/// <summary>
/// Try to find all <see cref="Vertex"/> with a given property value.
/// </summary>
/// <param name="value">The property value to look for</param>
/// <param name="polymorphic">If true, also look for property value matching vertices of property <see cref="VertexType"/> sub classes</param>
/// <returns>Enumeration of matching vertices</returns>
public IEnumerable <Vertex> GetPropertyVertices(T value, bool polymorphic = false)
{
VertexId elementId = -1;
VertexType vertexType = MyGraph.VertexTypes[TypeId];
if (m_valueIndexUnique == null || m_valueIndexUnique.TryGetValue(value, out elementId) == false)
{
BTreeSet <ElementId> elementIds;
if (m_valueIndex != null && m_valueIndex.TryGetValue(value, out elementIds))
{
foreach (ElementId eId in elementIds)
{
Vertex vertex = vertexType.GetVertex(eId, polymorphic, false);
if (vertex != null)
{
yield return(vertex);
}
}
}
}
if (elementId != -1)
{
Vertex vertex = vertexType.GetVertex(elementId, polymorphic, false);
if (vertex != null)
{
yield return(vertex);
}
}
}
/// <summary>
/// Gets an edge given an edge id. Throws if no such edge exist.
/// </summary>
/// <param name="edgeId">The id of the edge</param>
/// <returns>The edge with matching id if it exists</returns>
public Edge GetEdge(EdgeId edgeId)
{
if (Unrestricted)
{
UnrestrictedEdge headTail;
if (m_unrestrictedEdges.TryGetValue(edgeId, out headTail))
{
VertexType vt = headTail.m_headVertexType;
Vertex head = vt.GetVertex(headTail.m_headVertexId);
vt = headTail.m_tailVertexType;
Vertex tail = vt.GetVertex(headTail.m_tailVertexId);
return(new Edge(MyGraph, this, edgeId, head, tail));
}
}
else
{
UInt64 vertexVertex;
if (m_restrictedEdges.TryGetValue(edgeId, out vertexVertex))
{
VertexId headId = (VertexId)(vertexVertex >> 32);
Vertex head = HeadType.GetVertex(headId);
Vertex tail = TailType.GetVertex((VertexId)vertexVertex);
return(new Edge(MyGraph, this, edgeId, head, tail));
}
}
throw new EdgeDoesNotExistException();
}
/// <summary>
/// Return the vertex referenced by the provided object identifier.
/// If no vertex is referenced by that identifier, then return null.
/// </summary>
/// <param name="id">the identifier of the vertex to retrieved from the graph, must be a UInt64</param>
/// <returns>the vertex referenced by the provided identifier or null when no such vertex exists</returns>
public IVertex GetVertex(object id)
{
if (id == null)
{
throw new ArgumentException("id may not be null, it should be a UInt64");
}
if (id is UInt64)
{
UInt64 fullId = (UInt64)id;
VertexTypeId vertexTypeId = (VertexTypeId)(fullId >> 32);
VertexType vt = vertexType[vertexTypeId];
VertexId vertexId = (VertexId)fullId;
Vertex vertex = vt.GetVertex(vertexId);
return(vertex);
}
if (id is string)
{
UInt64 fullId;
if (UInt64.TryParse(id as string, out fullId))
{
VertexTypeId vertexTypeId = (VertexTypeId)(fullId >> 32);
VertexType vt = vertexType[vertexTypeId];
VertexId vertexId = (VertexId)fullId;
Vertex vertex = vt.GetVertex(vertexId);
return(vertex);
}
}
return(null);
}
/// <summary>
/// Gets an edge given an edge id. Throws if no such edge exist.
/// </summary>
/// <param name="edgeId">The id of the edge</param>
/// <param name="polymorphic">If true and id isn't found in this EdgeType continue search into sub types</param>
/// <param name="errorIfNotFound">Indicate what to do if <see cref="Edge"/> does not exist</param>
/// <returns>The edge with matching id if it exists</returns>
public Edge GetEdge(EdgeId edgeId, bool polymorphic = false, bool errorIfNotFound = true)
{
if (Unrestricted)
{
UnrestrictedEdge headTail;
if (m_unrestrictedEdges.TryGetValue(edgeId, out headTail))
{
VertexType vt = headTail.m_headVertexType;
Vertex head = vt.GetVertex(headTail.m_headVertexId);
vt = headTail.m_tailVertexType;
Vertex tail = vt.GetVertex(headTail.m_tailVertexId);
return(new Edge(MyGraph, this, edgeId, head, tail));
}
}
else
{
UInt64 vertexVertex;
if (m_restrictedEdges.TryGetValue(edgeId, out vertexVertex))
{
VertexId headId = (VertexId)(vertexVertex >> 32);
Vertex head = HeadType.GetVertex(headId);
Vertex tail = TailType.GetVertex((VertexId)vertexVertex);
return(new Edge(MyGraph, this, edgeId, head, tail));
}
}
if (polymorphic)
{
foreach (var et in m_subTypes)
{
var e = et.GetEdge(edgeId, polymorphic, false);
if (e != null)
{
return(e);
}
}
}
if (errorIfNotFound)
{
throw new EdgeDoesNotExistException();
}
return(null);
}
public IEnumerable <Vertex> GetPropertyVertices(T value, VertexType vertexType)
{
VertexId elementId = -1;
if (valueIndexUnique == null || valueIndexUnique.TryGetValue(value, out elementId) == false)
{
BTreeSet <ElementId> elementIds;
if (valueIndex != null && valueIndex.TryGetValue(value, out elementIds))
{
foreach (ElementId eId in elementIds)
{
yield return(vertexType.GetVertex(eId));
}
}
}
if (elementId != -1)
{
yield return(vertexType.GetVertex(elementId));
}
}
public Vertex GetVertex(VertexId id)
{
if (VertexIdSetPerType)
{
throw new NotSupportedException("GetVertex by VertexId on graph level is not supported when using VertexIdSetPerType");
}
VertexTypeId tId;
if (vertexIdToVertexType.TryGetValue(id, out tId))
{
VertexType vt = vertexType[tId];
return(vt.GetVertex(id, false));
}
throw new VertexDoesNotExistException();
}
/// <summary>
/// Try to find a <see cref="Vertex"/> with a given property value.
/// </summary>
/// <param name="value">The property value to look for</param>
/// <param name="polymorphic">If true, also look for property value matching vertices of property <see cref="VertexType"/> sub classes</param>
/// <param name="errorIfNotFound">If true, signal an error if no matching <see cref="Vertex"/> found</param>
/// <returns>A matching Vertex</returns>
public Vertex GetPropertyVertex(T value, bool polymorphic = false, bool errorIfNotFound = true)
{
VertexId elementId = -1;
if (m_valueIndexUnique == null || m_valueIndexUnique.TryGetValue(value, out elementId) == false)
{
BTreeSet <ElementId> elementIds;
if (m_valueIndex != null && m_valueIndex.TryGetValue(value, out elementIds))
{
elementId = elementIds.First();
}
}
if (elementId == -1)
{
return(null);
}
VertexType vertexType = MyGraph.VertexTypes[TypeId];
return(vertexType.GetVertex(elementId, polymorphic, errorIfNotFound));
}
public Vertex GetPropertyVertex(T value, Graph g, bool errorIfNotFound = true)
{
VertexId elementId = -1;
if (valueIndexUnique == null || valueIndexUnique.TryGetValue(value, out elementId) == false)
{
BTreeSet <ElementId> elementIds;
if (valueIndex != null && valueIndex.TryGetValue(value, out elementIds))
{
elementId = elementIds.First();
}
}
if (elementId == -1)
{
return(null);
}
VertexType vertexType = g.vertexType[TypeId];
return(vertexType.GetVertex(elementId, false, errorIfNotFound));
}
/// <summary>
/// Enumerates all edges of this type
/// </summary>
/// <param name="polymorphic">If true, also include all edges of sub types</param>
/// <returns>Enumeration of edges of this type</returns>
public IEnumerable <Edge> GetEdges(bool polymorphic = false)
{
if (Unrestricted)
{
foreach (var m in m_unrestrictedEdges)
{
VertexType vt1 = m.Value.m_headVertexType;
Vertex head = vt1.GetVertex(m.Value.m_headVertexId);
VertexType vt2 = m.Value.m_tailVertexType;
Vertex tail = vt2.GetVertex(m.Value.m_tailVertexId);
yield return(GetEdge(m.Key, tail, head));
}
}
else
{
foreach (var m in m_restrictedEdges)
{
VertexType vt1 = HeadType;
VertexId vId = (VertexId)(m.Value >> 32);
Vertex head = vt1.GetVertex(vId);
VertexType vt2 = TailType;
vId = (VertexId)m.Value;
Vertex tail = vt2.GetVertex(vId);
yield return(GetEdge(m.Key, tail, head));
}
}
if (polymorphic)
{
foreach (EdgeType et in m_subTypes)
{
foreach (Edge e in et.GetEdges(polymorphic))
{
yield return(e);
}
}
}
}
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 Create1Vertices(bool vertexIdSetPerVertexType)
{
DataCache.MaximumMemoryUse = 10000000000; // 10 GB
bool dirExist = Directory.Exists(systemDir);
try
{
if (Directory.Exists(systemDir))
{
Directory.Delete(systemDir, true); // remove systemDir from prior runs and all its databases.
}
Directory.CreateDirectory(systemDir);
File.Copy(licenseDbFile, Path.Combine(systemDir, "4.odb"));
}
catch
{
File.Copy(licenseDbFile, Path.Combine(systemDir, "4.odb"));
}
using (SessionNoServer session = new SessionNoServer(systemDir, 5000, false, true))
{
session.BeginUpdate();
Graph g = new Graph(session, vertexIdSetPerVertexType);
session.Persist(g);
VertexType userType = g.NewVertexType("User");
VertexType otherType = g.NewVertexType("Other");
PropertyType userNamePropertyType = g.NewVertexProperty(userType, "NAME", DataType.String, PropertyKind.Indexed);
VertexType powerUserType = g.NewVertexType("PowerUser", userType);
EdgeType userFriendEdgeType = g.NewEdgeType("Friend", true, userType, userType);
EdgeType userBestFriendEdgeType = g.NewEdgeType("Best Friend", true, userType, userType, userFriendEdgeType);
EdgeType otherEdgeType = g.NewEdgeType("Other", true, userType, userType);
PropertyType bestFriendPropertyType = g.NewEdgeProperty(userFriendEdgeType, "START", DataType.DateTime, PropertyKind.Indexed);
Vertex kinga = userType.NewVertex();
Vertex robin = userType.NewVertex();
Vertex mats = powerUserType.NewVertex();
Vertex chiran = powerUserType.NewVertex();
Vertex other = otherType.NewVertex();
Edge bestFriend = kinga.AddEdge(userBestFriendEdgeType, robin);
Edge otherEdge = kinga.AddEdge(otherEdgeType, robin);
DateTime now = DateTime.Now;
mats.SetProperty("Address", 1);
bestFriend.SetProperty(bestFriendPropertyType, now);
kinga.SetProperty(userNamePropertyType, "Kinga");
if (g.VertexIdSetPerType == false)
{
mats.SetProperty(userNamePropertyType, "Mats");
}
else
{
try
{
mats.SetProperty(userNamePropertyType, "Mats");
Assert.Fail("Invalid property for VertexType not handled");
}
catch (Exception)
{
}
}
try
{
other.SetProperty(userNamePropertyType, "Mats");
Assert.Fail("Invalid property for VertexType not handled");
}
catch (Exception)
{
}
try
{
otherEdge.SetProperty(bestFriendPropertyType, now);
Assert.Fail("Invalid property for VertexType not handled");
}
catch (Exception)
{
}
Vertex findMats = userNamePropertyType.GetPropertyVertex("Mats", true);
var list = userNamePropertyType.GetPropertyVertices("Mats", true).ToList();
//Edge findWhen = bestFriendPropertyType.GetPropertyEdge(now);
//var list2 = bestFriendPropertyType.GetPropertyEdges(now);
Console.WriteLine(findMats);
// session.Commit();
// session.BeginRead();
PropertyType adressProperty = g.FindVertexProperty(powerUserType, "Address");
Vertex find1 = adressProperty.GetPropertyVertex(1, true);
session.Abort();
/*session.BeginUpdate();
* g.Unpersist(session);
* session.Commit();
* dirExist = Directory.Exists(systemDir);
* try
* {
* if (Directory.Exists(systemDir))
* Directory.Delete(systemDir, true); // remove systemDir from prior runs and all its databases.
* Directory.CreateDirectory(systemDir);
* File.Copy(licenseDbFile, Path.Combine(systemDir, "4.odb"));
* }
* catch
* {
* File.Copy(licenseDbFile, Path.Combine(systemDir, "4.odb"));
* }*/
}
using (SessionNoServer session = new SessionNoServer(systemDir, 5000, false, true))
{
session.BeginUpdate();
session.DefaultDatabaseLocation().CompressPages = PageInfo.compressionKind.None;
Graph g = new Graph(session, vertexIdSetPerVertexType);
session.Persist(g);
Graph g2 = new Graph(session);
session.Persist(g2);
Graph g3 = new Graph(session);
session.Persist(g3);
UInt32 dbNum = session.DatabaseNumberOf(typeof(Graph));
Graph g4 = (Graph)session.Open(dbNum, 2, 1, true); // g4 == g
Graph g5 = (Graph)session.Open(dbNum, 2, 2, true); // g5 == g2
Graph g6 = (Graph)session.Open(dbNum, 2, 3, true); // g6 == g3
for (int i = 4; i < 8; i++)
{
Graph gt = new Graph(session);
session.Persist(gt);
}
Graph g7 = new Graph(session);
Placement place = new Placement(dbNum, 15);
session.Persist(place, g7);
// SCHEMA
VertexType userType = g.NewVertexType("User");
VertexType locationType = g.NewVertexType("Location");
VertexType aVertexType = g.NewVertexType("A");
VertexType bVertexType = g.NewVertexType("B");
VertexType cVertexType = g.NewVertexType("C");
EdgeType uEdge = g.NewEdgeType("unrestricted", true);
Vertex aVertex = g.NewVertex(aVertexType);
Vertex bVertex = g.NewVertex(bVertexType);
Vertex cVertex = g.NewVertex(cVertexType);
Edge abEdge = (Edge)aVertex.AddEdge("unrestricted", bVertex);
Edge bcEdge = (Edge)aVertex.AddEdge("unrestricted", cVertex);
Dictionary <Vertex, HashSet <Edge> > traverse = aVertex.Traverse(uEdge, Direction.Out);
abEdge.Remove();
Dictionary <Vertex, HashSet <Edge> > traverse2 = aVertex.Traverse(uEdge, Direction.Out);
EdgeType friendEdgeType = g.NewEdgeType("Friend", true, userType, userType);
EdgeType userLocationEdgeType = g.NewEdgeType("UserLocation", true, userType, locationType);
// DATA
Random rand = new Random(5);
for (int i = 0; i < numberOfUserVertices / 100; i++)
{
int vId = rand.Next(numberOfUserVertices);
try
{
if (g.VertexIdSetPerType)
{
userType.GetVertex(vId);
}
else
{
g.GetVertex(vId);
}
try
{
userType.NewVertex(vId);
Assert.Fail();
}
catch (VertexAllreadyExistException)
{
}
}
catch (VertexDoesNotExistException)
{
userType.NewVertex(vId);
userType.GetVertex(vId);
}
}
for (int i = 0; i < numberOfUserVertices / 10000; i++)
{
int vId = rand.Next(numberOfUserVertices);
try
{
Vertex v = userType.GetVertex(vId);
v.SetProperty("test", 1);
}
catch (VertexDoesNotExistException)
{
}
}
for (int i = 0; i < numberOfUserVertices / 10000; i++)
{
int vId = rand.Next(numberOfUserVertices);
try
{
Vertex v = userType.GetVertex(vId);
userType.RemoveVertex(v);
}
catch (VertexDoesNotExistException)
{
}
}
foreach (Vertex v in userType.GetVertices().ToArray())
{
userType.RemoveVertex(v);
}
Assert.AreEqual(0, userType.GetVertices().Count());
for (int i = 100000; i < numberOfUserVertices; i++)
{
userType.NewVertex();
}
for (int i = 1; i < 100000; i++)
{
userType.NewVertex();
}
for (int i = 1; i < numberOfLocationVertices; i++)
{
locationType.NewVertex();
}
session.Commit();
session.BeginRead();
foreach (var x in session.AllObjects <BTreeSet <Range <VertexId> > >(false, true))
{
Assert.True(x.ToDoBatchAddCount == 0);
}
foreach (var x in session.AllObjects <BTreeSet <EdgeType> >(false, true))
{
Assert.True(x.ToDoBatchAddCount == 0);
}
foreach (var x in session.AllObjects <BTreeSet <EdgeIdVertexId> >(false, true))
{
Assert.True(x.ToDoBatchAddCount == 0);
}
foreach (var x in session.AllObjects <BTreeMap <EdgeId, VelocityDbList <ElementId> > >(false, true))
{
Assert.True(x.ToDoBatchAddCount == 0);
}
foreach (var x in session.AllObjects <BTreeMap <string, PropertyType> >(false, true))
{
Assert.True(x.ToDoBatchAddCount == 0);
}
foreach (var x in session.AllObjects <BTreeMap <string, EdgeType> >(false, true))
{
Assert.True(x.ToDoBatchAddCount == 0);
}
foreach (var x in session.AllObjects <BTreeMap <string, VertexType> >(false, true))
{
Assert.True(x.ToDoBatchAddCount == 0);
}
foreach (var x in session.AllObjects <BTreeMap <VertexId, BTreeSet <EdgeIdVertexId> > >(false, true))
{
Assert.True(x.ToDoBatchAddCount == 0);
}
foreach (var x in session.AllObjects <BTreeMap <VertexType, BTreeMap <VertexId, BTreeSet <EdgeIdVertexId> > > >(false, true))
{
Assert.True(x.ToDoBatchAddCount == 0);
}
foreach (var x in session.AllObjects <BTreeMap <EdgeType, BTreeMap <VertexType, BTreeMap <VertexId, BTreeSet <EdgeIdVertexId> > > > >(false, true))
{
Assert.True(x.ToDoBatchAddCount == 0);
}
session.Commit();
Validate();
}
}
// 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();
}
}