Fix: added BackgroundFillAdapter and BackgroundTypeAdapter for deserialization (api v7.3)

Author: mircoianese

library/src/main/java/com/pengrad/telegrambot/utility/BotUtils.java

@@ -4,10 +4,14 @@
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import com.pengrad.telegrambot.model.Update;
+import com.pengrad.telegrambot.model.chatbackground.BackgroundFill;
+import com.pengrad.telegrambot.model.chatbackground.BackgroundType;
 import com.pengrad.telegrambot.model.chatboost.source.ChatBoostSource;
 import com.pengrad.telegrambot.model.message.MaybeInaccessibleMessage;
 import com.pengrad.telegrambot.model.message.origin.MessageOrigin;
 import com.pengrad.telegrambot.model.reaction.ReactionType;
+import com.pengrad.telegrambot.utility.gson.BackgroundFillAdapter;
+import com.pengrad.telegrambot.utility.gson.BackgroundTypeAdapter;
 import com.pengrad.telegrambot.utility.gson.ChatBoostSourceTypeAdapter;
 import com.pengrad.telegrambot.utility.gson.MaybeInaccessibleMessageTypeAdapter;
 import com.pengrad.telegrambot.utility.gson.MessageOriginTypeAdapter;
@@ -31,6 +35,8 @@ private BotUtils() {}
             .registerTypeAdapter(MessageOrigin.class, new MessageOriginTypeAdapter())
             .registerTypeAdapter(ChatBoostSource.class, new ChatBoostSourceTypeAdapter())
             .registerTypeAdapter(MaybeInaccessibleMessage.class, new MaybeInaccessibleMessageTypeAdapter())
+            .registerTypeAdapter(BackgroundType.class, new BackgroundTypeAdapter())
+            .registerTypeAdapter(BackgroundFill.class, new BackgroundFillAdapter())
             .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
             .create();
 

library/src/main/java/com/pengrad/telegrambot/utility/gson/BackgroundFillAdapter.java

@@ -0,0 +1,28 @@
+package com.pengrad.telegrambot.utility.gson;
+
+import com.google.gson.*;
+import com.pengrad.telegrambot.model.chatbackground.BackgroundFill;
+import com.pengrad.telegrambot.model.chatbackground.BackgroundFillFreeformGradient;
+import com.pengrad.telegrambot.model.chatbackground.BackgroundFillGradient;
+import com.pengrad.telegrambot.model.chatbackground.BackgroundFillSolid;
+
+import java.lang.reflect.Type;
+
+public class BackgroundFillAdapter implements JsonDeserializer<BackgroundFill> {
+
+    @Override
+    public BackgroundFill deserialize(JsonElement element, Type type, JsonDeserializationContext context) throws JsonParseException {
+        JsonObject object = element.getAsJsonObject();
+        String discriminator = object.getAsJsonPrimitive("type").getAsString();
+
+        if (BackgroundFillSolid.TYPE.equals(discriminator)) {
+            return context.deserialize(object, BackgroundFillSolid.class);
+        } else if (BackgroundFillGradient.TYPE.equals(discriminator)) {
+            return context.deserialize(object, BackgroundFillGradient.class);
+        } else if (BackgroundFillFreeformGradient.TYPE.equals(discriminator)) {
+            return context.deserialize(object, BackgroundFillFreeformGradient.class);
+        }
+
+        return context.deserialize(object, BackgroundFill.class);
+    }
+}

library/src/main/java/com/pengrad/telegrambot/utility/gson/BackgroundTypeAdapter.java

@@ -0,0 +1,31 @@
+package com.pengrad.telegrambot.utility.gson;
+
+import com.google.gson.*;
+import com.pengrad.telegrambot.model.chatbackground.BackgroundType;
+import com.pengrad.telegrambot.model.chatbackground.BackgroundTypeChatTheme;
+import com.pengrad.telegrambot.model.chatbackground.BackgroundTypeFill;
+import com.pengrad.telegrambot.model.chatbackground.BackgroundTypePattern;
+import com.pengrad.telegrambot.model.chatbackground.BackgroundTypeWallpaper;
+
+import java.lang.reflect.Type;
+
+public class BackgroundTypeAdapter implements JsonDeserializer<BackgroundType> {
+
+    @Override
+    public BackgroundType deserialize(JsonElement element, Type type, JsonDeserializationContext context) throws JsonParseException {
+        JsonObject object = element.getAsJsonObject();
+        String discriminator = object.getAsJsonPrimitive("type").getAsString();
+
+        if (BackgroundTypeFill.TYPE.equals(discriminator)) {
+            return context.deserialize(object, BackgroundTypeFill.class);
+        } else if (BackgroundTypeWallpaper.TYPE.equals(discriminator)) {
+            return context.deserialize(object, BackgroundTypeWallpaper.class);
+        } else if (BackgroundTypePattern.TYPE.equals(discriminator)) {
+            return context.deserialize(object, BackgroundTypePattern.class);
+        } else if (BackgroundTypeChatTheme.TYPE.equals(discriminator)) {
+            return context.deserialize(object, BackgroundTypeChatTheme.class);
+        }
+
+        return context.deserialize(object, BackgroundType.class);
+    }
+}