static void QueryGraph()
{
using (SessionNoServer session = new SessionNoServer(systemDir))
{
// Start a read only transaction
session.BeginRead();
Graph g = Graph.Open(session);
// Cache SCHEMA
VertexType movieType = g.FindVertexType("Movie");
PropertyType movieTitleType = movieType.FindProperty("title");
VertexType actorType = g.FindVertexType("Actor");
PropertyType actorNameType = actorType.FindProperty("name");
// How many vertices do we have?
Console.WriteLine("Number of Vertices: " + g.CountVertices());
// Find a movie by name
Vertex movie = movieTitleType.GetPropertyVertex("The Matrix");
// Get all actors
var actors = actorType.GetVertices();
// Count the actors
int actorCount = actors.Count();
Console.WriteLine("Number of Actors: " + actorCount);
// Get only the actors whose names end with “s”
foreach (Vertex vertex in actors)
{
string actorName = (string)actorNameType.GetPropertyValue(vertex.VertexId);
if (actorName.EndsWith("s"))
{
Console.WriteLine("Found actor with name ending with \"s\" " + actorName);
}
}
// Get a count of property types
var properties = session.AllObjects <PropertyType>();
Console.WriteLine("Number of Property types: " + properties.Count());
// All vertices and their edges
var edges = g.GetEdges();
int edgeCount = edges.Count();
g.ExportToGraphJson("c:/QuickStart.json");
string exported;
using (MemoryStream ms = new MemoryStream())
{
g.ExportToGraphJson(ms);
exported = Encoding.UTF8.GetString(ms.ToArray());
}
session.Commit();
}
}
public static void CreateUser()
{
using (ServerClientSession session = new ServerClientSession(systemDir, systemHost))
{
session.BeginUpdate();
Graph g = Graph.Open(session);
VertexType movieType = g.FindVertexType("MOVIE");
PropertyType movieTitleType = movieType.FindProperty("TITLE");
PropertyType movieYearType = movieType.FindProperty("YEAR");
for (int i = 1; i < 50; i++)
{
Vertex mVickyCB = movieType.NewVertex();
mVickyCB.SetProperty(movieTitleType, "Vicky Cristina Barcelona" + i);
mVickyCB.SetProperty(movieYearType, (int)(2008 + i));
session.Commit();
session.BeginUpdate();
Thread.Sleep(1000);
}
}
}
static void Main(string[] args)
{
bool import = args.Length > 0 && args[0].ToLower() == "-import";
bool dirExist = Directory.Exists(s_systemDir);
SessionBase.ClearAllCachedObjectsWhenDetectingUpdatedDatabase = false;
if (import || !dirExist)
{
if (dirExist)
{
Directory.Delete(s_systemDir, true); // remove systemDir from prior runs and all its databases.
}
Directory.CreateDirectory(s_systemDir);
using (SessionNoServer session = new SessionNoServer(s_systemDir))
{
DataCache.MaximumMemoryUse = 12000000000; // 12 GB, set this to what fits your case
SessionBase.BTreeAddFastTransientBatchSize = 10; // reduces memory usage
Vertex[] ratingVertices = new Vertex[10];
session.BeginUpdate();
session.DefaultDatabaseLocation().CompressPages = PageInfo.compressionKind.LZ4;
Graph g = new Graph(session);
// SCHEMA
VertexType userType = g.NewVertexType("User");
PropertyType genderType = userType.NewProperty("Gender", DataType.Integer, PropertyKind.Indexed);
VertexType ratingType = g.NewVertexType("Rating");
PropertyType ratingValuePropertyType = ratingType.NewProperty("RatingValue", DataType.Integer, PropertyKind.Indexed);
EdgeType ratingEdgeType = g.NewEdgeType("UserToRating", true, userType, ratingType);
EdgeType ratingOfType = g.NewEdgeType("RatingOf", false, userType, userType);
PropertyType ratingEdgePropertyType = ratingOfType.NewProperty("Rating", DataType.Integer, PropertyKind.Indexed);
// DATA
using (FileStream stream = File.OpenRead(System.IO.Path.Combine(s_inputDataDir, "gender.dat")))
{
using (StreamReader file = new System.IO.StreamReader(stream))
{
string line;
int lineNumber = 0;
while ((line = file.ReadLine()) != null)
{
lineNumber++;
string[] fields = line.Split(',');
Vertex aUser = userType.NewVertex();
aUser.SetProperty(genderType, (int)fields[1][0] == 'M' ? Gender.Male : fields[1][0] == 'F' ? Gender.Female : Gender.Unknown);
}
Console.WriteLine("Done importing " + lineNumber + " users");
}
}
using (FileStream stream = File.OpenRead(System.IO.Path.Combine(s_inputDataDir, "ratings.dat")))
{
using (StreamReader file = new System.IO.StreamReader(stream))
{
string line;
int lineNumber = 0;
Vertex rater = null;
int raterId;
int priorRaterId = -1;
while ((line = file.ReadLine()) != null)
{
lineNumber++;
if (lineNumber % 1000000 == 0)
{
Console.WriteLine("Parsing rating # " + lineNumber);
}
string[] fields = line.Split(',');
raterId = int.Parse(fields[0]);
if (raterId != priorRaterId)
{
rater = userType.GetVertex(raterId);
}
priorRaterId = raterId;
int ratedId = int.Parse(fields[1]);
int rating = int.Parse(fields[2]);
Vertex ratingVertex = ratingVertices[rating - 1];
if (ratingVertex == null)
{
ratingVertex = ratingType.NewVertex();
ratingVertex.SetProperty(ratingValuePropertyType, rating);
ratingVertices[rating - 1] = ratingVertex;
}
Vertex rated = userType.GetVertex(ratedId);
Edge aRatingOf = ratingOfType.NewEdge(rater, rated);
aRatingOf.SetProperty(ratingEdgePropertyType, rating);
Edge userRating = ratingEdgeType.NewEdge(rated, ratingVertex);
}
Console.WriteLine("Done importing " + lineNumber + " ratings");
}
}
session.Commit();
}
}
// Query
using (SessionNoServer session = new SessionNoServer(s_systemDir))
{
session.BeginRead();
Graph g = Graph.Open(session);
VertexType userType = g.FindVertexType("User");
PropertyType genderType = userType.FindProperty("Gender");
VertexType ratingType = g.FindVertexType("Rating");
PropertyType ratingValuePropertyType = ratingType.FindProperty("RatingValue");
EdgeType ratingEdgeType = g.FindEdgeType("UserToRating");
EdgeType ratingOfType = g.FindEdgeType("RatingOf");
PropertyType ratingEdgePropertyType = ratingOfType.FindProperty("Rating");
// Complex queries
int ct = 0;
// Given a user id, and based on the rated profiles, find other users who have rated similarly on the same profiles, and find other profiles to recommend based on what those other users have rated
Vertex someUser = userType.GetVertex(1);
var similarRatings = (from Edge e in someUser.GetEdges(ratingOfType, Direction.Out)
from Edge edge in e.Head.GetEdges(ratingOfType, Direction.Out)
where someUser != edge.Head
where ((int)e.GetProperty(ratingEdgePropertyType) == (int)edge.GetProperty(ratingEdgePropertyType))
select edge.Tail).Distinct();
var someUserRated = from Edge e in someUser.GetEdges(ratingOfType, Direction.Out)
select e.Head;
var recommendedProfles = from v in similarRatings
from Edge e in v.GetEdges(ratingOfType, Direction.Out)
where someUserRated.Contains(e.Head) == false
select e.Head;
Console.WriteLine("Some user's rated profiles");
ct = 0;
foreach (Vertex v in someUserRated)
{
if (ct++ % 50 == 0) // don't print them all !
{
Console.WriteLine("User id: " + v.VertexId);
}
}
Console.WriteLine("Number of some user's rated profiles: " + ct);
Console.WriteLine("Given a user id, and based on the rated profiles, find other users who have rated similarly on the same profiles");
ct = 0;
foreach (Vertex v in similarRatings)
{
if (ct++ % 50 == 0) // don't print them all !
{
Console.WriteLine("User id: " + v.VertexId);
}
}
Console.WriteLine("Number of matching profiles: " + ct);
Console.WriteLine("Given a user id, and based on the rated profiles, find other users who have rated similarly on the same profiles, and find other profiles to recommend based on what those other users have rated");
ct = 0;
foreach (Vertex v in recommendedProfles)
{
if (ct++ % 5000 == 0) // don't print them all !
{
Console.WriteLine("User id: " + v.VertexId);
}
}
Console.WriteLine("Number of matching profiles: " + ct);
// Get all female users with less than 50 ratings
Console.WriteLine();
var females = from u in userType.GetVertices()
where ((Gender)u.GetProperty(genderType)) == Gender.Female
select u;
var femalesLess50Ratings = from f in females
where f.GetNumberOfEdges(ratingEdgeType, Direction.Out) < 50
select f;
Console.WriteLine("Female users with less than 50 ratings");
ct = 0;
foreach (Vertex f in femalesLess50Ratings)
{
long count = f.GetNumberOfEdges(ratingEdgeType, Direction.Out);
if (ct++ % 5000 == 0) // don't print them all !
{
Console.WriteLine("User id: " + f.VertexId + "\tnumber of ratings: " + count);
}
}
Console.WriteLine("Number of females with fewer than 50 ratings: " + ct);
Console.WriteLine();
// Get all male users with at least one 10 rating
Console.WriteLine();
var rated10vertex = (from v in ratingType.GetVertices()
where ((int)v.GetProperty(ratingValuePropertyType)) == 10
select v).First();
var rated10 = (from e in rated10vertex.GetEdges(ratingEdgeType, Direction.In)
select e.GetVertex(Direction.Out)).Distinct();
var rated10male = from Vertex v in rated10
where ((Gender)v.GetProperty(genderType)) == Gender.Male
select v;
Console.WriteLine("Males with at least one 10 rating");
ct = 0;
foreach (Vertex v in rated10male)
{
if (ct++ % 5000 == 0) // don't print them all !
{
Console.WriteLine("User id: " + v.VertexId);
}
}
Console.WriteLine("Number of males with at least one 10 rating: " + ct);
Console.WriteLine();
// Get the first 10 male users who have rated at least 3 of the same profiles as the given user.
Console.WriteLine("10 male users who have rated at least 3 of the same profiles as the given user");
var males = from u in userType.GetVertices()
where ((Gender)u.GetProperty(genderType)) == Gender.Male
select u;
var someUserHasRated = from Edge o in someUser.GetEdges(ratingOfType, Direction.Out)
select o.Head;
var first10withSame3ratedAs = from m in males
where (from Edge r in m.GetEdges(ratingOfType, Direction.Out) select r.Head).Intersect(someUserHasRated).ToArray().Length >= 3
select m;
ct = 0;
foreach (Vertex v in first10withSame3ratedAs)
{
if (++ct > 10)
{
break;
}
Console.WriteLine("User id: " + v.VertexId);
}
Console.WriteLine();
// Statistical queries
// Get the 20 profiles with the most ratings
var top20mostRatings = (from v in userType.GetVertices()
orderby v.GetNumberOfEdges(ratingEdgeType, Direction.Out) descending
select v).Take(20);
Console.WriteLine("20 profiles with the most ratings");
ct = 0;
foreach (Vertex v in top20mostRatings)
{
int count = (int)v.GetNumberOfEdges(ratingEdgeType, Direction.Out);
Console.WriteLine("User id: " + v.VertexId + "\tnumber of ratings: " + count);
}
Console.WriteLine();
var ratingsVertexEnum = from v in ratingType.GetVertices() orderby v.GetProperty(ratingValuePropertyType) descending select v;
Vertex rating10Vertex = ratingsVertexEnum.First();
// Get the 20 best rated profiles regardless of gender
var top = from u in userType.GetVertices()
let edgeCt = u.GetNumberOfEdges(ratingEdgeType, rating10Vertex, Direction.Out)
orderby edgeCt descending
select new { u, edgeCt };
Console.WriteLine("20 best rated profiles regardless of gender");
ct = 0;
foreach (var v in top)
{
if (++ct > 20)
{
break;
}
Console.WriteLine("User id: " + v.u.VertexId + "\t10 ratings: " + v.edgeCt);
}
Console.WriteLine();
// Get the 20 best rated males
Console.WriteLine("20 best rated male profiles");
var top20males = from u in userType.GetVertices()
where ((Gender)u.GetProperty(genderType)) == Gender.Male
let edgeCt = u.GetNumberOfEdges(ratingEdgeType, rating10Vertex, Direction.Out)
orderby edgeCt descending
select new { u, edgeCt };
ct = 0;
foreach (var v in top20males)
{
if (++ct > 20)
{
break;
}
Console.WriteLine("Male User id: " + v.u.VertexId + " \t10 ratings: " + v.edgeCt);
}
Console.WriteLine();
// Get the 20 best rated females
Console.WriteLine("20 best rated female profiles");
var top20females = from u in userType.GetVertices()
where ((Gender)u.GetProperty(genderType)) == Gender.Female
let edgeCt = u.GetNumberOfEdges(ratingEdgeType, rating10Vertex, Direction.Out)
orderby edgeCt descending
select new { u, edgeCt };
ct = 0;
foreach (var v in top20females)
{
if (++ct > 20)
{
break;
}
Console.WriteLine("Female User id: " + v.u.VertexId + "\t10 ratings: " + v.edgeCt);
}
session.Commit();
}
}
public void AddVertices()
{
using (var session = new SessionNoServer(@"d:\graphtest2"))
{
session.DefaultDatabaseLocation().CompressPages = PageInfo.compressionKind.LZ4;
DataCache.MaximumMemoryUse = 4000000000;
var sw = new Stopwatch();
sw.Start();
//int i = 0;
//var dbl = new DatabaseLocation(Dns.GetHostEntry("wordanalysis.cloudapp.net").HostName, @"Z:\DBStore\", 0,
// 3, session);
//DatabaseLocation bl = session.NewLocation(dbl);
//session.Commit(false);
// Assert.That(bl!=null);
// var db = session.OpenDatabase(15, true);
var graph = new Graph(session);
session.BeginUpdate();
session.Persist(graph);
//define schema Trace.Wri
VertexType concept = graph.NewVertexType("Concept");
PropertyType conceptName = concept.NewProperty("ConceptName", DataType.String, PropertyKind.Unique);
PropertyType conceptSize = concept.NewProperty("ConceptSize", DataType.Integer, PropertyKind.NotIndexed);
PropertyType conceptFrequency = concept.NewProperty("ConceptFrequency", DataType.Integer, PropertyKind.NotIndexed);
PropertyType similarity = concept.NewProperty("Similarity", DataType.Double, PropertyKind.NotIndexed);
PropertyType vagueness = concept.NewProperty("Vagueness", DataType.Double, PropertyKind.NotIndexed);
VertexType instance = graph.NewVertexType("Instance", concept);
PropertyType instanceSize = instance.NewProperty("InstanceSize", DataType.Integer,
PropertyKind.NotIndexed);
PropertyType instanceName = instance.NewProperty("InstanceName", DataType.String,
PropertyKind.Unique);
PropertyType instanceFrequency = instance.NewProperty("InstanceFrequency",
DataType.Integer,
PropertyKind.NotIndexed);
//VertexType attributes = graph.NewVertexType("Attribute");
////EdgeType hasAttirbute = attributes.edgattributes.NewHeadToTailEdge(nameScorePair,);
//EdgeType cooccursWith = graph.NewEdgeType("CooccursWith", true, instance, instance);
//PropertyType coocurrenceFrequency = namedScore.NewProperty("IntScore", DataType.Integer,
// PropertyKind.NotIndexed);
//VertexType synonym = graph.NewVertexType("Synonym", namedScore);
//PropertyType synonymScore = synonym.NewProperty("Score", DataType.Integer, PropertyKind.NotIndexed);
//EdgeType hasSynonym = graph.NewEdgeType("HasSynonym", true, synonym, instance);
EdgeType isA = graph.NewEdgeType("IsA", true, concept, instance);
PropertyType frequency = isA.NewProperty("frequency", DataType.Integer, PropertyKind.NotIndexed);
PropertyType popularity = isA.NewProperty("popularity", DataType.Integer, PropertyKind.NotIndexed);
PropertyType ZipfSlope = isA.NewProperty("zipf_slope", DataType.Double, PropertyKind.NotIndexed);
PropertyType ZipfPearson = isA.NewProperty("zipf_pearson", DataType.Double, PropertyKind.NotIndexed);
EdgeType cooccurence = graph.NewEdgeType("Coocurrence", true, concept, concept);
//LRVertex vx1 = graph.NewVertex(instance);
//vx1.SetProperty("Name", "bla");
//LRVertex vx2 = graph.NewVertex(instance);
//vx2.SetProperty("bla", "name");
//LREdge edge = graph.NewEdge(cooccurence, vx1, vx2);
Vertex v2 = graph.NewVertex(concept);
v2.SetProperty(conceptName, "factor");
Vertex v3 = graph.NewVertex(instance);
v3.SetProperty(instanceName, "age");
session.Commit();
}
using (var session = new SessionNoServer(@"d:\graphtest2"))
{
//session.DefaultDatabaseLocation().CompressPages = true;
DataCache.MaximumMemoryUse = 4000000000;
var sw = new Stopwatch();
sw.Start();
//int i = 0;
session.BeginRead();
var graph = Graph.Open(session);
//define schema Trace.Wri
VertexType[] vertexTypes = graph.FindVertexTypes();
//vertexTypes.Select(x => x.TypeName).PrintDump();
EdgeType[] edgeTypes = graph.FindEdgeTypes();
VertexType concept = vertexTypes.FirstOrDefault(x => x.TypeName == "Concept") ?? graph.NewVertexType("Concept");
PropertyType conceptName = concept.FindProperty("ConceptName");
Assert.IsNotNull(conceptName, "ConceptName");
PropertyType conceptSize = concept.FindProperty("ConceptSize");
Assert.IsNotNull(conceptSize, "ConceptSize");
PropertyType conceptFrequency = concept.FindProperty("ConceptFrequency");
//PropertyType similarity = concept.NewProperty("Similarity", VelocityGraph.DataType.Double,
// VelocityGraph.PropertyKind.NotIndexed);
PropertyType vagueness = concept.FindProperty("Vagueness");//, DataType.Double,PropertyKind.NotIndexed);
VertexType instance = vertexTypes.FirstOrDefault(x => x.TypeName == "Instance");
PropertyType instanceSize = instance.FindProperty("InstanceSize");
PropertyType instanceName = instance.FindProperty("InstanceName");
PropertyType instanceFrequency = instance.FindProperty("InstanceFrequency");
//VertexType attributes = graph.NewVertexType("Attribute");
////EdgeType hasAttirbute = attributes.edgattributes.NewHeadToTailEdge(nameScorePair,);
//EdgeType cooccursWith = graph.NewEdgeType("CooccursWith", true, instance, instance);
//PropertyType coocurrenceFrequency = namedScore.NewProperty("IntScore", DataType.Integer,
// PropertyKind.NotIndexed);
//VertexType synonym = graph.NewVertexType("Synonym", namedScore);
//PropertyType synonymScore = synonym.NewProperty("Score", DataType.Integer, PropertyKind.NotIndexed);
//EdgeType hasSynonym = graph.NewEdgeType("HasSynonym", true, synonym, instance);
EdgeType isA = edgeTypes.FirstOrDefault(x => x.TypeName == "IsA");
PropertyType frequency = isA.FindProperty("frequency");
PropertyType popularity = isA.FindProperty("popularity");
PropertyType ZipfSlope = isA.FindProperty("zipf_slope");
PropertyType ZipfPearson = isA.FindProperty("zipf_pearson");
EdgeType cooccurence = graph.FindEdgeType("Coocurrence");
//LRVertex vx1 = graph.NewVertex(instance);
//vx1.SetProperty("Name", "bla");
//LRVertex vx2 = graph.NewVertex(instance);
//vx2.SetProperty("bla", "name");
//LREdge edge = graph.NewEdge(cooccurence, vx1, vx2);
Assert.IsNotNull(conceptName);
Vertex f = graph.FindVertex(conceptName, "factor");
var inst = graph.FindVertex(instanceName, "age");
Assert.IsNotNull(f);
Assert.IsNotNull(inst);
}
//if (instanceVertex == null)
}
// Queries
public void doQueries()
{
using (SessionNoServer session = new SessionNoServer(s_systemDir))
{
session.BeginRead();
Graph g = Graph.Open(session); // it takes a while to open graph fresh from databases
VertexType userType = g.FindVertexType("User");
EdgeType friendEdgeType = g.FindEdgeType("Friend");
PropertyType countryProperty = userType.FindProperty("country");
PropertyType incomeProperty = userType.FindProperty("income");
PropertyType friendshipStartProperty = friendEdgeType.FindProperty("start");
Vertex someUser = userType.GetVertex(1);
Vertex someUser2 = userType.GetVertex(12282);
var someUserFriends = from Edge e in someUser.GetEdges(friendEdgeType, Direction.Out)
select e.Head;
var someUser3LevelNetwork = someUser.Traverse(3, true, Direction.Out);
HashSet <Edge> edges = new HashSet <Edge>();
Edge edge = (Edge)someUser.GetEdges(friendEdgeType, Direction.Out).Skip(1).First();
edges.Add(edge);
HashSet <EdgeType> edgeTypesToTraverse = new HashSet <EdgeType>();
edgeTypesToTraverse.Add(friendEdgeType);
// Find Shortest path between two given user ids
List <List <Edge> > path = someUser.Traverse(4, false, Direction.Out, someUser2, edgeTypesToTraverse);
Debug.Assert(path.Count > 0);
var path2 = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(41), edgeTypesToTraverse);
HashSet <Vertex> vertices = new HashSet <Vertex>();
vertices.Add(someUser2);
var path3 = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(9465810), edgeTypesToTraverse, null, null, vertices); // path must include vertices
var path3b = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(9465810), edgeTypesToTraverse, null, null, null, vertices); // path must NOT include vertices
var path3c = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(9465810), edgeTypesToTraverse, null, null, null, null, edges); // path must include edges
var path3d = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(9465810), edgeTypesToTraverse, null, null, null, null, null, edges); // path must NOT include edges
HashSet <PropertyType> vertexPropertyTypes = new HashSet <PropertyType>();
vertexPropertyTypes.Add(incomeProperty);
vertexPropertyTypes.Add(countryProperty);
var path3e = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(9465810), edgeTypesToTraverse, null, null, null, null, null, edges, vertexPropertyTypes); // path must NOT include edges and at least one vertex in path must have property in propertyTypes
var path3f = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(9465810), edgeTypesToTraverse, null, null, null, null, null, edges, null, vertexPropertyTypes); // path must NOT include edges and no vertex in path must have any property in propertyTypes
HashSet <PropertyType> edgePropertyTypes = new HashSet <PropertyType>();
edgePropertyTypes.Add(friendshipStartProperty);
var path3g = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(9465810), edgeTypesToTraverse, null, null, null, null, null, edges, null, null, edgePropertyTypes);
var path3h = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(9465810), edgeTypesToTraverse, null, null, null, null, null, edges, null, null, null, edgePropertyTypes);
var path3i = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(9465810), edgeTypesToTraverse, null, null, null, null, null, edges, null, null, null, null, p => { object pv = p.GetProperty(countryProperty); return(pv != null && pv.Equals("Sweden")); });
var path3j = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(9465810), edgeTypesToTraverse, null, null, null, null, null, edges, null, null, null, null, null, p => { DateTime?pv = (DateTime?)p.GetProperty(friendshipStartProperty); return(pv != null && pv.Value.CompareTo(DateTime.Now) > 0); });
var path4 = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(2798), edgeTypesToTraverse);
var path5 = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(175), edgeTypesToTraverse);
var path6 = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(1531), edgeTypesToTraverse);
var path7 = someUser.Traverse(4, false, Direction.Out, userType.GetVertex(1537), edgeTypesToTraverse);
Console.WriteLine();
// Get all the paths between two user ids
var path8 = someUser.Traverse(4, true, Direction.Out, someUser2, edgeTypesToTraverse);
path = someUser.Traverse(4, true, Direction.Out, userType.GetVertex(41), edgeTypesToTraverse);
// Get the number of unique 2nd level friends a given user has (friends of my friends)
var someUsers2ndLevelFriends = (from v in someUserFriends
from Edge e in v.GetEdges(friendEdgeType, Direction.Out)
select e.Head).Distinct();
Console.WriteLine("unique 2nd level friends a given user has");
int ct = 0;
foreach (Vertex v in someUsers2ndLevelFriends)
{
if (++ct % 100 == 0)
{
Console.WriteLine("User id: " + v.VertexId);
}
}
Console.WriteLine("Some user has: " + ct + " 2nd level friends");
Console.WriteLine();
// Get the top 10 users with most friends
var top10mostFriends = from vertex in userType.GetTopNumberOfEdges(friendEdgeType, 10, Direction.Out)
select vertex;
Console.WriteLine("top 10 users with most friends");
foreach (Vertex v in top10mostFriends)
{
long count = v.GetNumberOfEdges(friendEdgeType, Direction.Out);
Console.WriteLine("User id: " + v.VertexId + "\t number of friends: " + count);
}
Console.WriteLine();
session.Commit();
}
}
/// <summary>
/// Return the object value associated with the provided string key.
/// If no value exists for that key, return null.
/// </summary>
/// <param name="key">the key of the key/value property</param>
/// <returns>the object value related to the string key</returns>
public override object GetProperty(string key)
{
PropertyType pt = m_vertexType.FindProperty(key);
return(m_vertexType.GetPropertyValue(m_id, pt));
}
/// <summary>
/// Finds a <see cref="PropertyType"/> of <see cref="VertexType"/>.
/// </summary>
/// <param name="vertexType">vertex type with property type</param>
/// <param name="name">a name of a property</param>
/// <returns></returns>
public PropertyType FindVertexProperty(VertexType vertexType, string name)
{
return(vertexType.FindProperty(name));
}
