/// <summary>
/// Sets the inner node of the graph instance.
/// </summary>
/// <param name="context">A semantic context.</param>
/// <param name="innerNode">The inner node.</param>
protected void SetInnerNode(SemqContext context, DbNode innerNode)
{
if (context == null)
{
throw new QueryTalkException(this, QueryTalkExceptionType.NullArgumentInnerException,
"context = null", "DbGraphBase.SetInnerNode");
}
_innerNode = innerNode;
context.SetGraphIndex(_innerNode);
}
/// <summary>
/// Returns the inner node of the graph instance.
/// </summary>
/// <param name="context">A semantic context.</param>
protected DbNode GetInnerNode(SemqContext context)
{
if (context == null)
{
throw new QueryTalkException(this, QueryTalkExceptionType.NullArgumentInnerException,
"context = null", "DbGraphBase.GetInnerNode");
}
if (_innerNode != null)
{
return(_innerNode);
}
else
{
var innerNode = InnerGraph.Subject;
context.SetGraphIndex(innerNode);
return(innerNode);
}
}
internal static void TranslateGraphNode(IGraph graph, SemqContext context, DbNode predecessor, DbNode node, bool isLeafNode = false)
{
var isSubject = (predecessor == null);
node = node.Root;
context.SetGraphIndex(node);
Chainer translatedNode;
Designer root;
if (isSubject)
{
root = new InternalRoot(node);
}
else
{
root = context.TranslatedGraph.GetRoot();
node.IsFinalizeable = false;
}
// translate node only
// important:
// The node should be translated before the graph processing begins in order that to obtain the appropriate index.
translatedNode = ((ISemantic)node).Translate(context, predecessor);
StringBuilder nodeTableVar = null;
// create table variable storage except for the last leaf node which does not need a table variable
if (!isLeafNode)
{
TranslateGraphDeclareTable(node, root, out nodeTableVar);
}
// finish the node query translation as part of a graph
if (isSubject)
{
TranslateGraphSubject(context, node, root, translatedNode, nodeTableVar);
}
else
{
TranslateGraphRelated(graph, context, predecessor, node, translatedNode, nodeTableVar);
}
}