Hi everyone
I have been used
https://github.com/spinrdf/spinrdf/blob/master/src-examples/org/topbraid/spin/examples/SPINParsingExample.java
to generate SpinRDFModel from SPARQL code and back.
However, when I want to parse back SpinModel with original SPARQL codes
with FILTER NOT EXISTS, it omits NOT Exists's elements. for Example :
CONSTRUCT
{
?a rdf:type ?x .
}
WHERE {
?a rdf:type ?x .
FILTER NOT EXISTS {?a rdf:type ?y .}
}
converts to spinModel correctly, but when I want to get toString() of
spinQuery , it returns :
CONSTRUCT {
?a a ?x .
}
WHERE {
?a a ?x .
FILTER <http://spinrdf.org/sp#notExists>([]) .
}
Similarly, this happens with a normal filter and it returns:
FILTER <http://spinrdf.org/sp#eq>(?a, 3)
Or
FILTER <http://spinrdf.org/sp#gt>(?a, 3)
Instead of
FILTER(?a=3)
Or
FILTER (?a>3)
My code is :
root = getRootOf(spinModel);//root has been found correctly
StmtIterator list = spinModel.listStatements(root,
ResourceFactory.createProperty("
http://www.w3.org/1999/02/22-rdf-syntax-ns#type";), (String) null);
while (list.hasNext()) {
Statement s = list.next();
if (s.getObject().isResource() &&
s.getObject().asResource().equals(SP.CONSTRUCT)) {
Construct spinQuery = s.getSubject().as(Construct.class);
return spinQuery.toString();
}
}
How to change my code to get the correct SPARQL code?
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