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https://issues.apache.org/jira/browse/JENA-643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13902758#comment-13902758
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Andy Seaborne commented on JENA-643:
------------------------------------

Base URI resolution should be done in {{TurtleWriterBase}}/{{TriGWriterBase}} 
(or in {{RDFWriterRIOT}} but that is not future proof).

Nearby:

{{NodeFormatterTTL.formatURI(AWriter w, String uriStr)}} calls static 
{{abbrevByBase}} with the base URI but that creates a factory each time.  One 
factory per NodeFormatterTTL instance.

> rdfcopy causes an exception from new TTL writer.
> ------------------------------------------------
>
>                 Key: JENA-643
>                 URL: https://issues.apache.org/jira/browse/JENA-643
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: RIOT
>    Affects Versions: Jena 2.11.1
>            Reporter: Andy Seaborne
>            Priority: Minor
>             Fix For: Jena 2.11.2
>
>
> Taken from:
> http://mail-archives.apache.org/mod_mbox/jena-users/201402.mbox/%3CCAE94aYUeKhE2vQZVvVdyFzJ7h%2BetbEzq3GNYi0Js-hrathB4EA%40mail.gmail.com%3E
> It depends on whether RIOT is used or not.  
> rdfcopy does:
> {noformat}
> model.getWriter(...).write(...,base)
> {noformat}
> and base is not resolved causing (debugged).
> {noformat}
> Unhandled exception:
>     org.apache.jena.iri.impl.IRIImplException: <D.nt> Code: 
> 57/REQUIRED_COMPONENT_MISSING in SCHEME: A component that is required by the 
> scheme is missing.
> org.apache.jena.iri.impl.IRIImplException: <D.nt> Code: 
> 57/REQUIRED_COMPONENT_MISSING in SCHEME: A component that is required by the 
> scheme is missing.
>       at 
> org.apache.jena.iri.impl.AbsIRIFactoryImpl.throwAnyErrors(AbsIRIFactoryImpl.java:65)
>       at 
> org.apache.jena.iri.impl.AbsIRIFactoryImpl.construct(AbsIRIFactoryImpl.java:48)
>       at 
> org.apache.jena.riot.out.NodeFormatterTTL.abbrevByBase(NodeFormatterTTL.java:99)
>       at 
> org.apache.jena.riot.out.NodeFormatterTTL.formatURI(NodeFormatterTTL.java:80)
>       at 
> org.apache.jena.riot.out.NodeFormatterBase.formatURI(NodeFormatterBase.java:49)
>       at 
> org.apache.jena.riot.out.NodeFormatterBase.format(NodeFormatterBase.java:37)
>       at 
> org.apache.jena.riot.writer.TurtleShell.writeNode(TurtleShell.java:659)
>       at 
> org.apache.jena.riot.writer.TurtleShell$ShellGraph.writeCluster(TurtleShell.java:375)
>       at 
> org.apache.jena.riot.writer.TurtleShell$ShellGraph.writeBySubject(TurtleShell.java:364)
>       at 
> org.apache.jena.riot.writer.TurtleShell$ShellGraph.writeGraph(TurtleShell.java:257)
>       at 
> org.apache.jena.riot.writer.TurtleShell$ShellGraph.access$1(TurtleShell.java:254)
>       at 
> org.apache.jena.riot.writer.TurtleShell.writeGraphTTL(TurtleShell.java:74)
>       at 
> org.apache.jena.riot.writer.TurtleWriter$TurtleWriter$.write(TurtleWriter.java:47)
>       at 
> org.apache.jena.riot.writer.TurtleWriter$TurtleWriter$.access$0(TurtleWriter.java:41)
>       at 
> org.apache.jena.riot.writer.TurtleWriter.output$(TurtleWriter.java:32)
>       at 
> org.apache.jena.riot.writer.TurtleWriterBase.write(TurtleWriterBase.java:52)
>       at 
> org.apache.jena.riot.adapters.RDFWriterRIOT.write(RDFWriterRIOT.java:101)
>       at jena.rdfcopy.main(rdfcopy.java:123)
> {noformat}



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