Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Metadata / MetadataArtifactLoaderFile.cs / 1305376 / MetadataArtifactLoaderFile.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Collections.Generic; using System.Collections; using System.Diagnostics; using System.Globalization; using System.Reflection; using System.Text; using System.Xml; using System.Data.Mapping; using System.IO; using System.Security; using System.Security.Permissions; using System.Security.Cryptography; using System.Data.EntityModel.SchemaObjectModel; using System.Threading; using System.Runtime.Versioning; namespace System.Data.Metadata.Edm { ////// This class represents one file-based artifact item to be loaded. /// internal class MetadataArtifactLoaderFile : MetadataArtifactLoader, IComparable { ////// This member indicates whether the file-based artifact has already been loaded. /// It is used to prevent other instances of this class from (re)loading the same /// artifact. See comment in the MetadataArtifactLoaderFile c'tor below. /// private readonly bool _alreadyLoaded = false; private readonly string _path; ////// Constructor /// /// The path to the resource to load /// The global registry of URIs [ResourceExposure(ResourceScope.Machine)] //Exposes the file path which is a Machine resource public MetadataArtifactLoaderFile(string path, ICollectionuriRegistry) { _path = path; _alreadyLoaded = uriRegistry.Contains(_path); if (!_alreadyLoaded) { uriRegistry.Add(_path); // '_alreadyLoaded' is not set because while we would like to prevent // other instances of MetadataArtifactLoaderFile that wrap the same // _path from being added to the list of paths/readers, we do want to // include this particular instance. } } public override string Path { get { return _path; } } /// /// Implementation of IComparable.CompareTo() /// /// The object to compare to ///0 if the loaders are "equal" (i.e., have the same _path value) public int CompareTo(object obj) { MetadataArtifactLoaderFile loader = obj as MetadataArtifactLoaderFile; if (loader != null) { return string.Compare(_path, loader._path, StringComparison.OrdinalIgnoreCase); } Debug.Assert(false, "object is not a MetadataArtifactLoaderFile"); return -1; } ////// Equals() returns true if the objects have the same _path value /// /// The object to compare to ///true if the objects have the same _path value public override bool Equals(object obj) { return this.CompareTo(obj) == 0; } ////// GetHashCode override that defers the result to the _path member variable. /// ///public override int GetHashCode() { return _path.GetHashCode(); } public override void CollectFilePermissionPaths(List paths, DataSpace spaceToGet) { if (!_alreadyLoaded && MetadataArtifactLoader.IsArtifactOfDataSpace(_path, spaceToGet)) { paths.Add(_path); } } /// /// Get paths to artifacts for a specific DataSpace. /// /// The DataSpace for the artifacts of interest ///A List of strings identifying paths to all artifacts for a specific DataSpace public override ListGetPaths(DataSpace spaceToGet) { List list = new List (); if (!_alreadyLoaded && MetadataArtifactLoader.IsArtifactOfDataSpace(_path, spaceToGet)) { list.Add(_path); } return list; } /// /// Get paths to all artifacts /// ///A List of strings identifying paths to all resources public override ListGetPaths() { List list = new List (); if (!_alreadyLoaded) { list.Add(_path); } return list; } /// /// Create and return an XmlReader around the file represented by this instance. /// ///A List of XmlReaders for all resources public override ListGetReaders(Dictionary sourceDictionary) { List list = new List (); if (!_alreadyLoaded) { XmlReader reader = CreateXmlReader(); list.Add(reader); if (sourceDictionary != null) { sourceDictionary.Add(this, reader); } } return list; } /// /// Create and return an XmlReader around the file represented by this instance /// if it is of the requested DataSpace type. /// /// The DataSpace corresponding to the requested artifacts ///A List of XmlReader objects public override ListCreateReaders(DataSpace spaceToGet) { List list = new List (); if (!_alreadyLoaded && MetadataArtifactLoader.IsArtifactOfDataSpace(_path, spaceToGet)) { XmlReader reader = CreateXmlReader(); list.Add(reader); } return list; } /// /// Create an XmlReader around the artifact file /// ///An XmlReader that wraps a file [ResourceExposure(ResourceScope.None)] //The file path is not passed through to this method so nothing to expose in this method. [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)] //We are not changing the scope of consumption here private XmlReader CreateXmlReader() { XmlReaderSettings readerSettings = Schema.CreateEdmStandardXmlReaderSettings(); // we know that we aren't reading a fragment readerSettings.ConformanceLevel = ConformanceLevel.Document; return XmlReader.Create(_path, readerSettings); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- XmlWrappingReader.cs
- ViewGenerator.cs
- DockPattern.cs
- SchemaMerger.cs
- RelationshipNavigation.cs
- TextRangeEditTables.cs
- Emitter.cs
- ContentTextAutomationPeer.cs
- RSAPKCS1SignatureFormatter.cs
- TemplateColumn.cs
- StrokeDescriptor.cs
- ZipIOLocalFileBlock.cs
- TableItemStyle.cs
- ConfigsHelper.cs
- XmlSchemaAnnotated.cs
- SessionEndedEventArgs.cs
- DateTimeOffsetConverter.cs
- SqlResolver.cs
- Clipboard.cs
- LazyTextWriterCreator.cs
- HttpContextWrapper.cs
- TemplateXamlTreeBuilder.cs
- XmlBaseWriter.cs
- DocumentScope.cs
- Journaling.cs
- EncryptedType.cs
- ValidationRuleCollection.cs
- TraceHandlerErrorFormatter.cs
- Frame.cs
- RoutingEndpointTrait.cs
- StringConverter.cs
- RoutedEventValueSerializer.cs
- XmlToDatasetMap.cs
- ClientTargetSection.cs
- PageHandlerFactory.cs
- LinqDataView.cs
- SByteConverter.cs
- OutOfProcStateClientManager.cs
- BufferedGraphicsManager.cs
- ExistsInCollection.cs
- RectangleHotSpot.cs
- PrimitiveRenderer.cs
- HttpCapabilitiesSectionHandler.cs
- ClientSession.cs
- SecurityTokenSerializer.cs
- InstanceCollisionException.cs
- QilPatternFactory.cs
- WebServiceEnumData.cs
- SecurityPolicySection.cs
- LongValidatorAttribute.cs
- Compiler.cs
- CompoundFileDeflateTransform.cs
- AutomationEvent.cs
- ConfigurationValidatorAttribute.cs
- XmlJsonWriter.cs
- SmtpClient.cs
- TypeBrowserDialog.cs
- StreamReader.cs
- BitmapEffectCollection.cs
- DefaultHttpHandler.cs
- TypeDescriptor.cs
- InvokeProviderWrapper.cs
- GenericAuthenticationEventArgs.cs
- Int32Animation.cs
- ContentControl.cs
- MessageBox.cs
- DocumentGrid.cs
- VisualProxy.cs
- DataControlImageButton.cs
- SchemaType.cs
- WinInet.cs
- WindowsPen.cs
- TypedReference.cs
- MimeObjectFactory.cs
- EntityDataSourceSelectingEventArgs.cs
- NotifyCollectionChangedEventArgs.cs
- DataRow.cs
- SchemaTableOptionalColumn.cs
- NamespaceQuery.cs
- DbParameterHelper.cs
- ScrollItemPatternIdentifiers.cs
- SafeUserTokenHandle.cs
- CustomGrammar.cs
- PerspectiveCamera.cs
- UnmanagedBitmapWrapper.cs
- Block.cs
- GridViewCommandEventArgs.cs
- InternalConfigHost.cs
- CodeFieldReferenceExpression.cs
- XamlToRtfWriter.cs
- ExtenderHelpers.cs
- EmptyStringExpandableObjectConverter.cs
- CroppedBitmap.cs
- XmlWriter.cs
- InternalConfigRoot.cs
- EnumerableRowCollection.cs
- Line.cs
- WebResponse.cs
- PrivilegedConfigurationManager.cs
- WSDualHttpSecurityMode.cs