/// <summary>
/// Creates generated view object for the combination of the <paramref name="setMapping"/>.Set and the <paramref name="type"/>.
/// This constructor is used for user-defined query views only.
/// </summary>
internal static bool TryParseUserSpecifiedView(StorageSetMapping setMapping,
EntityTypeBase type,
string eSQL,
bool includeSubtypes,
StorageMappingItemCollection mappingItemCollection,
ConfigViewGenerator config,
/*out*/ IList <EdmSchemaError> errors,
out GeneratedView generatedView)
{
bool failed = false;
DbQueryCommandTree commandTree;
DiscriminatorMap discriminatorMap;
Exception parserException;
if (!GeneratedView.TryParseView(eSQL, true, setMapping.Set, mappingItemCollection, config, out commandTree, out discriminatorMap, out parserException))
{
EdmSchemaError error = new EdmSchemaError(System.Data.Entity.Strings.Mapping_Invalid_QueryView2(setMapping.Set.Name, parserException.Message),
(int)StorageMappingErrorCode.InvalidQueryView, EdmSchemaErrorSeverity.Error,
setMapping.EntityContainerMapping.SourceLocation, setMapping.StartLineNumber, setMapping.StartLinePosition, parserException);
errors.Add(error);
failed = true;
}
else
{
Debug.Assert(commandTree != null, "commandTree not set after parsing the view");
// Verify that all expressions appearing in the view are supported.
foreach (var error in ViewValidator.ValidateQueryView(commandTree, setMapping, type, includeSubtypes))
{
errors.Add(error);
failed = true;
}
// Verify that the result type of the query view is assignable to the element type of the entityset
CollectionType queryResultType = (commandTree.Query.ResultType.EdmType) as CollectionType;
if ((queryResultType == null) || (!setMapping.Set.ElementType.IsAssignableFrom(queryResultType.TypeUsage.EdmType)))
{
EdmSchemaError error = new EdmSchemaError(System.Data.Entity.Strings.Mapping_Invalid_QueryView_Type(setMapping.Set.Name),
(int)StorageMappingErrorCode.InvalidQueryViewResultType, EdmSchemaErrorSeverity.Error,
setMapping.EntityContainerMapping.SourceLocation, setMapping.StartLineNumber, setMapping.StartLinePosition);
errors.Add(error);
failed = true;
}
}
if (!failed)
{
generatedView = new GeneratedView(setMapping.Set, type, commandTree, eSQL, discriminatorMap, mappingItemCollection, config);
return(true);
}
else
{
generatedView = null;
return(false);
}
}
private QueryRewriter GenerateViewsForExtentAndType(EdmType generatedType, ViewgenContext context, CqlIdentifiers identifiers, ViewSet views, ViewGenMode mode)
{
Debug.Assert(mode != ViewGenMode.GenerateAllViews, "By definition this method can not handle generating views for all extents");
QueryRewriter queryRewriter = new QueryRewriter(generatedType, context, mode);
queryRewriter.GenerateViewComponents();
// Get the basic view
CellTreeNode basicView = queryRewriter.BasicView;
if (m_config.IsNormalTracing)
{
Helpers.StringTrace("Basic View: ");
Helpers.StringTraceLine(basicView.ToString());
}
CellTreeNode simplifiedView = GenerateSimplifiedView(basicView, queryRewriter.UsedCells);
if (m_config.IsNormalTracing)
{
Helpers.StringTraceLine(String.Empty);
Helpers.StringTrace("Simplified View: ");
Helpers.StringTraceLine(simplifiedView.ToString());
}
CqlGenerator cqlGen = new CqlGenerator(simplifiedView,
queryRewriter.CaseStatements,
identifiers,
context.MemberMaps.ProjectedSlotMap,
queryRewriter.UsedCells.Count,
queryRewriter.TopLevelWhereClause,
m_entityContainerMapping.StorageMappingItemCollection);
string eSQLView;
DbQueryCommandTree commandTree;
if (m_config.GenerateEsql)
{
eSQLView = cqlGen.GenerateEsql();
commandTree = null;
}
else
{
eSQLView = null;
commandTree = cqlGen.GenerateCqt();
}
GeneratedView generatedView = GeneratedView.CreateGeneratedView(context.Extent, generatedType, commandTree, eSQLView, m_entityContainerMapping.StorageMappingItemCollection, m_config);
views.Add(context.Extent, generatedView);
return(queryRewriter);
}
/// <summary>
/// Creates generated view object for the combination of the <paramref name="setMapping"/>.Set and the <paramref name="type"/>.
/// This constructor is used for user-defined query views only.
/// </summary>
internal static bool TryParseUserSpecifiedView(StorageSetMapping setMapping,
EntityTypeBase type,
string eSQL,
bool includeSubtypes,
StorageMappingItemCollection mappingItemCollection,
ConfigViewGenerator config,
/*out*/ IList<EdmSchemaError> errors,
out GeneratedView generatedView)
{
bool failed = false;
DbQueryCommandTree commandTree;
DiscriminatorMap discriminatorMap;
Exception parserException;
if (!GeneratedView.TryParseView(eSQL, true, setMapping.Set, mappingItemCollection, config, out commandTree, out discriminatorMap, out parserException))
{
EdmSchemaError error = new EdmSchemaError(System.Data.Entity.Strings.Mapping_Invalid_QueryView2(setMapping.Set.Name, parserException.Message),
(int)StorageMappingErrorCode.InvalidQueryView, EdmSchemaErrorSeverity.Error,
setMapping.EntityContainerMapping.SourceLocation, setMapping.StartLineNumber, setMapping.StartLinePosition, parserException);
errors.Add(error);
failed = true;
}
else
{
Debug.Assert(commandTree != null, "commandTree not set after parsing the view");
// Verify that all expressions appearing in the view are supported.
foreach (var error in ViewValidator.ValidateQueryView(commandTree, setMapping, type, includeSubtypes))
{
errors.Add(error);
failed = true;
}
// Verify that the result type of the query view is assignable to the element type of the entityset
CollectionType queryResultType = (commandTree.Query.ResultType.EdmType) as CollectionType;
if ((queryResultType == null) || (!setMapping.Set.ElementType.IsAssignableFrom(queryResultType.TypeUsage.EdmType)))
{
EdmSchemaError error = new EdmSchemaError(System.Data.Entity.Strings.Mapping_Invalid_QueryView_Type(setMapping.Set.Name),
(int)StorageMappingErrorCode.InvalidQueryViewResultType, EdmSchemaErrorSeverity.Error,
setMapping.EntityContainerMapping.SourceLocation, setMapping.StartLineNumber, setMapping.StartLinePosition);
errors.Add(error);
failed = true;
}
}
if (!failed)
{
generatedView = new GeneratedView(setMapping.Set, type, commandTree, eSQL, discriminatorMap, mappingItemCollection, config);
return true;
}
else
{
generatedView = null;
return false;
}
}
/// <summary>
/// Tries to generate the Oftype or OfTypeOnly query view for a given entity set and type.
/// Returns false if the view could not be generated.
/// Possible reasons for failing are
/// 1) Passing in OfTypeOnly on an abstract type
/// 2) In user-specified query views mode a query for the given type is absent
/// </summary>
internal bool TryGetGeneratedViewOfType(MetadataWorkspace workspace, EntitySetBase entity, EntityTypeBase type, bool includeSubtypes, out GeneratedView generatedView)
{
OfTypeQVCacheKey key = new OfTypeQVCacheKey(entity, new Pair<EntityTypeBase, bool>(type, includeSubtypes));
generatedView = this.m_generatedViewOfTypeMemoizer.Evaluate(key);
return (generatedView != null);
}
/// <summary>
/// Generates a single query view for a given Extent and type. It is used to generate OfType and OfTypeOnly views.
/// </summary>
/// <param name="includeSubtypes">Whether the view should include extents that are subtypes of the given entity</param>
private bool TryGenerateQueryViewOfType(EntityContainer entityContainer, EntitySetBase entity, EntityTypeBase type, bool includeSubtypes, out GeneratedView generatedView)
{
Debug.Assert(entityContainer != null);
Debug.Assert(entity != null);
Debug.Assert(type != null);
if (type.Abstract)
{
generatedView = null;
return false;
}
//Get the mapping that has the entity container mapped.
StorageEntityContainerMapping entityContainerMap = MappingMetadataHelper.GetEntityContainerMap(m_storageMappingItemCollection, entityContainer);
Debug.Assert(!entityContainerMap.IsEmpty, "There are no entity set maps");
bool success;
ViewGenResults viewGenResults = ViewgenGatekeeper.GenerateTypeSpecificQueryView(entityContainerMap, m_config, entity, type, includeSubtypes, out success);
if (!success)
{
generatedView = null;
return false; //could not generate view
}
KeyToListMap<EntitySetBase, GeneratedView> extentMappingViews = viewGenResults.Views;
if (viewGenResults.HasErrors)
{
throw new MappingException(Helper.CombineErrorMessage(viewGenResults.Errors));
}
Debug.Assert(extentMappingViews.AllValues.Count() == 1, "Viewgen should have produced only one view");
generatedView = extentMappingViews.AllValues.First();
return true;
}
/// <summary>
/// this method will be called in metadatworkspace, the signature is the same as the one in ViewDictionary
/// </summary>
/// <param name="workspace"></param>
/// <param name="entity"></param>
/// <param name="type"></param>
/// <param name="includeSubtypes"></param>
/// <param name="generatedView"></param>
/// <returns></returns>
internal bool TryGetGeneratedViewOfType(MetadataWorkspace workspace, EntitySetBase entity, EntityTypeBase type, bool includeSubtypes, out GeneratedView generatedView)
{
return this.m_viewDictionary.TryGetGeneratedViewOfType(workspace, entity, type, includeSubtypes, out generatedView);
}
/// <summary>
/// Tries to generate the Oftype or OfTypeOnly query view for a given entity set and type.
/// Returns false if the view could not be generated.
/// Possible reasons for failing are
/// 1) Passing in OfTypeOnly on an abstract type
/// 2) In user-specified query views mode a query for the given type is absent
/// </summary>
internal bool TryGetGeneratedViewOfType(
EntitySetBase entity, EntityTypeBase type, bool includeSubtypes, out GeneratedView generatedView)
{
var key = new OfTypeQVCacheKey(entity, new Pair<EntityTypeBase, bool>(type, includeSubtypes));
generatedView = m_generatedViewOfTypeMemoizer.Evaluate(key);
return (generatedView != null);
}
/// <summary>
/// this method will be called in metadatworkspace, the signature is the same as the one in ViewDictionary
/// </summary>
/// <param name="entity"></param>
/// <param name="type"></param>
/// <param name="includeSubtypes"></param>
/// <param name="generatedView"></param>
/// <returns></returns>
internal bool TryGetGeneratedViewOfType(
EntitySetBase entity, EntityTypeBase type, bool includeSubtypes, out GeneratedView generatedView)
{
return m_viewDictionary.TryGetGeneratedViewOfType(entity, type, includeSubtypes, out generatedView);
}
