public bool HasEdge(Attributes.Edge edge, GraphObject from, GraphObject to)
{
bool hasEdge;
string findEdgeQuery = $"g.E().hasLabel('{edge.EdgeName}').has('_vertexId', '{ from.GraphKey }').has('_sink', '{to.GraphKey}').count()";
FeedResponse <dynamic> reponse = ExecuteCommandQueryDynamic(findEdgeQuery);
hasEdge = Convert.ToInt32(reponse.First()) > 0;
return(hasEdge);
}
private void CreateRelationIfNotExists(GraphObject from, Attributes.Edge att, GraphObject to)
{
object genericRepository;
genericRepository = GetGenericRepository(to.GetType());
genericRepository.GetType().GetMethod("Add").Invoke(genericRepository, new object[] { to, true });
if (!HasEdge(att, from, to))
{
CreateEdge(from, to, att);
}
}
public void CreateEdge(GraphObject from, GraphObject to, Attributes.Edge EdgeAttribute)
{
string addEdge = $"g.V('{from.GraphKey}').addE('{EdgeAttribute.EdgeName}').to(g.V('{to.GraphKey}'))",
valueToString = string.Empty;
object valueToObject = null;
if (!EdgeAttribute.IgnoreEdgeProperties)
{
Attribute edgeAtt;
foreach (PropertyInfo prop in to.GetType().GetProperties())
{
edgeAtt = prop.GetCustomAttribute(typeof(EdgeProperty));
if (edgeAtt != null)
{
if (prop.PropertyType.BaseType == typeof(Enum))
{
addEdge += $".property(\"{prop.Name}\", {(int)prop.GetValue(to)})";
}
else if (prop.PropertyType == typeof(Int32))
{
addEdge += $".property(\"{prop.Name}\", {prop.GetValue(to)})";
}
else if (prop.PropertyType == typeof(DateTime))
{
addEdge += $".property(\"{prop.Name}\", \"{((DateTime)prop.GetValue(to)).ToString()}\")";
}
else
{
valueToObject = prop.GetValue(to);
if (valueToObject != null)
{
valueToString = valueToObject.ToString().Replace("'", "’");
addEdge += $".property(\"{prop.Name}\", \"{valueToString}\")";
}
else
{
addEdge += $".property(\"{prop.Name}\", \"{valueToObject}\")";
}
}
}
}
}
ExecuteCommandEdge(addEdge);
}