public MappableLocation(LocationReference locationOwner, Activity activity, System.Activities.ActivityInstance activityInstance, System.Activities.Location location)
{
this.Name = locationOwner.Name;
this.OwnerDisplayName = activity.DisplayName;
this.Location = location;
this.MappingKeyName = string.Format(CultureInfo.InvariantCulture, "activity.{0}-{1}_{2}", new object[] { activity.Id, locationOwner.Id, activityInstance.Id });
}
public InlinedLocationReference(LocationReference innerReference, Activity validAccessor, ArgumentDirection accessDirection)
{
this.innerReference = innerReference;
this.validAccessor = validAccessor;
this.allowReads = accessDirection != ArgumentDirection.Out;
this.allowWrites = accessDirection != ArgumentDirection.In;
}
public void Declare(LocationReference locationReference, Activity owner, ref IList<ValidationError> validationErrors)
{
if (locationReference.Name == null)
{
if (this.unnamedDeclarations == null)
{
this.unnamedDeclarations = new List<LocationReference>();
}
this.unnamedDeclarations.Add(locationReference);
}
else if (this.Declarations.ContainsKey(locationReference.Name))
{
string id = null;
if (owner != null)
{
id = owner.Id;
}
ValidationError data = new ValidationError(System.Activities.SR.SymbolNamesMustBeUnique(locationReference.Name)) {
Source = owner,
Id = id
};
ActivityUtilities.Add<ValidationError>(ref validationErrors, data);
}
else
{
this.Declarations.Add(locationReference.Name, locationReference);
}
}
public void Register(Location location, Activity activity, LocationReference locationOwner, System.Activities.ActivityInstance activityInstance)
{
if (this.mappableLocations == null)
{
this.mappableLocations = new List<MappableLocation>();
}
this.mappableLocations.Add(new MappableLocation(locationOwner, activity, activityInstance, location));
}
public InlinedLocationReference(LocationReference innerReference, Activity validAccessor)
{
this.innerReference = innerReference;
this.validAccessor = validAccessor;
this.allowReads = true;
this.allowWrites = true;
this.allowGetLocation = true;
}
private void AddProperty(LocationReference reference, Dictionary<string, object> names, List<PropertyDescriptorImpl> propertyList)
{
if (!string.IsNullOrEmpty(reference.Name) && !names.ContainsKey(reference.Name))
{
names.Add(reference.Name, reference);
PropertyDescriptorImpl item = new PropertyDescriptorImpl(reference);
propertyList.Add(item);
this.AddNotifyHandler(item);
}
}
private void AddProperty(LocationReference reference, Dictionary <string, object> names, List <PropertyDescriptorImpl> propertyList)
{
if (!string.IsNullOrEmpty(reference.Name) && !names.ContainsKey(reference.Name))
{
names.Add(reference.Name, reference);
PropertyDescriptorImpl item = new PropertyDescriptorImpl(reference);
propertyList.Add(item);
this.AddNotifyHandler(item);
}
}
internal T GetValueCore <T>(LocationReference locationReference)
{
System.Activities.Location location = locationReference.GetLocation(this);
Location <T> location2 = location as Location <T>;
if (location2 != null)
{
return(location2.Value);
}
return(TypeHelper.Convert <T>(location.Value));
}
public bool TryGetReferenceToPublicLocation(LocationReference publicReference,
out LocationReference equivalentReference)
{
if (publicReference == null)
{
throw FxTrace.Exception.ArgumentNull("publicReference");
}
ThrowIfUninitialized();
return(TryGetReferenceToPublicLocation(publicReference, false, out equivalentReference));
}
public bool TryGetAccessToPublicLocation(LocationReference publicLocation,
ArgumentDirection accessDirection, out LocationReference equivalentLocation)
{
if (publicLocation == null)
{
throw FxTrace.Exception.ArgumentNull("publicLocation");
}
ThrowIfUninitialized();
return(TryGetAccessToPublicLocation(publicLocation, accessDirection, false, out equivalentLocation));
}
public bool TryGetAccessToPublicLocation(LocationReference publicLocation,
ArgumentDirection accessDirection, out LocationReference equivalentLocation)
{
if (publicLocation == null)
{
throw FxTrace.Exception.ArgumentNull("publicLocation");
}
ThrowIfUninitialized();
return TryGetAccessToPublicLocation(publicLocation, accessDirection, false, out equivalentLocation);
}
public void SetValue <T>(LocationReference locationReference, T value)
{
ThrowIfDisposed();
if (locationReference == null)
{
throw FxTrace.Exception.ArgumentNull(nameof(locationReference));
}
SetValueCore <T>(locationReference, value);
}
public bool TryGetReferenceToPublicLocation(LocationReference publicReference,
out LocationReference equivalentReference)
{
if (publicReference == null)
{
throw FxTrace.Exception.ArgumentNull("publicReference");
}
ThrowIfUninitialized();
return TryGetReferenceToPublicLocation(publicReference, false, out equivalentReference);
}
// 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 FxTrace.Exception.ArgumentNull(nameof(locationReference));
}
return(GetValueCore <T>(locationReference));
}
internal bool TryGetInlinedLocationReference(LocationReference sourceReference, out LocationReference inlinedReference)
{
this.ThrowIfDisposed();
if (this.Environment.IsVisible(sourceReference))
{
this.CreateArgument(sourceReference);
inlinedReference = new InlinedLocationReference(sourceReference, this.activity);
return(true);
}
inlinedReference = null;
return(false);
}
/// <summary>
/// Gets the value core.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="locationReference">The location reference.</param>
/// <returns>T.</returns>
internal T GetValueCore <T>(LocationReference locationReference)
{
var location = locationReference.GetLocationForRead(this);
if (location is Location <T> typedLocation)
{
// 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));
}
}
public override bool IsVisible(LocationReference locationReference)
{
if (locationReference == null)
{
throw 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;
}
public override bool IsVisible(LocationReference locationReference)
{
if (locationReference == null)
{
throw 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);
}
internal void SetValueCore <T>(LocationReference locationReference, T value)
{
System.Activities.Location location = locationReference.GetLocation(this);
Location <T> location2 = location as Location <T>;
if (location2 != null)
{
location2.Value = value;
}
else
{
if (!TypeHelper.AreTypesCompatible(value, locationReference.Type))
{
throw FxTrace.Exception.AsError(new InvalidOperationException(System.Activities.SR.CannotSetValueToLocation((value != null) ? value.GetType() : typeof(T), locationReference.Name, locationReference.Type)));
}
location.Value = value;
}
}
// 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 (this.metadata.Environment.IsVisible(publicLocation))
{
if (!this.withoutArgument)
{
CreateArgument(publicLocation, accessDirection, useLocationReferenceValue);
}
equivalentLocation = new InlinedLocationReference(publicLocation, this.metadata.CurrentActivity, accessDirection);
return(true);
}
equivalentLocation = null;
return(false);
}
/// <summary>
/// Sets the value core.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="locationReference">The location reference.</param>
/// <param name="value">The value.</param>
/// <exception cref="InvalidOperationException"></exception>
internal void SetValueCore <T>(LocationReference locationReference, T value)
{
var location = locationReference.GetLocationForWrite(this);
if (location is Location <T> typedLocation)
{
// If we hit this path we can avoid boxing value types
typedLocation.Value = value;
}
else
{
if (!TypeHelper.AreTypesCompatible(value, locationReference.Type))
{
throw FxTrace.Exception.AsError(new InvalidOperationException(SR.CannotSetValueToLocation(value != null ? value.GetType() : typeof(T), locationReference.Name, locationReference.Type)));
}
location.Value = value;
}
}
public Location <T> GetLocation <T>(LocationReference locationReference)
{
this.ThrowIfDisposed();
if (locationReference == null)
{
throw FxTrace.Exception.ArgumentNull("locationReference");
}
System.Activities.Location innerLocation = locationReference.GetLocation(this);
Location <T> location2 = innerLocation as Location <T>;
if (location2 != null)
{
return(location2);
}
if (locationReference.Type != typeof(T))
{
throw FxTrace.Exception.AsError(new InvalidOperationException(System.Activities.SR.LocationTypeMismatch(locationReference.Name, typeof(T), locationReference.Type)));
}
return(new TypedLocationWrapper <T>(innerLocation));
}
public override bool TryGetLocationReference(string name, out LocationReference result)
{
if (name == null)
{
LocationReferenceEnvironment parent = base.Parent;
while (parent is ActivityLocationReferenceEnvironment)
{
parent = parent.Parent;
}
if (parent != null)
{
return(parent.TryGetLocationReference(name, out result));
}
}
else
{
if ((this.declarations != null) && this.declarations.TryGetValue(name, out result))
{
return(true);
}
bool flag = false;
LocationReferenceEnvironment environment2 = base.Parent;
while ((environment2 != null) && (environment2 is ActivityLocationReferenceEnvironment))
{
ActivityLocationReferenceEnvironment environment3 = (ActivityLocationReferenceEnvironment)environment2;
if ((environment3.declarations != null) && environment3.declarations.TryGetValue(name, out result))
{
return(true);
}
environment2 = environment2.Parent;
}
if ((!flag && (environment2 != null)) && environment2.TryGetLocationReference(name, out result))
{
return(true);
}
}
result = null;
return(false);
}
public void Declare(LocationReference locationReference, Activity owner, ref IList <ValidationError> validationErrors)
{
Fx.Assert(locationReference != null, "Must not be null");
if (locationReference.Name == null)
{
if (this.unnamedDeclarations == null)
{
this.unnamedDeclarations = new List <LocationReference>();
}
this.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 override bool IsVisible(LocationReference locationReference)
{
if (locationReference == null)
{
throw FxTrace.Exception.ArgumentNull("locationReference");
}
for (LocationReferenceEnvironment environment = this; environment != null; environment = environment.Parent)
{
ActivityLocationReferenceEnvironment environment2 = environment as ActivityLocationReferenceEnvironment;
if (environment2 == null)
{
return environment.IsVisible(locationReference);
}
if (environment2.declarations != null)
{
foreach (LocationReference reference in environment2.declarations.Values)
{
if (locationReference == reference)
{
return true;
}
}
}
if (environment2.unnamedDeclarations != null)
{
for (int i = 0; i < environment2.unnamedDeclarations.Count; i++)
{
if (locationReference == environment2.unnamedDeclarations[i])
{
return true;
}
}
}
}
return false;
}
public override bool IsVisible(LocationReference locationReference)
{
if (locationReference == null)
{
throw FxTrace.Exception.ArgumentNull("locationReference");
}
for (LocationReferenceEnvironment environment = this; environment != null; environment = environment.Parent)
{
ActivityLocationReferenceEnvironment environment2 = environment as ActivityLocationReferenceEnvironment;
if (environment2 == null)
{
return(environment.IsVisible(locationReference));
}
if (environment2.declarations != null)
{
foreach (LocationReference reference in environment2.declarations.Values)
{
if (locationReference == reference)
{
return(true);
}
}
}
if (environment2.unnamedDeclarations != null)
{
for (int i = 0; i < environment2.unnamedDeclarations.Count; i++)
{
if (locationReference == environment2.unnamedDeclarations[i])
{
return(true);
}
}
}
}
return(false);
}
// TODO 131998, We should support readonly LocationReferences.
// bool isReadOnly;
/// <summary>
/// Initializes a new instance of the <see cref="PropertyDescriptorImpl"/> class.
/// </summary>
/// <param name="reference">The reference.</param>
public PropertyDescriptorImpl(LocationReference reference)
: base(reference.Name, Array.Empty <Attribute>()) => this.LocationReference = reference;
public void SetValue <T> (LocationReference locationReference, T value)
{
throw new NotImplementedException();
}
public T GetValue <T> (LocationReference locationReference)
{
throw new NotImplementedException();
}
internal void CreateLocationArgument(LocationReference sourceReference, bool useLocationReferenceValue = false)
{
ActivityWithResult expression = ActivityUtilities.CreateLocationAccessExpression(sourceReference, true, useLocationReferenceValue);
AddGeneratedArgument(expression.ResultType, ArgumentDirection.In, expression);
}
public abstract bool IsVisible(LocationReference locationReference);
internal void CreateLocationArgument(LocationReference sourceReference, bool useLocationReferenceValue = false)
{
ActivityWithResult expression = ActivityUtilities.CreateLocationAccessExpression(sourceReference, true, useLocationReferenceValue);
AddGeneratedArgument(expression.ResultType, ArgumentDirection.In, expression);
}
public InlinedLocationReference(LocationReference innerReference, Activity validAccessor)
{
this.innerReference = innerReference;
this.validAccessor = validAccessor;
}
internal void CreateArgument(LocationReference sourceReference, ArgumentDirection accessDirection, bool useLocationReferenceValue = false)
{
var expression = ActivityUtilities.CreateLocationAccessExpression(sourceReference, accessDirection != ArgumentDirection.In, useLocationReferenceValue);
AddGeneratedArgument(sourceReference.Type, accessDirection, expression);
}
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 (this.declarations != null && this.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;
}
public void Declare(LocationReference locationReference, Activity owner, ref IList<ValidationError> validationErrors)
{
Fx.Assert(locationReference != null, "Must not be null");
if (locationReference.Name == null)
{
if (this.unnamedDeclarations == null)
{
this.unnamedDeclarations = new List<LocationReference>();
}
this.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 static ActivityWithResult CreateLocationReferenceValue(LocationReference locationReference)
{
return((ActivityWithResult)Activator.CreateInstance(locationReferenceValueType.MakeGenericType(new Type[] { locationReference.Type }), new object[] { 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 (this.declarations != null && this.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);
}
public override bool TryGetLocationReference(string name, out LocationReference result)
{
if (name == null)
{
LocationReferenceEnvironment parent = base.Parent;
while (parent is ActivityLocationReferenceEnvironment)
{
parent = parent.Parent;
}
if (parent != null)
{
return parent.TryGetLocationReference(name, out result);
}
}
else
{
if ((this.declarations != null) && this.declarations.TryGetValue(name, out result))
{
return true;
}
bool flag = false;
LocationReferenceEnvironment environment2 = base.Parent;
while ((environment2 != null) && (environment2 is ActivityLocationReferenceEnvironment))
{
ActivityLocationReferenceEnvironment environment3 = (ActivityLocationReferenceEnvironment) environment2;
if ((environment3.declarations != null) && environment3.declarations.TryGetValue(name, out result))
{
return true;
}
environment2 = environment2.Parent;
}
if ((!flag && (environment2 != null)) && environment2.TryGetLocationReference(name, out result))
{
return true;
}
}
result = null;
return false;
}
public abstract bool TryGetLocationReference(string name, out LocationReference result);
//
public PropertyDescriptorImpl(LocationReference reference)
: base(reference.Name, new Attribute[0])
{
this.reference = reference;
}
public InlinedLocationReference(LocationReference innerReference, Activity validAccessor)
{
this.innerReference = innerReference;
this.validAccessor = validAccessor;
}
public Location <T> GetLocation <T> (LocationReference locationReference)
{
throw new NotImplementedException();
}
// 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 (this.metadata.Environment.IsVisible(publicLocation))
{
if (!this.withoutArgument)
{
CreateArgument(publicLocation, accessDirection, useLocationReferenceValue);
}
equivalentLocation = new InlinedLocationReference(publicLocation, this.metadata.CurrentActivity, accessDirection);
return true;
}
equivalentLocation = null;
return false;
}
public LocationReferenceValue(System.Activities.LocationReference locationReference)
{
this.locationReference = locationReference;
}
//
public PropertyDescriptorImpl(LocationReference reference)
: base(reference.Name, new Attribute[0])
{
this.reference = reference;
}
public static ActivityWithResult CreateNewLocationAccessExpression(Type type, bool isReference, bool useLocationReferenceValue, LocationReference locationReference)
{
Dictionary <Type, ILocationReferenceExpression> lookupTable;
object tableLock;
if (useLocationReferenceValue)
{
lookupTable = locationReferenceValueTypeDefinitions;
tableLock = locationReferenceValueTypeDefinitionsLock;
}
else
{
lookupTable = isReference ? environmentLocationReferenceTypeDefinitions : environmentLocationValueTypeDefinitions;
tableLock = isReference ? environmentLocationReferenceTypeDefinitionsLock : environmentLocationValueTypeDefinitionsLock;
}
ILocationReferenceExpression existingInstance;
lock (tableLock)
{
if (!lookupTable.TryGetValue(type, out existingInstance))
{
var locationAccessExpressionType = CreateLocationAccessExpressionType(type, isReference, useLocationReferenceValue);
// Create an "empty" (locationReference = null) instance to put in the
// cache. This empty instance will only be used to create other instances,
// including the instance returned from this method. The cached instance
// will never be included in an activity tree, so the cached instance's
// rootActivity field will not be filled in and thus will not pin all the
// objects in the activity tree. The cached empty instance has a null
// locationReference because locationReference also pins parts of activity tree.
existingInstance = (ILocationReferenceExpression)Activator.CreateInstance(
locationAccessExpressionType, BindingFlags.Instance | BindingFlags.NonPublic, null, new object[] { null }, null);
lookupTable[type] = existingInstance;
}
}
return(existingInstance.CreateNewInstance(locationReference));
}