[
https://issues.apache.org/jira/browse/JENA-632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16404685#comment-16404685
]
ASF GitHub Bot commented on JENA-632:
-------------------------------------
Github user afs commented on a diff in the pull request:
https://github.com/apache/jena/pull/114#discussion_r175409690
--- Diff:
jena-arq/src/main/java/org/apache/jena/query/ResultSetFormatter.java ---
@@ -516,6 +520,41 @@ static public void outputAsJSON(boolean booleanResult)
static public void outputAsJSON(OutputStream outStream, boolean
booleanResult)
{ output(outStream, booleanResult, SPARQLResultSetJSON) ; }
+ /** Output an iterator of JSON values.
+ *
+ * @param outStream output stream
+ * @param jsonItems The JSON values
+ */
+ public static void outputAsJSON(OutputStream outStream,
Iterator<JsonObject> jsonItems)
+ {
+ JSWriter jWriter = new JSWriter(outStream) ;
+ jWriter.startArray() ;
+ jWriter.startOutput() ;
+ while (jsonItems.hasNext())
+ {
+ jWriter.startObject() ;
+ JsonObject jsonItem = jsonItems.next() ;
+ for (Entry<String, JsonValue> entry: jsonItem.entrySet())
+ {
+ JsonValue value = entry.getValue() ;
+ String val = "";
+ if (value.isString()) {
--- End diff --
"outputAsJSON" is a bit confusing because the other functions of the same
name produce SPARQL results in JSON. How about "output"?
In the code, numbers still come out as strings.
JSWriter seems to be only good for its current usage. The code below seems
to work: it manages the outer array itself and uses `JsonValue.output` to write
each item.
```
public static void outputAsJSON(OutputStream outStream,
Iterator<JsonObject> jsonItems)
{
IndentedWriter out = new IndentedWriter(outStream);
out.println("[");
out.incIndent();
while (jsonItems.hasNext()) {
JsonObject jsonItem = jsonItems.next() ;
jsonItem.output(out);
if ( jsonItems.hasNext() )
out.println(" ,");
else
out.println();
}
out.decIndent();
out.println("]");
out.flush();
}
```
> Generate JSON from SPARQL directly.
> -----------------------------------
>
> Key: JENA-632
> URL: https://issues.apache.org/jira/browse/JENA-632
> Project: Apache Jena
> Issue Type: Improvement
> Components: ARQ, Fuseki
> Reporter: Andy Seaborne
> Assignee: Bruno P. Kinoshita
> Priority: Minor
> Labels: java, javacc
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> The capability to generate JSON directly from a SPARQL (or extended SPARQL)
> query would enable the creation of JSON data API over published linked data.
> This project would cover:
> # Design and publication of a design.
> # Refinement of design based on community feed
> # Implementation, including testing.
> # Refinement of implementation based on community feed
> Skills required: Java, some parser work, design and discussion with the user
> community, basic understanding of HTTP and content negotiation.
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