Created
April 21, 2025 15:12
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Simple map containing a value paired to two keys. Could be useful.
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| package dev.pvpduels.util; | |
| import java.util.HashMap; | |
| import java.util.Map; | |
| public class TwoKeyedMap<K1, K2, V> { | |
| private final Map<K1, Map<K2, V>> map = new HashMap<>(); | |
| public void put(K1 key1, K2 key2, V value) { | |
| map.computeIfAbsent(key1, k -> new HashMap<>()).put(key2, value); | |
| } | |
| public V get(K1 key1, K2 key2) { | |
| Map<K2, V> innerMap = map.get(key1); | |
| return innerMap != null ? innerMap.get(key2) : null; | |
| } | |
| public boolean containsKeys(K1 key1, K2 key2) { | |
| return map.containsKey(key1) && map.get(key1).containsKey(key2); | |
| } | |
| public V remove(K1 key1, K2 key2) { | |
| Map<K2, V> innerMap = map.get(key1); | |
| if (innerMap != null) { | |
| V value = innerMap.remove(key2); | |
| if (innerMap.isEmpty()) { | |
| map.remove(key1); | |
| } | |
| return value; | |
| } | |
| return null; | |
| } | |
| public void clear() { | |
| map.clear(); | |
| } | |
| public boolean isEmpty() { | |
| return map.isEmpty(); | |
| } | |
| } |
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