106 lines
4.5 KiB
C#
106 lines
4.5 KiB
C#
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//---------------------------------------------------------------------
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// <copyright file="ValidationHelper.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//
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// @owner [....]
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// @backupOwner [....]
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//---------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Data.EntityModel.SchemaObjectModel;
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using System.Data.Metadata.Edm;
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using System.Data.Entity;
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using System.Diagnostics;
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namespace System.Data.EntityModel.SchemaObjectModel
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{
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/// <summary>
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/// Helper methods used for Schema Object Model (validation) validation.
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/// </summary>
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internal static class ValidationHelper
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{
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/// <summary>
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/// Validates whether facets are declared correctly.
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/// </summary>
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/// <param name="element">Schema element being validated. Must not be null.</param>
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/// <param name="type">Resolved type (from declaration on the element). Possibly null.</param>
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/// <param name="typeUsageBuilder">TypeUsageBuilder for the current element. Must not be null.</param>
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internal static void ValidateFacets(SchemaElement element, SchemaType type, TypeUsageBuilder typeUsageBuilder)
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{
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Debug.Assert(element != null);
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Debug.Assert(typeUsageBuilder != null);
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if (type != null)
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{
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var schemaEnumType = type as SchemaEnumType;
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if (schemaEnumType != null)
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{
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typeUsageBuilder.ValidateEnumFacets(schemaEnumType);
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}
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else if(!(type is ScalarType) && typeUsageBuilder.HasUserDefinedFacets)
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{
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Debug.Assert(!(type is SchemaEnumType), "Note that enums should have already been handled.");
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// Non-scalar type should not have Facets.
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element.AddError(ErrorCode.FacetOnNonScalarType, EdmSchemaErrorSeverity.Error, Strings.FacetsOnNonScalarType(type.FQName));
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}
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}
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else
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{
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if(typeUsageBuilder.HasUserDefinedFacets)
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{
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// Type attribute not specified but facets exist.
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element.AddError(ErrorCode.IncorrectlyPlacedFacet, EdmSchemaErrorSeverity.Error, Strings.FacetDeclarationRequiresTypeAttribute);
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}
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}
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}
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/// <summary>
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/// Validated whether a type is declared correctly.
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/// </summary>
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/// <param name="element">Schema element being validated. Must not be null.</param>
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/// <param name="type">Resolved type (from declaration on the element). Possibly null.</param>
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/// <param name="typeSubElement">Child schema element. Possibly null.</param>
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/// <remarks>
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/// For some elements (e.g. ReturnType) we allow the type to be defined inline in an attribute on the element itself or
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/// by using nested elements. These definitions are mutually exclusive.
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/// </remarks>
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internal static void ValidateTypeDeclaration(SchemaElement element, SchemaType type, SchemaElement typeSubElement)
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{
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Debug.Assert(element != null);
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if (type == null && typeSubElement == null)
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{
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//Type not declared as either attribute or subelement
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element.AddError(ErrorCode.TypeNotDeclared, EdmSchemaErrorSeverity.Error, Strings.TypeMustBeDeclared);
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}
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if (type != null && typeSubElement != null)
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{
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//Both attribute and sub-element declarations exist
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element.AddError(ErrorCode.TypeDeclaredAsAttributeAndElement, EdmSchemaErrorSeverity.Error, Strings.TypeDeclaredAsAttributeAndElement);
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}
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}
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/// <summary>
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/// Validate that reference type is an entity type.
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/// </summary>
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/// <param name="element">Schema element being validated. Must not be null.</param>
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/// <param name="type">Resolved type (from declaration on the element). Possibly null.</param>
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internal static void ValidateRefType(SchemaElement element, SchemaType type)
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{
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Debug.Assert(element != null);
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if (type != null && !(type is SchemaEntityType))
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{
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// Ref type refers to non entity type.
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element.AddError(ErrorCode.ReferenceToNonEntityType, EdmSchemaErrorSeverity.Error, Strings.ReferenceToNonEntityType(type.FQName));
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}
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}
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}
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}
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