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package io.gatling.recorder.internal.bouncycastle.cms;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import io.gatling.recorder.internal.bouncycastle.asn1.x500.X500Name;
import io.gatling.recorder.internal.bouncycastle.util.Iterable;

public class RecipientInformationStore
    implements Iterable
{
    private final List all; //ArrayList[RecipientInformation]
    private final Map table = new HashMap(); // HashMap[RecipientID, ArrayList[RecipientInformation]]

    /**
     * Create a store containing a single RecipientInformation object.
     *
     * @param recipientInformation the signer information to contain.
     */
    public RecipientInformationStore(
        RecipientInformation  recipientInformation)
    {
        this.all = new ArrayList(1);
        this.all.add(recipientInformation);

        RecipientId sid = recipientInformation.getRID();

        table.put(sid, all);
    }

    public RecipientInformationStore(
        Collection recipientInfos)
    {
        Iterator it = recipientInfos.iterator();

        while (it.hasNext())
        {
            RecipientInformation recipientInformation = (RecipientInformation)it.next();
            RecipientId rid = recipientInformation.getRID();

            List list = (ArrayList)table.get(rid);
            if (list == null)
            {
                list = new ArrayList(1);
                table.put(rid, list);
            }

            list.add(recipientInformation);
        }

        this.all = new ArrayList(recipientInfos);
    }

    /**
     * Return the first RecipientInformation object that matches the
     * passed in selector. Null if there are no matches.
     *
     * @param selector to identify a recipient
     * @return a single RecipientInformation object. Null if none matches.
     */
    public RecipientInformation get(
        RecipientId selector)
    {
        Collection list = getRecipients(selector);

        return list.size() == 0 ? null : (RecipientInformation)list.iterator().next();
    }

    /**
     * Return the number of recipients in the collection.
     *
     * @return number of recipients identified.
     */
    public int size()
    {
        return all.size();
    }

    /**
     * Return all recipients in the collection
     *
     * @return a collection of recipients.
     */
    public Collection getRecipients()
    {
        return new ArrayList(all);
    }

    /**
     * Return possible empty collection with recipients matching the passed in RecipientId
     *
     * @param selector a recipient id to select against.
     * @return a collection of RecipientInformation objects.
     */
    public Collection getRecipients(
        RecipientId selector)
    {
        if (selector instanceof KeyTransRecipientId)
        {
            KeyTransRecipientId keyTrans = (KeyTransRecipientId)selector;

            X500Name issuer = keyTrans.getIssuer();
            byte[] subjectKeyId = keyTrans.getSubjectKeyIdentifier();

            if (issuer != null && subjectKeyId != null)
            {
                List results = new ArrayList();

                Collection match1 = getRecipients(new KeyTransRecipientId(issuer, keyTrans.getSerialNumber()));
                if (match1 != null)
                {
                    results.addAll(match1);
                }

                Collection match2 = getRecipients(new KeyTransRecipientId(subjectKeyId));
                if (match2 != null)
                {
                    results.addAll(match2);
                }

                return results;
            }
        }

        List list = (ArrayList)table.get(selector);

        return list == null ? new ArrayList() : new ArrayList(list);
    }


    /**
     * Support method for Iterable where available.
     */
    public Iterator iterator()
    {
        return getRecipients().iterator();
    }
}