using System;
using System.Collections;
namespace Org.BouncyCastle.Cms{
public class RecipientInformationStore
{
private readonly ArrayList all; //ArrayList[RecipientInformation]
private readonly Hashtable table = new Hashtable(); // Hashtable[RecipientID, ArrayList[RecipientInformation]]
public RecipientInformationStore(
ICollection recipientInfos)
{
foreach (RecipientInformation recipientInformation in recipientInfos)
{
RecipientID rid = recipientInformation.RecipientID;
ArrayList list = (ArrayList) table[rid];
if (list == null)
{
table[rid] = list = new ArrayList(1);
}
list.Add(recipientInformation);
}
this.all = new ArrayList(recipientInfos);
}
public RecipientInformation this[RecipientID selector]
{
get { return GetFirstRecipient(selector); }
}
/**
* 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 GetFirstRecipient(
RecipientID selector)
{
ArrayList list = (ArrayList) table[selector];
return list == null ? null : (RecipientInformation) list[0];
}
/**
* Return the number of recipients in the collection.
*
* @return number of recipients identified.
*/
public int Count
{
get { return all.Count; }
}
/**
* Return all recipients in the collection
*
* @return a collection of recipients.
*/
public ICollection 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 ICollection GetRecipients(
RecipientID selector)
{
ArrayList list = (ArrayList) table[selector];
return list == null ? new ArrayList() : new ArrayList(list);
}
}
}
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