internal void DropProperties(GremlinVariable belongToVariable, List <string> PropertyKeys)
{
List <object> properties = new List <object>();
foreach (var propertyKey in PropertyKeys)
{
properties.Add(propertyKey);
properties.Add(null);
}
if (PropertyKeys.Count == 0)
{
properties.Add(GremlinKeyword.Star);
properties.Add(null);
}
GremlinUpdatePropertiesVariable dropVariable = null;
switch (belongToVariable.GetVariableType())
{
case GremlinVariableType.Vertex:
dropVariable = new GremlinUpdateVertexPropertiesVariable(belongToVariable, properties);
break;
case GremlinVariableType.Edge:
dropVariable = new GremlinUpdateEdgePropertiesVariable(belongToVariable, properties);
break;
}
VariableList.Add(dropVariable);
TableReferences.Add(dropVariable);
SetPivotVariable(dropVariable);
}
internal void Value(GremlinVariable lastVariable)
{
GremlinValueVariable newVariable = new GremlinValueVariable(lastVariable.DefaultVariableProperty());
VariableList.Add(newVariable);
TableReferences.Add(newVariable);
SetPivotVariable(newVariable);
}
internal void DropVertex(GremlinVariable dropVertexVariable)
{
GremlinVariableProperty variableProperty = dropVertexVariable.GetVariableProperty(GremlinKeyword.NodeID);
GremlinDropVariable dropVariable = new GremlinDropVertexVariable(variableProperty);
VariableList.Add(dropVariable);
TableReferences.Add(dropVariable);
SetPivotVariable(dropVariable);
}
internal void DropEdge(GremlinVariable dropEdgeVariable)
{
var sourceProperty = dropEdgeVariable.GetVariableProperty(GremlinKeyword.EdgeSourceV);
var edgeProperty = dropEdgeVariable.GetVariableProperty(GremlinKeyword.EdgeID);
GremlinDropVariable dropVariable = new GremlinDropEdgeVariable(sourceProperty, edgeProperty);
VariableList.Add(dropVariable);
TableReferences.Add(dropVariable);
SetPivotVariable(dropVariable);
}
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 void OutE(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);
AddPath(new GremlinMatchPath(lastVariable, outEdgeTable, null));
SetPivotVariable(outEdgeTable);
}
internal void BothE(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);
SetPivotVariable(bothEdgeTable);
}
internal void PopulateGremlinPath()
{
if (IsPopulateGremlinPath)
{
return;
}
GremlinPathVariable newVariable = new GremlinPathVariable(GetCurrAndChildGremlinStepList());
VariableList.Add(newVariable);
TableReferences.Add(newVariable);
CurrentContextPath = newVariable;
IsPopulateGremlinPath = true;
}
internal void Values(GremlinVariable lastVariable, List <string> propertyKeys)
{
if (propertyKeys.Count == 0)
{
lastVariable.Populate(GremlinKeyword.Star);
}
else
{
foreach (var property in propertyKeys)
{
lastVariable.Populate(property);
}
}
GremlinValuesVariable newVariable = new GremlinValuesVariable(lastVariable, propertyKeys);
VariableList.Add(newVariable);
TableReferences.Add(newVariable);
SetPivotVariable(newVariable);
}
internal void PopulateLocalPath()
{
if (ContextLocalPath != null)
{
return;
}
ProjectedProperties.Add(GremlinKeyword.Path);
foreach (var step in StepList)
{
step.PopulateLocalPath();
}
GremlinLocalPathVariable newVariable = new GremlinLocalPathVariable(StepList);
VariableList.Add(newVariable);
TableReferences.Add(newVariable);
ContextLocalPath = newVariable;
}
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 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);
}