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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.Activities
{
using System.Activities.DynamicUpdate;
using System.Activities.Runtime;
using System.Activities.Validation;
using System.Collections.Generic;
using System.Runtime;
using System.Runtime.Serialization;
public abstract class CodeActivity : Activity
{
protected CodeActivity()
{
}
protected internal sealed override Version ImplementationVersion
{
get
{
return null;
}
set
{
if (value != null)
{
throw FxTrace.Exception.AsError(new NotSupportedException());
}
}
}
[IgnoreDataMember]
[Fx.Tag.KnownXamlExternal]
protected sealed override Func<Activity> Implementation
{
get
{
return null;
}
set
{
if (value != null)
{
throw FxTrace.Exception.AsError(new NotSupportedException());
}
}
}
protected abstract void Execute(CodeActivityContext context);
sealed internal override void InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager)
{
CodeActivityContext context = executor.CodeActivityContextPool.Acquire();
try
{
context.Initialize(instance, executor);
Execute(context);
}
finally
{
context.Dispose();
executor.CodeActivityContextPool.Release(context);
}
}
sealed internal override void InternalCancel(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager)
{
Fx.Assert("Cancel should never be called on CodeActivity since it's synchronous");
}
sealed internal override void InternalAbort(ActivityInstance instance, ActivityExecutor executor, Exception terminationReason)
{
// no-op, this is only called if an exception is thrown out of execute
}
sealed internal override void OnInternalCacheMetadata(bool createEmptyBindings)
{
CodeActivityMetadata metadata = new CodeActivityMetadata(this, this.GetParentEnvironment(), createEmptyBindings);
CacheMetadata(metadata);
metadata.Dispose();
if (this.RuntimeArguments == null || this.RuntimeArguments.Count == 0)
{
this.SkipArgumentResolution = true;
}
}
internal sealed override void OnInternalCreateDynamicUpdateMap(DynamicUpdateMapBuilder.Finalizer finalizer,
DynamicUpdateMapBuilder.IDefinitionMatcher matcher, Activity originalActivity)
{
}
protected sealed override void OnCreateDynamicUpdateMap(UpdateMapMetadata metadata, Activity originalActivity)
{
// NO OP
}
protected sealed override void CacheMetadata(ActivityMetadata metadata)
{
throw FxTrace.Exception.AsError(new InvalidOperationException(SR.WrongCacheMetadataForCodeActivity));
}
protected virtual void CacheMetadata(CodeActivityMetadata metadata)
{
// We bypass the metadata call to avoid the null checks
SetArgumentsCollection(ReflectedInformation.GetArguments(this), metadata.CreateEmptyBindings);
}
}
public abstract class CodeActivity<TResult> : Activity<TResult>
{
protected CodeActivity()
{
}
protected internal sealed override Version ImplementationVersion
{
get
{
return null;
}
set
{
if (value != null)
{
throw FxTrace.Exception.AsError(new NotSupportedException());
}
}
}
[IgnoreDataMember]
[Fx.Tag.KnownXamlExternal]
protected sealed override Func<Activity> Implementation
{
get
{
return null;
}
set
{
if (value != null)
{
throw FxTrace.Exception.AsError(new NotSupportedException());
}
}
}
protected abstract TResult Execute(CodeActivityContext context);
sealed internal override void InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager)
{
CodeActivityContext context = executor.CodeActivityContextPool.Acquire();
try
{
context.Initialize(instance, executor);
TResult executeResult = Execute(context);
this.Result.Set(context, executeResult);
}
finally
{
context.Dispose();
executor.CodeActivityContextPool.Release(context);
}
}
sealed internal override void InternalCancel(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager)
{
Fx.Assert("Cancel should never be called on CodeActivity<T> since it's synchronous");
}
sealed internal override void InternalAbort(ActivityInstance instance, ActivityExecutor executor, Exception terminationReason)
{
// no-op, this is only called if an exception is thrown out of execute
}
sealed internal override void OnInternalCacheMetadataExceptResult(bool createEmptyBindings)
{
CodeActivityMetadata metadata = new CodeActivityMetadata(this, this.GetParentEnvironment(), createEmptyBindings);
CacheMetadata(metadata);
metadata.Dispose();
if (this.RuntimeArguments == null || this.RuntimeArguments.Count == 0 ||
// If there's an argument named "Result", we can safely assume it's the actual result
// argument, because Activity<T> will raise a validation error if it's not.
(this.RuntimeArguments.Count == 1 && this.RuntimeArguments[0].Name == Argument.ResultValue))
{
this.SkipArgumentResolution = true;
}
}
sealed internal override TResult InternalExecuteInResolutionContext(CodeActivityContext context)
{
Fx.Assert(this.SkipArgumentResolution, "This method should only be called if SkipArgumentResolution is true");
return Execute(context);
}
internal sealed override void OnInternalCreateDynamicUpdateMap(DynamicUpdateMapBuilder.Finalizer finalizer,
DynamicUpdateMapBuilder.IDefinitionMatcher matcher, Activity originalActivity)
{
}
protected sealed override void OnCreateDynamicUpdateMap(UpdateMapMetadata metadata, Activity originalActivity)
{
// NO OP
}
protected sealed override void CacheMetadata(ActivityMetadata metadata)
{
throw FxTrace.Exception.AsError(new InvalidOperationException(SR.WrongCacheMetadataForCodeActivity));
}
protected virtual void CacheMetadata(CodeActivityMetadata metadata)
{
// We bypass the metadata call to avoid the null checks
SetArgumentsCollection(ReflectedInformation.GetArguments(this), metadata.CreateEmptyBindings);
}
}
}
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