Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / EntityModel / SchemaObjectModel / TypeElement.cs / 1305376 / TypeElement.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Text; using System.Data.Metadata.Edm; using System.Xml; using System.Data.Common; using System.Diagnostics; namespace System.Data.EntityModel.SchemaObjectModel { ////// Responsible for parsing Type ProviderManifest /// xml elements /// internal class TypeElement : SchemaType { PrimitiveType _primitiveType = new PrimitiveType(); List_facetDescriptions = new List (); public TypeElement(Schema parent) : base(parent) { _primitiveType.NamespaceName = Schema.Namespace; } protected override bool HandleElement(XmlReader reader) { if (base.HandleElement(reader)) { return true; } else if (CanHandleElement(reader, XmlConstants.FacetDescriptionsElement)) { SkipThroughElement(reader); return true; } else if (CanHandleElement(reader, XmlConstants.PrecisionElement)) { HandlePrecisionElement(reader); return true; } else if (CanHandleElement(reader, XmlConstants.ScaleElement)) { HandleScaleElement(reader); return true; } else if (CanHandleElement(reader, XmlConstants.MaxLengthElement)) { HandleMaxLengthElement(reader); return true; } else if (CanHandleElement(reader, XmlConstants.UnicodeElement)) { HandleUnicodeElement(reader); return true; } else if (CanHandleElement(reader, XmlConstants.FixedLengthElement)) { HandleFixedLengthElement(reader); return true; } return false; } protected override bool HandleAttribute(XmlReader reader) { if (base.HandleAttribute(reader)) { return true; } else if (CanHandleAttribute(reader, XmlConstants.PrimitiveTypeKindAttribute)) { HandlePrimitiveTypeKindAttribute(reader); return true; } return false; } ///////////////////////////////////////////////////////////////////// // Element Handlers /// /// Handler for the Precision element /// /// xml reader currently positioned at Precision element private void HandlePrecisionElement(XmlReader reader) { Debug.Assert(reader != null); ByteFacetDescriptionElement facetDescription = new ByteFacetDescriptionElement(this, DbProviderManifest.PrecisionFacetName); facetDescription.Parse(reader); _facetDescriptions.Add(facetDescription); } ////// Handler for the Scale element /// /// xml reader currently positioned at Scale element private void HandleScaleElement(XmlReader reader) { Debug.Assert(reader != null); ByteFacetDescriptionElement facetDescription = new ByteFacetDescriptionElement(this, DbProviderManifest.ScaleFacetName); facetDescription.Parse(reader); _facetDescriptions.Add(facetDescription); } ////// Handler for the MaxLength element /// /// xml reader currently positioned at MaxLength element private void HandleMaxLengthElement(XmlReader reader) { Debug.Assert(reader != null); IntegerFacetDescriptionElement facetDescription = new IntegerFacetDescriptionElement(this, DbProviderManifest.MaxLengthFacetName); facetDescription.Parse(reader); _facetDescriptions.Add(facetDescription); } ////// Handler for the Unicode element /// /// xml reader currently positioned at Unicode element private void HandleUnicodeElement(XmlReader reader) { Debug.Assert(reader != null); BooleanFacetDescriptionElement facetDescription = new BooleanFacetDescriptionElement(this, DbProviderManifest.UnicodeFacetName); facetDescription.Parse(reader); _facetDescriptions.Add(facetDescription); } ////// Handler for the FixedLength element /// /// xml reader currently positioned at FixedLength element private void HandleFixedLengthElement(XmlReader reader) { Debug.Assert(reader != null); BooleanFacetDescriptionElement facetDescription = new BooleanFacetDescriptionElement(this, DbProviderManifest.FixedLengthFacetName); facetDescription.Parse(reader); _facetDescriptions.Add(facetDescription); } ///////////////////////////////////////////////////////////////////// // Attribute Handlers ////// Handler for the PrimitiveTypeKind attribute /// /// xml reader currently positioned at Version attribute private void HandlePrimitiveTypeKindAttribute(XmlReader reader) { Debug.Assert(reader != null); string value = reader.Value; try { _primitiveType.PrimitiveTypeKind = (PrimitiveTypeKind)Enum.Parse(typeof(PrimitiveTypeKind), value); _primitiveType.BaseType = MetadataItem.EdmProviderManifest.GetPrimitiveType(_primitiveType.PrimitiveTypeKind); } catch (ArgumentException) { AddError(ErrorCode.InvalidPrimitiveTypeKind, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.InvalidPrimitiveTypeKind(value)); } } public override string Name { get { return _primitiveType.Name; } set { _primitiveType.Name = value; } } public PrimitiveType PrimitiveType { get { return _primitiveType; } } public IEnumerableFacetDescriptions { get { foreach (FacetDescriptionElement element in _facetDescriptions) { yield return element.FacetDescription; } } } internal override void ResolveTopLevelNames() { base.ResolveTopLevelNames(); // Call validate on the facet descriptions foreach (FacetDescriptionElement facetDescription in _facetDescriptions) { try { facetDescription.CreateAndValidateFacetDescription(this.Name); } catch (ArgumentException e) { AddError(ErrorCode.InvalidFacetInProviderManifest, EdmSchemaErrorSeverity.Error, e.Message); } } // facet descriptions don't have any names to resolve } internal override void Validate() { base.Validate(); if (!ValidateSufficientFacets()) { // the next checks will barf, so get out // if we had errors return; } if (!ValidateInterFacetConsistency()) { return; } } private bool ValidateInterFacetConsistency() { if (PrimitiveType.PrimitiveTypeKind == PrimitiveTypeKind.Decimal) { FacetDescription precisionFacetDescription = Helper.GetFacet(FacetDescriptions, EdmProviderManifest.PrecisionFacetName); FacetDescription scaleFacetDescription = Helper.GetFacet(FacetDescriptions, EdmProviderManifest.ScaleFacetName); if(precisionFacetDescription.MaxValue.Value < scaleFacetDescription.MaxValue.Value) { AddError(ErrorCode.BadPrecisionAndScale, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.BadPrecisionAndScale( precisionFacetDescription.MaxValue.Value, scaleFacetDescription.MaxValue.Value)); return false; } } return true; } private bool ValidateSufficientFacets() { PrimitiveType baseType = _primitiveType.BaseType as PrimitiveType; // the base type will be an edm type // the edm type is the athority for which facets are required if (baseType == null) { // an error will already have been added for this return false; } bool addedErrors = false; foreach (FacetDescription systemFacetDescription in baseType.FacetDescriptions) { FacetDescription providerFacetDescription = Helper.GetFacet(FacetDescriptions, systemFacetDescription.FacetName); if (providerFacetDescription == null) { AddError(ErrorCode.RequiredFacetMissing, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.MissingFacetDescription( PrimitiveType.Name, PrimitiveType.PrimitiveTypeKind, systemFacetDescription.FacetName)); addedErrors = true; } } return !addedErrors; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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