private IEnumerable <SparqlQuery> GetRemoteQueries(SparqlEvaluationContext context, ISet[] bindings)
{
if (bindings.Length == 0)
{
// No pre-bound variables/BINDINGS clause so just return the query
yield return(GetRemoteQuery(context));
}
else
{
// Split bindings in chunks and inject them
foreach (var chunk in bindings.ChunkBy(100))
{
var vars = chunk.SelectMany(x => x.Variables).Distinct();
var data = new BindingsPattern(vars);
foreach (var set in chunk)
{
var tuple = new BindingTuple(
new List <string>(set.Variables),
new List <PatternItem>(set.Values.Select(x => new NodeMatchPattern(x))));
data.AddTuple(tuple);
}
var sparqlQuery = GetRemoteQuery(context);
sparqlQuery.RootGraphPattern.AddInlineData(data);
yield return(sparqlQuery);
}
}
}
/// <summary>
/// Creates a new Set from a Binding Tuple
/// </summary>
/// <param name="tuple">Tuple</param>
internal Set(BindingTuple tuple)
{
this._values = new Dictionary <string, INode>();
foreach (KeyValuePair <String, PatternItem> binding in tuple.Values)
{
this.Add(binding.Key, tuple[binding.Key]);
}
}
