mirror of
https://codeberg.org/Freeyourgadget/Gadgetbridge
synced 2024-09-08 07:28:32 +02:00
43 lines
1.5 KiB
Java
43 lines
1.5 KiB
Java
/* Copyright (C) 2022 José Rebelo
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Gadgetbridge is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.util;
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import java.util.HashMap;
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import java.util.Map;
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public final class MapUtils {
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/**
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* Reverses a map. If there are multiple values for the same key, the first one will take precedence.
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*
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* @param map the map to reverse
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* @param <V> the type for the values
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* @param <K> the type for the keys
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* @return the reversed map
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*/
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public static <V, K> Map<V, K> reverse(final Map<K, V> map) {
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final Map<V, K> reversed = new HashMap<>();
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for (final Map.Entry<K, V> entry : map.entrySet()) {
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if (!reversed.containsKey(entry.getValue())) {
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reversed.put(entry.getValue(), entry.getKey());
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}
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}
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return reversed;
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}
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}
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