[jira] [Created] (JENA-1955) Make use of Optional or NoSuchElementException

["Jan Martin Keil (Jira)" <ji...@apache.org>]

Jan Martin Keil created JENA-1955:
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             Summary: Make use of Optional or NoSuchElementException
                 Key: JENA-1955
                 URL: https://issues.apache.org/jira/browse/JENA-1955
             Project: Apache Jena
          Issue Type: Improvement
            Reporter: Jan Martin Keil


Many methods currently return {{null}} or an empty String, if something was not present. It would significantly ease writing stable and fault-tolerant code, if this methods would be replaced be methods returning an {{java.util.Optional}} (preferred) or throwing an {{NoSuchElementException}} instead.

Best way to do that would probably be to deprecate the current methods for the time being and add new methods using {{java.util.Optional}} or {{NoSuchElementException}}.

An probably incomplete/example list of affected methods:
* {{QuerySolution#get(String)}}
* {{QuerySolution#getResource(String)}}
* {{QuerySolution#getLiteral(String)}}
* {{Literal#getLanguage()}}



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