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package org.spongycastle.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 org.spongycastle.asn1.x500.X500Name;
public class RecipientInformationStore
{
private final List all; //ArrayList[RecipientInformation]
private final Map table = new HashMap(); // HashMap[RecipientID, ArrayList[RecipientInformation]]
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);
}
}
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