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The Bouncy Castle Java CMS and S/MIME APIs for handling the CMS and S/MIME protocols. This jar contains CMS and S/MIME APIs for JDK 1.6. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs. If the S/MIME API is used, the JavaMail API and the Java activation framework will also be needed.
package org.bouncycastle.cms;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Iterator;
import java.util.List;
public class SignerInformationStore
{
private Map table = new HashMap();
public SignerInformationStore(
Collection signerInfos)
{
Iterator it = signerInfos.iterator();
while (it.hasNext())
{
SignerInformation signer = (SignerInformation)it.next();
SignerId sid = signer.getSID();
if (table.get(sid) == null)
{
table.put(sid, signer);
}
else
{
Object o = table.get(sid);
if (o instanceof List)
{
((List)o).add(signer);
}
else
{
List l = new ArrayList();
l.add(o);
l.add(signer);
table.put(sid, l);
}
}
}
}
/**
* Return the first SignerInformation object that matches the
* passed in selector. Null if there are no matches.
*
* @param selector to identify a signer
* @return a single SignerInformation object. Null if none matches.
*/
public SignerInformation get(
SignerId selector)
{
Object o = table.get(selector);
if (o instanceof List)
{
return (SignerInformation)((List)o).get(0);
}
else
{
return (SignerInformation)o;
}
}
/**
* Return the number of signers in the collection.
*
* @return number of signers identified.
*/
public int size()
{
Iterator it = table.values().iterator();
int count = 0;
while (it.hasNext())
{
Object o = it.next();
if (o instanceof List)
{
count += ((List)o).size();
}
else
{
count++;
}
}
return count;
}
/**
* Return all signers in the collection
*
* @return a collection of signers.
*/
public Collection getSigners()
{
List list = new ArrayList(table.size());
Iterator it = table.values().iterator();
while (it.hasNext())
{
Object o = it.next();
if (o instanceof List)
{
list.addAll((List)o);
}
else
{
list.add(o);
}
}
return list;
}
/**
* Return possible empty collection with signers matching the passed in SignerId
*
* @param selector a signer id to select against.
* @return a collection of SignerInformation objects.
*/
public Collection getSigners(
SignerId selector)
{
Object o = table.get(selector);
if (o instanceof List)
{
return new ArrayList((List)o);
}
else if (o != null)
{
return Collections.singletonList(o);
}
return new ArrayList();
}
}