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using System;
using System.Collections;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Cms
{
public class RecipientInformationStore
{
private readonly IList all; //ArrayList[RecipientInformation]
private readonly IDictionary table = Platform.CreateHashtable(); // Hashtable[RecipientID, ArrayList[RecipientInformation]]
public RecipientInformationStore(
ICollection recipientInfos)
{
foreach (RecipientInformation recipientInformation in recipientInfos)
{
RecipientID rid = recipientInformation.RecipientID;
IList list = (IList)table[rid];
if (list == null)
{
table[rid] = list = Platform.CreateArrayList(1);
}
list.Add(recipientInformation);
}
this.all = Platform.CreateArrayList(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)
{
IList list = (IList) 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 Platform.CreateArrayList(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)
{
IList list = (IList)table[selector];
return list == null ? Platform.CreateArrayList() : Platform.CreateArrayList(list);
}
}
}
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