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The Bouncy Castle Java API for handling the OpenPGP protocol. This jar contains the OpenPGP API for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.openpgp;

import java.util.Iterator;
import java.util.List;
import java.util.Map;

class KeyRingIterator
    implements Iterator
{
    private final Iterator iterator;
    private final Map rings;

    KeyRingIterator(List ids, Map rings)
    {
        this.iterator = ids.iterator();
        this.rings = rings;
    }

    public boolean hasNext()
    {
        return iterator.hasNext();
    }

    public T next()
    {
        return rings.get(iterator.next());
    }
    
    public void remove()
    {
        throw new UnsupportedOperationException("remove not available");
    }
}