Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / CompMod / System / ComponentModel / Design / Serialization / ContextStack.cs / 1 / ContextStack.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.ComponentModel.Design.Serialization { using System; using System.Collections; using System.Security.Permissions; ////// A context stack is an object that can be used by serializers /// to push various context objects. Serialization is often /// a deeply nested operation, involving many different /// serialization classes. These classes often need additional /// context information when performing serialization. As /// an example, an object with a property named "Enabled" may have /// a data type of System.Boolean. If a serializer is writing /// this value to a data stream it may want to know what property /// it is writing. It won't have this information, however, because /// it is only instructed to write the boolean value. In this /// case the parent serializer may push a PropertyDescriptor /// pointing to the "Enabled" property on the context stack. /// What objects get pushed on this stack are up to the /// individual serializer objects. /// [HostProtection(SharedState = true)] [System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.LinkDemand, Name = "FullTrust")] public sealed class ContextStack { private ArrayList contextStack; ////// Retrieves the current object on the stack, or null /// if no objects have been pushed. /// public object Current { get { if (contextStack != null && contextStack.Count > 0) { return contextStack[contextStack.Count - 1]; } return null; } } ////// Retrieves the object on the stack at the given /// level, or null if no object exists at that level. /// public object this[int level] { get { if (level < 0) { throw new ArgumentOutOfRangeException("level"); } if (contextStack != null && level < contextStack.Count) { return contextStack[contextStack.Count - 1 - level]; } return null; } } ////// Retrieves the first object on the stack that /// inherits from or implements the given type, or /// null if no object on the stack implements the type. /// public object this[Type type] { get { if (type == null) { throw new ArgumentNullException("type"); } if (contextStack != null) { int level = contextStack.Count; while(level > 0) { object value = contextStack[--level]; if (type.IsInstanceOfType(value)) { return value; } } } return null; } } ////// Appends an object to the end of the stack, rather than pushing it /// onto the top of the stack. This method allows a serializer to communicate /// with other serializers by adding contextual data that does not have to /// be popped in order. There is no way to remove an object that was /// appended to the end of the stack without popping all other objects. /// public void Append(object context) { if (context == null) { throw new ArgumentNullException("context"); } if (contextStack == null) { contextStack = new ArrayList(); } contextStack.Insert(0, context); } ////// Pops the current object off of the stack, returning /// its value. /// public object Pop() { object context = null; if (contextStack != null && contextStack.Count > 0) { int idx = contextStack.Count - 1; context = contextStack[idx]; contextStack.RemoveAt(idx); } return context; } ////// Pushes the given object onto the stack. /// public void Push(object context) { if (context == null) { throw new ArgumentNullException("context"); } if (contextStack == null) { contextStack = new ArrayList(); } contextStack.Add(context); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.ComponentModel.Design.Serialization { using System; using System.Collections; using System.Security.Permissions; ////// A context stack is an object that can be used by serializers /// to push various context objects. Serialization is often /// a deeply nested operation, involving many different /// serialization classes. These classes often need additional /// context information when performing serialization. As /// an example, an object with a property named "Enabled" may have /// a data type of System.Boolean. If a serializer is writing /// this value to a data stream it may want to know what property /// it is writing. It won't have this information, however, because /// it is only instructed to write the boolean value. In this /// case the parent serializer may push a PropertyDescriptor /// pointing to the "Enabled" property on the context stack. /// What objects get pushed on this stack are up to the /// individual serializer objects. /// [HostProtection(SharedState = true)] [System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.LinkDemand, Name = "FullTrust")] public sealed class ContextStack { private ArrayList contextStack; ////// Retrieves the current object on the stack, or null /// if no objects have been pushed. /// public object Current { get { if (contextStack != null && contextStack.Count > 0) { return contextStack[contextStack.Count - 1]; } return null; } } ////// Retrieves the object on the stack at the given /// level, or null if no object exists at that level. /// public object this[int level] { get { if (level < 0) { throw new ArgumentOutOfRangeException("level"); } if (contextStack != null && level < contextStack.Count) { return contextStack[contextStack.Count - 1 - level]; } return null; } } ////// Retrieves the first object on the stack that /// inherits from or implements the given type, or /// null if no object on the stack implements the type. /// public object this[Type type] { get { if (type == null) { throw new ArgumentNullException("type"); } if (contextStack != null) { int level = contextStack.Count; while(level > 0) { object value = contextStack[--level]; if (type.IsInstanceOfType(value)) { return value; } } } return null; } } ////// Appends an object to the end of the stack, rather than pushing it /// onto the top of the stack. This method allows a serializer to communicate /// with other serializers by adding contextual data that does not have to /// be popped in order. There is no way to remove an object that was /// appended to the end of the stack without popping all other objects. /// public void Append(object context) { if (context == null) { throw new ArgumentNullException("context"); } if (contextStack == null) { contextStack = new ArrayList(); } contextStack.Insert(0, context); } ////// Pops the current object off of the stack, returning /// its value. /// public object Pop() { object context = null; if (contextStack != null && contextStack.Count > 0) { int idx = contextStack.Count - 1; context = contextStack[idx]; contextStack.RemoveAt(idx); } return context; } ////// Pushes the given object onto the stack. /// public void Push(object context) { if (context == null) { throw new ArgumentNullException("context"); } if (contextStack == null) { contextStack = new ArrayList(); } contextStack.Add(context); } } } // 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
- SimpleWorkerRequest.cs
- ExpressionDumper.cs
- SqlDependencyListener.cs
- GridViewRow.cs
- _ShellExpression.cs
- SByteStorage.cs
- DependencyPropertyDescriptor.cs
- DbConnectionOptions.cs
- CreateUserWizardAutoFormat.cs
- PageContentAsyncResult.cs
- ImageListUtils.cs
- PackageRelationship.cs
- XPathNodeList.cs
- Transform.cs
- ComboBox.cs
- XmlILAnnotation.cs
- WindowsPen.cs
- AdapterDictionary.cs
- RsaSecurityToken.cs
- MessageBodyDescription.cs
- TraceHandlerErrorFormatter.cs
- SplineKeyFrames.cs
- X509Chain.cs
- EntityDataSourceColumn.cs
- WindowsListViewSubItem.cs
- IIS7WorkerRequest.cs
- DataConnectionHelper.cs
- PageMediaType.cs
- TextParentUndoUnit.cs
- x509utils.cs
- LongPath.cs
- EventLogPermission.cs
- Normalization.cs
- LoginViewDesigner.cs
- XmlEntity.cs
- QueryConverter.cs
- UnionQueryOperator.cs
- ScriptingRoleServiceSection.cs
- FloatUtil.cs
- SafeBitVector32.cs
- XslTransform.cs
- SizeFConverter.cs
- AutomationPropertyInfo.cs
- PropertyValueChangedEvent.cs
- XhtmlBasicLabelAdapter.cs
- OleDbMetaDataFactory.cs
- DefinitionBase.cs
- UserUseLicenseDictionaryLoader.cs
- SerialStream.cs
- DocumentPaginator.cs
- KeyManager.cs
- DataGridViewComboBoxEditingControl.cs
- DocumentPageView.cs
- HtmlEmptyTagControlBuilder.cs
- indexingfiltermarshaler.cs
- MetadataArtifactLoaderFile.cs
- PageOutputQuality.cs
- XmlILIndex.cs
- AssemblyNameProxy.cs
- XmlNotation.cs
- XmlILConstructAnalyzer.cs
- SiteMap.cs
- CompositionTarget.cs
- NameSpaceExtractor.cs
- QilReference.cs
- FormViewUpdatedEventArgs.cs
- DateTimeParse.cs
- QuotedPrintableStream.cs
- Matrix.cs
- InvalidEnumArgumentException.cs
- SingleObjectCollection.cs
- DispatcherHookEventArgs.cs
- MemberRelationshipService.cs
- PathSegmentCollection.cs
- SaveWorkflowAsyncResult.cs
- DetailsViewActionList.cs
- NoPersistProperty.cs
- ViewStateModeByIdAttribute.cs
- HttpRequest.cs
- ToolStripControlHost.cs
- XPathNavigatorKeyComparer.cs
- XamlPathDataSerializer.cs
- StylusEventArgs.cs
- QueryNode.cs
- InternalsVisibleToAttribute.cs
- DbConnectionPoolGroup.cs
- InvalidCastException.cs
- WindowsStartMenu.cs
- AccessViolationException.cs
- WebReferencesBuildProvider.cs
- MsmqBindingElementBase.cs
- DrawingAttributes.cs
- CustomValidator.cs
- ConfigurationSection.cs
- InvalidFilterCriteriaException.cs
- LineGeometry.cs
- HtmlTableCell.cs
- RotationValidation.cs
- ImageButton.cs
- SmtpTransport.cs