Enum ReaderQueryResultsParserOutput

pub enum ReaderQueryResultsParserOutput<R>
where
    R: Read,
{
    Solutions(ReaderSolutionsParser<R>),
    Boolean(bool),
}

The reader for a given read of a results file.

It is either a read boolean (bool) or a streaming reader of a set of solutions (ReaderSolutionsParser).

Example in TSV (the API is the same for JSON and XML):

use oxrdf::{Literal, Variable};
use sparesults::{QueryResultsFormat, QueryResultsParser, ReaderQueryResultsParserOutput};

let tsv_parser = QueryResultsParser::from_format(QueryResultsFormat::Tsv);

// boolean
if let ReaderQueryResultsParserOutput::Boolean(v) =
    tsv_parser.clone().for_reader(b"true".as_slice())?
{
    assert_eq!(v, true);
}

// solutions
if let ReaderQueryResultsParserOutput::Solutions(solutions) =
    tsv_parser.for_reader(b"?foo\t?bar\n\"test\"\t".as_slice())?
{
    assert_eq!(
        solutions.variables(),
        &[Variable::new("foo")?, Variable::new("bar")?]
    );
    for solution in solutions {
        assert_eq!(
            solution?.iter().collect::<Vec<_>>(),
            vec![(&Variable::new("foo")?, &Literal::from("test").into())]
        );
    }
}

Variants

Solutions(ReaderSolutionsParser<R>)

Boolean(bool)

Trait Implementations

impl<R> From<ReaderQueryResultsParserOutput<R>> for QueryResults

where R: Read + 'static,

fn from(reader: ReaderQueryResultsParserOutput<R>) -> QueryResults

Converts to this type from the input type.