public virtual void VisitAdditionalFromClause (AdditionalFromClause fromClause, QueryModel queryModel, int index)
{
ArgumentUtility.CheckNotNull ("fromClause", fromClause);
ArgumentUtility.CheckNotNull ("queryModel", queryModel);
// nothing to do here
}
/// <summary>
/// Clones this clause, registering its clone with the <paramref name="cloneContext"/>.
/// </summary>
/// <param name="cloneContext">The clones of all query source clauses are registered with this <see cref="CloneContext"/>.</param>
/// <returns>A clone of this clause.</returns>
public virtual AdditionalFromClause Clone (CloneContext cloneContext)
{
ArgumentUtility.CheckNotNull ("cloneContext", cloneContext);
var clone = new AdditionalFromClause (ItemName, ItemType, FromExpression);
cloneContext.QuerySourceMapping.AddMapping (this, new QuerySourceReferenceExpression (clone));
return clone;
}
public override void VisitAdditionalFromClause (AdditionalFromClause fromClause, QueryModel queryModel, int index)
{
ArgumentUtility.CheckNotNull ("fromClause", fromClause);
ArgumentUtility.CheckNotNull ("queryModel", queryModel);
var subQueryExpression = fromClause.FromExpression as SubQueryExpression;
if (subQueryExpression != null)
FlattenSubQuery (subQueryExpression, fromClause, queryModel, index + 1);
base.VisitAdditionalFromClause (fromClause, queryModel, index);
}
/// <summary>
/// Modifies the given query model for fetching, adding an <see cref="AdditionalFromClause"/> and changing the <see cref="SelectClause.Selector"/> to
/// retrieve the result of the <see cref="AdditionalFromClause"/>.
/// For example, a fetch request such as <c>FetchMany (x => x.Orders)</c> will be transformed into a <see cref="AdditionalFromClause"/> selecting
/// <c>y.Orders</c> (where <c>y</c> is what the query model originally selected) and a <see cref="SelectClause"/> selecting the result of the
/// <see cref="AdditionalFromClause"/>.
/// This method is called by <see cref="FetchRequestBase.CreateFetchQueryModel"/> in the process of creating the new fetch query model.
/// </summary>
protected override void ModifyFetchQueryModel (QueryModel fetchQueryModel)
{
ArgumentUtility.CheckNotNull ("fetchQueryModel", fetchQueryModel);
var fromExpression = GetFetchedMemberExpression (new QuerySourceReferenceExpression (fetchQueryModel.MainFromClause));
var memberFromClause = new AdditionalFromClause (fetchQueryModel.GetNewName ("#fetch"), _relatedObjectType, fromExpression);
fetchQueryModel.BodyClauses.Add (memberFromClause);
var newSelector = new QuerySourceReferenceExpression (memberFromClause);
var newSelectClause = new SelectClause (newSelector);
fetchQueryModel.SelectClause = newSelectClause;
}
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 QueryModel ApplyNodeSpecificSemantics (QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("queryModel", queryModel);
var resolvedCollectionSelector = GetResolvedCollectionSelector (clauseGenerationContext);
var clause = new AdditionalFromClause (ResultSelector.Parameters[1].Name, ResultSelector.Parameters[1].Type, resolvedCollectionSelector);
queryModel.BodyClauses.Add (clause);
clauseGenerationContext.AddContextInfo (this, clause);
var selectClause = queryModel.SelectClause;
selectClause.Selector = GetResolvedResultSelector (clauseGenerationContext);
return queryModel;
}
