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Kelvin 2022-06-15T13:56:54.499729Z
So I was playing around with Apache Jena's https://jena.apache.org/documentation/javadoc/arq/org/apache/jena/query/ResultSetFormatter.html class (in order to work with the SPARQL Protocol). Each method accepts either a https://jena.apache.org/documentation/javadoc/arq/org/apache/jena/query/ResultSet.html or a boolean, and since the latter was easier to work with I was using that. And here are the results:
(defmacro ->format-str
"Macro to work with ResultSetFormatter to return strings."
[f this]
`(with-open [~'baos (java.io.ByteArrayOutputStream.)]
(~f ~'baos ~this)
(String. (.toByteArray ~'baos))))
(->format-str ResultSetFormatter/outputAsJSON true)
; Result: "{ \n \"head\" : { } ,\n \"boolean\" : true\n}\n"
(->format-str ResultSetFormatter/outputAsXML true)
; Result: "<?xml version=\"1.0\"?>\n<sparql xmlns=\"\">\n <head>\n </head>\n <boolean>true</boolean>\n</sparql>\n"
(->format-str ResultSetFormatter/outputAsCSV true)
; Result: "" Kelvin 2022-06-15T13:58:31.263659Z
As you can see, for JSON and XML the formatted results make sense, but for CSV the result becomes an empty string. This seems "wrong," and I haven't been able to find much documentation on what the result for ASK queries (which return booleans) should be