package com.atlassian.refapp.trustedapps.internal;
   
   import com.atlassian.security.auth.trustedapps.ApplicationCertificate;
   import com.atlassian.security.auth.trustedapps.UserResolver;
   import com.atlassian.user.EntityException;
   import com.atlassian.user.UserManager;
   
   import java.security.Principal;
   
  public class RefAppUserResolverImpl implements UserResolver {
      private final UserManager userManager;
  
      public RefAppUserResolverImpl(UserManager userManager) {
          this.userManager = userManager;
      }
  
      public Principal resolve(ApplicationCertificate certificate) {
          try {
              return userManager.getUser(certificate.getUserName());
          } catch (EntityException e) {
              return null;
          }
      }
  }