/// <summary>
/// Registers a mapping between correlated collection query models and metadata needed to process them.
/// </summary>
/// <param name="mainFromClause"> The main from clause.</param>
/// <param name="trackingQuery"> Flag indicating whether query should be tracked or not. </param>
/// <param name="firstNavigation"> First navigation in the chain leading to collection navigation that is being optimized. </param>
/// <param name="collectionNavigation"> Collection navigation that is being optimized. </param>
/// <param name="parentQuerySource"> Query source that is origin of the collection navigation. </param>
public virtual void RegisterCorrelatedSubqueryMetadata(
[NotNull] MainFromClause mainFromClause,
bool trackingQuery,
[NotNull] INavigation firstNavigation,
[NotNull] INavigation collectionNavigation,
[NotNull] IQuerySource parentQuerySource)
{
Check.NotNull(mainFromClause, nameof(mainFromClause));
Check.NotNull(firstNavigation, nameof(firstNavigation));
Check.NotNull(collectionNavigation, nameof(collectionNavigation));
Check.NotNull(parentQuerySource, nameof(parentQuerySource));
if (_correlatedSubqueryMetadataMap == null)
{
_correlatedSubqueryMetadataMap = new Dictionary <MainFromClause, CorrelatedSubqueryMetadata>();
}
_correlatedSubqueryMetadataMap[mainFromClause]
= new CorrelatedSubqueryMetadata(
_correlatedSubqueryMetadataMap.Count,
trackingQuery,
firstNavigation,
collectionNavigation,
parentQuerySource);
}
/// <summary>
/// Looks up a mapping between correlated collection query models and metadata needed to process them.
/// </summary>
/// <param name="mainFromClause"> The main from clause.</param>
/// <param name="correlatedSubqueryMetadata"> The correlated sub-query metadata. </param>
/// <returns> <c>True</c> if correlated sub-query metadata was registered; <c>false</c> otherwise. </returns>
public virtual bool TryGetCorrelatedSubqueryMetadata(
[NotNull] MainFromClause mainFromClause,
[CanBeNull] out CorrelatedSubqueryMetadata correlatedSubqueryMetadata)
{
Check.NotNull(mainFromClause, nameof(mainFromClause));
correlatedSubqueryMetadata = null;
return(_correlatedSubqueryMetadataMap?.TryGetValue(mainFromClause, out correlatedSubqueryMetadata) == true);
}
