Andy,
This is my method to display query results to a user that can select display
format:
public void print(String format, OutputStream out, ResultSet results){
if(format==null || "".equals(format)){
ResultSetFormatter.out(out, results);
}else if(ARG_OUTPUT_FORMAT_JSON.equalsIgnoreCase(format)){
ResultSetFormatter.output(out, results, ResultSetFormat.syntaxJSON);
}else if(ARG_OUTPUT_FORMAT_XML.equalsIgnoreCase(format)){
ResultSetFormatter.output(out, results, ResultSetFormat.syntaxXML);
}else if(ARG_OUTPUT_FORMAT_CSV.equalsIgnoreCase(format)){
ResultSetFormatter.output(out, results, ResultSetFormat.syntaxCSV);
}else if(ARG_OUTPUT_FORMAT_RDF.equalsIgnoreCase(format)){
ResultSetFormatter.output(out, results,
ResultSetFormat.syntaxRDF_XML);
}else if(ARG_OUTPUT_FORMAT_N3.equalsIgnoreCase(format)){
ResultSetFormatter.output(out, results,
ResultSetFormat.syntaxRDF_N3);
//results.getResourceModel().write(out, "N-TRIPLE");
}else if(ARG_OUTPUT_FORMAT_TURTLE.equalsIgnoreCase(format)){
ResultSetFormatter.output(out, results,
ResultSetFormat.syntaxRDF_TURTLE);
//results.getResourceModel().write(out, "TURTLE");
}else{
ResultSetFormatter.output(out, results, ResultSetFormat.syntaxText);
}
}
It's quite simple, nothing fancy.
Milorad
----- Original Message -----
> From: Andy Seaborne <[email protected]>
> To: [email protected]
> Cc:
> Sent: Wednesday, February 15, 2012 2:03 PM
> Subject: Re: namespaces in sparql results
>
> On 15/02/12 11:57, Milorad Tosic wrote:
>> Andy,
>>
>> Yes, results are ResultSet. What you described about
>> ResultSetFormatter.output is exactly what I noticed, but couldn't
>> find it in any documentation, so I concluded that I did something
>> wrong. Thanks for the explanation.
>>
>> Prefixes only matter the presentation style and are not related to
>> resource identity IRI/URI etc. However, it would be more convenient
>> for a human user to watch query results presented without full URI
>> names. In fact, my personal choice would be turtle format with
>> prefixes instead of full URI names.
>>
>>
>> Are you suggesting that if I set prefixes explicitly in the Model
>> containing results before I try to do
>> results.getResourceModel().write(out, "TURTLE") it would print
> turtle
>> format with prefixes instead of full URL names?
>>
>> Thanks, Milorad
>
> Hi Milorad,
>
> Results.getResourceModel() does not contain the results of the query.
> In some cases it's undefined, sometimes its empty, sometimes it is the
> data queried.
>
> If you want the results as RDF (non-standard format) you need to call
> outputAsRDF. That's a model and you can set it's prefixes.
>
> If you want to process a result set, then try out the text format
> output, you'll find it does try to use prefixes where available. It
> uses FmtUtils.stringForRDFNode to format the result set items.
>
> A complete, minimal example of what you're trying to do would be helpful.
>
> Andy
>
