function execQuery(q, g) {
map = [];
return client.query(q).then(function(res, err) {
if (err) {
console.log('recommendation_engine: could not retrieve classes or properties: ' + err);
return;
}
var uris = res.map(function(result) {
return result.cp.value;
});
map[g] = uris;
return {"graph": g, "list": uris};
});
}
app.get('/sparql-proxy/:endpoint/:query', function(req, res) {
var query = req.param("query");
var endpoint = req.param("endpoint");
var client = new GraphStoreClient(endpoint, null);
client.query(query).then(function(result, err) {
if (err) {
console.log('visualization_backend: Could not execute query: ' + err);
return;
}
console.log("SPARQL_RESULT");
console.dir(result);
res.send(result);
});
});
function query(ontology_graph, ontology_endpoint) {
console.log("QUERY VISUALIZATION PATTERNS");
var client = new GraphStoreClient(ontology_endpoint, null);
var query = "";
query += 'PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> \n';
query += 'PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> \n';
query += 'PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> \n';
query += 'PREFIX vis: <http://linda-project.eu/linda-visualization#> \n';
query += 'PREFIX visconf: <http://linda-project.eu/visualization-configuration#> \n';
query += "SELECT ";
query += "?visualizationName ?optionName ?minCardinality ?maxCardinality ?scaleOfMeasurement ?dimensionRole ?associatedProperty \n ";
query += "WHERE \n";
query += "{ \n";
query += "GRAPH <" + ontology_graph + "> \n";
query += "{ \n";
query += "?visualization a vis:Visualization .\n ";
query += "?visualization vis:visualizationName ?visualizationName .\n ";
query += "?visualization vis:structureOption ?structureOption .\n ";
query += "?structureOption vis:optionName ?optionName .\n ";
query += "?structureOption vis:optionType ?optionType .\n ";
query += "OPTIONAL { ?optionType vis:minCardinality ?minCardinality .}\n ";
query += "OPTIONAL { ?optionType vis:maxCardinality ?maxCardinality .}\n ";
query += "?optionType vis:scaleOfMeasurement ?scale .\n ";
query += "?scale rdfs:label ?scaleOfMeasurement .\n ";
query += "OPTIONAL {\n";
query += " ?optionType vis:dimensionRole ?dimensionRole . \n"
query += "} \n ";
query += "OPTIONAL { ?optionType vis:associatedProperty ?associatedProperty . } \n ";
query += "} \n";
query += "} \n";
// console.log("QUERY VISUALIZATIONS PATTERNS");
// console.log(query);
var patterns = {};
return client.query(query).then(function (results, err) {
// console.log("SPARQL RESULT VISUALIZATION PATTERNS");
// console.dir(results);
for (var i = 0; i < results.length; i++) {
var option = results[i];
var visualizationName_ = option['visualizationName']['value'];
var optionName_ = option['optionName']['value'];
if (patterns[visualizationName_]) {
if (patterns[visualizationName_][optionName_]) {
patterns[visualizationName_][optionName_]['scalesOfMeasurement'].push(option['scaleOfMeasurement']['value']);
} else {
patterns[visualizationName_][optionName_] = {
optionName: option['optionName']['value'],
scalesOfMeasurement: [option['scaleOfMeasurement']['value']],
dimensionRole: (option['dimensionRole'] || {})['value'],
associatedProperty: (option['associatedProperty'] || {})['value'],
minCardinality: parseInt(option['minCardinality'] || {})['value'],
maxCardinality: parseInt(option['maxCardinality'] || {})['value']
};
}
} else {
patterns[visualizationName_] = {};
patterns[visualizationName_][optionName_] = {
optionName: option['optionName']['value'],
scalesOfMeasurement: [option['scaleOfMeasurement']['value']],
dimensionRole: (option['dimensionRole'] || {})['value'],
associatedProperty: (option['associatedProperty'] || {})['value'],
minCardinality: parseInt(option['minCardinality'] || {})['value'],
maxCardinality: parseInt(option['maxCardinality'] || {})['value']
};
}
}
// console.log("VISUALIZATION PATTERNS ");
// console.dir(JSON.stringify(patterns));
return patterns;
});
}