[JENA-2187] LangJSONLD11 doesn't extract prefixes from context array or URL reference

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Jena 4.2.0
• Fix Version/s: Jena 4.3.0
• Component/s: ARQ
• Assignee: Andy Seaborne
• Reporter: Paul Tyson
• Created: 27/Oct/21 16:12
• Updated: 09/Dec/21 10:21
• Resolved: 08/Nov/21 14:58

Description

Using riot cmdline, when processing a json-ld @context that is an array, I get the following message, and the prefixes are not emitted in the ttl output.

10:46:02 WARN  LangJSONLD11    :: Unexpected problem while extracting prefixes: Cannot cast org.glassfish.json.JsonArrayBuilderImpl$JsonArrayImpl to jakarta.json.JsonObject
java.lang.ClassCastException: Cannot cast org.glassfish.json.JsonArrayBuilderImpl$JsonArrayImpl to jakarta.json.JsonObject
        at java.lang.Class.cast(Class.java:3605) ~[?:?]
        at jakarta.json.JsonValue.asJsonObject(JsonValue.java:117) ~[jakarta.json-2.0.1.jar:2.0.1]
        at org.apache.jena.riot.lang.LangJSONLD11.extractPrefixes(LangJSONLD11.java:97) [jena-arq-4.2.0.jar:4.2.0]
        at org.apache.jena.riot.lang.LangJSONLD11.read(LangJSONLD11.java:75) [jena-arq-4.2.0.jar:4.2.0]
        at org.apache.jena.riot.lang.LangJSONLD11.read(LangJSONLD11.java:55) [jena-arq-4.2.0.jar:4.2.0]
        at org.apache.jena.riot.RDFParser.read(RDFParser.java:358) [jena-arq-4.2.0.jar:4.2.0]
        at org.apache.jena.riot.RDFParser.parseURI(RDFParser.java:324) [jena-arq-4.2.0.jar:4.2.0]
        at org.apache.jena.riot.RDFParser.parse(RDFParser.java:299) [jena-arq-4.2.0.jar:4.2.0]
        at riotcmd.CmdLangParse.parseRIOT(CmdLangParse.java:297) [jena-cmds-4.2.0.jar:4.2.0]
        at riotcmd.CmdLangParse.parseFile(CmdLangParse.java:251) [jena-cmds-4.2.0.jar:4.2.0]
        at riotcmd.CmdLangParse.exec$(CmdLangParse.java:163) [jena-cmds-4.2.0.jar:4.2.0]
        at riotcmd.CmdLangParse.exec(CmdLangParse.java:128) [jena-cmds-4.2.0.jar:4.2.0]
        at org.apache.jena.cmd.CmdMain.mainMethod(CmdMain.java:92) [jena-cmds-4.2.0.jar:4.2.0]
        at org.apache.jena.cmd.CmdMain.mainRun(CmdMain.java:58) [jena-cmds-4.2.0.jar:4.2.0]
        at org.apache.jena.cmd.CmdMain.mainRun(CmdMain.java:45) [jena-cmds-4.2.0.jar:4.2.0]
        at riotcmd.riot.main(riot.java:29) [jena-cmds-4.2.0.jar:4.2.0]

If the context is a JSON object, no warning message appears, and the prefixes are included in the output.

Issue Links

• is duplicated by: JENA-2190 JSON-LD 1.1 Parsing Error: Cannot cast org.glassfish.json.JsonStringImpl to jakarta.json.JsonObject
• links to: GitHub Pull Request #1094