From 755452cd3c76597fb9fd2fa8da6f4b61c6d5f853 Mon Sep 17 00:00:00 2001
From: tastybento <tastybento@users.noreply.github.com>
Date: Wed, 3 Jul 2024 15:43:17 -0700
Subject: [PATCH] Added support for serializing Pairs

---
 .../json/BentoboxTypeAdapterFactory.java      |  4 ++
 .../json/adapters/PairTypeAdapter.java        | 41 +++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 src/main/java/world/bentobox/bentobox/database/json/adapters/PairTypeAdapter.java

diff --git a/src/main/java/world/bentobox/bentobox/database/json/BentoboxTypeAdapterFactory.java b/src/main/java/world/bentobox/bentobox/database/json/BentoboxTypeAdapterFactory.java
index a8faa19e1..9f90a4793 100644
--- a/src/main/java/world/bentobox/bentobox/database/json/BentoboxTypeAdapterFactory.java
+++ b/src/main/java/world/bentobox/bentobox/database/json/BentoboxTypeAdapterFactory.java
@@ -25,9 +25,11 @@ import world.bentobox.bentobox.database.json.adapters.FlagTypeAdapter;
 import world.bentobox.bentobox.database.json.adapters.ItemStackTypeAdapter;
 import world.bentobox.bentobox.database.json.adapters.LocationTypeAdapter;
 import world.bentobox.bentobox.database.json.adapters.MaterialTypeAdapter;
+import world.bentobox.bentobox.database.json.adapters.PairTypeAdapter;
 import world.bentobox.bentobox.database.json.adapters.PotionEffectTypeAdapter;
 import world.bentobox.bentobox.database.json.adapters.VectorTypeAdapter;
 import world.bentobox.bentobox.database.json.adapters.WorldTypeAdapter;
+import world.bentobox.bentobox.util.Pair;
 
 
 /**
@@ -74,6 +76,8 @@ public class BentoboxTypeAdapterFactory implements TypeAdapterFactory {
             return (TypeAdapter<T>) new WorldTypeAdapter();
         } else if (Vector.class.isAssignableFrom(rawType)) {
             return (TypeAdapter<T>) new VectorTypeAdapter();
+        } else if (Pair.class.isAssignableFrom(rawType)) {
+            return (TypeAdapter<T>) new PairTypeAdapter<>();
         } else if (ConfigurationSerializable.class.isAssignableFrom(rawType)) {
             // This covers a lot of Bukkit objects
             return (TypeAdapter<T>) new BukkitObjectTypeAdapter(gson.getAdapter(Map.class));
diff --git a/src/main/java/world/bentobox/bentobox/database/json/adapters/PairTypeAdapter.java b/src/main/java/world/bentobox/bentobox/database/json/adapters/PairTypeAdapter.java
new file mode 100644
index 000000000..20d0fe7cb
--- /dev/null
+++ b/src/main/java/world/bentobox/bentobox/database/json/adapters/PairTypeAdapter.java
@@ -0,0 +1,41 @@
+package world.bentobox.bentobox.database.json.adapters;
+
+import java.io.IOException;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+
+import com.google.gson.Gson;
+import com.google.gson.TypeAdapter;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+
+import world.bentobox.bentobox.util.Pair;
+
+// Custom TypeAdapter for Pair<X, Z>
+public class PairTypeAdapter<X, Z> extends TypeAdapter<Pair<X, Z>> {
+
+    @Override
+    public void write(JsonWriter out, Pair<X, Z> pair) throws IOException {
+        if (pair == null || pair.getKey() == null || pair.getValue() == null) {
+            return;
+        }
+        out.beginArray();
+        out.value(new Gson().toJson(pair.getKey()));
+        out.value(new Gson().toJson(pair.getValue()));
+        out.endArray();
+    }
+
+    @Override
+    public Pair<X, Z> read(JsonReader in) throws IOException {
+        in.beginArray();
+        Type typeX = ((ParameterizedType) this.getClass().getGenericSuperclass()).getActualTypeArguments()[0];
+        X x = new Gson().fromJson(in.nextString(), typeX);
+        Type typeZ = ((ParameterizedType) this.getClass().getGenericSuperclass()).getActualTypeArguments()[1];
+        Z z = new Gson().fromJson(in.nextString(), typeZ);
+        in.endArray();
+        if (x == null || z == null) {
+            return null;
+        }
+        return new Pair<>(x, z);
+    }
+}
\ No newline at end of file