Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / ndp / fx / src / DataEntity / System / Data / Mapping / ViewValidator.cs / 2 / ViewValidator.cs
//----------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//
// @owner [....], [....]
//---------------------------------------------------------------------
using System.Data.Metadata.Edm;
using System.Globalization;
using System.Data.Common.CommandTrees;
using System.Collections.Generic;
using System.Diagnostics;
using System.Data.Entity;
namespace System.Data.Mapping
{
///
/// Verifies that only legal expressions exist in a user-defined query mapping view.
///
/// - ViewExpr = (see ViewExpressionValidator)
/// Project(Projection, ViewExpr) |
/// Project(Value, ViewExpr) |
/// Filter(ViewExpr, ViewExpr) |
/// Join(ViewExpr, ViewExpr, ViewExpr) |
/// UnionAll(ViewExpr, ViewExpr) |
/// Scan(S-Space EntitySet)
/// Constant |
/// Property{StructuralProperty}(ViewExpr) |
/// Null |
/// VariableReference |
/// Cast(ViewExpr) |
/// Case([Predicate, ViewExpr]*, ViewExpr) |
/// Comparison(ViewExpr, ViewExpr) |
/// Not(ViewExpr) |
/// And(ViewExpr, ViewExpr) |
/// Or(ViewExpr, ViewExpr) |
/// IsNull(ViewExpr)
/// - Projection = (see ViewExpressionValidator.Visit(DbProjectExpression)
/// NewInstance{TargetEntity}(ViewExpr*) |
/// NewInstance{Row}(ViewExpr*)
///
internal static class ViewValidator
{
///
/// Determines whether the given view is valid.
///
/// Query view to validate.
/// Store item collection.
/// Mapping in which view is declared.
/// Errors in view definition.
internal static IEnumerable ValidateQueryView(DbQueryCommandTree view, StoreItemCollection storeItemCollection, StorageSetMapping setMapping, EntityTypeBase elementType, bool includeSubtypes)
{
ViewExpressionValidator validator = new ViewExpressionValidator(storeItemCollection, setMapping, elementType, includeSubtypes);
validator.VisitExpression(view.Query);
return validator.Errors;
}
private sealed class ViewExpressionValidator : BasicExpressionVisitor
{
private readonly StorageSetMapping _setMapping;
private readonly StoreItemCollection _storeItemCollection;
private readonly List _errors;
private readonly EntityTypeBase _elementType;
private readonly bool _includeSubtypes;
internal ViewExpressionValidator(StoreItemCollection storeItemCollection, StorageSetMapping setMapping, EntityTypeBase elementType, bool includeSubtypes)
{
Debug.Assert(null != setMapping);
Debug.Assert(null != storeItemCollection);
_setMapping = setMapping;
_storeItemCollection = storeItemCollection;
_errors = new List();
_elementType = elementType;
_includeSubtypes = includeSubtypes;
}
internal IEnumerable Errors { get { return _errors; } }
public override void VisitExpression(DbExpression expression)
{
if (null != expression)
{
ValidateExpressionKind(expression.ExpressionKind);
}
base.VisitExpression(expression);
}
private void ValidateExpressionKind(DbExpressionKind expressionKind)
{
switch (expressionKind)
{
// Supported expression kinds
case DbExpressionKind.Constant:
case DbExpressionKind.Property:
case DbExpressionKind.Null:
case DbExpressionKind.VariableReference:
case DbExpressionKind.Cast:
case DbExpressionKind.Case:
case DbExpressionKind.Not:
case DbExpressionKind.Or:
case DbExpressionKind.And:
case DbExpressionKind.IsNull:
case DbExpressionKind.Equals:
case DbExpressionKind.NotEquals:
case DbExpressionKind.LessThan:
case DbExpressionKind.LessThanOrEquals:
case DbExpressionKind.GreaterThan:
case DbExpressionKind.GreaterThanOrEquals:
case DbExpressionKind.Project:
case DbExpressionKind.NewInstance:
case DbExpressionKind.Filter:
case DbExpressionKind.Ref:
case DbExpressionKind.UnionAll:
case DbExpressionKind.Scan:
case DbExpressionKind.FullOuterJoin:
case DbExpressionKind.LeftOuterJoin:
case DbExpressionKind.InnerJoin:
case DbExpressionKind.EntityRef:
break;
default:
string elementString = (_includeSubtypes)?"IsTypeOf("+_elementType.ToString()+")":_elementType.ToString();
_errors.Add(new EdmSchemaError(System.Data.Entity.Strings.Mapping_UnsupportedExpressionKind_QueryView_2(
_setMapping.Set.Name, elementString, expressionKind), (int)StorageMappingErrorCode.MappingUnsupportedExpressionKindQueryView,
EdmSchemaErrorSeverity.Error, _setMapping.EntityContainerMapping.SourceLocation, _setMapping.StartLineNumber,
_setMapping.StartLinePosition));
break;
}
}
public override void Visit(DbPropertyExpression expression)
{
base.Visit(expression);
if (expression.Property.BuiltInTypeKind != BuiltInTypeKind.EdmProperty)
{
_errors.Add(new EdmSchemaError(System.Data.Entity.Strings.Mapping_UnsupportedPropertyKind_QueryView_3(
_setMapping.Set.Name, expression.Property.Name, expression.Property.BuiltInTypeKind), (int)StorageMappingErrorCode.MappingUnsupportedPropertyKindQueryView,
EdmSchemaErrorSeverity.Error, _setMapping.EntityContainerMapping.SourceLocation, _setMapping.StartLineNumber,
_setMapping.StartLinePosition));
}
}
public override void Visit(DbNewInstanceExpression expression)
{
base.Visit(expression);
EdmType type = expression.ResultType.EdmType;
if (type.BuiltInTypeKind != BuiltInTypeKind.RowType)
{
// restrict initialization of non-row types to the target of the view
if (!_setMapping.Set.ElementType.IsAssignableFrom(type))
{
_errors.Add(new EdmSchemaError(System.Data.Entity.Strings.Mapping_UnsupportedInitialization_QueryView_2(
_setMapping.Set.Name, type.FullName), (int)StorageMappingErrorCode.MappingUnsupportedInitializationQueryView,
EdmSchemaErrorSeverity.Error, _setMapping.EntityContainerMapping.SourceLocation, _setMapping.StartLineNumber,
_setMapping.StartLinePosition));
}
}
}
public override void Visit(DbScanExpression expression)
{
base.Visit(expression);
Debug.Assert(null != expression.Target);
// verify scan target is in S-space
EntitySetBase target = expression.Target;
EntityContainer targetContainer = target.EntityContainer;
Debug.Assert(null != target.EntityContainer);
if ((targetContainer.DataSpace != DataSpace.SSpace))
{
_errors.Add(new EdmSchemaError(System.Data.Entity.Strings.Mapping_UnsupportedScanTarget_QueryView_2(
_setMapping.Set.Name, target.Name), (int)StorageMappingErrorCode.MappingUnsupportedScanTargetQueryView,
EdmSchemaErrorSeverity.Error, _setMapping.EntityContainerMapping.SourceLocation, _setMapping.StartLineNumber,
_setMapping.StartLinePosition));
}
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//----------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//
// @owner [....], [....]
//---------------------------------------------------------------------
using System.Data.Metadata.Edm;
using System.Globalization;
using System.Data.Common.CommandTrees;
using System.Collections.Generic;
using System.Diagnostics;
using System.Data.Entity;
namespace System.Data.Mapping
{
///
/// Verifies that only legal expressions exist in a user-defined query mapping view.
///
/// - ViewExpr = (see ViewExpressionValidator)
/// Project(Projection, ViewExpr) |
/// Project(Value, ViewExpr) |
/// Filter(ViewExpr, ViewExpr) |
/// Join(ViewExpr, ViewExpr, ViewExpr) |
/// UnionAll(ViewExpr, ViewExpr) |
/// Scan(S-Space EntitySet)
/// Constant |
/// Property{StructuralProperty}(ViewExpr) |
/// Null |
/// VariableReference |
/// Cast(ViewExpr) |
/// Case([Predicate, ViewExpr]*, ViewExpr) |
/// Comparison(ViewExpr, ViewExpr) |
/// Not(ViewExpr) |
/// And(ViewExpr, ViewExpr) |
/// Or(ViewExpr, ViewExpr) |
/// IsNull(ViewExpr)
/// - Projection = (see ViewExpressionValidator.Visit(DbProjectExpression)
/// NewInstance{TargetEntity}(ViewExpr*) |
/// NewInstance{Row}(ViewExpr*)
///
internal static class ViewValidator
{
///
/// Determines whether the given view is valid.
///
/// Query view to validate.
/// Store item collection.
/// Mapping in which view is declared.
/// Errors in view definition.
internal static IEnumerable ValidateQueryView(DbQueryCommandTree view, StoreItemCollection storeItemCollection, StorageSetMapping setMapping, EntityTypeBase elementType, bool includeSubtypes)
{
ViewExpressionValidator validator = new ViewExpressionValidator(storeItemCollection, setMapping, elementType, includeSubtypes);
validator.VisitExpression(view.Query);
return validator.Errors;
}
private sealed class ViewExpressionValidator : BasicExpressionVisitor
{
private readonly StorageSetMapping _setMapping;
private readonly StoreItemCollection _storeItemCollection;
private readonly List _errors;
private readonly EntityTypeBase _elementType;
private readonly bool _includeSubtypes;
internal ViewExpressionValidator(StoreItemCollection storeItemCollection, StorageSetMapping setMapping, EntityTypeBase elementType, bool includeSubtypes)
{
Debug.Assert(null != setMapping);
Debug.Assert(null != storeItemCollection);
_setMapping = setMapping;
_storeItemCollection = storeItemCollection;
_errors = new List();
_elementType = elementType;
_includeSubtypes = includeSubtypes;
}
internal IEnumerable Errors { get { return _errors; } }
public override void VisitExpression(DbExpression expression)
{
if (null != expression)
{
ValidateExpressionKind(expression.ExpressionKind);
}
base.VisitExpression(expression);
}
private void ValidateExpressionKind(DbExpressionKind expressionKind)
{
switch (expressionKind)
{
// Supported expression kinds
case DbExpressionKind.Constant:
case DbExpressionKind.Property:
case DbExpressionKind.Null:
case DbExpressionKind.VariableReference:
case DbExpressionKind.Cast:
case DbExpressionKind.Case:
case DbExpressionKind.Not:
case DbExpressionKind.Or:
case DbExpressionKind.And:
case DbExpressionKind.IsNull:
case DbExpressionKind.Equals:
case DbExpressionKind.NotEquals:
case DbExpressionKind.LessThan:
case DbExpressionKind.LessThanOrEquals:
case DbExpressionKind.GreaterThan:
case DbExpressionKind.GreaterThanOrEquals:
case DbExpressionKind.Project:
case DbExpressionKind.NewInstance:
case DbExpressionKind.Filter:
case DbExpressionKind.Ref:
case DbExpressionKind.UnionAll:
case DbExpressionKind.Scan:
case DbExpressionKind.FullOuterJoin:
case DbExpressionKind.LeftOuterJoin:
case DbExpressionKind.InnerJoin:
case DbExpressionKind.EntityRef:
break;
default:
string elementString = (_includeSubtypes)?"IsTypeOf("+_elementType.ToString()+")":_elementType.ToString();
_errors.Add(new EdmSchemaError(System.Data.Entity.Strings.Mapping_UnsupportedExpressionKind_QueryView_2(
_setMapping.Set.Name, elementString, expressionKind), (int)StorageMappingErrorCode.MappingUnsupportedExpressionKindQueryView,
EdmSchemaErrorSeverity.Error, _setMapping.EntityContainerMapping.SourceLocation, _setMapping.StartLineNumber,
_setMapping.StartLinePosition));
break;
}
}
public override void Visit(DbPropertyExpression expression)
{
base.Visit(expression);
if (expression.Property.BuiltInTypeKind != BuiltInTypeKind.EdmProperty)
{
_errors.Add(new EdmSchemaError(System.Data.Entity.Strings.Mapping_UnsupportedPropertyKind_QueryView_3(
_setMapping.Set.Name, expression.Property.Name, expression.Property.BuiltInTypeKind), (int)StorageMappingErrorCode.MappingUnsupportedPropertyKindQueryView,
EdmSchemaErrorSeverity.Error, _setMapping.EntityContainerMapping.SourceLocation, _setMapping.StartLineNumber,
_setMapping.StartLinePosition));
}
}
public override void Visit(DbNewInstanceExpression expression)
{
base.Visit(expression);
EdmType type = expression.ResultType.EdmType;
if (type.BuiltInTypeKind != BuiltInTypeKind.RowType)
{
// restrict initialization of non-row types to the target of the view
if (!_setMapping.Set.ElementType.IsAssignableFrom(type))
{
_errors.Add(new EdmSchemaError(System.Data.Entity.Strings.Mapping_UnsupportedInitialization_QueryView_2(
_setMapping.Set.Name, type.FullName), (int)StorageMappingErrorCode.MappingUnsupportedInitializationQueryView,
EdmSchemaErrorSeverity.Error, _setMapping.EntityContainerMapping.SourceLocation, _setMapping.StartLineNumber,
_setMapping.StartLinePosition));
}
}
}
public override void Visit(DbScanExpression expression)
{
base.Visit(expression);
Debug.Assert(null != expression.Target);
// verify scan target is in S-space
EntitySetBase target = expression.Target;
EntityContainer targetContainer = target.EntityContainer;
Debug.Assert(null != target.EntityContainer);
if ((targetContainer.DataSpace != DataSpace.SSpace))
{
_errors.Add(new EdmSchemaError(System.Data.Entity.Strings.Mapping_UnsupportedScanTarget_QueryView_2(
_setMapping.Set.Name, target.Name), (int)StorageMappingErrorCode.MappingUnsupportedScanTargetQueryView,
EdmSchemaErrorSeverity.Error, _setMapping.EntityContainerMapping.SourceLocation, _setMapping.StartLineNumber,
_setMapping.StartLinePosition));
}
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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