示例#1
0
        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);
        }
示例#2
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        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");
        }
示例#3
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        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");
        }
示例#4
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        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");
        }
示例#5
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        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);
        }
示例#6
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        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();
        }
示例#7
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        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");
        }
示例#8
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        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 _);
        }