public void HasCrossGraphBlank()
{
var rdf = new RdfData(new NodeFactory());
var g1 = rdf.GetGraph(rdf.BlankSelf());
var g2 = rdf.GetFullGraph("app:test");
var who = rdf.Uri("app:who");
var b1 = g1.Blank("b1");
//b1 in g1 points to blank in g2 for details.
g1.Assert(b1, who, g2.Id);
//b1 has name fred.
var name = rdf.Uri("app:name");
g2.Assert(b1, name, rdf.New("Fred"));
//Now find via cross graph query.
var otherG = g1.Query.Single(x =>
x.Predicate == who &&
x.Object is Node <UriOrBlank>)
.Object.Cast <UriOrBlank>();
var myName = rdf.GetGraph(otherG).Query.Where(x =>
x.Subject == b1 &&
x.Predicate == name)
.Get <string>()
.Single();
Assert.AreEqual("Fred", myName);
}
public void AddListAndKeepingReferenceToStart()
{
var rdf = new RdfData(new NodeFactory());
var g = rdf.GetGraph(rdf.Uri("graph:/g1"))
.Update
.Let(out var graphId);
//(http://www.snee.com/bobdc.blog/2014/04/rdf-lists-and-sparql.html)
// x:sub rdfs:first "one"
// x.sub rdfs:rest _:1
// _:1 rdfs:first "two"
// _:1 rdfs:rest _:2
// _:2 rdfs:first "three"
// _:2 rdfs:rest rsf:nil
g.For(rdf.Uri("x:sub"))
.Let(out var listStart)
.List(rdf.New("one"), rdf.New("two"), rdf.New("three"))
.With(rdf.Uri("x:p")).Add(rdf.New("Extra data on last item"))
//And jump back to starting subject.
.ThenFor(listStart);
var listModel = new RdfsList(rdf, rdf.GetGraph(graphId));
var items = listModel.GetList(listStart)
.ToList();
Assert.AreEqual(3, items.Count, "Got 3 items from list");
Assert.AreEqual("two", items[1].Value <string>(), "2nd is as expected");
}
public void QueryIncludesOtherGraphs()
{
var rdf = new RdfData(new NodeFactory());
var g1 = rdf.GetGraph(rdf.BlankSelf());
g1.Assert(rdf.Uri("app:test"), rdf.Uri("app:name"),
rdf.New("baseName"));
var g2 = rdf.GetGraph(rdf.BlankSelf());
g2.Assert(rdf.Uri("app:test"), rdf.Uri("app:name"),
rdf.New("mainName"));
var target = rdf.GetGraph(g2.Id, g1.Id);
var names = target.Query.With(rdf, "app:name").ToArray();
Assert.AreEqual(2, names.Length, "Finds both entries");
//Get the name value.
var name = names
.Get <string>()
.FirstOrNull();
Assert.AreEqual("mainName", name, "Main graph is first in the query");
}
public void RdfUpdate_AvailableInGraph()
{
var f = new NodeFactory();
var rdf = new RdfData(f);
var g1 = f.BlankSelf();
var g2 = f.BlankSelf();
var graphPreUpdates = rdf.GetGraph(g1, g2);
//add directly via rdf data.
var sub = rdf.Uri("x:/s1");
var pred = rdf.Uri("x:/p1");
var val = rdf.New("text");
rdf.Assert(g1, sub, pred, val);
rdf.Assert(g2, sub, pred, val);
//immediately have the owned quad,
//but not the data from other graph.
Assert.AreEqual(1, graphPreUpdates.Query.Count, "Got the new entry");
var graphReInit = rdf.GetGraph(g1, g2);
Assert.AreEqual(2, graphReInit.Query.Count, "Re-access graph gets latest");
}
public void QueryData()
{
var rdf = new RdfData(new NodeFactory());
//load data.
if (!_dataFile.Exists())
{
throw new Exception("Data file needs to be pre-built");
}
var graph = rdf.GetGraph(rdf.BlankSelf("g1"));
new NTripleFile(_dataFile).Read(graph).Wait();
//predicates.
var root = rdf.Uri("app:root");
var rootFolder = graph.Query
.With(root)
.GetUri()
.Single();
var expected = Uri.EscapeUriString(_rootFolder.AsUri().ToString());
Assert.AreEqual(expected, rootFolder);
}
public void WriteTripleData()
{
var rdf = new RdfData(new NodeFactory());
var target = new NTripleFile(Files.AppDataDir.GetFile(
nameof(NTripleFileTests), nameof(WriteTripleData) + ".nt"));
var g = rdf.BlankSelf("g1");
rdf.Assert(g,
rdf.Uri("x:sub1"),
rdf.Uri("x:age"),
rdf.New(23));
target.Write(rdf.GetGraph(g)).Wait();
}
public void ClearGraph()
{
var data = new RdfData(new NodeFactory());
data.Update.From("sys:/data/", out _)
.For("sub:s1", out _)
.With("x:/p1", out _).Add(123);
var g = data.GetGraph(data.BlankSelf())
.Assert(data.Uri("x:/s1"),
data.Uri("p:/1"),
data.New("text"));
Assert.AreEqual(2, data.Query.Count, "have the nodes");
g.Clear();
Assert.AreEqual(0, g.Query.Count, "no graph nodes");
Assert.AreEqual(1, data.Query.Count, "still have other data");
}
public void AddWithUpDownAndLet()
{
var f = new NodeFactory();
var rdf = new RdfData(f);
var gId = f.BlankSelf("g1");
var g = rdf.GetGraph(gId).Update;
// _:1 x:p1 "1".
g.ForBlank("1", out _)
.With(f.Uri("x:p1"))
.Add(f.New("1"))
// _:1 x:p2 "123"
.Then().With(f.Uri("x:p2")).Add(f.New("123"))
// _:1 x:p3 _:2
// _:2 x:p3 "fred"
.Then().With(f.Uri("x:p3")).To(f.Blank(gId))
.With(f.Uri("x:p3")).Add(f.New("fred"))
//get ref to _:2
.Then().Let(out _);
}