Adding in a preprocessor to avoid using the SerializedName annotation.

src/com/massivecraft/factions/Factions.java

@@ -4,6 +4,7 @@ import com.massivecraft.factions.adapter.BoardAdapter;
 import com.massivecraft.factions.adapter.BoardMapAdapter;
 import com.massivecraft.factions.adapter.FFlagAdapter;
 import com.massivecraft.factions.adapter.FPermAdapter;
+import com.massivecraft.factions.adapter.FactionPreprocessAdapter;
 import com.massivecraft.factions.adapter.RelAdapter;
 import com.massivecraft.factions.adapter.TerritoryAccessAdapter;
 import com.massivecraft.factions.chat.modifier.ChatModifierLc;
@@ -21,6 +22,7 @@ import com.massivecraft.factions.chat.tag.ChatTagTitle;
 import com.massivecraft.factions.cmd.*;
 import com.massivecraft.factions.entity.Board;
 import com.massivecraft.factions.entity.BoardColls;
+import com.massivecraft.factions.entity.Faction;
 import com.massivecraft.factions.entity.UPlayerColls;
 import com.massivecraft.factions.entity.FactionColls;
 import com.massivecraft.factions.entity.MConfColl;
@@ -41,6 +43,7 @@ import com.massivecraft.mcore.usys.Aspect;
 import com.massivecraft.mcore.usys.AspectColl;
 import com.massivecraft.mcore.usys.Multiverse;
 import com.massivecraft.mcore.util.MUtil;
+import com.massivecraft.mcore.xlib.gson.Gson;
 import com.massivecraft.mcore.xlib.gson.GsonBuilder;
 
 
@@ -76,6 +79,9 @@ public class Factions extends MPlugin
 	public PowerMixin getPowerMixin() { return this.powerMixin == null ? PowerMixinDefault.get() : this.powerMixin; }
 	public void setPowerMixin(PowerMixin powerMixin) { this.powerMixin = powerMixin; }
 	
+	// Gson without preprocessors
+	public final Gson gsonWithoutPreprocessors = this.getGsonBuilderWithotPreprocessors().create();
+
 	// -------------------------------------------- //
 	// OVERRIDE
 	// -------------------------------------------- //
@@ -153,8 +159,7 @@ public class Factions extends MPlugin
 		postEnable();
 	}
 	
-	@Override
-	public GsonBuilder getGsonBuilder()
+	public GsonBuilder getGsonBuilderWithotPreprocessors()
 	{
 		return super.getGsonBuilder()
 		.registerTypeAdapter(TerritoryAccess.class, TerritoryAccessAdapter.get())
@@ -166,4 +171,12 @@ public class Factions extends MPlugin
 		;
 	}
 	
+	@Override
+	public GsonBuilder getGsonBuilder()
+	{
+		return this.getGsonBuilderWithotPreprocessors()
+		.registerTypeAdapter(Faction.class, FactionPreprocessAdapter.get())
+		;
+	}
+	
 }

src/com/massivecraft/factions/adapter/FactionPreprocessAdapter.java

@@ -0,0 +1,53 @@
+package com.massivecraft.factions.adapter;
+
+import java.lang.reflect.Type;
+
+import com.massivecraft.mcore.xlib.gson.JsonDeserializationContext;
+import com.massivecraft.mcore.xlib.gson.JsonDeserializer;
+import com.massivecraft.mcore.xlib.gson.JsonElement;
+import com.massivecraft.mcore.xlib.gson.JsonObject;
+import com.massivecraft.mcore.xlib.gson.JsonParseException;
+
+import com.massivecraft.factions.Factions;
+import com.massivecraft.factions.entity.Faction;
+
+public class FactionPreprocessAdapter implements JsonDeserializer<Faction>
+{
+	// -------------------------------------------- //
+	// INSTANCE & CONSTRUCT
+	// -------------------------------------------- //
+	
+	private static FactionPreprocessAdapter i = new FactionPreprocessAdapter();
+	public static FactionPreprocessAdapter get() { return i; }
+	
+	// -------------------------------------------- //
+	// OVERRIDE
+	// -------------------------------------------- //
+	
+	@Override
+	public Faction deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException
+	{
+		preprocess(json);
+		return Factions.get().gsonWithoutPreprocessors.fromJson(json, typeOfT);
+	}
+	
+	public void preprocess(JsonElement json)
+	{
+		JsonObject jsonObject = json.getAsJsonObject();
+		
+		// Renamed fields
+		// 1.8.X --> 2.0.0
+		rename(jsonObject, "tag", "name");
+		rename(jsonObject, "invites", "invitedPlayerIds");
+		rename(jsonObject, "relationWish", "relationWishes");
+		rename(jsonObject, "flagOverrides", "flags");
+		rename(jsonObject, "permOverrides", "perms");
+	}
+	
+	public void rename(final JsonObject jsonObject, final String from, final String to)
+	{
+		JsonElement element = jsonObject.remove(from);
+		if (element != null) jsonObject.add(to, element);
+	}
+	
+}

src/com/massivecraft/factions/entity/BoardColls.java

@@ -57,6 +57,7 @@ public class BoardColls extends XColls<BoardColl, Board> implements BoardInterfa
 		this.migrate();
 	}
 	
+	// This method is for the 1.8.X --> 2.0.0 migration
 	public void migrate()
 	{
 		// Create file objects

src/com/massivecraft/factions/entity/Faction.java

@@ -22,7 +22,6 @@ import com.massivecraft.mcore.ps.PS;
 import com.massivecraft.mcore.store.Entity;
 import com.massivecraft.mcore.util.MUtil;
 import com.massivecraft.mcore.util.SenderUtil;
-import com.massivecraft.mcore.xlib.gson.annotations.SerializedName;
 
 
 public class Faction extends Entity<Faction> implements EconomyParticipator
@@ -65,7 +64,6 @@ public class Faction extends Entity<Faction> implements EconomyParticipator
 	// The actual faction id looks something like "54947df8-0e9e-4471-a2f9-9af509fb5889" and that is not too easy to remember for humans.
 	// Thus we make use of a name. Since the id is used in all foreign key situations changing the name is fine.
 	// Null should never happen. The name must not be null.
-	@SerializedName("tag")
 	private String name = null;
 	
 	// Factions can optionally set a description for themselves.
@@ -92,22 +90,18 @@ public class Faction extends Entity<Faction> implements EconomyParticipator
 	// This is the ids of the invited players.
 	// They are actually "senderIds" since you can invite "@console" to your faction.
 	// Null means no one is invited
-	@SerializedName("invites")
 	private Set<String> invitedPlayerIds = null;
 	
 	// The keys in this map are factionIds.
 	// Null means no special relation whishes.
-	@SerializedName("relationWish")
 	private Map<String, Rel> relationWishes = null;
 	
 	// The flag overrides are modifications to the default values.
 	// Null means default for the universe.
-	@SerializedName("flagOverrides")
 	private Map<FFlag, Boolean> flags = null;
 
 	// The perm overrides are modifications to the default values.
 	// Null means default for the universe.
-	@SerializedName("permOverrides")
 	private Map<FPerm, Set<Rel>> perms = null;
 	
 	// -------------------------------------------- //

src/com/massivecraft/factions/entity/FactionColls.java

@@ -51,6 +51,7 @@ public class FactionColls extends XColls<FactionColl, Faction>
 		this.migrate();
 	}
 	
+	// This method is for the 1.8.X --> 2.0.0 migration
 	public void migrate()
 	{
 		// Create file objects

src/com/massivecraft/factions/entity/UPlayerColls.java

@@ -51,6 +51,7 @@ public class UPlayerColls extends XColls<UPlayerColl, UPlayer>
 		this.migrate();
 	}
 	
+	// This method is for the 1.8.X --> 2.0.0 migration
 	public void migrate()
 	{
 		// Create file objects