001// SPDX-FileCopyrightText: 2018 Paul Schaub <vanitasvitae@fsfe.org>
002//
003// SPDX-License-Identifier: Apache-2.0
004
005package org.pgpainless.util.selection.keyring;
006
007import javax.annotation.Nonnull;
008import java.util.HashSet;
009import java.util.Iterator;
010import java.util.Set;
011
012import org.bouncycastle.openpgp.PGPPublicKeyRing;
013import org.bouncycastle.openpgp.PGPPublicKeyRingCollection;
014import org.pgpainless.util.MultiMap;
015
016public abstract class PublicKeyRingSelectionStrategy<O> implements KeyRingSelectionStrategy<PGPPublicKeyRing, PGPPublicKeyRingCollection, O> {
017
018    @Override
019    public Set<PGPPublicKeyRing> selectKeyRingsFromCollection(@Nonnull O identifier, @Nonnull PGPPublicKeyRingCollection keyRingCollection) {
020        Set<PGPPublicKeyRing> accepted = new HashSet<>();
021        for (Iterator<PGPPublicKeyRing> i = keyRingCollection.getKeyRings(); i.hasNext(); ) {
022            PGPPublicKeyRing ring = i.next();
023            if (accept(identifier, ring)) accepted.add(ring);
024        }
025        return accepted;
026    }
027
028    @Override
029    public MultiMap<O, PGPPublicKeyRing> selectKeyRingsFromCollections(@Nonnull MultiMap<O, PGPPublicKeyRingCollection> keyRingCollections) {
030        MultiMap<O, PGPPublicKeyRing> keyRings = new MultiMap<>();
031        for (O identifier : keyRingCollections.keySet()) {
032            for (PGPPublicKeyRingCollection collection : keyRingCollections.get(identifier)) {
033                keyRings.put(identifier, selectKeyRingsFromCollection(identifier, collection));
034            }
035        }
036        return keyRings;
037    }
038}