internal ViewgenContext(
ViewTarget viewTarget, EntitySetBase extent, IList<Cell> extentCells,
CqlIdentifiers identifiers, ConfigViewGenerator config, MemberDomainMap queryDomainMap,
MemberDomainMap updateDomainMap, EntityContainerMapping entityContainerMapping)
{
foreach (var cell in extentCells)
{
Debug.Assert(extent.Equals(cell.GetLeftQuery(viewTarget).Extent));
Debug.Assert(cell.CQuery.NumProjectedSlots == cell.SQuery.NumProjectedSlots);
}
m_extent = extent;
m_viewTarget = viewTarget;
m_config = config;
m_edmItemCollection = entityContainerMapping.StorageMappingItemCollection.EdmItemCollection;
m_entityContainerMapping = entityContainerMapping;
m_identifiers = identifiers;
// create a copy of updateDomainMap so generation of query views later on is not affected
// it is modified in QueryRewriter.AdjustMemberDomainsForUpdateViews
updateDomainMap = updateDomainMap.MakeCopy();
// Create a signature generator that handles all the
// multiconstant work and generating the signatures
var domainMap = viewTarget == ViewTarget.QueryView ? queryDomainMap : updateDomainMap;
m_memberMaps = new MemberMaps(
viewTarget, MemberProjectionIndex.Create(extent, m_edmItemCollection), queryDomainMap, updateDomainMap);
// Create left fragment KB: includes constraints for the extent to be constructed
var leftKB = new FragmentQueryKBChaseSupport();
leftKB.CreateVariableConstraints(extent, domainMap, m_edmItemCollection);
m_leftFragmentQP = new FragmentQueryProcessor(leftKB);
m_rewritingCache = new Dictionary<FragmentQuery, Tile<FragmentQuery>>(
FragmentQuery.GetEqualityComparer(m_leftFragmentQP));
// Now using the signatures, create new cells such that
// "extent's" query (C or S) is described in terms of multiconstants
if (!CreateLeftCellWrappers(extentCells, viewTarget))
{
return;
}
// Create right fragment KB: includes constraints for all extents and association roles of right queries
var rightKB = new FragmentQueryKBChaseSupport();
var rightDomainMap = viewTarget == ViewTarget.QueryView ? updateDomainMap : queryDomainMap;
foreach (var leftCellWrapper in m_cellWrappers)
{
var rightExtent = leftCellWrapper.RightExtent;
rightKB.CreateVariableConstraints(rightExtent, rightDomainMap, m_edmItemCollection);
rightKB.CreateAssociationConstraints(rightExtent, rightDomainMap, m_edmItemCollection);
}
if (m_viewTarget == ViewTarget.UpdateView)
{
CreateConstraintsForForeignKeyAssociationsAffectingThisWrapper(rightKB, rightDomainMap);
}
m_rightFragmentQP = new FragmentQueryProcessor(rightKB);
// Check for concurrency control tokens
if (m_viewTarget == ViewTarget.QueryView)
{
CheckConcurrencyControlTokens();
}
// For backward compatibility -
// order wrappers by increasing domain size, decreasing number of attributes
m_cellWrappers.Sort(LeftCellWrapper.Comparer);
}
