Hi:
I'm trying to process the results of performing a CONSTRUCT query on
Virtuoso using apache-jena-2.7.0-incubating
[1] shows the JSON String I would like to read (schemaStr).
Here is an extract of my code:
SysRIOT.wireIntoJena();
Model modelSchema = ModelFactory.createDefaultModel();
RDFReader schemaReader = new JenaReaderRdfJson() ;
StringReader s = new StringReader(schemaStr);
schemaReader.read(modelSchema, s, "");
And I receive the following exception caused in the line that executes the read:
com.hp.hpl.jena.shared.JenaException: org.openjena.riot.RiotException:
[line: 2, col: 3 ] Relative IRI: head
at
org.openjena.riot.system.JenaReaderRIOT.readImpl(JenaReaderRIOT.java:150)
at org.openjena.riot.system.JenaReaderRIOT.read(JenaReaderRIOT.java:54)
....................
It seems to have trouble reading the "head" section.
My questions:
Is Virtuoso JSON output compatible with what JenaReaderRdfJson expects to read?
Am I missing something else?
I'm using the empty string ("") as base URI in the read method, but I
don't understand what is the read method expecting in this field.
Thanks in advance
Lorena
[1]
{ "head": { "link": [], "vars": [ "s", "p", "o" ] },
"results": { "distinct": false, "ordered": true, "bindings": [
{ "s": { "type" : "uri", "value" : "_:vb43419" } , "p": { "type" :
"uri", "value" : "http://purl.org/olap#hasAggregateFunction"; } , "o":
{ "type" : "uri", "value" : "http://purl.org/olap#sum"; }},
{ "s": { "type" : "uri", "value" : "_:vb43418" } , "p": { "type" :
"uri", "value" : "http://purl.org/olap#level"; } , "o": { "type" :
"uri", "value" : "http://example.org/householdCS#year"; }},
{ "s": { "type" : "uri", "value" :
"http://example.org/householdCS#household_withoutGeo"; } , "p": {
"type" : "uri", "value" : "http://purl.org/linked-data/cube#component";
} , "o": { "type" : "uri", "value" : "_:vb43418" }},
{ "s": { "type" : "uri", "value" :
"http://example.org/householdCS#household_withoutGeo"; } , "p": {
"type" : "uri", "value" : "http://purl.org/linked-data/cube#component";
} , "o": { "type" : "uri", "value" : "_:vb43419" }},
{ "s": { "type" : "uri", "value" : "_:vb43419" } , "p": { "type" :
"uri", "value" : "http://purl.org/linked-data/cube#measure"; } , "o": {
"type" : "uri", "value" : "http://example.org/householdCS#household";
}},
{ "s": { "type" : "uri", "value" :
"http://example.org/householdCS#householdCS"; } , "p": { "type" :
"uri", "value" : "http://www.w3.org/1999/02/22-rdf-syntax-ns#type"; } ,
"o": { "type" : "uri", "value" :
"http://purl.org/linked-data/cube#DataStructureDefinition"; }} ] } }
