Re: getting the query from an SXP expression

For Jena, we don't use assemblies - we use the shade pluguin.
Maybe jar-with-dependencies has a similar feature.

If you are shading to get the jar,
   https://jena.apache.org/documentation/notes/jena-repack.html

it needs the services files merged.

  <transformers>
       <transformer
 
implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
       ... other transformers ...
     </transformers>

which merges the
  META-INF/services/org.apache.jena.sys.JenaSubsystemLifecycle

files from each dependency and they drive initialization (java's 
ServiceLoader)

See for example:
https://github.com/apache/jena/blob/0a96c6fd1ecac9ffd68d33b536b2d1ce7fd334b6/jena-fuseki2/jena-fuseki-server/pom.xml#L78

     Andy

On 06/12/2021 08:23, Daniel Hernandez wrote:
> 
> Daniel Hernandez <daniel@degu.cl> writes:
> 
>> I followed your sugestion, but I had the same issue.  To make the issue
>> reproducible, I published the code in:
>>
>> https://github.com/danielhz/test-OpAsQuery
>>
>> Daniel
> 
> The code works inside vscode, but not with the jar.  So, I guess that it
> is an issue in the way I am creating the jar file.  I am going to review
> the pom file, because it could be a problem with managing dependencies.
> 
> Daniel
> 
> 
>> Andy Seaborne <andy@seaborne.org> writes:
>>
>>> Works for me in a single file but it looks like missed initialization
>>> or in the wrong order and Java is complicated in the os static class
>>> initialization.
>>>
>>> Could you try with
>>>
>>> public static void main( String[] args ) {
>>>      JenaSystem.init();
>>> ....
>>>      }
>>>
>>> please
>>>
>>>      Andy
>>>
>>> On 05/12/2021 19:39, Daniel Hernandez wrote:
>>>> Hi Andy,
>>>> Andy Seaborne <andy@seaborne.org> writes:
>>>>> Jena tries to - it's quite pragmatic:
>>>>>
>>>>> https://github.com/apache/jena/blob/main/jena-arq/src/main/java/org/apache/jena/sparql/algebra/OpAsQuery.java
>>>>>
>>>>>       Andy
>>>> When I was reviewing the OpAsQuery implementaion in Jena, and I had
>>>> a
>>>> problem: It works with some S-expressions, but fails with others.  My
>>>> testing code includes the following files:
>>>> File 1:
>>>> package cl.degu.sparql;
>>>> import org.apache.jena.query.Query;
>>>> import org.apache.jena.sparql.algebra.OpAsQuery;
>>>> import org.apache.jena.sparql.algebra.Algebra;
>>>> public class SSEtoSPARQL {
>>>>       public static Query translate(String sse) {
>>>>           return OpAsQuery.asQuery(Algebra.parse(sse));
>>>>       }
>>>> }
>>>> FILE 2:
>>>> package cl.degu.sparql;
>>>> public class App
>>>> {
>>>>       public static void main( String[] args )
>>>>       {
>>>>           String sse;
>>>>           // First example
>>>>           sse = "(project ?s (bgp (triple ?s ?p ?c)))";
>>>>           System.out.println(SSEtoSPARQL.translate(sse));
>>>>           // Second example
>>>>           sse = "(project ?s (bgp (triple ?s <http://example.org> ?c)))";
>>>>           System.out.println(SSEtoSPARQL.translate(sse));
>>>>       }
>>>> }
>>>> The first example works, but the second example produces an
>>>> error. The
>>>> output of the main function is the following:
>>>> SELECT  ?s
>>>> WHERE
>>>>     { ?s  ?p  ?c }
>>>> Exception in thread "main" java.lang.ExceptionInInitializerError
>>>>  at org.apache.jena.sparql.sse.lang.ParseHandlerPlain.emitIRI(ParseHandlerPlain.java:165)
>>>>  at org.apache.jena.sparql.sse.lang.ParseHandlerResolver.emitIRI(ParseHandlerResolver.java:150)
>>>>  at org.apache.jena.sparql.sse.lang.ParserSSEBase.emitIRI(ParserSSEBase.java:46)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.IRIref(SSE_ParserCore.java:277)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.RDFTerm(SSE_ParserCore.java:230)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.Term(SSE_ParserCore.java:217)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.TermOrList(SSE_ParserCore.java:62)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.BareList(SSE_ParserCore.java:194)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.List(SSE_ParserCore.java:108)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.TermOrList(SSE_ParserCore.java:80)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.BareList(SSE_ParserCore.java:194)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.List(SSE_ParserCore.java:108)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.TermOrList(SSE_ParserCore.java:80)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.BareList(SSE_ParserCore.java:194)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.List(SSE_ParserCore.java:108)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.TermOrList(SSE_ParserCore.java:80)
>>>>  at org.apache.jena.sparql.sse.lang.parser.SSE_ParserCore.parse(SSE_ParserCore.java:34)
>>>>  at org.apache.jena.sparql.sse.lang.SSE_Parser.parse$(SSE_Parser.java:47)
>>>>  at org.apache.jena.sparql.sse.lang.SSE_Parser.parse(SSE_Parser.java:40)
>>>>  at org.apache.jena.sparql.sse.SSE.parse(SSE.java:452)
>>>>  at org.apache.jena.sparql.sse.SSE.parse(SSE.java:373)
>>>>  at org.apache.jena.sparql.sse.SSE.parse(SSE.java:368)
>>>>  at org.apache.jena.sparql.algebra.Algebra.parse(Algebra.java:107)
>>>>  at cl.degu.sparql.SSEtoSPARQL.translate(SSEtoSPARQL.java:9)
>>>>  at cl.degu.sparql.App.main(App.java:16)
>>>> Caused by: java.lang.NullPointerException
>>>>  at org.apache.jena.query.ARQ.isTrueOrUndef(ARQ.java:654)
>>>>  at org.apache.jena.riot.system.RiotLib.<clinit>(RiotLib.java:59)
>>>>  ... 25 more
>>>> I included Jena into the project with the following dependency:
>>>>       <dependency>
>>>>         <groupId>org.apache.jena</groupId>
>>>>         <artifactId>apache-jena-libs</artifactId>
>>>>         <version>4.2.0</version>
>>>>         <type>pom</type>
>>>>       </dependency>
>>>>
>>>> Daniel
>>>>
>

Received on Monday, 6 December 2021 12:19:18 UTC