package com.srv4pos.server.api.sync.sample;
   
   import com.srv4pos.server.api.seller.SellerInfo;
   import com.srv4pos.server.api.sync.EntitySyncAdapter;
   import com.srv4pos.server.api.sync.Uploader;
   
   public class SellerSyncAdapter implements EntitySyncAdapter<SellerInfo> {
       private final MemoryLocalStorage storage;
   
      public SellerSyncAdapter(MemoryLocalStorage storage) {
          this.storage = storage;
      }
  
      public void upload(Uploader<SellerInfo> uploader) {
          // we don't allow to delete seller, so this method is for seller update only
          if (!storage.isSellerSynced()) {
              uploader.upload(storage.getSeller(), null);
              storage.setSellerSynced(true);
          }
      }
  
      public void createOrUpdateEntityFromInfo(SellerInfo info) {
          // we need only seller name from server
          if (info.getName() == null) {
              storage.setSellerSynced(false); // it means we need to sent seller name in a future (upload)
              return;
          } else {
              storage.setSeller(info);
              storage.setSellerSynced(true);
          }
      }
  }