Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Objects / FieldDescriptor.cs / 1 / FieldDescriptor.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Data.Common; using System.Data.Objects.DataClasses; using System.Data.Metadata.Edm; namespace System.Data.Objects { internal sealed class FieldDescriptor : PropertyDescriptor { private readonly EdmProperty _property; private readonly Type _fieldType; private readonly Type _componentType; private readonly bool _isReadOnly; ////// Construct a new instance of the FieldDescriptor class that describes a property /// on components of the supplied type. /// /// Type of object whose property is described by this FieldDescriptor. /// /// True if property value on component can be modified; otherwise false. /// /// /// EdmProperty that describes the property on the component. /// internal FieldDescriptor(Type componentType, bool isReadOnly, EdmProperty property) : base(property.Name, null) { _componentType = componentType; _property = property; _isReadOnly = isReadOnly; _fieldType = DetermineClrType(_property.TypeUsage); System.Diagnostics.Debug.Assert(_fieldType != null, "FieldDescriptor's CLR type has unexpected value of null."); } ////// Determine a CLR Type to use a property descriptro form an EDM TypeUsage /// /// The EDM TypeUsage containing metadata about the type ///A CLR type that represents that EDM type private Type DetermineClrType(TypeUsage typeUsage) { Type result = null; EdmType edmType = typeUsage.EdmType; switch (edmType.BuiltInTypeKind) { case BuiltInTypeKind.EntityType: case BuiltInTypeKind.ComplexType: result = edmType.ClrType; break; case BuiltInTypeKind.RefType: result = typeof(EntityKey); break; case BuiltInTypeKind.CollectionType: TypeUsage elementTypeUse = ((CollectionType)edmType).TypeUsage; result = DetermineClrType(elementTypeUse); result = typeof(IEnumerable<>).MakeGenericType(result); break; case BuiltInTypeKind.PrimitiveType: result = edmType.ClrType; Facet nullable; if (result.IsValueType && typeUsage.Facets.TryGetValue(DbProviderManifest.NullableFacetName, false, out nullable) && ((bool)nullable.Value)) { result = typeof(Nullable<>).MakeGenericType(result); } break; case BuiltInTypeKind.RowType: result = typeof(IDataRecord); break; default: throw EntityUtil.UnexpectedMetadataType(edmType); } return result; } ////// Get ///instance associated with this field descriptor. /// /// The internal EdmProperty EdmProperty { get { return _property; } } public override Type ComponentType { get { return _componentType; } } public override bool IsReadOnly { get { return _isReadOnly; } } public override Type PropertyType { get { return _fieldType; } } public override bool CanResetValue(object component) { return false; } public override object GetValue(object component) { EntityUtil.CheckArgumentNull(component, "component"); if (!_componentType.IsAssignableFrom(component.GetType())) { throw EntityUtil.IncompatibleArgument(); } object propertyValue; if (component is IEntityWithChangeTracker) //POCO will relax this requirement. { propertyValue = LightweightCodeGenerator.GetValue(_property, component); } else { DbDataRecord dbDataRecord = component as DbDataRecord; if (dbDataRecord != null) { propertyValue = (dbDataRecord.GetValue(dbDataRecord.GetOrdinal(_property.Name))); } else { throw EntityUtil.NotSupported(); } } return propertyValue; } public override void ResetValue(object component) { throw EntityUtil.NotSupported(); } public override void SetValue(object component, object value) { EntityUtil.CheckArgumentNull(component, "component"); if (!_componentType.IsAssignableFrom(component.GetType())) { throw EntityUtil.IncompatibleArgument(); } if (!_isReadOnly && component is IEntityWithChangeTracker) //POCO will relax this requirement { LightweightCodeGenerator.SetValue(_property, component, value); } // if not entity it must be readonly else { throw EntityUtil.WriteOperationNotAllowedOnReadOnlyBindingList(); } } public override bool ShouldSerializeValue(object component) { return false; } public override bool IsBrowsable { get { return true; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- //instance associated with this field descriptor, /// or null if there is no EDM property association. /// // Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Data.Common; using System.Data.Objects.DataClasses; using System.Data.Metadata.Edm; namespace System.Data.Objects { internal sealed class FieldDescriptor : PropertyDescriptor { private readonly EdmProperty _property; private readonly Type _fieldType; private readonly Type _componentType; private readonly bool _isReadOnly; ////// Construct a new instance of the FieldDescriptor class that describes a property /// on components of the supplied type. /// /// Type of object whose property is described by this FieldDescriptor. /// /// True if property value on component can be modified; otherwise false. /// /// /// EdmProperty that describes the property on the component. /// internal FieldDescriptor(Type componentType, bool isReadOnly, EdmProperty property) : base(property.Name, null) { _componentType = componentType; _property = property; _isReadOnly = isReadOnly; _fieldType = DetermineClrType(_property.TypeUsage); System.Diagnostics.Debug.Assert(_fieldType != null, "FieldDescriptor's CLR type has unexpected value of null."); } ////// Determine a CLR Type to use a property descriptro form an EDM TypeUsage /// /// The EDM TypeUsage containing metadata about the type ///A CLR type that represents that EDM type private Type DetermineClrType(TypeUsage typeUsage) { Type result = null; EdmType edmType = typeUsage.EdmType; switch (edmType.BuiltInTypeKind) { case BuiltInTypeKind.EntityType: case BuiltInTypeKind.ComplexType: result = edmType.ClrType; break; case BuiltInTypeKind.RefType: result = typeof(EntityKey); break; case BuiltInTypeKind.CollectionType: TypeUsage elementTypeUse = ((CollectionType)edmType).TypeUsage; result = DetermineClrType(elementTypeUse); result = typeof(IEnumerable<>).MakeGenericType(result); break; case BuiltInTypeKind.PrimitiveType: result = edmType.ClrType; Facet nullable; if (result.IsValueType && typeUsage.Facets.TryGetValue(DbProviderManifest.NullableFacetName, false, out nullable) && ((bool)nullable.Value)) { result = typeof(Nullable<>).MakeGenericType(result); } break; case BuiltInTypeKind.RowType: result = typeof(IDataRecord); break; default: throw EntityUtil.UnexpectedMetadataType(edmType); } return result; } ////// Get ///instance associated with this field descriptor. /// /// The internal EdmProperty EdmProperty { get { return _property; } } public override Type ComponentType { get { return _componentType; } } public override bool IsReadOnly { get { return _isReadOnly; } } public override Type PropertyType { get { return _fieldType; } } public override bool CanResetValue(object component) { return false; } public override object GetValue(object component) { EntityUtil.CheckArgumentNull(component, "component"); if (!_componentType.IsAssignableFrom(component.GetType())) { throw EntityUtil.IncompatibleArgument(); } object propertyValue; if (component is IEntityWithChangeTracker) //POCO will relax this requirement. { propertyValue = LightweightCodeGenerator.GetValue(_property, component); } else { DbDataRecord dbDataRecord = component as DbDataRecord; if (dbDataRecord != null) { propertyValue = (dbDataRecord.GetValue(dbDataRecord.GetOrdinal(_property.Name))); } else { throw EntityUtil.NotSupported(); } } return propertyValue; } public override void ResetValue(object component) { throw EntityUtil.NotSupported(); } public override void SetValue(object component, object value) { EntityUtil.CheckArgumentNull(component, "component"); if (!_componentType.IsAssignableFrom(component.GetType())) { throw EntityUtil.IncompatibleArgument(); } if (!_isReadOnly && component is IEntityWithChangeTracker) //POCO will relax this requirement { LightweightCodeGenerator.SetValue(_property, component, value); } // if not entity it must be readonly else { throw EntityUtil.WriteOperationNotAllowedOnReadOnlyBindingList(); } } public override bool ShouldSerializeValue(object component) { return false; } public override bool IsBrowsable { get { return true; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.instance associated with this field descriptor, /// or null if there is no EDM property association. ///
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- Accessible.cs
- Socket.cs
- SpoolingTask.cs
- XmlDataLoader.cs
- TransactionBridge.cs
- BuildDependencySet.cs
- WebBaseEventKeyComparer.cs
- Brushes.cs
- CacheAxisQuery.cs
- SByte.cs
- Point3DCollection.cs
- ServiceHostFactory.cs
- ValueUtilsSmi.cs
- PersonalizationAdministration.cs
- HtmlCalendarAdapter.cs
- X509AsymmetricSecurityKey.cs
- ResetableIterator.cs
- Missing.cs
- StrongNameKeyPair.cs
- URL.cs
- MethodToken.cs
- RsaSecurityToken.cs
- ScriptResourceHandler.cs
- ListItem.cs
- Image.cs
- GridEntry.cs
- Light.cs
- DesignerForm.cs
- DataTransferEventArgs.cs
- QueryableDataSourceEditData.cs
- ZipPackage.cs
- CodeConstructor.cs
- Graph.cs
- RtType.cs
- ArrayElementGridEntry.cs
- PackWebRequest.cs
- PropVariant.cs
- PolyLineSegmentFigureLogic.cs
- ListCardsInFileRequest.cs
- RoleGroupCollection.cs
- EntityContainerRelationshipSet.cs
- ClientEndpointLoader.cs
- ToolStripContentPanelRenderEventArgs.cs
- GridView.cs
- NullRuntimeConfig.cs
- UserControlFileEditor.cs
- InfoCardSymmetricCrypto.cs
- NativeCompoundFileAPIs.cs
- PartialClassGenerationTaskInternal.cs
- XmlDataSource.cs
- UnknownBitmapEncoder.cs
- DbLambda.cs
- CqlQuery.cs
- ServiceOperationHelpers.cs
- MultiView.cs
- SortDescriptionCollection.cs
- ConvertEvent.cs
- CodeAttributeArgumentCollection.cs
- GenericXmlSecurityToken.cs
- XomlCompiler.cs
- _SSPISessionCache.cs
- PreProcessInputEventArgs.cs
- ReplyChannelBinder.cs
- LayoutManager.cs
- ConnectionPoolManager.cs
- _AutoWebProxyScriptHelper.cs
- wgx_render.cs
- BooleanStorage.cs
- XmlNamespaceDeclarationsAttribute.cs
- EntityDescriptor.cs
- ServiceHttpHandlerFactory.cs
- WebSysDisplayNameAttribute.cs
- WCFServiceClientProxyGenerator.cs
- _Rfc2616CacheValidators.cs
- LinkUtilities.cs
- LineGeometry.cs
- XsdSchemaFileEditor.cs
- SaveFileDialog.cs
- ObjectDataSourceDisposingEventArgs.cs
- QilLoop.cs
- ObjRef.cs
- MessageSecurityOverTcpElement.cs
- RequestQueue.cs
- TextTreeFixupNode.cs
- TypeLibConverter.cs
- WindowsMenu.cs
- ITextView.cs
- RegexNode.cs
- PolicyLevel.cs
- DynamicMethod.cs
- RowToParametersTransformer.cs
- XhtmlBasicListAdapter.cs
- TemplateBuilder.cs
- OdbcConnectionFactory.cs
- DataTransferEventArgs.cs
- DirectoryInfo.cs
- TextRangeAdaptor.cs
- WebControlsSection.cs
- HttpModuleCollection.cs
- DataRowChangeEvent.cs