[JENA-594] rdfcat silently ignores - as stdin if input type isn't specified

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Won't Fix
• Affects Version/s: Jena 2.11.0
• Fix Version/s: Jena 2.13.0
• Component/s: Cmd line tools
• Labels: rdfcat riot
• Assignee: Andy Seaborne
• Reporter: Joshua Taylor
• Created: 18/Nov/13 16:47
• Updated: 13/Apr/18 14:26
• Resolved: 13/Apr/18 14:26

Description

Treatment of content from standard in by - and /dev/stdin differs when format is not specified.

Using -, non RDF/XML content is silently ignored. Specifying -n gets it treated correctly.

$ echo '<s> <p> <o>' | rdfcat -
<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
</rdf:RDF>

$ echo '<s> <p> <o>' | rdfcat -n -
<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:j.0="file:///home/taylorj/tmp/">
  <rdf:Description rdf:about="file:///home/taylorj/tmp/s">
    <j.0:p rdf:resource="file:///home/taylorj/tmp/o"/>
  </rdf:Description>
</rdf:RDF>

-n with /dev/stdin works, too. Using /dev/stdin with no format option blows up, though. (It's not silently ignored like - was)

$ echo '<s> <p> <o>' | rdfcat -n /dev/stdin 
<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:j.0="file:///dev/">
  <rdf:Description rdf:about="file:///dev/s">
    <j.0:p rdf:resource="file:///dev/o"/>
  </rdf:Description>
</rdf:RDF>

$ echo '<s> <p> <o>' | rdfcat /dev/stdin 
11:46:21 WARN  riot                 :: {W104} Unqualified typed nodes are not allowed. Type treated as a relative URI.
11:46:21 WARN  riot                 :: {W136} Relative URIs are not permitted in RDF: specifically <s>
11:46:21 WARN  riot                 :: {W104} Unqualified property elements are not allowed. Treated as a relative URI.
11:46:21 WARN  riot                 :: {W136} Relative URIs are not permitted in RDF: specifically <p>
11:46:21 WARN  riot                 :: {W104} Unqualified typed nodes are not allowed. Type treated as a relative URI.
11:46:21 WARN  riot                 :: {W136} Relative URIs are not permitted in RDF: specifically <o>
11:46:21 ERROR riot                 :: XML document structures must start and end within the same entity.
Exception in thread "main" org.apache.jena.riot.RiotException: XML document structures must start and end within the same entity.
        at org.apache.jena.riot.system.ErrorHandlerFactory$ErrorHandlerStd.fatal(ErrorHandlerFactory.java:136)
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