Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / EntityModel / SchemaObjectModel / StructuredType.cs / 1305376 / StructuredType.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.Collections.Specialized; using System.Xml; using System.Data; using System.Data.Metadata.Edm; using System.Diagnostics; using System.Data.Entity; using System.Globalization; namespace System.Data.EntityModel.SchemaObjectModel { ////// Summary description for StructuredType. /// internal abstract class StructuredType : SchemaType { #region Instance Fields private bool? _baseTypeResolveResult; private string _unresolvedBaseType = null; private StructuredType _baseType = null; private bool _isAbstract = false; private SchemaElementLookUpTable_namedMembers = null; private ISchemaElementLookUpTable _properties = null; #endregion #region Static Fields private static readonly char[] NameSeparators = new char[] { '.' }; #endregion #region Public Properties /// /// /// public StructuredType BaseType { get { return _baseType; } private set { _baseType = value; } } ////// /// /// public ISchemaElementLookUpTableProperties { get { if (_properties == null) { _properties = new FilteredSchemaElementLookUpTable (NamedMembers); } return _properties; } } /// /// /// /// protected SchemaElementLookUpTableNamedMembers { get { if (_namedMembers == null) { _namedMembers = new SchemaElementLookUpTable (); } return _namedMembers; } } /// /// /// public virtual bool IsTypeHierarchyRoot { get { Debug.Assert((BaseType == null && _unresolvedBaseType == null) || (BaseType != null && _unresolvedBaseType != null), "you are checking for the hierarchy root before the basetype has been set"); // any type without a base is a base type return BaseType == null; } } ////// /// public bool IsAbstract { get { return _isAbstract; } } #endregion #region More Public Methods ////// Find a property by name in the type hierarchy /// /// simple property name ///the StructuredProperty object if name exists, null otherwise public StructuredProperty FindProperty(string name) { StructuredProperty property = Properties.LookUpEquivalentKey(name); if (property != null) return property; if (IsTypeHierarchyRoot) return null; return BaseType.FindProperty(name); } ////// Determines whether this type is of the same type as baseType, /// or is derived from baseType. /// /// ///true if this type is of the baseType, false otherwise public bool IsOfType(StructuredType baseType) { StructuredType type = this; while (type != null && type != baseType) { type = type.BaseType; } return (type == baseType); } #endregion #region Protected Methods ////// /// internal override void ResolveTopLevelNames() { base.ResolveTopLevelNames(); TryResolveBaseType(); foreach (SchemaElement member in NamedMembers) member.ResolveTopLevelNames(); } ////// /// ///internal override void Validate() { base.Validate(); foreach (SchemaElement member in NamedMembers) { if (BaseType != null) { StructuredType definingType; SchemaElement definingMember; string errorMessage = null; if(HowDefined.AsMember == BaseType.DefinesMemberName(member.Name, out definingType, out definingMember)) { errorMessage = System.Data.Entity.Strings.DuplicateMemberName(member.Name, FQName, definingType.FQName); } if (errorMessage != null) member.AddError(ErrorCode.AlreadyDefined, EdmSchemaErrorSeverity.Error, errorMessage); } member.Validate(); } } /// /// /// /// protected StructuredType(Schema parentElement) : base(parentElement) { } ////// Add a member to the type /// /// the member being added protected void AddMember(SchemaElement newMember) { Debug.Assert(newMember != null, "newMember parameter is null"); if (string.IsNullOrEmpty(newMember.Name)) { // this is an error condition that has already been reported. return; } if (this.Schema.DataModel != SchemaDataModelOption.ProviderDataModel && Utils.CompareNames(newMember.Name, Name) == 0) { newMember.AddError(ErrorCode.BadProperty, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.InvalidMemberNameMatchesTypeName(newMember.Name, FQName)); } NamedMembers.Add(newMember, true, Strings.PropertyNameAlreadyDefinedDuplicate); } ////// See if a name is a member in a type or any of its base types /// /// name to look for /// if defined, the type that defines it /// if defined, the member that defines it ///how name was defined private HowDefined DefinesMemberName(string name, out StructuredType definingType, out SchemaElement definingMember) { if (NamedMembers.ContainsKey(name)) { definingType = this; definingMember = NamedMembers[name]; return HowDefined.AsMember; } definingMember = NamedMembers.LookUpEquivalentKey(name); Debug.Assert(definingMember == null, "we allow the scenario that members can have same name but different cases"); if (IsTypeHierarchyRoot) { definingType = null; definingMember = null; return HowDefined.NotDefined; } return BaseType.DefinesMemberName(name, out definingType, out definingMember); } #endregion #region Protected Properties ////// /// protected string UnresolvedBaseType { get { return _unresolvedBaseType; } set { _unresolvedBaseType = value; } } protected override bool HandleElement(XmlReader reader) { if (base.HandleElement(reader)) { return true; } else if (CanHandleElement(reader, XmlConstants.Property)) { HandlePropertyElement(reader); return true; } return false; } protected override bool HandleAttribute(XmlReader reader) { if (base.HandleAttribute(reader)) { return true; } else if (CanHandleAttribute(reader, XmlConstants.BaseType)) { HandleBaseTypeAttribute(reader); return true; } else if (CanHandleAttribute(reader, XmlConstants.Abstract)) { HandleAbstractAttribute(reader); return true; } return false; } #endregion #region Private Methods ////// /// private bool TryResolveBaseType() { if (_baseTypeResolveResult.HasValue) { return _baseTypeResolveResult.Value; } if (BaseType != null) { _baseTypeResolveResult = true; return _baseTypeResolveResult.Value; } if (UnresolvedBaseType == null) { _baseTypeResolveResult = true; return _baseTypeResolveResult.Value; } SchemaType element; if (!Schema.ResolveTypeName(this, UnresolvedBaseType, out element)) { _baseTypeResolveResult = false; return _baseTypeResolveResult.Value; } BaseType = element as StructuredType; if (BaseType == null) { AddError(ErrorCode.InvalidBaseType, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.InvalidBaseTypeForStructuredType(UnresolvedBaseType, FQName)); _baseTypeResolveResult = false; return _baseTypeResolveResult.Value; } // verify that creating this link to the base type will not introduce a cycle; // if so, break the link and add an error if (CheckForInheritanceCycle()) { BaseType = null; AddError(ErrorCode.CycleInTypeHierarchy, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.CycleInTypeHierarchy(FQName)); _baseTypeResolveResult = false; return _baseTypeResolveResult.Value; } _baseTypeResolveResult = true; return true; } ////// /// /// private void HandleBaseTypeAttribute(XmlReader reader) { Debug.Assert(UnresolvedBaseType == null, string.Format(CultureInfo.CurrentCulture, "{0} is already defined", reader.Name)); string baseType; if (!Utils.GetDottedName(this.Schema, reader, out baseType)) return; UnresolvedBaseType = baseType; } ////// /// /// private void HandleAbstractAttribute(XmlReader reader) { HandleBoolAttribute(reader, ref _isAbstract); } ////// /// /// private void HandlePropertyElement(XmlReader reader) { StructuredProperty property = new StructuredProperty(this); property.Parse(reader); AddMember(property); } ////// Determine if a cycle exists in the type hierarchy: use two pointers to /// walk the chain, if one catches up with the other, we have a cycle. /// ///true if a cycle exists in the type hierarchy, false otherwise private bool CheckForInheritanceCycle() { StructuredType baseType = BaseType; Debug.Assert(baseType != null); StructuredType ref1 = baseType; StructuredType ref2 = baseType; do { ref2 = ref2.BaseType; if (Object.ReferenceEquals(ref1, ref2)) return true; if (ref1 == null) return false; ref1 = ref1.BaseType; if (ref2 != null) ref2 = ref2.BaseType; } while (ref2 != null); return false; } #endregion #region Private Properties #endregion private enum HowDefined { NotDefined, AsMember, } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.Collections.Specialized; using System.Xml; using System.Data; using System.Data.Metadata.Edm; using System.Diagnostics; using System.Data.Entity; using System.Globalization; namespace System.Data.EntityModel.SchemaObjectModel { ////// Summary description for StructuredType. /// internal abstract class StructuredType : SchemaType { #region Instance Fields private bool? _baseTypeResolveResult; private string _unresolvedBaseType = null; private StructuredType _baseType = null; private bool _isAbstract = false; private SchemaElementLookUpTable_namedMembers = null; private ISchemaElementLookUpTable _properties = null; #endregion #region Static Fields private static readonly char[] NameSeparators = new char[] { '.' }; #endregion #region Public Properties /// /// /// public StructuredType BaseType { get { return _baseType; } private set { _baseType = value; } } ////// /// /// public ISchemaElementLookUpTableProperties { get { if (_properties == null) { _properties = new FilteredSchemaElementLookUpTable (NamedMembers); } return _properties; } } /// /// /// /// protected SchemaElementLookUpTableNamedMembers { get { if (_namedMembers == null) { _namedMembers = new SchemaElementLookUpTable (); } return _namedMembers; } } /// /// /// public virtual bool IsTypeHierarchyRoot { get { Debug.Assert((BaseType == null && _unresolvedBaseType == null) || (BaseType != null && _unresolvedBaseType != null), "you are checking for the hierarchy root before the basetype has been set"); // any type without a base is a base type return BaseType == null; } } ////// /// public bool IsAbstract { get { return _isAbstract; } } #endregion #region More Public Methods ////// Find a property by name in the type hierarchy /// /// simple property name ///the StructuredProperty object if name exists, null otherwise public StructuredProperty FindProperty(string name) { StructuredProperty property = Properties.LookUpEquivalentKey(name); if (property != null) return property; if (IsTypeHierarchyRoot) return null; return BaseType.FindProperty(name); } ////// Determines whether this type is of the same type as baseType, /// or is derived from baseType. /// /// ///true if this type is of the baseType, false otherwise public bool IsOfType(StructuredType baseType) { StructuredType type = this; while (type != null && type != baseType) { type = type.BaseType; } return (type == baseType); } #endregion #region Protected Methods ////// /// internal override void ResolveTopLevelNames() { base.ResolveTopLevelNames(); TryResolveBaseType(); foreach (SchemaElement member in NamedMembers) member.ResolveTopLevelNames(); } ////// /// ///internal override void Validate() { base.Validate(); foreach (SchemaElement member in NamedMembers) { if (BaseType != null) { StructuredType definingType; SchemaElement definingMember; string errorMessage = null; if(HowDefined.AsMember == BaseType.DefinesMemberName(member.Name, out definingType, out definingMember)) { errorMessage = System.Data.Entity.Strings.DuplicateMemberName(member.Name, FQName, definingType.FQName); } if (errorMessage != null) member.AddError(ErrorCode.AlreadyDefined, EdmSchemaErrorSeverity.Error, errorMessage); } member.Validate(); } } /// /// /// /// protected StructuredType(Schema parentElement) : base(parentElement) { } ////// Add a member to the type /// /// the member being added protected void AddMember(SchemaElement newMember) { Debug.Assert(newMember != null, "newMember parameter is null"); if (string.IsNullOrEmpty(newMember.Name)) { // this is an error condition that has already been reported. return; } if (this.Schema.DataModel != SchemaDataModelOption.ProviderDataModel && Utils.CompareNames(newMember.Name, Name) == 0) { newMember.AddError(ErrorCode.BadProperty, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.InvalidMemberNameMatchesTypeName(newMember.Name, FQName)); } NamedMembers.Add(newMember, true, Strings.PropertyNameAlreadyDefinedDuplicate); } ////// See if a name is a member in a type or any of its base types /// /// name to look for /// if defined, the type that defines it /// if defined, the member that defines it ///how name was defined private HowDefined DefinesMemberName(string name, out StructuredType definingType, out SchemaElement definingMember) { if (NamedMembers.ContainsKey(name)) { definingType = this; definingMember = NamedMembers[name]; return HowDefined.AsMember; } definingMember = NamedMembers.LookUpEquivalentKey(name); Debug.Assert(definingMember == null, "we allow the scenario that members can have same name but different cases"); if (IsTypeHierarchyRoot) { definingType = null; definingMember = null; return HowDefined.NotDefined; } return BaseType.DefinesMemberName(name, out definingType, out definingMember); } #endregion #region Protected Properties ////// /// protected string UnresolvedBaseType { get { return _unresolvedBaseType; } set { _unresolvedBaseType = value; } } protected override bool HandleElement(XmlReader reader) { if (base.HandleElement(reader)) { return true; } else if (CanHandleElement(reader, XmlConstants.Property)) { HandlePropertyElement(reader); return true; } return false; } protected override bool HandleAttribute(XmlReader reader) { if (base.HandleAttribute(reader)) { return true; } else if (CanHandleAttribute(reader, XmlConstants.BaseType)) { HandleBaseTypeAttribute(reader); return true; } else if (CanHandleAttribute(reader, XmlConstants.Abstract)) { HandleAbstractAttribute(reader); return true; } return false; } #endregion #region Private Methods ////// /// private bool TryResolveBaseType() { if (_baseTypeResolveResult.HasValue) { return _baseTypeResolveResult.Value; } if (BaseType != null) { _baseTypeResolveResult = true; return _baseTypeResolveResult.Value; } if (UnresolvedBaseType == null) { _baseTypeResolveResult = true; return _baseTypeResolveResult.Value; } SchemaType element; if (!Schema.ResolveTypeName(this, UnresolvedBaseType, out element)) { _baseTypeResolveResult = false; return _baseTypeResolveResult.Value; } BaseType = element as StructuredType; if (BaseType == null) { AddError(ErrorCode.InvalidBaseType, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.InvalidBaseTypeForStructuredType(UnresolvedBaseType, FQName)); _baseTypeResolveResult = false; return _baseTypeResolveResult.Value; } // verify that creating this link to the base type will not introduce a cycle; // if so, break the link and add an error if (CheckForInheritanceCycle()) { BaseType = null; AddError(ErrorCode.CycleInTypeHierarchy, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.CycleInTypeHierarchy(FQName)); _baseTypeResolveResult = false; return _baseTypeResolveResult.Value; } _baseTypeResolveResult = true; return true; } ////// /// /// private void HandleBaseTypeAttribute(XmlReader reader) { Debug.Assert(UnresolvedBaseType == null, string.Format(CultureInfo.CurrentCulture, "{0} is already defined", reader.Name)); string baseType; if (!Utils.GetDottedName(this.Schema, reader, out baseType)) return; UnresolvedBaseType = baseType; } ////// /// /// private void HandleAbstractAttribute(XmlReader reader) { HandleBoolAttribute(reader, ref _isAbstract); } ////// /// /// private void HandlePropertyElement(XmlReader reader) { StructuredProperty property = new StructuredProperty(this); property.Parse(reader); AddMember(property); } ////// Determine if a cycle exists in the type hierarchy: use two pointers to /// walk the chain, if one catches up with the other, we have a cycle. /// ///true if a cycle exists in the type hierarchy, false otherwise private bool CheckForInheritanceCycle() { StructuredType baseType = BaseType; Debug.Assert(baseType != null); StructuredType ref1 = baseType; StructuredType ref2 = baseType; do { ref2 = ref2.BaseType; if (Object.ReferenceEquals(ref1, ref2)) return true; if (ref1 == null) return false; ref1 = ref1.BaseType; if (ref2 != null) ref2 = ref2.BaseType; } while (ref2 != null); return false; } #endregion #region Private Properties #endregion private enum HowDefined { NotDefined, AsMember, } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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