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using System;
using System.Collections.Generic;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Cms
{
public class RecipientInformationStore
: IEnumerable<RecipientInformation>
{
private readonly IList<RecipientInformation> m_all;
private readonly IDictionary<RecipientID, IList<RecipientInformation>> m_table =
new Dictionary<RecipientID, IList<RecipientInformation>>();
public RecipientInformationStore(IEnumerable<RecipientInformation> recipientInfos)
{
foreach (RecipientInformation recipientInformation in recipientInfos)
{
RecipientID rid = recipientInformation.RecipientID;
if (!m_table.TryGetValue(rid, out var list))
{
m_table[rid] = list = new List<RecipientInformation>(1);
}
list.Add(recipientInformation);
}
m_all = new List<RecipientInformation>(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)
{
if (!m_table.TryGetValue(selector, out var list))
return null;
return list[0];
}
/**
* Return the number of recipients in the collection.
*
* @return number of recipients identified.
*/
public int Count
{
get { return m_all.Count; }
}
/**
* Return all recipients in the collection
*
* @return a collection of recipients.
*/
public IList<RecipientInformation> GetRecipients()
{
return new List<RecipientInformation>(m_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 IList<RecipientInformation> GetRecipients(RecipientID selector)
{
if (!m_table.TryGetValue(selector, out var list))
return new List<RecipientInformation>(0);
return new List<RecipientInformation>(list);
}
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
public virtual IEnumerator<RecipientInformation> GetEnumerator()
{
return GetRecipients().GetEnumerator();
}
}
}
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