;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1
{
public class DerVideotexString
: DerStringBase
{
internal class Meta : Asn1UniversalType
{
internal static readonly Asn1UniversalType Instance = new Meta();
private Meta() : base(typeof(DerVideotexString), Asn1Tags.VideotexString) {}
internal override Asn1Object FromImplicitPrimitive(DerOctetString octetString)
{
return CreatePrimitive(octetString.GetOctets());
}
}
/**
* return a videotex string from the passed in object
*
* @param obj a DERVideotexString or an object that can be converted into one.
* @exception IllegalArgumentException if the object cannot be converted.
* @return a DERVideotexString instance, or null.
*/
public static DerVideotexString GetInstance(object obj)
{
if (obj == null || obj is DerVideotexString)
{
return (DerVideotexString)obj;
}
else if (obj is IAsn1Convertible)
{
Asn1Object asn1Object = ((IAsn1Convertible)obj).ToAsn1Object();
if (asn1Object is DerVideotexString)
return (DerVideotexString)asn1Object;
}
else if (obj is byte[])
{
try
{
return (DerVideotexString)Meta.Instance.FromByteArray((byte[])obj);
}
catch (IOException e)
{
throw new ArgumentException("failed to construct videotex string from byte[]: " + e.Message);
}
}
throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj), "obj");
}
/**
* return a videotex string from a tagged object.
*
* @param taggedObject the tagged object holding the object we want
* @param declaredExplicit true if the object is meant to be explicitly tagged false otherwise.
* @exception IllegalArgumentException if the tagged object cannot be converted.
* @return a DERVideotexString instance, or null.
*/
public static DerVideotexString GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return (DerVideotexString)Meta.Instance.GetContextInstance(taggedObject, declaredExplicit);
}
private readonly byte[] m_contents;
public DerVideotexString(byte[] contents)
: this(contents, true)
{
}
internal DerVideotexString(byte[] contents, bool clone)
{
if (null == contents)
throw new ArgumentNullException("contents");
m_contents = clone ? Arrays.Clone(contents) : contents;
}
public override string GetString()
{
return Strings.FromByteArray(m_contents);
}
public byte[] GetOctets()
{
return Arrays.Clone(m_contents);
}
internal override IAsn1Encoding GetEncoding(int encoding)
{
return new PrimitiveEncoding(Asn1Tags.Universal, Asn1Tags.VideotexString, m_contents);
}
internal override IAsn1Encoding GetEncodingImplicit(int encoding, int tagClass, int tagNo)
{
return new PrimitiveEncoding(tagClass, tagNo, m_contents);
}
protected override bool Asn1Equals(Asn1Object asn1Object)
{
DerVideotexString that = asn1Object as DerVideotexString;
return null != that
&& Arrays.AreEqual(this.m_contents, that.m_contents);
}
protected override int Asn1GetHashCode()
{
return Arrays.GetHashCode(m_contents);
}
internal static DerVideotexString CreatePrimitive(byte[] contents)
{
return new DerVideotexString(contents, false);
}
}
}
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