/*--------------------------------------------------------------------------------------------*/
private static void ConfirmVciState <TEdge, TVert> (TEdge pEdge,
Expression <Func <TVert, object> > pProperty)
where TEdge : IWeaverEdge where TVert : IWeaverVertex
{
Type et = typeof(TEdge);
Type vt = typeof(TVert);
WeaverTitanUtil.GetAndVerifyElementAttribute <WeaverTitanEdgeAttribute> (et);
WeaverTitanUtil.GetAndVerifyElementAttribute <WeaverTitanVertexAttribute> (vt);
if (pEdge.OutVertexType != vt && pEdge.InVertexType != vt)
{
throw new WeaverException("Vertex type '" + vt.Name + "' is not valid for edge type '" +
et.Name + "'.");
}
WeaverPropPair wpp = WeaverUtil.GetPropertyAttribute(pProperty);
WeaverTitanPropertyAttribute att = WeaverTitanUtil.GetAndVerifyTitanPropertyAttribute(wpp);
if (!att.HasTitanVertexCentricIndex(et))
{
throw new WeaverException("Property '" + vt.Name + "." + wpp.Info.Name + "' does not have a " +
"vertex-centric index for edge '" + et.Name + "'.");
}
}
/*--------------------------------------------------------------------------------------------*/
private IWeaverQuery FinishEdgeVci <TEdge>(TEdge pEdge, string pOutV, string pInV,
string pScript) where TEdge : IWeaverEdge
{
Type et = typeof(TEdge);
var e = WeaverTitanUtil.GetAndVerifyElementAttribute <WeaverTitanEdgeAttribute>(et);
string labelParam = Path.Query.AddStringParam(e.DbName);
string propList = WeaverUtil.BuildPropList(Path.Config, Path.Query, pEdge);
var sb = new StringBuilder();
AppendEdgeVciProps(sb, pOutV, et, WeaverUtil.GetElementPropertyAttributes(e.OutVertex));
AppendEdgeVciProps(sb, pInV, et, WeaverUtil.GetElementPropertyAttributes(e.InVertex));
const string tryLoop = "_TRY.each{k,v->if((z=v.getProperty(k))){_PROP.put(k,z)}};";
bool showTry = (sb.Length > 0);
string propLine = (propList.Length > 0 || showTry ?
"_PROP=" + (propList.Length > 0 ? "[" + propList + "];" : "[:];") : "");
Path.Query.FinalizeQuery(
pScript +
propLine +
(showTry ? "_TRY=[" + sb + "];" + tryLoop : "") +
"g.addEdge(" + pOutV + "," + pInV + "," + labelParam + (propLine.Length > 0 ? ",_PROP" : "") + ")"
);
return(Path.Query);
}
////////////////////////////////////////////////////////////////////////////////////////////////
/*--------------------------------------------------------------------------------------------*/
public IWeaverQuery TypeGroupOf <T>(int pId) where T : IWeaverVertex
{
if (pId < 2)
{
throw new WeaverException("Group ID must be greater than 1.");
}
WeaverTitanUtil.GetAndVerifyElementAttribute <WeaverVertexAttribute>(typeof(T));
var q = new WeaverQuery();
q.FinalizeQuery(
"com.thinkaurelius.titan.core.TypeGroup.of(" +
q.AddParam(new WeaverQueryVal(pId)) + ",'group')"
);
return(q);
}
/*--------------------------------------------------------------------------------------------*/
public IWeaverPathPipeEnd BuildEdgeLabel <T>(
Func <string, IWeaverVarAlias> pGetPropVarAliasByDbName) where T : IWeaverEdge
{
Type et = typeof(T);
var e = WeaverTitanUtil.GetAndVerifyElementAttribute <WeaverTitanEdgeAttribute>(et);
var ivc = e.InConn;
var ovc = e.OutConn;
var props = new List <WeaverPropPair>();
props.AddRange(WeaverUtil.GetElementPropertyAttributes(e.OutVertex));
props.AddRange(WeaverUtil.GetElementPropertyAttributes(e.InVertex));
var keys = new HashSet <string>();
var sigs = new HashSet <string>();
foreach (WeaverPropPair wpp in props)
{
WeaverTitanPropertyAttribute att =
WeaverTitanUtil.GetAndVerifyTitanPropertyAttribute(wpp, true);
if (att == null)
{
continue;
}
string alias = pGetPropVarAliasByDbName(att.DbName).Name;
if (att.HasTitanVertexCentricIndex(et))
{
keys.Add(alias);
continue;
}
sigs.Add(alias);
}
////
AddCustom("makeType()");
AddCustom("name(" + Path.Query.AddParam(new WeaverQueryVal(e.DbName)) + ")");
if (keys.Count > 0)
{
AddCustom("primaryKey(" + string.Join(",", keys) + ")");
}
if (sigs.Count > 0)
{
AddCustom("signature(" + string.Join(",", sigs) + ")");
}
// An edge label is out-unique, if a vertex has at most one outgoing edge for that label.
// "father" is of an out-unique edge label, since each god has at most one father.
// https://github.com/thinkaurelius/titan/wiki/Type-Definition-Overview
if (ivc == WeaverEdgeConn.InOne || ivc == WeaverEdgeConn.InZeroOrOne)
{
AddCustom("unique(IN)");
}
if (ovc == WeaverEdgeConn.OutOne || ovc == WeaverEdgeConn.OutZeroOrOne)
{
AddCustom("unique(OUT)");
}
return(AddCustom("makeEdgeLabel()"));
}
/*--------------------------------------------------------------------------------------------*/
public IWeaverPathPipeEnd MakeEdgePropertyKey <T>(Expression <Func <T, object> > pProperty,
IWeaverVarAlias pGroupVar = null) where T : IWeaverEdge
{
WeaverTitanUtil.GetAndVerifyElementAttribute <WeaverTitanEdgeAttribute>(typeof(T));
return(MakePropertyKey("Edge", pProperty, pGroupVar));
}