feat(api): PlainLoadingCache

src/main/java/org/auioc/mcmod/arnicalib/api/java/cache/PlainLoadingCache.java

@@ -0,0 +1,40 @@
+package org.auioc.mcmod.arnicalib.api.java.cache;
+
+import java.util.HashMap;
+import java.util.function.Function;
+import javax.annotation.Nonnull;
+
+public class PlainLoadingCache<K, V> implements LoadingCache<K, V> {
+
+    private final HashMap<K, V> map = new HashMap<K, V>();
+    private final Function<K, V> loader;
+
+    public PlainLoadingCache(Function<K, V> loader) {
+        this.loader = loader;
+    }
+
+    @Nonnull
+    @Override
+    public V get(K key) {
+        return (map.containsKey(key)) ? map.get(key) : load(key);
+    }
+
+    @Nonnull
+    @Override
+    public V load(K key) {
+        V value = loader.apply(key);
+        map.put(key, value);
+        return value;
+    }
+
+
+    @Override
+    public void clear() {
+        map.clear();
+    }
+
+    public void refresh(K key) {
+        load(key);
+    }
+
+}