[jira] [Commented] (JENA-1513) ResultSetLang.init() not called when necessary

["Rob Vesse (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JENA-1513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16417151#comment-16417151 ] 

Rob Vesse commented on JENA-1513:
---------------------------------

This has been fixed for a long time.  If you are experiencing this with current versions then your application is blocking system initialisation somehow - https://jena.apache.org/documentation/notes/system-initialization.html

Are you repackaging the JARs somehow?  In which case you need to ensure that {{ServiceLoader}} manifests are being appropriately combined e.g. by using [ServicesResourceTransformer|https://maven.apache.org/plugins/maven-shade-plugin/examples/resource-transformers.html#ServicesResourceTransformer] as Jena uses these to decide what to initialise

Or you can explicitly call {{JenaSystem.init()}} at the entry point for your application, however if the necessary manifests are missing you can still end up with broken initialisation since this internally relies upon service manifests

> ResultSetLang.init() not called when necessary
> ----------------------------------------------
>
>                 Key: JENA-1513
>                 URL: https://issues.apache.org/jira/browse/JENA-1513
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: ARQ
>    Affects Versions: Jena 3.6.0
>            Reporter: Elie Roux
>            Priority: Major
>
> This seems to be similar to [1264|https://issues.apache.org/jira/browse/JENA-1264]:
> When I execute:
> {code:java}
>     public void testInit() {
>         String sparqljson = "{\n" + 
>                 "  \"head\" : {\n" + 
>                 "    \"vars\" : [ \"work\" ]\n" + 
>                 "  },\n" + 
>                 "  \"results\" : {\n" + 
>                 "    \"bindings\" : [ ]\n" + 
>                 "  }\n" + 
>                 "}";
>         InputStream stream = new ByteArrayInputStream(sparqljson.getBytes(StandardCharsets.UTF_8));
>         //ResultSetLang.init();
>         ResultSet res = ResultSetMgr.read(stream, ResultSetLang.SPARQLResultSetJSON);
>     }{code}
> I'm getting
> {code:java}
> org.apache.jena.riot.RiotException: No parser registered for content type: application/sparql-results+json
>   at org.apache.jena.riot.ResultSetMgr.process(ResultSetMgr.java:89)
>   at org.apache.jena.riot.ResultSetMgr.read(ResultSetMgr.java:52){code}
> while when I uncomment
> {code:java}
> ResultSetLang.init();{code}
> the error disappears.



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