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https://issues.apache.org/jira/browse/JENA-632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14321742#comment-14321742
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Bruno P. Kinoshita commented on JENA-632:
-----------------------------------------
Followed the example of execSelect, and used a ResultSet wrapping the
QueryIterator. This way, we were able to reuse existing classes. The resulting
JSON is as follows:
{noformat}
{
"head": {
"vars": [ "author" , "title" ]
} ,
"results": {
"bindings": [
{
"author": { "type": "literal" , "value": "J.K. Rowling" } ,
"title": { "type": "literal" , "value": "Harry Potter and the Order of
the Phoenix" }
} ,
{
"author": { "type": "literal" , "value": "J.K. Rowling" } ,
"title": { "type": "literal" , "value": "Harry Potter and the
Philosopher's Stone" }
} ,
{
"author": { "type": "literal" , "value": "J.K. Rowling" } ,
"title": { "type": "literal" , "value": "Harry Potter and the
Half-Blood Prince" }
} ,
{
"author": { "type": "literal" , "value": "J.K. Rowling" } ,
"title": { "type": "literal" , "value": "Harry Potter and the Deathly
Hallows" }
}
]
}
}
{noformat}
Here are some GitHub links to the mentioned code:
New result set -
https://github.com/kinow/jena/blob/ae7c50f0f313b7dfa1cd8333fb0072f89e5972c5/jena-arq/src/main/java/com/hp/hpl/jena/sparql/engine/ResultSetJsonStream.java#L37
The new method that gets called by SPARQL and builds a ResultSetJsonStream -
https://github.com/kinow/jena/blob/ae7c50f0f313b7dfa1cd8333fb0072f89e5972c5/jena-arq/src/main/java/com/hp/hpl/jena/sparql/engine/QueryExecutionBase.java#L390
I'm waiting until we have settled down on the API details to start writing
tests and documentation.
Thanks!
> 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
> Priority: Minor
> Labels: java, javacc
>
> 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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