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The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls. This jar contains APIs for JDK 1.8 and up.

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package org.bouncycastle.oer.its.ieee1609dot2;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.oer.its.ItsUtils;
import org.bouncycastle.oer.its.etsi103097.extension.EtsiOriginatingHeaderInfoExtension;

/**
 * ContributedExtensionBlock ::= SEQUENCE {
 * contributorId IEEE1609DOT2-HEADERINFO-CONTRIBUTED-EXTENSION.
 * &id({Ieee1609Dot2HeaderInfoContributedExtensions}),
 * extns   SEQUENCE (SIZE(1..MAX)) OF IEEE1609DOT2-HEADERINFO-CONTRIBUTED-EXTENSION.
 * &Extn({Ieee1609Dot2HeaderInfoContributedExtensions}{@.contributorId})
 * }
 */
public class ContributedExtensionBlock
    extends ASN1Object
{
    private final HeaderInfoContributorId contributorId;
    private final List extns;

    public ContributedExtensionBlock(HeaderInfoContributorId contributorId, List extns)
    {
        this.contributorId = contributorId;
        this.extns = extns;
    }

    private ContributedExtensionBlock(ASN1Sequence sequence)
    {

        if (sequence.size() != 2)
        {
            throw new IllegalArgumentException("expected sequence size of 2");
        }


        contributorId = HeaderInfoContributorId.getInstance(sequence.getObjectAt(0));

        Iterator items = ASN1Sequence.getInstance(sequence.getObjectAt(1)).iterator();
        List extns = new ArrayList();

        while (items.hasNext())
        {
            extns.add(EtsiOriginatingHeaderInfoExtension.getInstance(items.next()));
        }

        this.extns = Collections.unmodifiableList(extns);


    }

    public static ContributedExtensionBlock getInstance(Object src)
    {
        if (src instanceof ContributedExtensionBlock)
        {
            return (ContributedExtensionBlock)src;
        }

        if (src != null)
        {
            return new ContributedExtensionBlock(ASN1Sequence.getInstance(src));
        }

        return null;


    }

    public ASN1Primitive toASN1Primitive()
    {
        return ItsUtils.toSequence(contributorId, ItsUtils.toSequence(extns));
    }

    public HeaderInfoContributorId getContributorId()
    {
        return contributorId;
    }

    public List getExtns()
    {
        return extns;
    }
}