private List<PathInfo> ParseStringPath(System.Type activityType, string path)
{
if (string.IsNullOrEmpty(path))
{
return null;
}
List<PathInfo> pathInfoList = new List<PathInfo>();
PathWalker walker = new PathWalker();
PathMemberInfoEventArgs finalEventArgs = null;
PathErrorInfoEventArgs errorEventArgs = null;
walker.MemberFound = (EventHandler<PathMemberInfoEventArgs>) Delegate.Combine(walker.MemberFound, delegate (object sender, PathMemberInfoEventArgs eventArgs) {
finalEventArgs = eventArgs;
pathInfoList.Add(new PathInfo(eventArgs.Path, eventArgs.MemberInfo, BindHelpers.GetMemberType(eventArgs.MemberInfo)));
});
walker.PathErrorFound = (EventHandler<PathErrorInfoEventArgs>) Delegate.Combine(walker.PathErrorFound, delegate (object sender, PathErrorInfoEventArgs eventArgs) {
errorEventArgs = eventArgs;
});
walker.TryWalkPropertyPath(activityType, path);
return pathInfoList;
}
internal static MemberInfo GetMemberInfo(Type srcType, string path)
{
if (srcType == null)
throw new ArgumentNullException("srcType");
if (path == null)
throw new ArgumentNullException("path");
if (path.Length == 0)
throw new ArgumentException(SR.GetString(SR.Error_EmptyPathValue), "path");
Type propertyType = srcType;
MemberInfo memberInfo = null;
PathWalker pathWalker = new PathWalker();
pathWalker.MemberFound += delegate(object sender, PathMemberInfoEventArgs eventArgs)
{
memberInfo = eventArgs.MemberInfo;
if (eventArgs.MemberKind == PathMemberKind.Event)
{
//need to exit!!!
eventArgs.Action = PathWalkAction.Stop;
return;
}
};
if (pathWalker.TryWalkPropertyPath(propertyType, path))
return memberInfo;
else
return null;
}
internal static object GetValue(MemberInfo memberInfo, object dataContext, string path)
{
if (memberInfo == null)
throw new ArgumentNullException("memberInfo");
if (dataContext == null)
throw new ArgumentNullException("dataContext");
if (path == null)
path = string.Empty;
if (string.IsNullOrEmpty(path))
return null;
object targetObject = dataContext;
System.Type memberType = dataContext.GetType();
PathWalker pathWalker = new PathWalker();
pathWalker.MemberFound += delegate(object sender, PathMemberInfoEventArgs eventArgs)
{
if (targetObject == null)
{
eventArgs.Action = PathWalkAction.Cancel;
return;
}
switch (eventArgs.MemberKind)
{
case PathMemberKind.Field:
memberType = (eventArgs.MemberInfo as FieldInfo).FieldType;
targetObject = (eventArgs.MemberInfo as FieldInfo).GetValue(targetObject);
break;
case PathMemberKind.Event:
EventInfo evt = eventArgs.MemberInfo as EventInfo;
memberType = evt.EventHandlerType;
// GetValue() returns the actual value of the property. We need the Bind object here.
// Find out if there is a matching dependency property and get the value throw the DP.
DependencyObject dependencyObject = targetObject as DependencyObject;
DependencyProperty dependencyProperty = DependencyProperty.FromName(evt.Name, dependencyObject.GetType());
if (dependencyProperty != null && dependencyObject != null)
{
if (dependencyObject.IsBindingSet(dependencyProperty))
targetObject = dependencyObject.GetBinding(dependencyProperty);
else
targetObject = dependencyObject.GetHandler(dependencyProperty);
}
else
targetObject = null;
//
eventArgs.Action = PathWalkAction.Stop;
break;
case PathMemberKind.Property:
memberType = (eventArgs.MemberInfo as PropertyInfo).PropertyType;
if (!(eventArgs.MemberInfo as PropertyInfo).CanRead)
{
eventArgs.Action = PathWalkAction.Cancel;
return;
}
targetObject = (eventArgs.MemberInfo as PropertyInfo).GetValue(targetObject, null);
break;
case PathMemberKind.IndexedProperty:
memberType = (eventArgs.MemberInfo as PropertyInfo).PropertyType;
if (!(eventArgs.MemberInfo as PropertyInfo).CanRead)
{
eventArgs.Action = PathWalkAction.Cancel;
return;
}
targetObject = (eventArgs.MemberInfo as PropertyInfo).GetValue(targetObject, eventArgs.IndexParameters);
break;
case PathMemberKind.Index://
memberType = (eventArgs.MemberInfo as PropertyInfo).PropertyType;
targetObject = (eventArgs.MemberInfo as PropertyInfo).GetValue(targetObject, BindingFlags.GetProperty, null, eventArgs.IndexParameters, CultureInfo.InvariantCulture);
break;
}
if (targetObject == null)
{
if (eventArgs.LastMemberInThePath)
{
eventArgs.Action = PathWalkAction.Cancel;
return;
}
else
{
throw new InvalidOperationException(SR.GetString(SR.Error_BindPathNullValue, eventArgs.Path));
}
}
};
if (pathWalker.TryWalkPropertyPath(memberType, path))
{
//success
return ((targetObject != dataContext) ? targetObject : null);
}
else
{
//failure
return null;
}
}
internal static ValidationError ValidateTypesInPath(Type srcType, string path)
{
ValidationError error = null;
if (srcType == null)
throw new ArgumentNullException("srcType");
if (path == null)
throw new ArgumentNullException("path");
if (path.Length == 0)
throw new ArgumentException(SR.GetString(SR.Error_EmptyPathValue), "path");
Debug.Assert(WorkflowCompilationContext.Current != null, "Can't have checkTypes set to true without a context in scope");
IList<AuthorizedType> authorizedTypes = WorkflowCompilationContext.Current.GetAuthorizedTypes();
if (authorizedTypes == null)
{
return new ValidationError(SR.GetString(SR.Error_ConfigFileMissingOrInvalid), ErrorNumbers.Error_ConfigFileMissingOrInvalid);
}
Type propertyType = srcType;
MemberInfo memberInfo = null;
PathWalker pathWalker = new PathWalker();
pathWalker.MemberFound += delegate(object sender, PathMemberInfoEventArgs eventArgs)
{
Type memberType = null;
memberInfo = eventArgs.MemberInfo;
if (memberInfo is FieldInfo)
memberType = ((FieldInfo)memberInfo).FieldType;
if (memberInfo is PropertyInfo)
memberType = ((PropertyInfo)memberInfo).PropertyType;
if (memberType != null && !SafeType(authorizedTypes, memberType))
{
error = new ValidationError(SR.GetString(SR.Error_TypeNotAuthorized, memberType), ErrorNumbers.Error_TypeNotAuthorized);
eventArgs.Action = PathWalkAction.Stop;
return;
}
};
pathWalker.TryWalkPropertyPath(propertyType, path);
return error;
}
internal static void SetValue(object dataContext, string path, object value)
{
if (dataContext == null)
throw new ArgumentNullException("dataContext");
if (string.IsNullOrEmpty(path))
throw new ArgumentNullException("path");
object parentObj = null;
object obj = dataContext;
object[] args = null;
MemberInfo memberInfo = null;
PathWalker pathWalker = new PathWalker();
pathWalker.MemberFound += delegate(object sender, PathMemberInfoEventArgs eventArgs)
{
//
if (obj == null)
{
eventArgs.Action = PathWalkAction.Cancel;
return;
}
parentObj = obj;
memberInfo = eventArgs.MemberInfo;
switch (eventArgs.MemberKind)
{
case PathMemberKind.Field:
obj = (eventArgs.MemberInfo as FieldInfo).GetValue(parentObj);
args = null;
break;
case PathMemberKind.Event:
//
eventArgs.Action = PathWalkAction.Cancel; //set value is not supported on events
return;
case PathMemberKind.Property:
obj = (eventArgs.MemberInfo as PropertyInfo).GetValue(parentObj, null);
args = null;
break;
case PathMemberKind.IndexedProperty:
case PathMemberKind.Index:
obj = (eventArgs.MemberInfo as PropertyInfo).GetValue(parentObj, eventArgs.IndexParameters);
args = eventArgs.IndexParameters;
break;
}
};
if (pathWalker.TryWalkPropertyPath(dataContext.GetType(), path))
{
//at this point the 'obj' holds the old value, we will be changing it to 'value'
//success
if (memberInfo is FieldInfo)
{
(memberInfo as FieldInfo).SetValue(parentObj, value);
}
else if (memberInfo is PropertyInfo)
{
if ((memberInfo as PropertyInfo).CanWrite)
(memberInfo as PropertyInfo).SetValue(parentObj, value, args);
else
throw new InvalidOperationException(SR.GetString(SR.Error_ReadOnlyField, memberInfo.Name));
}
}
}
internal static object ResolveActivityPath(Activity refActivity, string path)
{
if (refActivity == null)
throw new ArgumentNullException("refActivity");
if (path == null)
throw new ArgumentNullException("path");
if (path.Length == 0)
throw new ArgumentException(SR.GetString(SR.Error_EmptyPathValue), "path");
object value = refActivity;
BindRecursionContext recursionContext = new BindRecursionContext();
PathWalker pathWalker = new PathWalker();
pathWalker.MemberFound += delegate(object sender, PathMemberInfoEventArgs eventArgs)
{
// If value is null, we don't want to use GetValue on the MemberInfo
if (value == null)
{
eventArgs.Action = PathWalkAction.Cancel; //need to cancel the walk with the failure return result
return;
}
switch (eventArgs.MemberKind)
{
case PathMemberKind.Field:
try
{
value = (eventArgs.MemberInfo as FieldInfo).GetValue(value);
}
catch (Exception exception)
{
//in some cases the value might not be there yet (e.g. validation vs. runtime)
value = null;
eventArgs.Action = PathWalkAction.Cancel;
//we should throw only if we are at the runtime
if (!refActivity.DesignMode)
{
TargetInvocationException targetInvocationException = exception as TargetInvocationException;
throw (targetInvocationException != null) ? targetInvocationException.InnerException : exception;
}
}
break;
case PathMemberKind.Event:
EventInfo evt = eventArgs.MemberInfo as EventInfo;
// GetValue() returns the actual value of the property. We need the Bind object here.
// Find out if there is a matching dependency property and get the value throw the DP.
DependencyProperty eventDependencyProperty = DependencyProperty.FromName(evt.Name, value.GetType());
if (eventDependencyProperty != null && value is DependencyObject)
{
if ((value as DependencyObject).IsBindingSet(eventDependencyProperty))
value = (value as DependencyObject).GetBinding(eventDependencyProperty);
else
value = (value as DependencyObject).GetHandler(eventDependencyProperty);
}
break;
case PathMemberKind.Property:
if (!(eventArgs.MemberInfo as PropertyInfo).CanRead)
{
eventArgs.Action = PathWalkAction.Cancel;
return;
}
// GetValue() returns the actual value of the property. We need the Bind object here.
// Find out if there is a matching dependency property and get the value throw the DP.
DependencyProperty dependencyProperty = DependencyProperty.FromName(eventArgs.MemberInfo.Name, value.GetType());
if (dependencyProperty != null && value is DependencyObject && (value as DependencyObject).IsBindingSet(dependencyProperty))
value = (value as DependencyObject).GetBinding(dependencyProperty);
else
try
{
value = (eventArgs.MemberInfo as PropertyInfo).GetValue(value, null);
}
catch (Exception exception)
{
//property getter function might throw at design time, validation should not fail bacause of that
value = null;
eventArgs.Action = PathWalkAction.Cancel;
//we should throw only if we are at the runtime
if (!refActivity.DesignMode)
{
TargetInvocationException targetInvocationException = exception as TargetInvocationException;
throw (targetInvocationException != null) ? targetInvocationException.InnerException : exception;
}
}
break;
case PathMemberKind.IndexedProperty:
case PathMemberKind.Index:
try
{
value = (eventArgs.MemberInfo as PropertyInfo).GetValue(value, BindingFlags.GetProperty, null, eventArgs.IndexParameters, CultureInfo.InvariantCulture);
}
catch (Exception exception)
{
//in some cases the value might not be there yet - e.g. array or dictionary is populated at runtime only (validation vs. runtime)
value = null;
eventArgs.Action = PathWalkAction.Cancel;
//we should throw only if we are at the runtime
if (!refActivity.DesignMode)
{
TargetInvocationException targetInvocationException = exception as TargetInvocationException;
throw (targetInvocationException != null) ? targetInvocationException.InnerException : exception;
}
}
break;
}
//need to unwrap the activity bind if we get one - to proceed with the actual field/property/delegate
//do not unwrap if the property/field is itself of type ActivityBind
//we should not unwrap the latest ActivityBind though - only intermediate ones
//avoid circular reference problems with the BindRecursionContext
if (value is ActivityBind && !eventArgs.LastMemberInThePath && GetMemberType(eventArgs.MemberInfo) != typeof(ActivityBind))
{
while (value is ActivityBind)
{
ActivityBind activityBind = value as ActivityBind;
if (recursionContext.Contains(refActivity, activityBind))
throw new InvalidOperationException(SR.GetString(SR.Bind_ActivityDataSourceRecursionDetected));
recursionContext.Add(refActivity, activityBind);
value = activityBind.GetRuntimeValue(refActivity);
}
}
};
if (pathWalker.TryWalkPropertyPath(refActivity.GetType(), path))
return value;
else
return null;
}
internal static bool CreateField(ITypeDescriptorContext context, ActivityBind activityBind, bool throwOnError)
{
if (!string.IsNullOrEmpty(activityBind.Path))
{
Type toType = PropertyDescriptorUtils.GetBaseType(context.PropertyDescriptor, context.Instance, context);
Activity component = PropertyDescriptorUtils.GetComponent(context) as Activity;
if ((component != null) && (toType != null))
{
component = Helpers.ParseActivityForBind(component, activityBind.Name);
if (component == Helpers.GetRootActivity(component))
{
bool ignoreCase = CompilerHelpers.GetSupportedLanguage(context) == SupportedLanguages.VB;
Type dataSourceClass = Helpers.GetDataSourceClass(component, context);
if (dataSourceClass != null)
{
string path = activityBind.Path;
int length = path.IndexOfAny(new char[] { '.', '/', '[' });
if (length != -1)
{
path = path.Substring(0, length);
}
MemberInfo info = FindMatchingMember(path, dataSourceClass, ignoreCase);
if (info != null)
{
Type fromType = null;
bool isPrivate = false;
if (info is FieldInfo)
{
isPrivate = ((FieldInfo) info).IsPrivate;
fromType = ((FieldInfo) info).FieldType;
}
else if (info is PropertyInfo)
{
MethodInfo getMethod = ((PropertyInfo) info).GetGetMethod();
MethodInfo setMethod = ((PropertyInfo) info).GetSetMethod();
isPrivate = ((getMethod != null) && getMethod.IsPrivate) || ((setMethod != null) && setMethod.IsPrivate);
}
else if (info is MethodInfo)
{
isPrivate = ((MethodInfo) info).IsPrivate;
}
if (length != -1)
{
PathWalker walker = new PathWalker();
PathMemberInfoEventArgs finalEventArgs = null;
walker.MemberFound = (EventHandler<PathMemberInfoEventArgs>) Delegate.Combine(walker.MemberFound, delegate (object sender, PathMemberInfoEventArgs eventArgs) {
finalEventArgs = eventArgs;
});
if (!walker.TryWalkPropertyPath(dataSourceClass, activityBind.Path))
{
if (throwOnError)
{
throw new InvalidOperationException(SR.GetString("Error_MemberWithSameNameExists", new object[] { activityBind.Path, dataSourceClass.FullName }));
}
return false;
}
fromType = BindHelpers.GetMemberType(finalEventArgs.MemberInfo);
}
if (((info.DeclaringType == dataSourceClass) || !isPrivate) && ((info is FieldInfo) && TypeProvider.IsAssignable(toType, fromType)))
{
return true;
}
if (throwOnError)
{
throw new InvalidOperationException(SR.GetString("Error_MemberWithSameNameExists", new object[] { activityBind.Path, dataSourceClass.FullName }));
}
return false;
}
Activity activity2 = null;
if (string.Compare(component.Name, path, ignoreCase ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal) == 0)
{
activity2 = component;
}
else if ((component is CompositeActivity) && (component is CompositeActivity))
{
foreach (Activity activity3 in Helpers.GetAllNestedActivities(component as CompositeActivity))
{
if (string.Compare(activity3.Name, path, ignoreCase ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal) == 0)
{
activity2 = activity3;
}
}
}
if (activity2 != null)
{
if (TypeProvider.IsAssignable(toType, activity2.GetType()))
{
return true;
}
if (throwOnError)
{
throw new InvalidOperationException(SR.GetString("Error_MemberWithSameNameExists", new object[] { activityBind.Path, dataSourceClass.FullName }));
}
return false;
}
IMemberCreationService service = context.GetService(typeof(IMemberCreationService)) as IMemberCreationService;
if (service != null)
{
IDesignerHost host = context.GetService(typeof(IDesignerHost)) as IDesignerHost;
if (host != null)
{
service.CreateField(host.RootComponentClassName, activityBind.Path, toType, null, MemberAttributes.Public, null, false);
return true;
}
if (throwOnError)
{
throw new InvalidOperationException(SR.GetString("General_MissingService", new object[] { typeof(IDesignerHost).FullName }));
}
}
else if (throwOnError)
{
throw new InvalidOperationException(SR.GetString("General_MissingService", new object[] { typeof(IMemberCreationService).FullName }));
}
}
}
}
else
{
if ((component == null) && throwOnError)
{
throw new InvalidOperationException(SR.GetString("Error_InvalidActivityIdentifier", new object[] { activityBind.Name }));
}
if ((toType == null) && throwOnError)
{
throw new InvalidOperationException(SR.GetString("Error_PropertyTypeNotDefined", new object[] { context.PropertyDescriptor.Name, typeof(ActivityBind).Name, typeof(IDynamicPropertyTypeProvider).Name }));
}
}
}
return false;
}
//given user typed path, find all properties along it and return them in the list
private List<PathInfo> ParseStringPath(Type activityType, string path)
{
if (string.IsNullOrEmpty(path))
return null;
List<PathInfo> pathInfoList = new List<PathInfo>();
PathWalker pathWalker = new PathWalker();
PathMemberInfoEventArgs finalEventArgs = null;
PathErrorInfoEventArgs errorEventArgs = null;
pathWalker.MemberFound += delegate(object sender, PathMemberInfoEventArgs eventArgs)
{
finalEventArgs = eventArgs; //store the latest args
pathInfoList.Add(new PathInfo(eventArgs.Path, eventArgs.MemberInfo, BindHelpers.GetMemberType(eventArgs.MemberInfo)));
};
pathWalker.PathErrorFound += delegate(object sender, PathErrorInfoEventArgs eventArgs)
{
errorEventArgs = eventArgs; //store the error args
};
pathWalker.TryWalkPropertyPath(activityType, path);
return pathInfoList;
}
