private static bool TryEvaluateExpression(string expressionString, Type locationValueType, LocationReferenceEnvironment locationReferenceEnvironment, ActivityContext context, out object result)
{
Type type;
expressionString = string.Format(CultureInfo.InvariantCulture, "[{0}]", new object[] { expressionString });
if (locationValueType != null)
{
type = typeof(Activity <>).MakeGenericType(new Type[] { typeof(Location <>).MakeGenericType(new Type[] { locationValueType }) });
}
else
{
type = typeof(Activity <object>);
}
ActivityWithResultConverter converter = new ActivityWithResultConverter(type);
TypeDescriptorContext context2 = new TypeDescriptorContext {
LocationReferenceEnvironment = locationReferenceEnvironment
};
ActivityWithResult expression = converter.ConvertFromString(context2, expressionString) as ActivityWithResult;
if (locationValueType != null)
{
LocationHelper helper = (LocationHelper)Activator.CreateInstance(typeof(LocationHelper).MakeGenericType(new Type[] { locationValueType }));
return(helper.TryGetValue(expression, locationReferenceEnvironment, context, out result));
}
return(TryEvaluateExpression <object>(expression, locationReferenceEnvironment, context, out result));
}
internal static Argument MorphArgument(ModelItem originalValue, Type targetType)
{
Argument morphed = null;
Argument original = (Argument)originalValue.GetCurrentValue();
ActivityWithResult originalExpression = original.Expression;
if (originalExpression != null)
{
Type expressionType = originalExpression.GetType();
Type expressionGenericType = expressionType.IsGenericType ? expressionType.GetGenericTypeDefinition() : null;
if (expressionGenericType != null)
{
bool isLocation = ExpressionHelper.IsGenericLocationExpressionType(originalExpression);
ActivityWithResult morphedExpression;
EditingContext context = originalValue.GetEditingContext();
morphed = Argument.Create(targetType, original.Direction);
if (ExpressionHelper.TryMorphExpression(originalExpression, isLocation, targetType,
context, out morphedExpression))
{
morphed.Expression = morphedExpression;
}
//[....]
}
}
return(morphed);
}
public static string ToString(ActivityWithResult activity)
{
if (activity == null)
{
return(null);
}
if (activity.GetType().IsConstructedGenericTypeOf(typeof(Literal <>)) && CSharpConvert.IsCodePrimitive(activity.ResultType))
{
return(CSharpConvert.ToString(((dynamic)activity).Value));
}
var serializableExpression = activity as IValueSerializableExpression;
if (serializableExpression != null && serializableExpression.CanConvertToString(null))
{
return(serializableExpression.ConvertToString(null));
}
var textExpression = activity as ITextExpression;
if (textExpression != null)
{
return(textExpression.ExpressionText);
}
return(null);
}
// Recompile the VBReference passed in, with its current LocationReferenceEnvironment context
// in a weakly-typed manner (the argument VBReference's type argument is ignored)
//[SuppressMessage(FxCop.Category.Design, FxCop.Rule.AvoidOutParameters,
// Justification = "Design has been approved")]
public static Activity RecompileVisualBasicReference(ActivityWithResult visualBasicReference,
out Type returnType,
out SourceExpressionException compileError,
out VisualBasicSettings vbSettings)
{
ITextExpression textExpression = visualBasicReference as ITextExpression;
if (textExpression == null || textExpression.Language != VisualBasicHelper.Language)
{
// the argument must be of type VisualBasicReference<>
throw FxTrace.Exception.AsError(new ArgumentException());
}
string expressionText = textExpression.ExpressionText;
LocationReferenceEnvironment environment = visualBasicReference.GetParentEnvironment();
List <string> namespaces;
List <string> referencedAssemblies;
GetAllImportReferences(visualBasicReference, out namespaces, out referencedAssemblies);
return(CreatePrecompiledVisualBasicReference(
null,
expressionText,
namespaces,
referencedAssemblies,
environment,
out returnType,
out compileError,
out vbSettings));
}
public override bool TryMorphExpression(ActivityWithResult expression, bool isLocationExpression, Type newType,
EditingContext context, out ActivityWithResult newExpression)
{
string expressionText = ExpressionHelper.GetExpressionString(expression);
newExpression = VisualBasicEditor.CreateExpressionFromString(newType, expressionText, isLocationExpression, new ParserContext());
return true;
}
public override bool TryMorphExpression(ActivityWithResult expression, bool isLocationExpression, Type newType,
EditingContext context, out ActivityWithResult newExpression)
{
Fx.Assert(expression != null, "Original expression shouldn't be null in morph helper");
Fx.Assert(context != null, "EditingContext shouldn't be null in morph helper");
newExpression = null;
if (expression.ResultType == newType &&
(ExpressionHelper.IsGenericLocationExpressionType(expression) == isLocationExpression))
{
newExpression = expression;
return(true);
}
if (context != null)
{
string expressionEditor = ExpressionHelper.GetRootEditorSetting(context.Services.GetService <ModelTreeManager>(), WorkflowDesigner.GetTargetFramework(context));
ParserContext parserContext = new ParserContext();
string expressionText = ExpressionHelper.GetExpressionString(expression, parserContext);
if (!string.IsNullOrEmpty(expressionEditor))
{
return(ExpressionTextBox.TryConvertFromString(expressionEditor, expressionText, isLocationExpression, newType, out newExpression));
}
}
return(false);
}
protected override void OnExecute(NativeActivityContext context, object objectToValidate, ValidationContext objectToValidateContext)
{
bool foundMultiple;
ActivityWithResult boundExpression;
LocationReference locationReference;
ActivityWithResult activity = (ActivityWithResult)objectToValidate;
foreach (RuntimeArgument runtimeArgument in activity.RuntimeArguments)
{
boundExpression = runtimeArgument.BoundArgument.Expression;
if (boundExpression != null && boundExpression is ILocationReferenceWrapper)
{
locationReference = ((ILocationReferenceWrapper)boundExpression).LocationReference;
if (locationReference != null)
{
foundMultiple = FindLocationReferencesFromEnvironment(objectToValidateContext.Environment, locationReference.Name);
if (foundMultiple)
{
Constraint.AddValidationError(context, new ValidationError(SR.AmbiguousVBVariableReference(locationReference.Name)));
}
}
}
}
}
public override bool TryMorphExpression(ActivityWithResult expression, bool isLocationExpression, Type newType,
EditingContext context, out ActivityWithResult newExpression)
{
Fx.Assert(expression != null, "Original expression shouldn't be null in morph helper");
Fx.Assert(context != null, "EditingContext shouldn't be null in morph helper");
newExpression = null;
if (expression.ResultType == newType &&
(ExpressionHelper.IsGenericLocationExpressionType(expression) == isLocationExpression))
{
newExpression = expression;
return true;
}
if (context != null)
{
string expressionEditor = ExpressionHelper.GetRootEditorSetting(context.Services.GetService<ModelTreeManager>(), WorkflowDesigner.GetTargetFramework(context));
ParserContext parserContext = new ParserContext();
string expressionText = ExpressionHelper.GetExpressionString(expression, parserContext);
if (!string.IsNullOrEmpty(expressionEditor))
{
return ExpressionTextBox.TryConvertFromString(expressionEditor, expressionText, isLocationExpression, newType, out newExpression);
}
}
return false;
}
public CompiledExpressionInvoker(ITextExpression expression, bool isReference, CodeActivityMetadata metadata)
{
if (metadata == null)
{
throw FxTrace.Exception.ArgumentNull(nameof(metadata));
}
this.expressionId = -1;
this.textExpression = expression ?? throw FxTrace.Exception.ArgumentNull(nameof(expression));
this.expressionActivity = expression as Activity;
this.isReference = isReference;
this.locationReferences = new List <LocationReference>();
this.metadata = metadata;
this.accessor = CodeActivityPublicEnvironmentAccessor.Create(this.metadata);
if (this.expressionActivity == null)
{
throw FxTrace.Exception.Argument(nameof(expression), SR.ITextExpressionParameterMustBeActivity);
}
ActivityWithResult resultActivity = this.expressionActivity as ActivityWithResult;
this.metadataRoot = metadata.Environment.Root;
this.ProcessLocationReferences();
}
public override bool TryMorphExpression(ActivityWithResult expression, bool isLocationExpression, Type newType,
EditingContext context, out ActivityWithResult newExpression)
{
string expressionText = ExpressionHelper.GetExpressionString(expression);
newExpression = VisualBasicEditor.CreateExpressionFromString(newType, expressionText, isLocationExpression, new ParserContext());
return(true);
}
private void GenerateExpression()
{
//TODO: Enhance the type infering logic
if (ExpressionType == null)
{
// Get the variables in scope
List <ModelItem> declaredVariables = CSharpExpressionHelper.GetVariablesInScope(OwnerActivity);
if (declaredVariables.Count > 0)
{
InferredType = ((LocationReference)declaredVariables[0].GetCurrentValue()).Type;
}
}
Type resultType = ExpressionType != null ? ExpressionType : InferredType;
////This could happen when:
////1) No ExpressionType is specified and
////2) The expression is invalid so that the inferred type equals to null
if (resultType == null)
{
resultType = typeof(object);
}
// If the text is null we don't need to bother generating the expression (this would be the case the
// first time you enter an ETB. We still need to generate the expression when it is EMPTY however - otherwise
// the case where you had an expression (valid or invalid), then deleted the whole thing will not be evaluated.
if (Text != null)
{
using (ModelEditingScope scope = OwnerActivity.BeginEdit("Property Change"))
if (OwnerActivity != null)
{
EditingState = EditingState.Validating;
// we set the expression to null
// a) when the expressionText is empty AND it's a reference expression or
// b) when the expressionText is empty AND the DefaultValue property is null
if (Text.Length == 0 &&
(UseLocationExpression || DefaultValue == null))
{
Expression = null;
}
else
{
if (Text.Length == 0)
{
Text = DefaultValue;
}
ModelTreeManager modelTreeManager = Context.Services.GetService <ModelTreeManager>();
ActivityWithResult newExpression = CSharpExpressionHelper.CreateExpressionFromString(Text, UseLocationExpression, resultType);
ModelItem expressionItem = modelTreeManager.CreateModelItem(null, newExpression);
Expression = expressionItem;
}
scope.Complete();
}
}
}
/// <summary>
/// Fix up activity reference after persistence
/// </summary>
/// <param name="activity">The persisted activity reference</param>
/// <param name="instanceMap">The map containing persisted activity references</param>
void ActivityInstanceMap.IActivityReference.Load(Activity activity, ActivityInstanceMap instanceMap)
{
if (!(activity is ActivityWithResult activityWithResult))
{
throw FxTrace.Exception.AsError(
new ValidationException(SR.ActivityTypeMismatch(activity.DisplayName, typeof(ActivityWithResult).Name)));
}
this.expressionActivity = activityWithResult;
}
internal void ValidateEntry(DynamicArgumentWrapperObject entry, DependencyPropertyChangedEventArgs e)
{
if (e.Property == DynamicArgumentWrapperObject.NameProperty)
{
if (this.IsDictionary.Value)
{
DataGridRow row = entry.Row;
string newName = e.NewValue as string;
bool duplicates =
this.DynamicArguments.Any <DynamicArgumentWrapperObject>(
p => string.Equals(p.Name, newName) && p != entry);
if (duplicates || string.IsNullOrEmpty(newName))
{
entry.Name = e.OldValue as string;
if (duplicates)
{
ErrorReporting.ShowErrorMessage(string.Format(CultureInfo.CurrentCulture, SR.DuplicateArgumentName, newName));
}
else
{
ErrorReporting.ShowErrorMessage(string.Format(CultureInfo.CurrentCulture, SR.EmptyArgumentName));
}
}
entry.IsValidating = false;
}
}
else
{
if (e.Property == DynamicArgumentWrapperObject.DirectionProperty)
{
entry.UseLocationExpression = (entry.Direction != ArgumentDirection.In);
}
if ((e.Property != DynamicArgumentWrapperObject.ExpressionProperty) && (entry.Expression != null))
{
ActivityWithResult expression = entry.Expression.GetCurrentValue() as ActivityWithResult;
if (expression != null)
{
ActivityWithResult newExpression;
if (ExpressionHelper.TryMorphExpression(expression, entry.UseLocationExpression, entry.Type, this.Context, out newExpression))
{
entry.Expression = (this.OwnerActivity as IModelTreeItem).ModelTreeManager.WrapAsModelItem(newExpression);
}
else
{
//Microsoft
entry.Expression = null;
}
}
}
entry.IsValidating = false;
}
}
/// <summary>
/// Release work item back to pool
/// </summary>
/// <param name="executor">Executor that owns the work item.</param>
protected override void ReleaseToPool(ActivityExecutor executor)
{
this.ClearForReuse();
this.expressionActivity = null;
this.instanceId = 0;
this.resultLocation = null;
this.nextArgumentWorkItem = null;
executor.ExecuteSynchronousExpressionWorkItemPool.Release(this);
}
public ExpressionReplacement(ActivityWithResult expressionToReplace, Argument oldArgument, Argument newArgument, ArgumentAccessor argumentAccessor)
{
Fx.Assert(expressionToReplace != null, "expressionToReplace cannot be null.");
Fx.Assert(oldArgument != null, "oldArgument cannot be null.");
Fx.Assert(newArgument != null, "newArgument cannot be null.");
Fx.Assert(argumentAccessor != null, "argumentAccessor cannot be null.");
this.ExpressionToReplace = expressionToReplace;
this.OldArgument = oldArgument;
this.NewArgument = newArgument;
this.ArgumentAccessor = argumentAccessor;
}
/// <summary>
/// Called each time a work item is acquired from the pool
/// </summary>
/// <param name="parentInstance">The ActivityInstance containin the variable or argument that contains this expression</param>
/// <param name="expressionActivity">The expression to evaluate</param>
/// <param name="instanceId">The ActivityInstanceID to use for expressionActivity</param>
/// <param name="resultLocation">Location where the result of expressionActivity should be placed</param>
/// <param name="nextArgumentWorkItem">WorkItem to execute after this one</param>
public void Initialize(ActivityInstance parentInstance, ActivityWithResult expressionActivity, long instanceId, Location resultLocation, ResolveNextArgumentWorkItem nextArgumentWorkItem)
{
this.Reinitialize(parentInstance);
Fx.Assert(resultLocation != null, "We should only use this work item when we are resolving arguments/variables and therefore have a result location.");
Fx.Assert(expressionActivity.IsFastPath, "Should only use this work item for fast path expressions");
this.expressionActivity = expressionActivity;
this.instanceId = instanceId;
this.resultLocation = resultLocation;
this.nextArgumentWorkItem = nextArgumentWorkItem;
}
/// <summary>
/// Fix up activity reference after persistence
/// </summary>
/// <param name="activity">The persisted activity reference</param>
/// <param name="instanceMap">The map containing persisted activity references</param>
void ActivityInstanceMap.IActivityReference.Load(Activity activity, ActivityInstanceMap instanceMap)
{
ActivityWithResult activityWithResult = activity as ActivityWithResult;
if (activityWithResult == null)
{
throw Microsoft.CoreWf.Internals.FxTrace.Exception.AsError(
new ValidationException(SR.ActivityTypeMismatch(activity.DisplayName, typeof(ActivityWithResult).Name)));
}
_expressionActivity = activityWithResult;
}
/// <summary>
/// Called each time a work item is acquired from the pool
/// </summary>
/// <param name="parentInstance">The ActivityInstance containin the variable or argument that contains this expression</param>
/// <param name="expressionActivity">The expression to evaluate</param>
/// <param name="instanceId">The ActivityInstanceID to use for expressionActivity</param>
/// <param name="resultLocation">Location where the result of expressionActivity should be placed</param>
/// <param name="nextArgumentWorkItem">WorkItem to execute after this one</param>
public void Initialize(ActivityInstance parentInstance, ActivityWithResult expressionActivity, long instanceId, Location resultLocation, ResolveNextArgumentWorkItem nextArgumentWorkItem)
{
this.Reinitialize(parentInstance);
Fx.Assert(resultLocation != null, "We should only use this work item when we are resolving arguments/variables and therefore have a result location.");
Fx.Assert(expressionActivity.IsFastPath, "Should only use this work item for fast path expressions");
this.expressionActivity = expressionActivity;
this.instanceId = instanceId;
this.resultLocation = resultLocation;
this.nextArgumentWorkItem = nextArgumentWorkItem;
}
internal static bool TryMorphExpression(ActivityWithResult originalExpression, bool isLocation, Type targetType,
EditingContext context, out ActivityWithResult morphedExpression)
{
bool succeeded = false;
morphedExpression = null;
if (originalExpression != null)
{
Type resultType = originalExpression.ResultType;
if ((isLocation) && (ExpressionHelper.IsGenericLocationExpressionType(originalExpression) && (targetType == resultType.GetGenericArguments()[0])) ||
(!isLocation) && (resultType == targetType))
{
//no need to morph
succeeded = true;
morphedExpression = originalExpression;
}
else
{
Type expressionType = originalExpression.GetType();
if (expressionType.IsGenericType)
{
expressionType = expressionType.GetGenericTypeDefinition();
}
ExpressionMorphHelperAttribute morphHelperAttribute = ExtensibilityAccessor.GetAttribute <ExpressionMorphHelperAttribute>(expressionType);
if (morphHelperAttribute != null)
{
ExpressionMorphHelper morphHelper = Activator.CreateInstance(morphHelperAttribute.ExpressionMorphHelperType) as ExpressionMorphHelper;
if (morphHelper != null)
{
succeeded = morphHelper.TryMorphExpression(originalExpression, isLocation, targetType, context, out morphedExpression);
if (succeeded && morphedExpression != null)
{
string editorName = ExpressionActivityEditor.GetExpressionActivityEditor(originalExpression);
if (!string.IsNullOrWhiteSpace(editorName))
{
ExpressionActivityEditor.SetExpressionActivityEditor(morphedExpression, editorName);
}
}
}
}
}
}
else
{
succeeded = true;
}
return(succeeded);
}
private int GetResultId(ActivityWithResult activity)
{
if (activity.Result != null)
{
return(activity.Result.Id);
}
for (int i = 0; i < activity.RuntimeArguments.Count; i++)
{
RuntimeArgument argument = activity.RuntimeArguments[i];
if (argument.IsResult)
{
return(argument.Id);
}
}
return(-1);
}
private void OnExpressionChanged()
{
IsSupportedExpression = true;
if (Expression == null)
{
Text = null;
}
else
{
// This is a necessary work-around for design-time validation to work properly on Variable/Argument designer. For ETB in Variable/Argument designer,
// this.Expression is actually a FakeModelItemImpl. For non-editing scenario, when the validation is done, it actually updates the validation related
// attached properties of the real ModelItem. So if we hook on this.Expression.PropertyChanged directly, we cannot get the property change notification.
// As the result, the UI of Variable/Argument designer won't be updated when the validation status is changed.
ActivityWithResult expression = Expression.GetCurrentValue() as ActivityWithResult;
Text = ExpressionHelper.GetExpressionString(expression);
}
}
internal static ExpressionReplacement ComputeExpressionReplacement(ActivityWithResult expression, Activity parentActivity, EditingContext context, ArgumentAccessorWrapperCache argumentAccessorWrapperCache, Type preferredReturnType = null)
{
Fx.Assert(expression != null, "expressions cannot be null.");
Fx.Assert(parentActivity != null, "parentActivity cannot be null.");
Fx.Assert(context != null, "context cannot be null.");
Fx.Assert(argumentAccessorWrapperCache != null, "argumentAccessorWrapperCache cannot be null.");
IEnumerable <ArgumentAccessorWrapper> argumentAccessorWrappers = argumentAccessorWrapperCache.GetArgumentAccessorWrappers(parentActivity);
if (argumentAccessorWrappers != null)
{
ArgumentAccessorWrapper argumentAccessorWrapper = argumentAccessorWrappers.FirstOrDefault(wrapper => object.ReferenceEquals(wrapper.Argument.Expression, expression));
if (argumentAccessorWrapper != null)
{
bool isLocationExpression = ExpressionHelper.IsGenericLocationExpressionType(expression);
bool canInferType = true;
Type expectedReturnType;
ActivityWithResult morphedExpression;
if (preferredReturnType != null)
{
expectedReturnType = preferredReturnType;
}
else
{
canInferType = ExpressionHelper.TryInferReturnType(expression, context, out expectedReturnType);
}
if (canInferType && expectedReturnType != null && ExpressionHelper.TryMorphExpression(expression, isLocationExpression, expectedReturnType, context, out morphedExpression))
{
Type expressionResultType = isLocationExpression ? expression.ResultType.GetGenericArguments()[0] : expression.ResultType;
if (expressionResultType != expectedReturnType)
{
Argument newArgument = Argument.Create(expectedReturnType, argumentAccessorWrapper.Argument.Direction);
newArgument.Expression = morphedExpression;
return(new ExpressionReplacement(expression, argumentAccessorWrapper.Argument, newArgument, argumentAccessorWrapper.ArgumentAccessor));
}
}
}
}
return(null);
}
protected override void GatherOutputs(ActivityInstance completedInstance)
{
int resultId = -1;
if (completedInstance.Activity.HandlerOf != null)
{
DelegateOutArgument resultArgument = completedInstance.Activity.HandlerOf.GetResultArgument();
if (resultArgument != null)
{
resultId = resultArgument.Id;
}
else
{
ActivityWithResult activity = completedInstance.Activity as ActivityWithResult;
// for auto-generated results, we should bind the value from the Handler if available
if (activity != null && TypeHelper.AreTypesCompatible(activity.ResultType, typeof(T)))
{
resultId = GetResultId(activity);
}
}
}
else
{
Fx.Assert(completedInstance.Activity is ActivityWithResult, "should only be using FuncCompletionCallbackWrapper with ActivityFunc and ActivityWithResult");
resultId = GetResultId((ActivityWithResult)completedInstance.Activity);
}
if (resultId >= 0)
{
Location location = completedInstance.Environment.GetSpecificLocation(resultId);
Location <T> typedLocation = location as Location <T>;
if (typedLocation != null)
{
_resultValue = typedLocation.Value;
}
else if (location != null)
{
_resultValue = TypeHelper.Convert <T>(location.Value);
}
}
}
public override ValidationResult Validate(object value, CultureInfo cultureInfo)
{
string errorMessage = string.Empty;
if (owner.Expression != value)
{
if (value != null)
{
ActivityWithResult expression = (value as ModelItem).GetCurrentValue() as ActivityWithResult;
if (expression == null)
{
errorMessage = string.Format(CultureInfo.CurrentUICulture, SR.ExpressionTypeDonnotMatch,
expression.GetType().FullName, typeof(ActivityWithResult).FullName);
}
else if ((owner.UseLocationExpression) && (!ExpressionHelper.IsGenericLocationExpressionType(expression)))
{
errorMessage = string.Format(CultureInfo.CurrentUICulture, SR.ExpressionTypeDonnotMatch,
expression.GetType().FullName, typeof(Activity <Location>).FullName);
}
else if ((!owner.UseLocationExpression && (owner.ExpressionType != null) && (expression.ResultType != owner.ExpressionType)) ||
(owner.UseLocationExpression && (owner.ExpressionType != null) && (expression.ResultType != typeof(Location <>).MakeGenericType(owner.ExpressionType))))
{
errorMessage = string.Format(CultureInfo.CurrentUICulture, SR.ExpressionTypeDonnotMatch,
expression.GetType().FullName, typeof(Activity <>).MakeGenericType(owner.ExpressionType).FullName);
}
}
}
if (!string.IsNullOrEmpty(errorMessage))
{
//Disable ToolTip on inner editor if it has
ToolTipService.SetIsEnabled(owner.Editor, false);
owner.ToolTip = errorMessage;
return(new ValidationResult(false, errorMessage));
}
else
{
ToolTipService.SetIsEnabled(owner.Editor, true);
owner.ToolTip = null;
return(new ValidationResult(true, null));
}
}
public static Activity RecompileVisualBasicValue(ActivityWithResult visualBasicValue, out Type returnType, out SourceExpressionException compileError, out VisualBasicSettings vbSettings)
{
IVisualBasicExpression expression = visualBasicValue as IVisualBasicExpression;
if (expression == null)
{
throw FxTrace.Exception.AsError(new ArgumentException());
}
string expressionText = expression.ExpressionText;
LocationReferenceEnvironment parentEnvironment = visualBasicValue.GetParentEnvironment();
HashSet <VisualBasicImportReference> allImportReferences = VisualBasicHelper.GetAllImportReferences((parentEnvironment != null) ? parentEnvironment.Root : null);
HashSet <string> namespaces = new HashSet <string>();
HashSet <string> referencedAssemblies = new HashSet <string>();
foreach (VisualBasicImportReference reference in allImportReferences)
{
namespaces.Add(reference.Import);
referencedAssemblies.Add(reference.Assembly);
}
return(CreatePrecompiledVisualBasicValue(null, expressionText, namespaces, referencedAssemblies, parentEnvironment, out returnType, out compileError, out vbSettings));
}
public override bool TryInferReturnType(ActivityWithResult expression, EditingContext context, out Type returnType)
{
bool succeeded = false;
Fx.Assert(expression.GetType().GetGenericTypeDefinition() == typeof(VisualBasicValue <>) ||
expression.GetType().GetGenericTypeDefinition() == typeof(VisualBasicReference <>), "VisualBasicExpressionMorphHelper should only apply to VB expression.");
SourceExpressionException compileError;
VisualBasicSettings settings;
if (ExpressionHelper.IsGenericLocationExpressionType(expression))
{
VisualBasicDesignerHelper.RecompileVisualBasicReference(
expression,
out returnType,
out compileError,
out settings);
}
else
{
VisualBasicDesignerHelper.RecompileVisualBasicValue(
expression,
out returnType,
out compileError,
out settings);
}
if (compileError == null)
{
succeeded = true;
if (settings != null)
{
//merge with import designer
foreach (VisualBasicImportReference reference in settings.ImportReferences)
{
ImportDesigner.AddImport(reference.Import, context);
}
}
}
return(succeeded);
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
Argument target = null;
ArgumentDirection direction = ArgumentDirection.In;
string directionString = parameter as string;
if (!string.IsNullOrEmpty(directionString))
{
direction = (ArgumentDirection)Enum.Parse(typeof(ArgumentDirection), directionString);
}
Activity expression = null;
ModelItem valueExpressionModelItem = value as ModelItem;
if (valueExpressionModelItem != null && typeof(Activity).IsAssignableFrom(valueExpressionModelItem.ItemType))
{
expression = (Activity)valueExpressionModelItem.GetCurrentValue();
}
ActivityWithResult activityWithResult = expression as ActivityWithResult;
if (expression != null && activityWithResult != null)
{
// In the In case the expression is of type Activity<T> so we want to create InArgument<T>
// In Out and InOut case the expresion is Activity<Location<T>> we want to create OutArgument<T>,InOutArgument<T>
Type argumentType;
if (direction == ArgumentDirection.In)
{
argumentType = activityWithResult.ResultType;
}
else
{
// if expression type is Location<T> argument type is T
argumentType = activityWithResult.ResultType.GetGenericArguments()[0];
}
target = Argument.Create(argumentType, direction);
target.Expression = activityWithResult;
}
return(new object[] { target });
}
// this method may has side effect, it may modify model.
internal static bool TryInferReturnType(ActivityWithResult expression, EditingContext context, out Type returnType)
{
bool succeeded = false;
returnType = null;
Type expressionType = expression.GetType();
if (expressionType.IsGenericType)
{
expressionType = expressionType.GetGenericTypeDefinition();
ExpressionMorphHelperAttribute morphHelperAttribute = ExtensibilityAccessor.GetAttribute <ExpressionMorphHelperAttribute>(expressionType);
if (morphHelperAttribute != null)
{
ExpressionMorphHelper morphHelper = Activator.CreateInstance(morphHelperAttribute.ExpressionMorphHelperType) as ExpressionMorphHelper;
if (morphHelper != null)
{
succeeded = morphHelper.TryInferReturnType(expression, context, out returnType);
}
}
}
return(succeeded);
}
static bool TryEvaluateExpression(
string expressionString,
Type locationValueType, // Non null for Reference type (location)
LocationReferenceEnvironment locationReferenceEnvironment,
CodeActivityContext context,
out object result)
{
expressionString = string.Format(CultureInfo.InvariantCulture, "[{0}]", expressionString);
Type activityType;
if (locationValueType != null)
{
activityType = typeof(Activity <>).MakeGenericType(typeof(Location <>).MakeGenericType(locationValueType));
}
else
{
activityType = typeof(Activity <object>);
}
// General expression.
ActivityWithResultConverter converter = new ActivityWithResultConverter(activityType);
ActivityWithResult expression = converter.ConvertFromString(
new TypeDescriptorContext {
LocationReferenceEnvironment = locationReferenceEnvironment
},
expressionString) as ActivityWithResult;
if (locationValueType != null)
{
Type locationHelperType = typeof(LocationHelper <>).MakeGenericType(locationValueType);
LocationHelper helper = (LocationHelper)Activator.CreateInstance(locationHelperType);
return(helper.TryGetValue(expression, locationReferenceEnvironment, context, out result));
}
else
{
return(TryEvaluateExpression(expression, locationReferenceEnvironment, context, out result));
}
}
static bool TryEvaluateExpression(
ActivityWithResult element,
LocationReferenceEnvironment locationReferenceEnvironment,
CodeActivityContext context,
out object result)
{
// value is some expression type and needs to be opened
context.Reinitialize(context.CurrentInstance, context.CurrentExecutor, element, context.CurrentInstance.InternalId);
if (element != null && !element.IsRuntimeReady)
{
WorkflowInspectionServices.CacheMetadata(element, locationReferenceEnvironment);
}
if (element == null || !element.IsFastPath)
{
result = SR.DebugInfoNotSkipArgumentResolution;
return(false);
}
result = element.InternalExecuteInResolutionContextUntyped(context);
return(true);
}
public override bool TryInferReturnType(ActivityWithResult expression, EditingContext context, out Type returnType)
{
bool succeeded = false;
Fx.Assert(expression.GetType().GetGenericTypeDefinition() == typeof(VisualBasicValue<>) ||
expression.GetType().GetGenericTypeDefinition() == typeof(VisualBasicReference<>), "VisualBasicExpressionMorphHelper should only apply to VB expression.");
SourceExpressionException compileError;
VisualBasicSettings settings;
if (ExpressionHelper.IsGenericLocationExpressionType(expression))
{
VisualBasicDesignerHelper.RecompileVisualBasicReference(
expression,
out returnType,
out compileError,
out settings);
}
else
{
VisualBasicDesignerHelper.RecompileVisualBasicValue(
expression,
out returnType,
out compileError,
out settings);
}
if (compileError == null)
{
succeeded = true;
if (settings != null)
{
//merge with import designer
foreach (VisualBasicImportReference reference in settings.ImportReferences)
{
ImportDesigner.AddImport(reference.Import, context);
}
}
}
return succeeded;
}
protected override void GatherOutputs(System.Activities.ActivityInstance completedInstance)
{
int id = -1;
if (completedInstance.Activity.HandlerOf != null)
{
DelegateOutArgument resultArgument = completedInstance.Activity.HandlerOf.GetResultArgument();
if (resultArgument != null)
{
id = resultArgument.Id;
}
else
{
ActivityWithResult activity = completedInstance.Activity as ActivityWithResult;
if ((activity != null) && TypeHelper.AreTypesCompatible(activity.ResultType, typeof(T)))
{
id = this.GetResultId(activity);
}
}
}
else
{
id = this.GetResultId((ActivityWithResult)completedInstance.Activity);
}
if (id >= 0)
{
System.Activities.Location specificLocation = completedInstance.Environment.GetSpecificLocation(id);
Location <T> location2 = specificLocation as Location <T>;
if (location2 != null)
{
this.resultValue = location2.Value;
}
else if (specificLocation != null)
{
this.resultValue = TypeHelper.Convert <T>(specificLocation.Value);
}
}
}
// Recompile the VBReference passed in, with its current LocationReferenceEnvironment context // in a weakly-typed manner (the argument VBReference's type argument is ignored) //[SuppressMessage(FxCop.Category.Design, FxCop.Rule.AvoidOutParameters, // Justification = "Design has been approved")] public static Activity RecompileVisualBasicReference(ActivityWithResult visualBasicReference, out Type returnType, out SourceExpressionException compileError, out VisualBasicSettings vbSettings) => Impl.RecompileReference(visualBasicReference, out returnType, out compileError, out vbSettings);
static bool TryEvaluateExpression(
ActivityWithResult element,
LocationReferenceEnvironment locationReferenceEnvironment,
CodeActivityContext context,
out object result)
{
// value is some expression type and needs to be opened
context.Reinitialize(context.CurrentInstance, context.CurrentExecutor, element, context.CurrentInstance.InternalId);
if (element != null && !element.IsRuntimeReady)
{
WorkflowInspectionServices.CacheMetadata(element, locationReferenceEnvironment);
}
if (element == null || !element.IsFastPath)
{
result = SR.DebugInfoNotSkipArgumentResolution;
return false;
}
result = element.InternalExecuteInResolutionContextUntyped(context);
return true;
}
/// <summary>
/// Fix up activity reference after persistence
/// </summary>
/// <param name="activity">The persisted activity reference</param>
/// <param name="instanceMap">The map containing persisted activity references</param>
void ActivityInstanceMap.IActivityReference.Load(Activity activity, ActivityInstanceMap instanceMap)
{
ActivityWithResult activityWithResult = activity as ActivityWithResult;
if (activityWithResult == null)
{
throw FxTrace.Exception.AsError(
new ValidationException(SR.ActivityTypeMismatch(activity.DisplayName, typeof(ActivityWithResult).Name)));
}
this.expressionActivity = activityWithResult;
}
internal static ExpressionReplacement ComputeExpressionReplacement(ActivityWithResult expression, Activity parentActivity, EditingContext context, ArgumentAccessorWrapperCache argumentAccessorWrapperCache, Type preferredReturnType = null)
{
Fx.Assert(expression != null, "expressions cannot be null.");
Fx.Assert(parentActivity != null, "parentActivity cannot be null.");
Fx.Assert(context != null, "context cannot be null.");
Fx.Assert(argumentAccessorWrapperCache != null, "argumentAccessorWrapperCache cannot be null.");
IEnumerable<ArgumentAccessorWrapper> argumentAccessorWrappers = argumentAccessorWrapperCache.GetArgumentAccessorWrappers(parentActivity);
if (argumentAccessorWrappers != null)
{
ArgumentAccessorWrapper argumentAccessorWrapper = argumentAccessorWrappers.FirstOrDefault(wrapper => object.ReferenceEquals(wrapper.Argument.Expression, expression));
if (argumentAccessorWrapper != null)
{
bool isLocationExpression = ExpressionHelper.IsGenericLocationExpressionType(expression);
bool canInferType = true;
Type expectedReturnType;
ActivityWithResult morphedExpression;
if (preferredReturnType != null)
{
expectedReturnType = preferredReturnType;
}
else
{
canInferType = ExpressionHelper.TryInferReturnType(expression, context, out expectedReturnType);
}
if (canInferType && expectedReturnType != null && ExpressionHelper.TryMorphExpression(expression, isLocationExpression, expectedReturnType, context, out morphedExpression))
{
Type expressionResultType = isLocationExpression ? expression.ResultType.GetGenericArguments()[0] : expression.ResultType;
if (expressionResultType != expectedReturnType)
{
Argument newArgument = Argument.Create(expectedReturnType, argumentAccessorWrapper.Argument.Direction);
newArgument.Expression = morphedExpression;
return new ExpressionReplacement(expression, argumentAccessorWrapper.Argument, newArgument, argumentAccessorWrapper.ArgumentAccessor);
}
}
}
}
return null;
}
public abstract bool TryMorphExpression(ActivityWithResult expression, bool isLocationExpression, Type newType,
EditingContext context, out ActivityWithResult newExpression);
//By default expression cannot infer the type.
public virtual bool TryInferReturnType(ActivityWithResult expression, EditingContext context, out Type returnType)
{
returnType = null;
return false;
}
internal static bool TryMorphExpression(ActivityWithResult originalExpression, bool isLocation, Type targetType,
EditingContext context, out ActivityWithResult morphedExpression)
{
bool succeeded = false;
morphedExpression = null;
if (originalExpression != null)
{
Type resultType = originalExpression.ResultType;
if ((isLocation) && (ExpressionHelper.IsGenericLocationExpressionType(originalExpression) && (targetType == resultType.GetGenericArguments()[0])) ||
(!isLocation) && (resultType == targetType))
{
//no need to morph
succeeded = true;
morphedExpression = originalExpression;
}
else
{
Type expressionType = originalExpression.GetType();
if (expressionType.IsGenericType)
{
expressionType = expressionType.GetGenericTypeDefinition();
}
ExpressionMorphHelperAttribute morphHelperAttribute = ExtensibilityAccessor.GetAttribute<ExpressionMorphHelperAttribute>(expressionType);
if (morphHelperAttribute != null)
{
ExpressionMorphHelper morphHelper = Activator.CreateInstance(morphHelperAttribute.ExpressionMorphHelperType) as ExpressionMorphHelper;
if (morphHelper != null)
{
succeeded = morphHelper.TryMorphExpression(originalExpression, isLocation, targetType, context, out morphedExpression);
if (succeeded && morphedExpression != null)
{
string editorName = ExpressionActivityEditor.GetExpressionActivityEditor(originalExpression);
if (!string.IsNullOrWhiteSpace(editorName))
{
ExpressionActivityEditor.SetExpressionActivityEditor(morphedExpression, editorName);
}
}
}
}
}
}
else
{
succeeded = true;
}
return succeeded;
}
internal static bool TryConvertString(string targetEditor, string expressionText, bool isLocationExpression, Type resultType, out ActivityWithResult expression)
{
expression = null;
if (targetEditor != null)
{
CreateExpressionFromStringCallback convertFromStringAction;
if (ConvertFromStringDelegates.TryGetValue(targetEditor, out convertFromStringAction))
{
if (convertFromStringAction != null)
{
expression = convertFromStringAction(expressionText, isLocationExpression, resultType);
return true;
}
}
}
return false;
}
internal static bool IsGenericLocationExpressionType(ActivityWithResult expression)
{
Type expressionType = expression.ResultType;
return(expressionType.IsGenericType && typeof(Location <>) == expressionType.GetGenericTypeDefinition());
}
/// <summary>
/// Release work item back to pool
/// </summary>
/// <param name="executor">Executor that owns the work item.</param>
protected override void ReleaseToPool(ActivityExecutor executor)
{
this.ClearForReuse();
this.expressionActivity = null;
this.instanceId = 0;
this.resultLocation = null;
this.nextArgumentWorkItem = null;
executor.ExecuteSynchronousExpressionWorkItemPool.Release(this);
}
internal static bool IsGenericLocationExpressionType(ActivityWithResult expression)
{
Type expressionType = expression.ResultType;
return expressionType.IsGenericType && typeof(Location<>) == expressionType.GetGenericTypeDefinition();
}
public ExpressionReplacement(ActivityWithResult expressionToReplace, Argument oldArgument, Argument newArgument, ArgumentAccessor argumentAccessor)
{
Fx.Assert(expressionToReplace != null, "expressionToReplace cannot be null.");
Fx.Assert(oldArgument != null, "oldArgument cannot be null.");
Fx.Assert(newArgument != null, "newArgument cannot be null.");
Fx.Assert(argumentAccessor != null, "argumentAccessor cannot be null.");
this.ExpressionToReplace = expressionToReplace;
this.OldArgument = oldArgument;
this.NewArgument = newArgument;
this.ArgumentAccessor = argumentAccessor;
}
// this method may has side effect, it may modify model.
internal static bool TryInferReturnType(ActivityWithResult expression, EditingContext context, out Type returnType)
{
bool succeeded = false;
returnType = null;
Type expressionType = expression.GetType();
if (expressionType.IsGenericType)
{
expressionType = expressionType.GetGenericTypeDefinition();
ExpressionMorphHelperAttribute morphHelperAttribute = ExtensibilityAccessor.GetAttribute<ExpressionMorphHelperAttribute>(expressionType);
if (morphHelperAttribute != null)
{
ExpressionMorphHelper morphHelper = Activator.CreateInstance(morphHelperAttribute.ExpressionMorphHelperType) as ExpressionMorphHelper;
if (morphHelper != null)
{
succeeded = morphHelper.TryInferReturnType(expression, context, out returnType);
}
}
}
return succeeded;
}
internal static bool TryConvertFromString(string targetEditor, string expressionText, bool isLocationExpression, Type resultType, out ActivityWithResult expression)
{
return ExpressionTextBoxViewModel.TryConvertString(targetEditor, expressionText, isLocationExpression, resultType, out expression);
}
