package com.srv4pos.server.api.sale;
   
   import flexjson.JSONDeserializer;
   import flexjson.transformer.DateTransformer;
   import org.springframework.roo.addon.javabean.RooJavaBean;
   import org.springframework.roo.addon.json.RooJson;
   import org.springframework.roo.addon.tostring.RooToString;
   
   import javax.validation.constraints.Min;
  import javax.validation.constraints.NotNull;
  import java.util.Date;
  import java.util.Map;
  
  @RooJavaBean
  @RooToString
  @RooJson(deepSerialize = true, fromJsonMethod = "")
  public class SaleStatsInfo {
  
      /**
       * Total stats by sales brutto.
       */
      @Min(0)
      private long total;
  
      /**
       * Total amount of sales.
       */
      @Min(0)
      private long amountOfSales;
  
      /**
       * Total amount of sold products.
       */
      @Min(0)
      private double amountOfProducts;
  
      /**
       * Date-to-brutto stats grouped by some period (i.e. 'day' or 'hour').
       */
      @NotNull
      private Map<Date, Long> bruttoStats;
  
      /**
       * How sales brutto stats is grouped.
       */
      @NotNull
      private String dateGroupingUnit;
  
      // auto generating of this method disabled since we have to do a parse given date format
      public static SaleStatsInfo fromJsonToSaleStatsInfo(String json) {
          return new JSONDeserializer<SaleStatsInfo>()
                  .use(null, SaleStatsInfo.class)
                  .use(new DateTransformer("yyyy-MM-dd'T'HH:mm:ss.SSSZ"), "bruttoStats.keys")
                  .deserialize(json);
      }
  }