public void VisitInsertClause(InsertClause insertClause, QueryModel queryModel)
{
if (insertClause.WithSelector != null)
{
QueryText.Append(" insert ");
GetAqlExpression(insertClause.WithSelector, queryModel);
}
else
{
QueryText.AppendFormat(" insert {0} ", LinqUtility.ResolvePropertyName(insertClause.ItemName));
}
QueryText.AppendFormat(" in {0} ", LinqUtility.ResolveCollectionName(Db, insertClause.CollectionType));
}
public override void VisitMainFromClause(MainFromClause fromClause, QueryModel queryModel)
{
if (fromClause.FromExpression as SubQueryExpression != null)
{
throw new Exception("MainFromClause.FromExpression cant be SubQueryExpression because group by is handle in itself clause");
}
string fromName = LinqUtility.ResolveCollectionName(this.Db, fromClause.ItemType);
// .Select(g => g.Select(gList => gList.Age)) subquery select, changes the fromName to group name (C1 for example)
if (fromClause.FromExpression.Type.Name == "IGrouping`2")
{
var groupByClause = LinqUtility.PriorGroupBy(ParnetModelVisitor);
var parentMVisitor = LinqUtility.FindParentModelVisitor(this);
//parentMVisitor.GroupByNameCounter++;
fromName = groupByClause[0].TranslateIntoName();
fromName = LinqUtility.ResolvePropertyName(fromName);
}
// == "IGrouping`2" => .Select(g => g.Select(gList => gList.Age)) subquery select
if (fromClause.FromExpression.NodeType == ExpressionType.Constant ||
fromClause.FromExpression.Type.Name == "IGrouping`2")
{
if (fromClause.FromExpression.Type.Name == "ArangoQueryable`1" || fromClause.FromExpression.Type.Name == "IGrouping`2")
{
QueryText.AppendFormat(" for {0} in {1} ", LinqUtility.ResolvePropertyName(fromClause.ItemName), fromName);
}
else
{
QueryText.AppendFormat(" for {0} in ", LinqUtility.ResolvePropertyName(fromClause.ItemName));
GetAqlExpression(fromClause.FromExpression, queryModel);
}
}
else
{
QueryText.AppendFormat(" for {0} in ", LinqUtility.ResolvePropertyName(fromClause.ItemName));
GetAqlExpression(fromClause.FromExpression, queryModel);
}
base.VisitMainFromClause(fromClause, queryModel);
}
public override void VisitAdditionalFromClause(AdditionalFromClause fromClause, QueryModel queryModel, int index)
{
var subQuery = fromClause.FromExpression as SubQueryExpression;
if (subQuery != null)
{
this.DontReturn = true;
GetAqlExpression(subQuery, queryModel, handleJoin: true);
}
else if (fromClause.FromExpression.Type.Name == "ArangoQueryable`1")
{
string fromName = LinqUtility.ResolveCollectionName(this.Db, fromClause.ItemType);
QueryText.AppendFormat(" for {0} in {1} ", LinqUtility.ResolvePropertyName(fromClause.ItemName), fromName);
}
else
{
QueryText.AppendFormat(" for {0} in ", LinqUtility.ResolvePropertyName(fromClause.ItemName));
GetAqlExpression(fromClause.FromExpression, queryModel);
}
}
protected override Expression VisitQuerySourceReference(QuerySourceReferenceExpression expression)
{
ModelVisitor.QueryText.AppendFormat(" {0}", LinqUtility.ResolvePropertyName(expression.ReferencedQuerySource.ItemName));
var mainFromClause = expression.ReferencedQuerySource as MainFromClause;
// .Select(g => g.Select(gList => gList.Age)) subquery select, handle prior groupby source parameter names
if (mainFromClause != null && mainFromClause.FromExpression.Type.Name == "IGrouping`2")
{
var groupByClauses = LinqUtility.PriorGroupBy(ModelVisitor);
for (int i = 0; i < groupByClauses.Count; i++)
{
ModelVisitor.QueryText.AppendFormat("{0}{1}{2}"
, i == 0 ? "." : ""
, LinqUtility.ResolvePropertyName(groupByClauses[i].FromParameterName)
, i != groupByClauses.Count - 1 ? "." : "");
}
}
return(expression);
}
public void VisitGroupByClause(GroupByClause groupByClause, QueryModel queryModel, int index)
{
var parentMVisitor = LinqUtility.FindParentModelVisitor(this);
parentMVisitor.GroupByNameCounter++;
groupByClause.IntoName = "C" + parentMVisitor.GroupByNameCounter;
groupByClause.FuncIntoName = Db.Setting.Linq.TranslateGroupByIntoName;
groupByClause.FromParameterName = queryModel.MainFromClause.ItemName;
QueryText.Append(" collect ");
if (groupByClause.Selector.NodeType != ExpressionType.New)
{
groupByClause.CollectVariableName = "CV" + parentMVisitor.GroupByNameCounter;
QueryText.AppendFormat(" {0} = ", LinqUtility.ResolvePropertyName(groupByClause.CollectVariableName));
}
GetAqlExpression(groupByClause.Selector, queryModel, true);
QueryText.AppendFormat(" into {0} ", LinqUtility.ResolvePropertyName(groupByClause.TranslateIntoName()));
groupByClause.Visited = true;
}
protected override Expression VisitParameter(ParameterExpression expression)
{
string name = expression.Name;
if (expression.Type.Name == "TraversalData`2")
{
string prefix = LinqUtility.MemberNameFromMap(name, "graph", ModelVisitor);
ModelVisitor.QueryText.AppendFormat(" {{ {0} : {1}, {2} : {3}, {4} : {5} }} ",
LinqUtility.ResolvePropertyName($"vertex"),
LinqUtility.ResolvePropertyName($"{prefix}_Vertex"),
LinqUtility.ResolvePropertyName($"edge"),
LinqUtility.ResolvePropertyName($"{prefix}_Edge"),
LinqUtility.ResolvePropertyName($"path"),
LinqUtility.ResolvePropertyName($"{prefix}_Path"));
return(expression);
}
if (expression.Type.Name == "ShortestPathData`2")
{
string prefix = LinqUtility.MemberNameFromMap(name, "graph", ModelVisitor);
ModelVisitor.QueryText.AppendFormat(" {{ {0} : {1}, {2} : {3} }} ",
LinqUtility.ResolvePropertyName($"vertex"),
LinqUtility.ResolvePropertyName($"{prefix}_Vertex"),
LinqUtility.ResolvePropertyName($"edge"),
LinqUtility.ResolvePropertyName($"{prefix}_Edge"));
return(expression);
}
ModelVisitor.QueryText.AppendFormat(" {0} ", LinqUtility.ResolvePropertyName(name));
return(expression);
}
public void VisitTraversalClause(ITraversalClause traversalClause, QueryModel queryModel, int index)
{
string prefix = LinqUtility.MemberNameFromMap(traversalClause.Identifier, "graph", this);
if (traversalClause.TargetVertex != null)
{
QueryText.AppendFormat(" for {0}, {1} in ",
LinqUtility.ResolvePropertyName($"{prefix}_Vertex"),
LinqUtility.ResolvePropertyName($"{prefix}_Edge"));
}
else
{
QueryText.AppendFormat(" for {0}, {1}, {2} in ",
LinqUtility.ResolvePropertyName($"{prefix}_Vertex"),
LinqUtility.ResolvePropertyName($"{prefix}_Edge"),
LinqUtility.ResolvePropertyName($"{prefix}_Path"));
}
if (traversalClause.Min != null && traversalClause.Max != null)
{
QueryText.AppendFormat(" {0}..{1} ", traversalClause.Min.Value, traversalClause.Max);
}
QueryText.AppendFormat(" {0} ", traversalClause.Direction != null
? traversalClause.Direction.Value
: Utils.EdgeDirectionToString(EdgeDirection.Any));
if (traversalClause.TargetVertex != null)
{
QueryText.Append(" shortest_path ");
GetAqlExpression(traversalClause.StartVertex, queryModel);
QueryText.Append(" to ");
GetAqlExpression(traversalClause.TargetVertex, queryModel);
}
else
{
GetAqlExpression(traversalClause.StartVertex, queryModel);
}
if (string.IsNullOrEmpty(traversalClause.GraphName) == false)
{
QueryText.AppendFormat(" graph \"{0}\" ", traversalClause.GraphName);
}
else
{
StringBuilder edges = new StringBuilder();
for (int i = 0; i < traversalClause.EdgeCollections.Count; i++)
{
var e = traversalClause.EdgeCollections[i];
if (i != 0)
{
edges.Append(", ");
}
if (e.Direction.HasValue)
{
edges.AppendFormat("{0} ", Utils.EdgeDirectionToString(e.Direction.Value));
}
edges.Append(LinqUtility.ResolvePropertyName(e.CollectionName));
}
QueryText.Append(edges);
}
if (traversalClause.Options != null)
{
QueryText.AppendFormat(" options {0} ", new DocumentSerializer(Db).SerializeWithoutReader(traversalClause.Options.Value));
}
}
public void VisitUpdateReplaceClause(UpdateReplaceClause updateReplaceClause, QueryModel queryModel)
{
if (updateReplaceClause.KeySelector != null)
{
QueryText.AppendFormat(" {0} ", updateReplaceClause.Command);
GetAqlExpression(updateReplaceClause.KeySelector, queryModel);
QueryText.AppendFormat(" with ");
}
else
{
QueryText.AppendFormat(" {0} {1} with ", updateReplaceClause.Command, LinqUtility.ResolvePropertyName(updateReplaceClause.ItemName));
}
GetAqlExpression(updateReplaceClause.WithSelector, queryModel);
QueryText.AppendFormat(" in {0} ", LinqUtility.ResolveCollectionName(Db, updateReplaceClause.CollectionType));
}