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");
var queryRewriter = new QueryRewriter(generatedType, context, mode);
queryRewriter.GenerateViewComponents();
// Get the basic view
var basicView = queryRewriter.BasicView;
if (m_config.IsNormalTracing)
{
Helpers.StringTrace("Basic View: ");
Helpers.StringTraceLine(basicView.ToString());
}
var simplifiedView = GenerateSimplifiedView(basicView, queryRewriter.UsedCells);
if (m_config.IsNormalTracing)
{
Helpers.StringTraceLine(String.Empty);
Helpers.StringTrace("Simplified View: ");
Helpers.StringTraceLine(simplifiedView.ToString());
}
var 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();
}
var generatedView = GeneratedView.CreateGeneratedView(
context.Extent, generatedType, commandTree, eSQLView, m_entityContainerMapping.StorageMappingItemCollection, m_config);
views.Add(context.Extent, generatedView);
return(queryRewriter);
}
internal DbQueryCommandTree GetCommandTree()
{
Exception parserException;
if (this.m_commandTree == null && !GeneratedView.TryParseView(this.m_eSQL, false, this.m_extent, this.m_mappingItemCollection, this.m_config, out this.m_commandTree, out this.m_discriminatorMap, out parserException))
{
throw new MappingException(Strings.Mapping_Invalid_QueryView((object)this.m_extent.Name, (object)parserException.Message));
}
return(this.m_commandTree);
}
internal static bool TryParseUserSpecifiedView(
EntitySetBaseMapping setMapping,
EntityTypeBase type,
string eSQL,
bool includeSubtypes,
StorageMappingItemCollection mappingItemCollection,
ConfigViewGenerator config,
IList <EdmSchemaError> errors,
out GeneratedView generatedView)
{
bool flag = false;
DbQueryCommandTree commandTree;
DiscriminatorMap discriminatorMap;
Exception parserException;
if (!GeneratedView.TryParseView(eSQL, true, setMapping.Set, mappingItemCollection, config, out commandTree, out discriminatorMap, out parserException))
{
EdmSchemaError edmSchemaError = new EdmSchemaError(Strings.Mapping_Invalid_QueryView2((object)setMapping.Set.Name, (object)parserException.Message), 2068, EdmSchemaErrorSeverity.Error, setMapping.EntityContainerMapping.SourceLocation, setMapping.StartLineNumber, setMapping.StartLinePosition, parserException);
errors.Add(edmSchemaError);
flag = true;
}
else
{
foreach (EdmSchemaError edmSchemaError in ViewValidator.ValidateQueryView(commandTree, setMapping, type, includeSubtypes))
{
errors.Add(edmSchemaError);
flag = true;
}
CollectionType edmType = commandTree.Query.ResultType.EdmType as CollectionType;
if (edmType == null || !setMapping.Set.ElementType.IsAssignableFrom(edmType.TypeUsage.EdmType))
{
EdmSchemaError edmSchemaError = new EdmSchemaError(Strings.Mapping_Invalid_QueryView_Type((object)setMapping.Set.Name), 2069, EdmSchemaErrorSeverity.Error, setMapping.EntityContainerMapping.SourceLocation, setMapping.StartLineNumber, setMapping.StartLinePosition);
errors.Add(edmSchemaError);
flag = true;
}
}
if (!flag)
{
generatedView = new GeneratedView(setMapping.Set, (EdmType)type, commandTree, eSQL, discriminatorMap, mappingItemCollection, config);
return(true);
}
generatedView = (GeneratedView)null;
return(false);
}
private QueryRewriter GenerateViewsForExtentAndType(
EdmType generatedType,
ViewgenContext context,
CqlIdentifiers identifiers,
KeyToListMap <EntitySetBase, GeneratedView> views,
ViewGenMode mode)
{
QueryRewriter queryRewriter = new QueryRewriter(generatedType, context, mode);
queryRewriter.GenerateViewComponents();
CellTreeNode basicView = queryRewriter.BasicView;
if (this.m_config.IsNormalTracing)
{
Helpers.StringTrace("Basic View: ");
Helpers.StringTraceLine(basicView.ToString());
}
CellTreeNode simplifiedView = ViewGenerator.GenerateSimplifiedView(basicView, queryRewriter.UsedCells);
if (this.m_config.IsNormalTracing)
{
Helpers.StringTraceLine(string.Empty);
Helpers.StringTrace("Simplified View: ");
Helpers.StringTraceLine(simplifiedView.ToString());
}
CqlGenerator cqlGenerator = new CqlGenerator(simplifiedView, queryRewriter.CaseStatements, identifiers, context.MemberMaps.ProjectedSlotMap, queryRewriter.UsedCells.Count, queryRewriter.TopLevelWhereClause, this.m_entityContainerMapping.StorageMappingItemCollection);
string eSQL;
DbQueryCommandTree commandTree;
if (this.m_config.GenerateEsql)
{
eSQL = cqlGenerator.GenerateEsql();
commandTree = (DbQueryCommandTree)null;
}
else
{
eSQL = (string)null;
commandTree = cqlGenerator.GenerateCqt();
}
GeneratedView generatedView = GeneratedView.CreateGeneratedView(context.Extent, generatedType, commandTree, eSQL, this.m_entityContainerMapping.StorageMappingItemCollection, this.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(
EntitySetBaseMapping setMapping,
EntityTypeBase type,
string eSQL,
bool includeSubtypes,
StorageMappingItemCollection mappingItemCollection,
ConfigViewGenerator config,
/*out*/ IList <EdmSchemaError> errors,
out GeneratedView generatedView)
{
var failed = false;
DbQueryCommandTree commandTree;
DiscriminatorMap discriminatorMap;
Exception parserException;
if (
!TryParseView(
eSQL, true, setMapping.Set, mappingItemCollection, config, out commandTree, out discriminatorMap, out parserException))
{
var error = new EdmSchemaError(
Strings.Mapping_Invalid_QueryView2(setMapping.Set.Name, parserException.Message),
(int)MappingErrorCode.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
var queryResultType = (commandTree.Query.ResultType.EdmType) as CollectionType;
if ((queryResultType == null) ||
(!setMapping.Set.ElementType.IsAssignableFrom(queryResultType.TypeUsage.EdmType)))
{
var error = new EdmSchemaError(
Strings.Mapping_Invalid_QueryView_Type(setMapping.Set.Name),
(int)MappingErrorCode.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(
EntitySetBase entity, EntityTypeBase type, bool includeSubtypes, out GeneratedView generatedView)
{
var key = new OfTypeQVCacheKey(entity, new Pair<EntityTypeBase, bool>(type, includeSubtypes));
generatedView = _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)
{
DebugCheck.NotNull(entityContainer);
DebugCheck.NotNull(entity);
DebugCheck.NotNull(type);
if (type.Abstract)
{
generatedView = null;
return false;
}
//Get the mapping that has the entity container mapped.
var entityContainerMap = MappingMetadataHelper.GetEntityContainerMap(_storageMappingItemCollection, entityContainer);
Debug.Assert(!entityContainerMap.IsEmpty, "There are no entity set maps");
bool success;
var viewGenResults = ViewgenGatekeeper.GenerateTypeSpecificQueryView(
entityContainerMap, _config, entity, type, includeSubtypes, out success);
if (!success)
{
generatedView = null;
return false; //could not generate view
}
var 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>
internal bool TryGetGeneratedViewOfType(
EntitySetBase entity, EntityTypeBase type, bool includeSubtypes, out GeneratedView generatedView)
{
return m_viewDictionary.TryGetGeneratedViewOfType(entity, type, includeSubtypes, out generatedView);
}
/// <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)
{
var failed = false;
DbQueryCommandTree commandTree;
DiscriminatorMap discriminatorMap;
Exception parserException;
if (
!TryParseView(
eSQL, true, setMapping.Set, mappingItemCollection, config, out commandTree, out discriminatorMap, out parserException))
{
var error = new EdmSchemaError(
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
var queryResultType = (commandTree.Query.ResultType.EdmType) as CollectionType;
if ((queryResultType == null)
|| (!setMapping.Set.ElementType.IsAssignableFrom(queryResultType.TypeUsage.EdmType)))
{
var error = new EdmSchemaError(
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;
}
}
