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.PGPSecretKeyRing;
013import org.bouncycastle.openpgp.PGPSecretKeyRingCollection;
014import org.pgpainless.util.MultiMap;
015
016public abstract class SecretKeyRingSelectionStrategy<O> implements KeyRingSelectionStrategy<PGPSecretKeyRing, PGPSecretKeyRingCollection, O> {
017    @Override
018    public Set<PGPSecretKeyRing> selectKeyRingsFromCollection(O identifier, @Nonnull PGPSecretKeyRingCollection keyRingCollection) {
019        Set<PGPSecretKeyRing> accepted = new HashSet<>();
020        for (Iterator<PGPSecretKeyRing> i = keyRingCollection.getKeyRings(); i.hasNext(); ) {
021            PGPSecretKeyRing ring = i.next();
022            if (accept(identifier, ring)) accepted.add(ring);
023        }
024        return accepted;
025    }
026
027    @Override
028    public MultiMap<O, PGPSecretKeyRing> selectKeyRingsFromCollections(@Nonnull MultiMap<O, PGPSecretKeyRingCollection> keyRingCollections) {
029        MultiMap<O, PGPSecretKeyRing> keyRings = new MultiMap<>();
030        for (O identifier : keyRingCollections.keySet()) {
031            for (PGPSecretKeyRingCollection collection : keyRingCollections.get(identifier)) {
032                keyRings.put(identifier, selectKeyRingsFromCollection(identifier, collection));
033            }
034        }
035        return keyRings;
036    }
037}