public bool TryGetAccessToPublicLocation(LocationReference publicLocation,
ArgumentDirection accessDirection, out LocationReference equivalentLocation)
{
if (publicLocation == null)
{
throw Microsoft.CoreWf.Internals.FxTrace.Exception.ArgumentNull("publicLocation");
}
ThrowIfUninitialized();
return(TryGetAccessToPublicLocation(publicLocation, accessDirection, false, out equivalentLocation));
}
public bool TryGetReferenceToPublicLocation(LocationReference publicReference,
out LocationReference equivalentReference)
{
if (publicReference == null)
{
throw Microsoft.CoreWf.Internals.FxTrace.Exception.ArgumentNull("publicReference");
}
ThrowIfUninitialized();
return(TryGetReferenceToPublicLocation(publicReference, false, out equivalentReference));
}
public void SetValue <T>(LocationReference locationReference, T value)
{
ThrowIfDisposed();
if (locationReference == null)
{
throw Microsoft.CoreWf.Internals.FxTrace.Exception.ArgumentNull("locationReference");
}
SetValueCore <T>(locationReference, value);
}
// Soft-Link: This method is referenced through reflection by
// ExpressionUtilities.TryRewriteLambdaExpression. Update that
// file if the signature changes.
public T GetValue <T>(LocationReference locationReference)
{
ThrowIfDisposed();
if (locationReference == null)
{
throw Microsoft.CoreWf.Internals.FxTrace.Exception.ArgumentNull("locationReference");
}
return(GetValueCore <T>(locationReference));
}
public override bool IsVisible(LocationReference locationReference)
{
if (locationReference == null)
{
throw Microsoft.CoreWf.Internals.FxTrace.Exception.ArgumentNull("locationReference");
}
LocationReferenceEnvironment currentScope = this;
while (currentScope != null)
{
ActivityLocationReferenceEnvironment activityEnvironment = currentScope as ActivityLocationReferenceEnvironment;
if (activityEnvironment != null)
{
if (activityEnvironment._declarations != null)
{
foreach (LocationReference declaration in activityEnvironment._declarations.Values)
{
if (locationReference == declaration)
{
return(true);
}
}
}
if (activityEnvironment._unnamedDeclarations != null)
{
for (int i = 0; i < activityEnvironment._unnamedDeclarations.Count; i++)
{
if (locationReference == activityEnvironment._unnamedDeclarations[i])
{
return(true);
}
}
}
}
else
{
return(currentScope.IsVisible(locationReference));
}
currentScope = currentScope.Parent;
}
return(false);
}
// In 4.0 the expression type for publicly inspectable auto-generated arguments was
// LocationReferenceValue<T>, whether the argument was actually used as an L-Value or R-Value.
// We keep that for back-compat (useLocationReferenceValue == true), and only use the new
// EnvironmentLocationValue/Reference classes for new activities.
internal bool TryGetAccessToPublicLocation(LocationReference publicLocation,
ArgumentDirection accessDirection, bool useLocationReferenceValue, out LocationReference equivalentLocation)
{
Fx.Assert(!useLocationReferenceValue || this.ActivityMetadata.CurrentActivity.UseOldFastPath, "useLocationReferenceValue should only be used for back-compat");
if (_metadata.Environment.IsVisible(publicLocation))
{
if (!_withoutArgument)
{
CreateArgument(publicLocation, accessDirection, useLocationReferenceValue);
}
equivalentLocation = new InlinedLocationReference(publicLocation, _metadata.CurrentActivity, accessDirection);
return(true);
}
equivalentLocation = null;
return(false);
}
internal T GetValueCore <T>(LocationReference locationReference)
{
Location location = locationReference.GetLocationForRead(this);
Location <T> typedLocation = location as Location <T>;
if (typedLocation != null)
{
// If we hit this path we can avoid boxing value types
return(typedLocation.Value);
}
else
{
Fx.Assert(location != null, "The contract of LocationReference is that GetLocation never returns null.");
return(TypeHelper.Convert <T>(location.Value));
}
}
internal void SetValueCore <T>(LocationReference locationReference, T value)
{
Location location = locationReference.GetLocationForWrite(this);
Location <T> typedLocation = location as Location <T>;
if (typedLocation != null)
{
// If we hit this path we can avoid boxing value types
typedLocation.Value = value;
}
else
{
if (!TypeHelper.AreTypesCompatible(value, locationReference.Type))
{
throw Microsoft.CoreWf.Internals.FxTrace.Exception.AsError(new InvalidOperationException(SR.CannotSetValueToLocation(value != null ? value.GetType() : typeof(T), locationReference.Name, locationReference.Type)));
}
location.Value = value;
}
}
public void Declare(LocationReference locationReference, Activity owner, ref IList <ValidationError> validationErrors)
{
Fx.Assert(locationReference != null, "Must not be null");
if (locationReference.Name == null)
{
if (_unnamedDeclarations == null)
{
_unnamedDeclarations = new List <LocationReference>();
}
_unnamedDeclarations.Add(locationReference);
}
else
{
if (this.Declarations.ContainsKey(locationReference.Name))
{
string id = null;
if (owner != null)
{
id = owner.Id;
}
ValidationError validationError = new ValidationError(SR.SymbolNamesMustBeUnique(locationReference.Name))
{
Source = owner,
Id = id
};
ActivityUtilities.Add(ref validationErrors, validationError);
}
else
{
this.Declarations.Add(locationReference.Name, locationReference);
}
}
}
public abstract bool TryGetLocationReference(string name, out LocationReference result);
public abstract bool IsVisible(LocationReference locationReference);
public override bool TryGetLocationReference(string name, out LocationReference result)
{
if (name == null)
{
// We don't allow null names in our LocationReferenceEnvironment but
// a custom declared environment might. We need to walk up
// to the root and see if it chains to a
// non-ActivityLocationReferenceEnvironment implementation
LocationReferenceEnvironment currentEnvironment = this.Parent;
while (currentEnvironment is ActivityLocationReferenceEnvironment)
{
currentEnvironment = currentEnvironment.Parent;
}
if (currentEnvironment != null)
{
Fx.Assert(!(currentEnvironment is ActivityLocationReferenceEnvironment), "We must be at a non-ActivityLocationReferenceEnvironment implementation.");
return(currentEnvironment.TryGetLocationReference(name, out result));
}
}
else
{
if (_declarations != null && _declarations.TryGetValue(name, out result))
{
return(true);
}
bool found = false;
LocationReferenceEnvironment currentEnvironment = this.Parent;
LocationReferenceEnvironment rootEnvironment = this;
// Loop through all of the ActivityLocationReferenceEnvironments we have chained together
while (currentEnvironment != null && currentEnvironment is ActivityLocationReferenceEnvironment)
{
ActivityLocationReferenceEnvironment activityEnvironment = (ActivityLocationReferenceEnvironment)currentEnvironment;
if (activityEnvironment._declarations != null && activityEnvironment._declarations.TryGetValue(name, out result))
{
return(true);
}
rootEnvironment = currentEnvironment;
currentEnvironment = currentEnvironment.Parent;
}
if (!found)
{
if (currentEnvironment != null)
{
// Looks like we have a non-ActivityLocationReferenceEnvironment at the root
Fx.Assert(!(currentEnvironment is ActivityLocationReferenceEnvironment), "We should have some other host environment at this point.");
if (currentEnvironment.TryGetLocationReference(name, out result))
{
return(true);
}
}
}
}
result = null;
return(false);
}
internal void CreateLocationArgument(LocationReference sourceReference, bool useLocationReferenceValue = false)
{
ActivityWithResult expression = ActivityUtilities.CreateLocationAccessExpression(sourceReference, true, useLocationReferenceValue);
AddGeneratedArgument(expression.ResultType, ArgumentDirection.In, expression);
}