feature: add project files

src/main/java/io/github/axolotsh/registrylib/KeyAdapter.java

@@ -0,0 +1,28 @@
+package io.github.axolotsh.registrylib;
+
+import java.lang.reflect.Type;
+
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonPrimitive;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+
+import net.kyori.adventure.key.Key;
+
+/**
+ * Overrides the serialization logic of {@link Key}, causing it to be serialized
+ * and deserialized as {@link String}.
+ */
+public class KeyAdapter implements JsonSerializer<Key>, JsonDeserializer<Key> {
+    @Override
+    public JsonElement serialize(Key src, Type typeOfSrc, JsonSerializationContext context) {
+        return new JsonPrimitive(src.asString());
+    }
+
+    @Override
+    public Key deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) {
+        return Key.key(json.getAsString());
+    }
+}