124 lines
4.0 KiB
C#
124 lines
4.0 KiB
C#
//-----------------------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//-----------------------------------------------------------------------------
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namespace System.Activities
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{
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using System;
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using System.Runtime;
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using System.Runtime.Serialization;
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using System.Runtime.DurableInstancing;
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[DataContract]
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public sealed class BookmarkScopeHandle : Handle
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{
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BookmarkScope bookmarkScope;
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static BookmarkScopeHandle defaultBookmarkScopeHandle = new BookmarkScopeHandle(BookmarkScope.Default);
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public BookmarkScopeHandle()
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{
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}
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internal BookmarkScopeHandle(BookmarkScope bookmarkScope)
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{
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this.bookmarkScope = bookmarkScope;
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if (bookmarkScope != null)
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{
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this.bookmarkScope.IncrementHandleReferenceCount();
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}
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}
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public static BookmarkScopeHandle Default
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{
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get
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{
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return defaultBookmarkScopeHandle;
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}
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}
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public BookmarkScope BookmarkScope
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{
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get
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{
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return this.bookmarkScope;
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}
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}
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[DataMember(EmitDefaultValue = false, Name = "bookmarkScope")]
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internal BookmarkScope SerializedBookmarkScope
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{
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get { return this.bookmarkScope; }
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set
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{
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this.bookmarkScope = value;
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if (this.bookmarkScope != null)
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{
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this.bookmarkScope.IncrementHandleReferenceCount();
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}
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}
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}
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//To be called from public APIs that need to verify the passed in context
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void ThrowIfContextIsNullOrDisposed(NativeActivityContext context)
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{
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if (context == null)
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{
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throw FxTrace.Exception.ArgumentNull("context");
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}
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context.ThrowIfDisposed();
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}
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public void CreateBookmarkScope(NativeActivityContext context)
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{
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this.ThrowIfContextIsNullOrDisposed(context);
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if (this.bookmarkScope != null)
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{
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throw FxTrace.Exception.AsError(new InvalidOperationException(SR.CreateBookmarkScopeFailed));
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}
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this.ThrowIfUninitialized();
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this.bookmarkScope = context.CreateBookmarkScope(Guid.Empty, this);
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this.bookmarkScope.IncrementHandleReferenceCount();
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}
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public void CreateBookmarkScope(NativeActivityContext context, Guid scopeId)
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{
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this.ThrowIfContextIsNullOrDisposed(context);
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if (this.bookmarkScope != null)
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{
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throw FxTrace.Exception.AsError(new InvalidOperationException(SR.CreateBookmarkScopeFailed));
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}
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this.ThrowIfUninitialized();
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this.bookmarkScope = context.CreateBookmarkScope(scopeId, this);
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this.bookmarkScope.IncrementHandleReferenceCount();
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}
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public void Initialize(NativeActivityContext context, Guid scope)
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{
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this.ThrowIfContextIsNullOrDisposed(context);
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this.ThrowIfUninitialized();
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this.bookmarkScope.Initialize(context, scope);
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}
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protected override void OnUninitialize(HandleInitializationContext context)
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{
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if (this.bookmarkScope != null)
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{
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int scopeRefCount = this.bookmarkScope.DecrementHandleReferenceCount();
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DisassociateInstanceKeysExtension extension = context.GetExtension<DisassociateInstanceKeysExtension>();
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// We only unregister the BookmarkScope if the extension exists and is enabled and if we had the last reference to it.
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if ((extension != null) && extension.AutomaticDisassociationEnabled && (scopeRefCount == 0))
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{
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context.UnregisterBookmarkScope(this.bookmarkScope);
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}
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}
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base.OnUninitialize(context);
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}
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}
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}
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