private void ConvertSpanPath(
ObjectFullSpanRewriter.SpanPathInfo parentInfo,
List <string> navPropNames,
int pos)
{
NavigationProperty index = (NavigationProperty)null;
if (!parentInfo.DeclaringType.NavigationProperties.TryGetValue(navPropNames[pos], true, out index))
{
throw new InvalidOperationException(Strings.ObjectQuery_Span_NoNavProp((object)parentInfo.DeclaringType.FullName, (object)navPropNames[pos]));
}
if (parentInfo.Children == null)
{
parentInfo.Children = new Dictionary <NavigationProperty, ObjectFullSpanRewriter.SpanPathInfo>();
}
ObjectFullSpanRewriter.SpanPathInfo parentInfo1 = (ObjectFullSpanRewriter.SpanPathInfo)null;
if (!parentInfo.Children.TryGetValue(index, out parentInfo1))
{
parentInfo1 = new ObjectFullSpanRewriter.SpanPathInfo(ObjectFullSpanRewriter.EntityTypeFromResultType(index));
parentInfo.Children[index] = parentInfo1;
}
if (pos >= navPropNames.Count - 1)
{
return;
}
this.ConvertSpanPath(parentInfo1, navPropNames, pos + 1);
}
private static EntityType EntityTypeFromResultType(NavigationProperty navProp)
{
EntityType entityType = (EntityType)null;
ObjectFullSpanRewriter.TryGetEntityType(navProp.TypeUsage, out entityType);
return(entityType);
}
internal ObjectFullSpanRewriter(
DbCommandTree tree,
DbExpression toRewrite,
Span span,
AliasGenerator aliasGenerator)
: base(tree, toRewrite, aliasGenerator)
{
EntityType entityType = (EntityType)null;
if (!ObjectFullSpanRewriter.TryGetEntityType(this.Query.ResultType, out entityType))
{
throw new InvalidOperationException(Strings.ObjectQuery_Span_IncludeRequiresEntityOrEntityCollection);
}
ObjectFullSpanRewriter.SpanPathInfo parentInfo = new ObjectFullSpanRewriter.SpanPathInfo(entityType);
foreach (Span.SpanPath span1 in span.SpanList)
{
this.AddSpanPath(parentInfo, span1.Navigations);
}
this._currentSpanPath.Push(parentInfo);
}
internal static bool TryRewrite(
DbQueryCommandTree tree, Span span, MergeOption mergeOption, AliasGenerator aliasGenerator, out DbExpression newQuery,
out SpanIndex spanInfo)
{
newQuery = null;
spanInfo = null;
ObjectSpanRewriter rewriter = null;
var requiresRelationshipSpan = Span.RequiresRelationshipSpan(mergeOption);
// Potentially perform a rewrite for span.
// Note that the public 'Span' property is NOT used to retrieve the Span instance
// since this forces creation of a Span object that may not be required.
if (span != null &&
span.SpanList.Count > 0)
{
rewriter = new ObjectFullSpanRewriter(tree, tree.Query, span, aliasGenerator);
}
else if (requiresRelationshipSpan)
{
rewriter = new ObjectSpanRewriter(tree, tree.Query, aliasGenerator);
}
if (rewriter != null)
{
rewriter.RelationshipSpan = requiresRelationshipSpan;
newQuery = rewriter.RewriteQuery();
if (newQuery != null)
{
Debug.Assert(
rewriter.SpanIndex != null || tree.Query.ResultType.EdmEquals(newQuery.ResultType),
"Query was rewritten for Span but no SpanIndex was created?");
spanInfo = rewriter.SpanIndex;
}
}
return(spanInfo != null);
}
internal static bool TryRewrite(
DbQueryCommandTree tree, Span span, MergeOption mergeOption, AliasGenerator aliasGenerator, out DbExpression newQuery,
out SpanIndex spanInfo)
{
newQuery = null;
spanInfo = null;
ObjectSpanRewriter rewriter = null;
var requiresRelationshipSpan = Span.RequiresRelationshipSpan(mergeOption);
// Potentially perform a rewrite for span.
// Note that the public 'Span' property is NOT used to retrieve the Span instance
// since this forces creation of a Span object that may not be required.
if (span != null
&& span.SpanList.Count > 0)
{
rewriter = new ObjectFullSpanRewriter(tree, tree.Query, span, aliasGenerator);
}
else if (requiresRelationshipSpan)
{
rewriter = new ObjectSpanRewriter(tree, tree.Query, aliasGenerator);
}
if (rewriter != null)
{
rewriter.RelationshipSpan = requiresRelationshipSpan;
newQuery = rewriter.RewriteQuery();
if (newQuery != null)
{
Debug.Assert(
rewriter.SpanIndex != null || tree.Query.ResultType.EdmEquals(newQuery.ResultType),
"Query was rewritten for Span but no SpanIndex was created?");
spanInfo = rewriter.SpanIndex;
}
}
return (spanInfo != null);
}
