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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / EntityModel / SchemaObjectModel / NavigationProperty.cs / 1305376 / NavigationProperty.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Xml; using System.Data; using System.Data.Metadata.Edm; using System.Diagnostics; using System.Globalization; namespace System.Data.EntityModel.SchemaObjectModel { ////// Summary description for Association. /// [System.Diagnostics.DebuggerDisplay("Name={Name}, Relationship={_unresolvedRelationshipName}, FromRole={_unresolvedFromEndRole}, ToRole={_unresolvedToEndRole}")] internal sealed class NavigationProperty : Property { private string _unresolvedFromEndRole = null; private string _unresolvedToEndRole = null; private string _unresolvedRelationshipName = null; private IRelationshipEnd _fromEnd = null; private IRelationshipEnd _toEnd = null; private IRelationship _relationship = null; ////// /// /// public NavigationProperty(SchemaEntityType parent) : base(parent) { } ////// /// public new SchemaEntityType ParentElement { get { return base.ParentElement as SchemaEntityType; } } internal IRelationship Relationship { get { return _relationship; } } internal IRelationshipEnd ToEnd { get { return _toEnd; } } internal IRelationshipEnd FromEnd { get { return _fromEnd; } } ////// Gets the Type of the property /// public override SchemaType Type { get { if (_toEnd == null || _toEnd.Type == null) { return null; } return _toEnd.Type; } } protected override bool HandleAttribute(XmlReader reader) { if (base.HandleAttribute(reader)) { return true; } else if (CanHandleAttribute(reader, XmlConstants.Relationship)) { HandleAssociationAttribute(reader); return true; } else if (CanHandleAttribute(reader, XmlConstants.FromRole)) { HandleFromRoleAttribute(reader); return true; } else if (CanHandleAttribute(reader, XmlConstants.ToRole)) { HandleToRoleAttribute(reader); return true; } return false; } ////// /// internal override void ResolveTopLevelNames() { base.ResolveTopLevelNames(); SchemaType element; if (!Schema.ResolveTypeName(this, _unresolvedRelationshipName, out element)) return; _relationship = element as IRelationship; if (_relationship == null) { AddError(ErrorCode.BadNavigationProperty, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.BadNavigationPropertyRelationshipNotRelationship(_unresolvedRelationshipName)); return; } bool foundBothEnds = true; if (!_relationship.TryGetEnd(_unresolvedFromEndRole, out _fromEnd)) { AddError(ErrorCode.BadNavigationProperty, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.BadNavigationPropertyUndefinedRole(_unresolvedFromEndRole, _relationship.FQName)); foundBothEnds = false; } if (!_relationship.TryGetEnd(_unresolvedToEndRole, out _toEnd)) { AddError(ErrorCode.BadNavigationProperty, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.BadNavigationPropertyUndefinedRole(_unresolvedToEndRole, _relationship.FQName)); foundBothEnds = false; } if (foundBothEnds && _fromEnd == _toEnd) { AddError(ErrorCode.BadNavigationProperty, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.BadNavigationPropertyRolesCannotBeTheSame); } } ////// /// internal override void Validate() { base.Validate(); System.Diagnostics.Debug.Assert(_fromEnd != null && _toEnd != null, "FromEnd and ToEnd must not be null in Validate. ResolveNames must have resolved it or added error"); if (_fromEnd.Type != ParentElement) { AddError(ErrorCode.BadNavigationProperty, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.BadNavigationPropertyBadFromRoleType(this.Name, _fromEnd.Type.FQName, _fromEnd.Name, _relationship.FQName, ParentElement.FQName)); } StructuredType type = _toEnd.Type; } #region Private Methods ////// /// /// private void HandleToRoleAttribute(XmlReader reader) { _unresolvedToEndRole = HandleUndottedNameAttribute(reader, _unresolvedToEndRole); } ////// /// /// private void HandleFromRoleAttribute(XmlReader reader) { _unresolvedFromEndRole = HandleUndottedNameAttribute(reader, _unresolvedFromEndRole); } ////// /// /// private void HandleAssociationAttribute(XmlReader reader) { Debug.Assert(_unresolvedRelationshipName == null, string.Format(CultureInfo.CurrentCulture, "{0} is already defined", reader.Name)); string association; if (!Utils.GetDottedName(this.Schema, reader, out association)) return; _unresolvedRelationshipName = association; } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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