protected override Expression VisitNewExpression(NewExpression expression)
{
if (expression.Type.Name == "Grouping`2")
{
var groupByClause = LinqUtility.PriorGroupBy(ModelVisitor)[0];
ModelVisitor.QueryText.AppendFormat(" {0} ", LinqUtility.ResolvePropertyName(groupByClause.TranslateIntoName()));
return(expression);
}
if (!TreatNewWithoutBracket)
{
ModelVisitor.QueryText.Append(" { ");
}
var e = (NewExpression)NamedExpression.CreateNewExpressionWithNamedArguments(ModelVisitor.Db, expression);
for (int i = 0; i < e.Arguments.Count; i++)
{
VisitExpression(e.Arguments[i]);
if (i != e.Arguments.Count - 1)
{
ModelVisitor.QueryText.Append(" , ");
}
}
if (!TreatNewWithoutBracket)
{
ModelVisitor.QueryText.Append(" } ");
}
return(e);
}
public void VisitLetClause(LetClause letClause, QueryModel queryModel, Type lhsType)
{
QueryText.AppendFormat(" let {0} = ", LinqUtility.ResolvePropertyName(letClause.ItemName));
GetAqlExpression(letClause.LetExpression, queryModel);
var subQuery = letClause.SubqueryExpression as SubQueryExpression;
if (subQuery != null)
{
GetAqlExpression(subQuery, queryModel, handleLet: true);
this.DontReturn = true;
}
}
public static Expression WrapIntoNamedExpression(IArangoDatabase db, MemberInfo memberInfo, Expression argumentExpression)
{
var memberName = LinqUtility.ResolveMemberNameRaw(db, memberInfo);
var expressionAsNamedExpression = argumentExpression as NamedExpression;
if (expressionAsNamedExpression != null && expressionAsNamedExpression.Name == memberName)
{
return(expressionAsNamedExpression);
}
var namedExpression = CreateFromMemberName(memberName, argumentExpression);
return(namedExpression);
}
protected override Expression VisitConstantExpression(ConstantExpression expression)
{
var parentModelVisitor = LinqUtility.FindParentModelVisitor(this.ModelVisitor);
parentModelVisitor.ParameterNameCounter++;
string parameterName = "P" + parentModelVisitor.ParameterNameCounter;
parentModelVisitor.QueryData.BindVars.Add(new QueryParameter()
{
Name = parameterName, Value = expression.Value
});
ModelVisitor.QueryText.AppendFormat(" @{0} ", parameterName);
return(expression);
}
public void VisitUpsertAndReturnClause(UpsertAndReturnClause upsertAndReturnClause, QueryModel queryModel)
{
QueryText.Append(" upsert ");
GetAqlExpression(upsertAndReturnClause.SearchSelector, queryModel);
QueryText.Append(" insert ");
GetAqlExpression(upsertAndReturnClause.InsertSelector, queryModel);
QueryText.Append(" update ");
GetAqlExpression(upsertAndReturnClause.UpdateSelector, queryModel);
CrudState.ModelVisitorHaveCrudOperation = true;
CrudState.Collection = LinqUtility.ResolveCollectionName(Db, upsertAndReturnClause.CollectionType);
CrudState.ReturnResult = upsertAndReturnClause.ReturnResult;
CrudState.ReturnResultKind = "NEW";
}
public void VisitRemoveAndReturnClause(RemoveAndReturnClause removeAndReturnClause, QueryModel queryModel)
{
if (removeAndReturnClause.KeySelector != null)
{
QueryText.Append(" remove ");
GetAqlExpression(removeAndReturnClause.KeySelector, queryModel);
}
else
{
QueryText.AppendFormat(" remove {0} ", LinqUtility.ResolvePropertyName(removeAndReturnClause.ItemName));
}
CrudState.ModelVisitorHaveCrudOperation = true;
CrudState.Collection = LinqUtility.ResolveCollectionName(Db, removeAndReturnClause.CollectionType);
CrudState.ReturnResult = removeAndReturnClause.ReturnResult;
CrudState.ReturnResultKind = "OLD";
}
public void VisitInsertAndReturnClause(InsertAndReturnClause insertAndReturnClause, QueryModel queryModel)
{
if (insertAndReturnClause.WithSelector != null)
{
QueryText.Append(" insert ");
GetAqlExpression(insertAndReturnClause.WithSelector, queryModel);
}
else
{
QueryText.AppendFormat(" insert {0} ", LinqUtility.ResolvePropertyName(insertAndReturnClause.ItemName));
}
CrudState.ModelVisitorHaveCrudOperation = true;
CrudState.Collection = LinqUtility.ResolveCollectionName(Db, insertAndReturnClause.CollectionType);
CrudState.ReturnResult = insertAndReturnClause.ReturnResult;
CrudState.ReturnResultKind = "NEW";
}
protected override Expression VisitMemberExpression(MemberExpression expression)
{
var member = expression.Expression as MemberExpression;
if ((member != null && member.Expression.Type.Name == "IGrouping`2"))
{
ModelVisitor.QueryText.AppendFormat(" {0} ", LinqUtility.ResolvePropertyName(expression.Member.Name));
}
else if (expression.Expression.Type.Name == "IGrouping`2")
{
var groupByClause = LinqUtility.PriorGroupBy(ModelVisitor)[0];
var newExpression = groupByClause.Selector as NewExpression;
if (newExpression != null)
{
ModelVisitor.QueryText.Append(" { ");
for (int i = 0; i < newExpression.Members.Count; i++)
{
string memberName = newExpression.Members[i].Name;
ModelVisitor.QueryText.AppendFormat(" {0} : {1} ",
LinqUtility.ResolvePropertyName(memberName),
LinqUtility.ResolvePropertyName(memberName));
if (i != newExpression.Members.Count - 1)
{
ModelVisitor.QueryText.Append(" , ");
}
}
ModelVisitor.QueryText.Append(" } ");
}
if (groupByClause.Selector.NodeType != ExpressionType.New)
{
ModelVisitor.QueryText.AppendFormat(" {0} ", LinqUtility.ResolvePropertyName(groupByClause.CollectVariableName));
}
}
else
{
VisitExpression(expression.Expression);
ModelVisitor.QueryText.AppendFormat(".{0} ", LinqUtility.ResolveMemberName(ModelVisitor.Db, expression.Member));
}
return(expression);
}
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);
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);
}
if (fromClause.FromExpression.NodeType == ExpressionType.Constant ||
fromClause.FromExpression.Type.Name == "IGrouping`2")
{
if (fromClause.FromExpression.Type.Name == "AqlQueryable`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 == "AqlQueryable`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 VisitQuerySourceReferenceExpression(QuerySourceReferenceExpression expression)
{
ModelVisitor.QueryText.AppendFormat(" {0}", LinqUtility.ResolvePropertyName(expression.ReferencedQuerySource.ItemName));
var mainFromClause = expression.ReferencedQuerySource as MainFromClause;
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 VisitUpdateAndReturnClause(UpdateAndReturnClause updateAndReturnClause, QueryModel queryModel)
{
if (updateAndReturnClause.KeySelector != null)
{
QueryText.AppendFormat(" {0} ", updateAndReturnClause.Command);
GetAqlExpression(updateAndReturnClause.KeySelector, queryModel);
QueryText.AppendFormat(" with ");
}
else
{
QueryText.AppendFormat(" {0} {1} with ", updateAndReturnClause.Command, LinqUtility.ResolvePropertyName(updateAndReturnClause.ItemName));
}
GetAqlExpression(updateAndReturnClause.WithSelector, queryModel);
CrudState.ModelVisitorHaveCrudOperation = true;
CrudState.Collection = LinqUtility.ResolveCollectionName(Db, updateAndReturnClause.CollectionType);
CrudState.ReturnResult = updateAndReturnClause.ReturnResult;
CrudState.ReturnResultKind = updateAndReturnClause.ReturnNewResult ? "NEW" : "OLD";
}
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 VisitMethodCallExpression(MethodCallExpression expression)
{
if (expression.Method.Name == "As")
{
VisitExpression(expression.Arguments[0]);
return(expression);
}
string methodName;
var userFunction = ModelVisitor.Db.SharedSetting.AqlFunctions.FindFunctionAttribute(expression.Method);
bool methodExists = userFunction != null;
if (methodExists)
{
methodName = userFunction.Name;
}
else
{
methodExists = aqlMethods.TryGetValue(expression.Method.Name, out methodName);
}
if (!methodExists)
{
throw new InvalidOperationException($"Method {expression.Method.Name} is not supported in AqlLinqProvider");
}
string argumentSeprator = null;
bool noParenthesis = methodsWithNoParenthesis.TryGetValue(methodName, out argumentSeprator);
if (!noParenthesis)
{
ModelVisitor.QueryText.AppendFormat(" {0}( ", methodName);
argumentSeprator = " , ";
}
Type[] genericArguments = null;
if (methodsWithFirstGenericArgument.Contains(methodName))
{
genericArguments = expression.Method.GetGenericArguments();
var collection = LinqUtility.ResolveCollectionName(ModelVisitor.Db, genericArguments[0]);
ModelVisitor.QueryText.AppendFormat(" {0}{1}", collection, argumentSeprator);
}
if (methodsWithSecondGenericArgument.Contains(methodName))
{
var collection = LinqUtility.ResolveCollectionName(ModelVisitor.Db, genericArguments[1]);
ModelVisitor.QueryText.AppendFormat(" {0}{1}", collection, argumentSeprator);
}
for (int i = 0; i < expression.Arguments.Count; i++)
{
VisitExpression(expression.Arguments[i]);
if (i != expression.Arguments.Count - 1)
{
ModelVisitor.QueryText.Append(argumentSeprator);
}
}
if (!noParenthesis)
{
ModelVisitor.QueryText.Append(" ) ");
}
return(expression);
}
protected override Expression VisitParameterExpression(ParameterExpression expression)
{
ModelVisitor.QueryText.AppendFormat(" {0} ", LinqUtility.ResolvePropertyName(expression.Name));
return(expression);
}
