Example of Using Hibernate Create Criteria for a complex query in Grails

getListOfCustomersForSearchCustomer

List<Account> getListOfCustomersForSearchCustomer(String firstName, String lastName, String phoneNumber, String accountNumber)
	{
		return Account.createCriteria().list {
			
			or {
				eq("accountNumber", accountNumber)
			
				user {
						
					or {
						eq("firstName", firstName)
						eq("lastName", lastName)
						eq("phoneNumber", phoneNumber)
					}
				}
			}
		}
	}
}

This method RETURNS the list of accounts WHERE Account.accountNumber equals the same as parameter value OR + EITHER firstName, lastName OR phoneNumber are same as User.firstName, User.lastName OR User.phoneNumber.