package cn.home1.oss.lib.common;
   
   import com.google.gson.Gson;
   import com.google.gson.GsonBuilder;
   import com.google.gson.JsonDeserializer;
   import com.google.gson.JsonPrimitive;
   import com.google.gson.JsonSerializer;
   
   import org.springframework.security.core.GrantedAuthority;
  import org.springframework.security.core.authority.SimpleGrantedAuthority;
  
  /**
   * TODO remove all SimpleGrantedAuthority.
   * Created by Meifans on 17/1/9.
   */
  public final class GsonUtils {
  
    public static Gson setup(final GsonBuilder builder) {
      return builder
        .registerTypeAdapter(GrantedAuthority.class, getAuthoritySerializer())
        .registerTypeAdapter(GrantedAuthority.class, getAuthorityDeSerializer()).create();
    }
  
    private static JsonDeserializer<GrantedAuthority> getAuthorityDeSerializer() {
      return (json, typeOfT, context) -> //
        new SimpleGrantedAuthority(json.getAsString());
    }
  
    private static JsonSerializer<GrantedAuthority> getAuthoritySerializer() {
      return (authority, typeOfSrc, context) -> new JsonPrimitive(authority.getAuthority());
    }
  }