Fix crash when linking upgraded MM

src/main/java/com/recursive_pineapple/matter_manipulator/common/items/manipulator/MMState.java

@@ -56,6 +56,7 @@
 import com.recursive_pineapple.matter_manipulator.common.data.WeightedSpecList;
 import com.recursive_pineapple.matter_manipulator.common.items.MMUpgrades;
 import com.recursive_pineapple.matter_manipulator.common.items.manipulator.ItemMatterManipulator.ManipulatorTier;
+import com.recursive_pineapple.matter_manipulator.common.persist.BitSetJsonAdapter;
 import com.recursive_pineapple.matter_manipulator.common.persist.NBTJsonAdapter;
 import com.recursive_pineapple.matter_manipulator.common.persist.StaticEnumJsonAdapter;
 import com.recursive_pineapple.matter_manipulator.common.persist.UIDJsonAdapter;
@@ -78,6 +79,7 @@ public class MMState {
         .registerTypeAdapter(NBTTagCompound.class, new NBTJsonAdapter())
         .registerTypeAdapter(ForgeDirection.class, new StaticEnumJsonAdapter<>(ForgeDirection.class))
         .registerTypeAdapter(WeightedSpecList.class, new WeightedListJsonAdapter())
+        .registerTypeAdapter(BitSet.class, new BitSetJsonAdapter())
         .create();
 
     @SerializedName("jv")
@@ -91,7 +93,7 @@ public class MMState {
     public double charge;
 
     public BitSet installedUpgrades = new BitSet();
-    public int upgradeProvidedCapabilities;
+    public transient int upgradeProvidedCapabilities;
 
     public transient ItemMatterManipulator manipulator;
 
@@ -148,9 +150,20 @@ private static void migrateJson(JsonObject obj) {
                 config.remove("replaceWhitelist");
                 config.remove("replaceWith");
             }
+
             version = 1;
         }
 
+        if (version == 1) {
+            // Load with the default encoder
+            BitSet bitSet = new Gson().fromJson(obj.get("installedUpgrades"), BitSet.class);
+
+            // Save with the new encoder
+            obj.add("installedUpgrades", GSON.toJsonTree(bitSet));
+
+            version = 2;
+        }
+
         obj.addProperty("jv", version);
     }
 

src/main/java/com/recursive_pineapple/matter_manipulator/common/persist/BitSetJsonAdapter.java

@@ -0,0 +1,33 @@
+package com.recursive_pineapple.matter_manipulator.common.persist;
+
+import java.lang.reflect.Type;
+import java.util.Base64;
+import java.util.BitSet;
+
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+
+public class BitSetJsonAdapter implements JsonSerializer<BitSet>, JsonDeserializer<BitSet> {
+
+    @Override
+    public BitSet deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+        String str = context.deserialize(json, String.class);
+
+        byte[] data = Base64.getDecoder().decode(str);
+
+        return BitSet.valueOf(data);
+    }
+
+    @Override
+    public JsonElement serialize(BitSet src, Type typeOfSrc, JsonSerializationContext context) {
+        byte[] data = src.toByteArray();
+
+        String str = Base64.getEncoder().encodeToString(data);
+
+        return context.serialize(str);
+    }
+}