internal virtual void OtherV(GremlinToSqlContext currentContext)
{
GremlinVariableProperty otherProperty = GetVariableProperty(GremlinKeyword.EdgeOtherV);
GremlinBoundVertexVariable otherVertex = new GremlinBoundVertexVariable(otherProperty);
currentContext.VariableList.Add(otherVertex);
currentContext.TableReferences.Add(otherVertex);
currentContext.SetPivotVariable(otherVertex);
}
internal virtual void OutV(GremlinToSqlContext currentContext)
{
GremlinVariableProperty sourceProperty = GetVariableProperty(GremlinKeyword.EdgeSourceV);
GremlinTableVariable outVertex = new GremlinBoundVertexVariable(sourceProperty);
currentContext.VariableList.Add(outVertex);
currentContext.TableReferences.Add(outVertex);
currentContext.SetPivotVariable(outVertex);
}
internal virtual void InV(GremlinToSqlContext currentContext)
{
GremlinVariableProperty sinkProperty = GetVariableProperty(GremlinKeyword.EdgeSinkV);
GremlinTableVariable inVertex = new GremlinBoundVertexVariable(sinkProperty);
currentContext.VariableList.Add(inVertex);
currentContext.TableReferences.Add(inVertex);
currentContext.SetPivotVariable(inVertex);
}
internal void BothV(GremlinVariable lastVariable)
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.EdgeSourceV);
GremlinVariableProperty sinkProperty = lastVariable.GetVariableProperty(GremlinKeyword.EdgeSinkV);
GremlinBoundVertexVariable bothVertex = new GremlinBoundVertexVariable(lastVariable.GetEdgeType(), sourceProperty, sinkProperty);
VariableList.Add(bothVertex);
TableReferences.Add(bothVertex);
SetPivotVariable(bothVertex);
}
internal override GremlinToSqlContext GetContext()
{
GremlinToSqlContext inputContext = GetInputContext();
GremlinTableVariable newVariable;
if (inputContext.PivotVariable == null ||
inputContext.PivotVariable is GremlinFreeVertexVariable ||
inputContext.PivotVariable is GremlinContextVariable)
{
newVariable = new GremlinFreeVertexVariable();
}
else
{
newVariable = new GremlinBoundVertexVariable();
}
if (VertexIdsOrElements.Count > 0)
{
List <WBooleanExpression> booleanExprList = new List <WBooleanExpression>();
foreach (var id in VertexIdsOrElements)
{
if (GremlinUtil.IsNumber(id) || id is string)
{
WScalarExpression firstExpr =
newVariable.GetVariableProperty(GremlinKeyword.NodeID).ToScalarExpression();
WScalarExpression secondExpr = SqlUtil.GetValueExpr(id);
WBooleanComparisonExpression booleanExpr = SqlUtil.GetEqualBooleanComparisonExpr(firstExpr,
secondExpr);
booleanExprList.Add(booleanExpr);
}
else
{
throw new ArgumentException();
}
}
inputContext.AddPredicate(SqlUtil.ConcatBooleanExprWithOr(booleanExprList));
}
inputContext.VariableList.Add(newVariable);
inputContext.TableReferencesInFromClause.Add(newVariable);
inputContext.SetPivotVariable(newVariable);
return(inputContext);
}
internal virtual void Out(GremlinToSqlContext currentContext, List <string> edgeLabels)
{
GremlinVariableProperty sourceProperty = GetVariableProperty(GremlinKeyword.NodeID);
GremlinVariableProperty adjEdge = GetVariableProperty(GremlinKeyword.EdgeAdj);
GremlinBoundEdgeTableVariable outEdgeTable = new GremlinBoundEdgeTableVariable(sourceProperty, adjEdge, WEdgeType.OutEdge);
currentContext.VariableList.Add(outEdgeTable);
currentContext.TableReferences.Add(outEdgeTable);
currentContext.AddLabelPredicateForEdge(outEdgeTable, edgeLabels);
GremlinVariableProperty sinkProperty = outEdgeTable.GetVariableProperty(GremlinKeyword.EdgeSinkV);
GremlinBoundVertexVariable inVertex = new GremlinBoundVertexVariable(sinkProperty);
currentContext.VariableList.Add(inVertex);
currentContext.TableReferences.Add(inVertex);
currentContext.SetPivotVariable(inVertex);
}
internal void OutV(GremlinVariable lastVariable)
{
if (lastVariable is GremlinFreeEdgeTableVariable)
{
var path = GetPathFromPathList(lastVariable);
if (path != null && path.SourceVariable != null)
{
if (IsVariableInCurrentContext(path.SourceVariable))
{
SetPivotVariable(path.SourceVariable);
}
else
{
GremlinContextVariable newContextVariable = GremlinContextVariable.Create(path.SourceVariable);
VariableList.Add(newContextVariable);
SetPivotVariable(newContextVariable);
}
}
else
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.EdgeSourceV);
GremlinTableVariable outVertex = lastVariable.CreateAdjVertex(sourceProperty);
if (path != null)
{
path.SetSourceVariable(outVertex);
}
VariableList.Add(outVertex);
TableReferences.Add(outVertex);
SetPivotVariable(outVertex);
}
}
else
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.EdgeSourceV);
GremlinTableVariable outVertex = new GremlinBoundVertexVariable(lastVariable.GetEdgeType(), sourceProperty);
VariableList.Add(outVertex);
TableReferences.Add(outVertex);
SetPivotVariable(outVertex);
}
}
internal void Out(GremlinVariable lastVariable, List <string> edgeLabels)
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.NodeID);
GremlinVariableProperty adjEdge = lastVariable.GetVariableProperty(GremlinKeyword.EdgeAdj);
GremlinVariableProperty labelProperty = lastVariable.GetVariableProperty(GremlinKeyword.Label);
GremlinBoundEdgeTableVariable outEdgeTable = new GremlinBoundEdgeTableVariable(sourceProperty, adjEdge, labelProperty, WEdgeType.OutEdge);
VariableList.Add(outEdgeTable);
TableReferences.Add(outEdgeTable);
AddLabelPredicateForEdge(outEdgeTable, edgeLabels);
GremlinVariableProperty sinkProperty = outEdgeTable.GetVariableProperty(GremlinKeyword.EdgeSinkV);
GremlinBoundVertexVariable inVertex = new GremlinBoundVertexVariable(outEdgeTable.GetEdgeType(), sinkProperty);
VariableList.Add(inVertex);
TableReferences.Add(inVertex);
AddPath(new GremlinMatchPath(lastVariable, outEdgeTable, inVertex));
SetPivotVariable(inVertex);
}
internal virtual void In(GremlinToSqlContext currentContext, List <string> edgeLabels)
{
GremlinVariableProperty sourceProperty = GetVariableProperty(GremlinKeyword.NodeID);
GremlinVariableProperty adjReverseEdge = GetVariableProperty(GremlinKeyword.ReverseEdgeAdj);
GremlinVariableProperty labelProperty = GetVariableProperty(GremlinKeyword.Label);
GremlinBoundEdgeTableVariable inEdgeTable = new GremlinBoundEdgeTableVariable(sourceProperty, adjReverseEdge,
labelProperty, WEdgeType.InEdge);
currentContext.VariableList.Add(inEdgeTable);
currentContext.TableReferences.Add(inEdgeTable);
currentContext.AddLabelPredicateForEdge(inEdgeTable, edgeLabels);
GremlinVariableProperty edgeProperty = inEdgeTable.GetVariableProperty(GremlinKeyword.EdgeSourceV);
GremlinBoundVertexVariable outVertex = new GremlinBoundVertexVariable(edgeProperty);
currentContext.VariableList.Add(outVertex);
currentContext.TableReferences.Add(outVertex);
//currentContext.PathList.Add(new GremlinMatchPath(outVertex, inEdgeTable, this));
currentContext.SetPivotVariable(outVertex);
}
internal virtual void Both(GremlinToSqlContext currentContext, List <string> edgeLabels)
{
GremlinVariableProperty sourceProperty = GetVariableProperty(GremlinKeyword.NodeID);
GremlinVariableProperty adjEdge = GetVariableProperty(GremlinKeyword.EdgeAdj);
GremlinVariableProperty adjReverseEdge = GetVariableProperty(GremlinKeyword.ReverseEdgeAdj);
GremlinBoundEdgeTableVariable bothEdgeTable = new GremlinBoundEdgeTableVariable(
sourceProperty,
adjEdge,
adjReverseEdge,
WEdgeType.BothEdge);
currentContext.VariableList.Add(bothEdgeTable);
currentContext.TableReferences.Add(bothEdgeTable);
currentContext.AddLabelPredicateForEdge(bothEdgeTable, edgeLabels);
GremlinVariableProperty otherProperty = bothEdgeTable.GetVariableProperty(GremlinKeyword.EdgeOtherV);
GremlinBoundVertexVariable otherVertex = new GremlinBoundVertexVariable(otherProperty);
currentContext.VariableList.Add(otherVertex);
currentContext.TableReferences.Add(otherVertex);
currentContext.SetPivotVariable(otherVertex);
}
internal void OtherV(GremlinVariable lastVariable)
{
switch (lastVariable.GetEdgeType())
{
case WEdgeType.Undefined:
case WEdgeType.BothEdge:
GremlinVariableProperty otherProperty = lastVariable.GetVariableProperty(GremlinKeyword.EdgeOtherV);
GremlinBoundVertexVariable otherVertex = new GremlinBoundVertexVariable(lastVariable.GetEdgeType(), otherProperty);
VariableList.Add(otherVertex);
TableReferences.Add(otherVertex);
SetPivotVariable(otherVertex);
break;
case WEdgeType.InEdge:
OutV(lastVariable);
break;
case WEdgeType.OutEdge:
InV(lastVariable);
break;
}
}
internal void In(GremlinVariable lastVariable, List <string> edgeLabels)
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.NodeID);
GremlinVariableProperty adjReverseEdge = lastVariable.GetVariableProperty(GremlinKeyword.ReverseEdgeAdj);
GremlinVariableProperty labelProperty = lastVariable.GetVariableProperty(GremlinKeyword.Label);
GremlinBoundEdgeTableVariable inEdgeTable = new GremlinBoundEdgeTableVariable(sourceProperty, adjReverseEdge,
labelProperty, WEdgeType.InEdge);
VariableList.Add(inEdgeTable);
TableReferences.Add(inEdgeTable);
AddLabelPredicateForEdge(inEdgeTable, edgeLabels);
GremlinVariableProperty edgeProperty = inEdgeTable.GetVariableProperty(GremlinKeyword.EdgeSourceV);
GremlinBoundVertexVariable outVertex = new GremlinBoundVertexVariable(inEdgeTable.GetEdgeType(), edgeProperty);
VariableList.Add(outVertex);
TableReferences.Add(outVertex);
AddPath(new GremlinMatchPath(outVertex, inEdgeTable, lastVariable));
SetPivotVariable(outVertex);
}
internal void Both(GremlinVariable lastVariable, List <string> edgeLabels)
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.NodeID);
GremlinVariableProperty adjReverseEdge = lastVariable.GetVariableProperty(GremlinKeyword.ReverseEdgeAdj);
GremlinVariableProperty adjEdge = lastVariable.GetVariableProperty(GremlinKeyword.EdgeAdj);
GremlinVariableProperty labelProperty = lastVariable.GetVariableProperty(GremlinKeyword.Label);
GremlinBoundEdgeTableVariable bothEdgeTable = new GremlinBoundEdgeTableVariable(sourceProperty,
adjEdge,
adjReverseEdge,
labelProperty,
WEdgeType.BothEdge);
VariableList.Add(bothEdgeTable);
TableReferences.Add(bothEdgeTable);
AddLabelPredicateForEdge(bothEdgeTable, edgeLabels);
GremlinVariableProperty otherProperty = bothEdgeTable.GetVariableProperty(GremlinKeyword.EdgeOtherV);
GremlinBoundVertexVariable otherVertex = new GremlinBoundVertexVariable(bothEdgeTable.GetEdgeType(), otherProperty);
VariableList.Add(otherVertex);
TableReferences.Add(otherVertex);
SetPivotVariable(otherVertex);
}