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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.Activities
{
using System;
using System.Activities.Runtime;
using System.Diagnostics.CodeAnalysis;
using System.Runtime;
[Fx.Tag.XamlVisible(false)]
public sealed class HandleInitializationContext
{
ActivityExecutor executor;
ActivityInstance scope;
bool isDiposed;
internal HandleInitializationContext(ActivityExecutor executor, ActivityInstance scope)
{
this.executor = executor;
this.scope = scope;
}
internal ActivityInstance OwningActivityInstance
{
get
{
return this.scope;
}
}
internal ActivityExecutor Executor
{
get
{
return this.executor;
}
}
public THandle CreateAndInitializeHandle<THandle>() where THandle : Handle
{
ThrowIfDisposed();
THandle value = Activator.CreateInstance<THandle>();
value.Initialize(this);
// If we have a scope, we need to add this new handle to the LocationEnvironment.
if (this.scope != null)
{
this.scope.Environment.AddHandle(value);
}
// otherwise add it to the Executor.
else
{
this.executor.AddHandle(value);
}
return value;
}
public T GetExtension<T>() where T : class
{
return this.executor.GetExtension<T>();
}
public void UninitializeHandle(Handle handle)
{
ThrowIfDisposed();
handle.Uninitialize(this);
}
internal object CreateAndInitializeHandle(Type handleType)
{
Fx.Assert(ActivityUtilities.IsHandle(handleType), "This should only be called with Handle subtypes.");
object value = Activator.CreateInstance(handleType);
((Handle)value).Initialize(this);
// If we have a scope, we need to add this new handle to the LocationEnvironment.
if (this.scope != null)
{
this.scope.Environment.AddHandle((Handle)value);
}
// otherwise add it to the Executor.
else
{
this.executor.AddHandle((Handle)value);
}
return value;
}
internal BookmarkScope CreateAndRegisterBookmarkScope()
{
return this.executor.BookmarkScopeManager.CreateAndRegisterScope(Guid.Empty);
}
internal void UnregisterBookmarkScope(BookmarkScope bookmarkScope)
{
Fx.Assert(bookmarkScope != null, "The sub instance should not equal null.");
this.executor.BookmarkScopeManager.UnregisterScope(bookmarkScope);
}
void ThrowIfDisposed()
{
if (this.isDiposed)
{
throw FxTrace.Exception.AsError(new ObjectDisposedException(SR.HandleInitializationContextDisposed));
}
}
internal void Dispose()
{
this.isDiposed = true;
}
}
}
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