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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.asn1.isismtt.x509;

import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.x500.DirectoryString;

/**
 * Some other information of non-restrictive nature regarding the usage of this
 * certificate.
 * 
 *  *    AdditionalInformationSyntax ::= DirectoryString (SIZE(1..2048))
 * 
 */
public class AdditionalInformationSyntax
    extends ASN1Object
{
    private DirectoryString information;

    public static AdditionalInformationSyntax getInstance(Object obj)
    {
        if (obj instanceof AdditionalInformationSyntax)
        {
            return (AdditionalInformationSyntax)obj;
        }

        if (obj != null)
        {
            return new AdditionalInformationSyntax(DirectoryString.getInstance(obj));
        }

        return null;
    }

    private AdditionalInformationSyntax(DirectoryString information)
    {
        this.information = information;
    }

    /**
     * Constructor from a given details.
     *
     * @param information The description of the information.
     */
    public AdditionalInformationSyntax(String information)
    {
        this(new DirectoryString(information));
    }

    public DirectoryString getInformation()
    {
        return information;
    }

    /**
     * Produce an object suitable for an ASN1OutputStream.
     * 
     * Returns:
     * 
     *   AdditionalInformationSyntax ::= DirectoryString (SIZE(1..2048))
     * 
     *
     * @return a DERObject
     */
    public ASN1Primitive toASN1Primitive()
    {
        return information.toASN1Primitive();
    }
}