private static IEnumerable <IGremlinQuery <string> > CreateIndexQueries(this IDseGraphModel model, IImmutableDictionary <Type, IImmutableSet <Expression> > indexDictionary, string keyword, IIdentifierFactory identifierFactory)
{
return(model.VertexLabels
.Where(vertexKvp => !vertexKvp.Key.GetTypeInfo().IsAbstract)
.Select(vertexKvp => (
Label: vertexKvp.Value,
IndexProperties: vertexKvp.Key
.GetTypeHierarchy(model)
.SelectMany(x => indexDictionary
.TryGetValue(x)
.AsEnumerable()
.SelectMany(y => y))
.Select(indexExpression => ((indexExpression as LambdaExpression)?.Body.StripConvert() as MemberExpression)?.Member.Name)
.ToImmutableList()))
.Where(tuple => !tuple.IndexProperties.IsEmpty)
.Select(tuple => tuple.IndexProperties
.Aggregate(
GremlinQuery
.Create("schema")
.AddStep <string>("vertexLabel", tuple.Label)
.AddStep <string>("index", identifierFactory.CreateIndexName())
.AddStep <string>(keyword),
(closureQuery, indexProperty) => closureQuery.AddStep <string>("by", indexProperty))
.AddStep <string>("add")));
}
private static IEnumerable <IGremlinQuery <string> > CreateEdgeIndexQueries(this IDseGraphModel model, IIdentifierFactory identifierFactory)
{
return(model.EdgeIndexes.Keys
.SelectMany(edgeType => model
.GetDerivedTypes(edgeType, true)
.Where(inheritedType => !inheritedType.GetTypeInfo().IsAbstract)
.SelectMany(inheritedType => model
.EdgeIndexes[inheritedType]
.Where(index => index.direction != EdgeDirection.None)
.SelectMany(index => model
.GetDerivedTypes(index.vertexType, true)
.Where(inheritedVertexType => !inheritedVertexType.GetTypeInfo().IsAbstract)
.Select(inheritedVertexType => GremlinQuery <string>
.Create("schema")
.AddStep("vertexLabel", model.GetLabelOfType(inheritedVertexType))
.AddStep("index", identifierFactory.CreateIndexName())
.AddStep(
index.direction == EdgeDirection.Out
? "outE"
: index.direction == EdgeDirection.In
? "inE"
: "bothE",
model.GetLabelOfType(edgeType))
.AddStep("by", ((index.indexExpression as LambdaExpression)?.Body.StripConvert() as MemberExpression)?.Member.Name)
.AddStep("add"))))));
}
