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using System;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1
{
public class DerGraphicString
: DerStringBase
{
/**
* return a Graphic String from the passed in object
*
* @param obj a DerGraphicString or an object that can be converted into one.
* @exception IllegalArgumentException if the object cannot be converted.
* @return a DerGraphicString instance, or null.
*/
public static DerGraphicString GetInstance(object obj)
{
if (obj == null || obj is DerGraphicString)
{
return (DerGraphicString)obj;
}
if (obj is byte[])
{
try
{
return (DerGraphicString)FromByteArray((byte[])obj);
}
catch (Exception e)
{
throw new ArgumentException("encoding error in GetInstance: " + e.ToString(), "obj");
}
}
throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj), "obj");
}
/**
* return a Graphic String from a tagged object.
*
* @param obj the tagged object holding the object we want
* @param explicit true if the object is meant to be explicitly
* tagged false otherwise.
* @exception IllegalArgumentException if the tagged object cannot
* be converted.
* @return a DerGraphicString instance, or null.
*/
public static DerGraphicString GetInstance(Asn1TaggedObject obj, bool isExplicit)
{
Asn1Object o = obj.GetObject();
if (isExplicit || o is DerGraphicString)
{
return GetInstance(o);
}
return new DerGraphicString(((Asn1OctetString)o).GetOctets());
}
private readonly byte[] m_contents;
public DerGraphicString(byte[] contents)
: this(contents, true)
{
}
internal DerGraphicString(byte[] contents, bool clone)
{
if (null == contents)
throw new ArgumentNullException("contents");
this.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.GraphicString, m_contents);
}
internal override IAsn1Encoding GetEncodingImplicit(int encoding, int tagClass, int tagNo)
{
return new PrimitiveEncoding(tagClass, tagNo, m_contents);
}
protected override int Asn1GetHashCode()
{
return Arrays.GetHashCode(m_contents);
}
protected override bool Asn1Equals(Asn1Object asn1Object)
{
DerGraphicString that = asn1Object as DerGraphicString;
return null != that
&& Arrays.AreEqual(this.m_contents, that.m_contents);
}
internal static DerGraphicString CreatePrimitive(byte[] contents)
{
return new DerGraphicString(contents, false);
}
}
}
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