TableDataDeserializer.java

import com.google.gson.JsonArray;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;

import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public abstract class TableDataDeserializer<T> implements JsonDeserializer<T> {

    private final List<String> tableNameList = new ArrayList<>();

    protected void addTableName(String... tableName) {
        if (tableName != null && tableName.length > 0) {
            Collections.addAll(tableNameList, tableName);
        }
    }

    @Override
    public T deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
        JsonArray jsonArray = json.getAsJsonArray();
        if (jsonArray.size() == 0) {
            return null;
        }
        T returnedData = getInstance();
        for (int i = 0; i < jsonArray.size(); i++) {
            JsonElement tableElement = jsonArray.get(i);
            JsonObject tableJsonObject = tableElement.getAsJsonObject();
            String tableName = tableJsonObject.get("TableName").getAsString();
            if (tableNameList.contains(tableName)) {
                onDetectTableName(tableName, tableJsonObject, returnedData, context);
            }
        }
        return returnedData;
    }

    protected abstract void onDetectTableName(String tableName, JsonObject tableJsonObject, T returnedData, JsonDeserializationContext context);

    public abstract T getInstance();
}