/// <summary>
/// Validates the inputs. Returns true if all of the UI controls contain valid values. Otherwise, returns false.
/// </summary>
/// <returns>true if all of the UI controls contain valid values. Otherwise, false.</returns>
public override bool ValidateInputs()
{
Logger.Instance.WriteMethodEntry();
try
{
// Use the controller to validate standard activity controls
// and return false if a problem was identified
if (!this.controller.ValidateInputs())
{
return false;
}
try
{
// Verify that the target lookup is valid
LookupEvaluator targetLookup = new LookupEvaluator(this.publicationTarget.Value);
if (!targetLookup.IsValidTarget)
{
this.controller.ValidationError = string.Format(CultureInfo.CurrentUICulture, ActivitySettings.TargetLookupValidationError, this.publicationTarget.Value);
return false;
}
}
catch (WorkflowActivityLibraryException ex)
{
// If an exception was thrown while attempting to parse lookups, report the error
this.controller.ValidationError = ex.Message;
return false;
}
// Verify that the supplied conflict filter is a valid XPath query
if (!ExpressionEvaluator.IsXPath(this.conflictFilter.Value))
{
this.controller.ValidationError = ActivitySettings.ConflictFilterValidationError;
return false;
}
// Verify that the supplied conflict filter contains the [//Value] lookup
if (!this.conflictFilter.Value.ToUpperInvariant().Contains("[//VALUE]"))
{
this.controller.ValidationError = ActivitySettings.ConflictFilterValueLookupValidationError;
return false;
}
ExpressionEvaluator evaluator = new ExpressionEvaluator();
if (this.queryLdap.Value)
{
// Loop through all active query listings and make sure they are valid
foreach (DefinitionListing query in this.ldapQueries.DefinitionListings.Where(query => query.Active))
{
// If a value is missing for key or query, the definition
// will be null and the listing fails validation
if (query.Definition == null)
{
this.controller.ValidationError = ActivitySettings.LdapQueryDefinitionValidationError;
return false;
}
// Make sure that the specified XPath filter is properly formatted
if (!query.Definition.Right.ToUpperInvariant().Contains("[//VALUE]"))
{
this.controller.ValidationError = ActivitySettings.LdapQueryDefinitionValueLookupValidationError;
return false;
}
// If it's an expression, make sure it's properly formatted
if (ExpressionEvaluator.IsExpression(query.Definition.Left))
{
try
{
evaluator.ParseExpression(query.Definition.Left);
}
catch (WorkflowActivityLibraryException ex)
{
this.controller.ValidationError = ex.Message;
return false;
}
}
}
}
// Count the active value expressions
int count = this.valueExpressions.DefinitionListings.Count(valueExpression => valueExpression.Active);
// Loop through all active update listings and make sure they are valid
int i = 1;
foreach (DefinitionListing valueExpression in this.valueExpressions.DefinitionListings.Where(valueExpression => valueExpression.Active))
{
if (string.IsNullOrEmpty(valueExpression.State.Left))
{
// If a value is missing for the expression, fail validation
this.controller.ValidationError = ActivitySettings.ValueExpressionValidationError;
return false;
}
// Attempt to parse the value expression
try
{
evaluator.ParseExpression(valueExpression.State.Left);
}
catch (WorkflowActivityLibraryException ex)
{
this.controller.ValidationError = ex.Message;
return false;
}
// Verify that the [//UniquenessKey] lookup is only present in the last value expression
bool containsKey = valueExpression.State.Left.ToUpperInvariant().Contains("[//UNIQUENESSKEY]");
if (i < count && containsKey)
{
this.controller.ValidationError = ActivitySettings.ValueExpressionUniquenessKeyValidationError;
return false;
}
if (i == count && !containsKey)
{
this.controller.ValidationError = ActivitySettings.ValueExpressionMissingUniquenessKeyValidationError;
return false;
}
i += 1;
}
try
{
if (!string.IsNullOrEmpty(this.activityExecutionCondition.Value))
{
evaluator.ParseExpression(this.activityExecutionCondition.Value);
// Verify that the activity execution condition resolves to a Boolean value
if (!evaluator.IsBooleanExpression(this.activityExecutionCondition.Value))
{
this.controller.ValidationError = ActivitySettings.ActivityExecutionConditionValidationError;
return false;
}
}
}
catch (WorkflowActivityLibraryException ex)
{
this.controller.ValidationError = ex.Message;
return false;
}
// If no errors were found, clear any validation error and return true
this.controller.ValidationError = string.Empty;
return true;
}
catch (Exception e)
{
Logger.Instance.ReportError(e);
throw;
}
finally
{
Logger.Instance.WriteMethodExit();
}
}
/// <summary>
/// Handles the ExecuteCode event of the Prepare CodeActivity.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
private void Prepare_ExecuteCode(object sender, EventArgs e)
{
Logger.Instance.WriteMethodEntry(EventIdentifier.ResolveLookupsPrepareExecuteCode);
try
{
// Get the parent workflow so we can use it to pull request target, requestor, etc.
// and access the workflow dictionary
SequentialWorkflow parentWorkflow;
if (!SequentialWorkflow.TryGetContainingWorkflow(this, out parentWorkflow))
{
throw Logger.Instance.ReportError(EventIdentifier.ResolveLookupsPrepareExecuteCodeUnableToGetParentWorkflowError, new InvalidOperationException(Messages.UnableToGetParentWorkflowError));
}
// Determine if the parent workflow is an authorization workflow running against a create request
// In this situation, lookups against target will fail because the resource does not yet exist.
// We will need to convert [//Target/...] to [//Delta/...] to facilitate resolution
// This behavior replicates FIM's native behavior
if (this.Request.CurrentRequest.Operation == OperationType.Create &&
this.Request.CurrentRequest.AuthorizationWorkflowInstances != null)
{
foreach (UniqueIdentifier ui in this.Request.CurrentRequest.AuthorizationWorkflowInstances)
{
Guid authZWorkflowInstanceId;
if (ui.TryGetGuid(out authZWorkflowInstanceId) && authZWorkflowInstanceId == this.WorkflowInstanceId)
{
this.authZCreate = true;
break;
}
}
}
foreach (string s in this.Lookups.Keys)
{
Logger.Instance.WriteVerbose(EventIdentifier.ResolveLookupsPrepareExecuteCode, "Constructing lookup evaluator for lookup: '{0}'.", s);
LookupEvaluator originalLookup = new LookupEvaluator(s);
LookupEvaluator resolvableLookup = new LookupEvaluator(s);
// There are certain conditions which will prompt the activity to dynamically replace the original lookup with an alternate
// This is done at the paramater, swapping [//Effective/...] with [//Delta/...] or [//Target/...], for example
if (this.authZCreate && (originalLookup.Parameter == LookupParameter.Target || originalLookup.Parameter == LookupParameter.Effective))
{
Logger.Instance.WriteVerbose(EventIdentifier.ResolveLookupsPrepareExecuteCode, "The lookup '{0}' will be processed as [//Delta] lookup.", s);
// When resolving a [//Target/...] or [//Effective/...] lookup during authZ on a create request,
// we will always pull the value from the request delta because the target resource will not yet be available for read
string lookupString = s.Replace(string.Format(CultureInfo.InvariantCulture, "[//{0}/", s.Substring(3, originalLookup.Parameter.ToString().Length)), string.Format(CultureInfo.InvariantCulture, "[//{0}/", LookupParameter.Delta));
resolvableLookup = new LookupEvaluator(lookupString);
}
else if (originalLookup.Parameter == LookupParameter.Effective)
{
// When resolving a [//Effective/...] lookup, we need to determine if we should resolve against the request delta or the target resource
// If the attribute tied to the Effective parameter exists in the request parameters, the associated value will always supersede the
// attribute value on the target resource
bool useDelta = false;
if (originalLookup.Components.Count > 1)
{
ReadOnlyCollection<CreateRequestParameter> requestParameters = this.Request.CurrentRequest.ParseParameters<CreateRequestParameter>();
var query = from p in requestParameters where p.PropertyName.Equals(originalLookup.Components[1], StringComparison.OrdinalIgnoreCase) select p.PropertyName;
if (query.Any())
{
useDelta = true;
Logger.Instance.WriteVerbose(EventIdentifier.ResolveLookupsPrepareExecuteCode, "The [//Effective] lookup '{0}' will be processed as [//Delta] lookup.", s);
}
}
// Either replace [//Effective/...] with [//Delta/...] or [//Target/...] to facilitate resolution
// The activity will look for this lookup when resolving the original effective lookup
string lookupString = s.Replace(string.Format(CultureInfo.InvariantCulture, "[//{0}/", s.Substring(3, originalLookup.Parameter.ToString().Length)), useDelta ? string.Format(CultureInfo.InvariantCulture, "[//{0}/", LookupParameter.Delta) : string.Format(CultureInfo.InvariantCulture, "[//{0}/", LookupParameter.Target));
resolvableLookup = new LookupEvaluator(lookupString);
}
// Add the lookup parameter to the list of parameters for the activity so we know which resolutions are required
// Also establish a new entry in the values dictionary
// If the resolvable lookup is different than the original, add the pair to the alternates dictionary so we can find it later during resolution
if (!this.parameters.Contains(resolvableLookup.Parameter))
{
this.parameters.Add(resolvableLookup.Parameter);
}
if (!this.values.ContainsKey(resolvableLookup.Lookup))
{
this.values.Add(resolvableLookup.Lookup, new List<object>());
}
if (originalLookup.Lookup != resolvableLookup.Lookup)
{
this.alternateLookups.Add(originalLookup.Lookup, resolvableLookup.Lookup);
}
// Add each of the lookup's reads to the read dictionary which represents all lookups
// This single dictionary will ensure the minimum number of reads are performed
foreach (string key in resolvableLookup.Reads.Keys)
{
if (!this.reads.ContainsKey(key))
{
this.reads.Add(key, new List<string> { resolvableLookup.Reads[key] });
}
else if (!this.reads[key].Contains(resolvableLookup.Reads[key]))
{
this.reads[key].Add(resolvableLookup.Reads[key]);
}
}
// If resolving a [//WorkflowData/...] lookup, publish the value of the specified
// workflow dictionary key to the resources or values dictionary
// Make sure we only do this once for each workflow dictionary key because the publish method will stack values if it's executed more than once
if (resolvableLookup.Parameter == LookupParameter.WorkflowData &&
resolvableLookup.Components.Count > 1 &&
parentWorkflow.WorkflowDictionary.ContainsKey(resolvableLookup.Components[1]) &&
parentWorkflow.WorkflowDictionary[resolvableLookup.Components[1]] != null &&
!this.values.ContainsKey(string.Format(CultureInfo.InvariantCulture, "{0}/{1}", LookupParameter.WorkflowData, resolvableLookup.Components[1])))
{
this.Publish(string.Format(CultureInfo.InvariantCulture, "{0}/{1}", LookupParameter.WorkflowData, resolvableLookup.Components[1]), parentWorkflow.WorkflowDictionary[resolvableLookup.Components[1]]);
}
}
// If we have reads, add the keys of the read dictionary to the for each loop which will perform them
if (this.reads.Count > 0)
{
this.ForEachRead.InitialChildData = this.reads.Keys.ToArray();
}
// Publish Request, Requestor, and Target to the resource and values dictionary
// regardless of lookup parameter
this.Publish(LookupParameter.Request.ToString(), parentWorkflow.RequestId);
this.Publish(LookupParameter.Requestor.ToString(), parentWorkflow.ActorId);
if (this.parameters.Contains(LookupParameter.Target))
{
this.Publish(LookupParameter.Target.ToString(), parentWorkflow.TargetId);
}
// Publish the supplied value for [//Value]
if (this.parameters.Contains(LookupParameter.Value))
{
this.Publish(LookupParameter.Value.ToString(), this.Value);
}
// Resolve lookups associated with the [//Delta/...] parameter
if (this.parameters.Contains(LookupParameter.Delta))
{
if (this.Request.CurrentRequest.Operation != OperationType.SystemEvent)
{
this.PublishRequestDelta(this.Request.CurrentRequest, false);
}
}
// If necessary, add the supplied query results to the resource dictionary
// to support resolution of [//Queries/...] lookups
if (this.parameters.Contains(LookupParameter.Queries))
{
if (this.QueryResults != null)
{
foreach (string query in this.QueryResults.Keys)
{
this.Publish(string.Format(CultureInfo.InvariantCulture, "{0}/{1}", LookupParameter.Queries, query), this.QueryResults[query]);
}
}
else
{
Logger.Instance.WriteVerbose(EventIdentifier.ResolveLookupsPrepareExecuteCode, "The [//Queries/...] lookup(s) don't have any supplied results.");
}
}
// Preemptively build the XPath filter which identifies approvals associated with the request
// The activity will only be used if we are resolving a [//Approvers/...] lookup
this.FindApprovals.XPathFilter = string.Format(CultureInfo.InvariantCulture, "/Approval[Request = '{0}']", parentWorkflow.RequestId);
}
finally
{
Logger.Instance.WriteMethodExit(EventIdentifier.ResolveLookupsPrepareExecuteCode);
}
}
/// <summary>
/// Validates the inputs. Returns true if all of the UI controls contain valid values. Otherwise, returns false.
/// </summary>
/// <returns>true if all of the UI controls contain valid values. Otherwise, false.</returns>
public override bool ValidateInputs()
{
Logger.Instance.WriteMethodEntry();
try
{
// Use the controller to validate standard activity controls
// and return false if a problem was identified
if (!this.controller.ValidateInputs())
{
return false;
}
ExpressionEvaluator evaluator = new ExpressionEvaluator();
// Verify that the resource type is valid
if (!Regex.Match(this.resourceType.Value, RegexPattern).Success)
{
this.controller.ValidationError = string.Format(CultureInfo.CurrentUICulture, ActivitySettings.ResourceTypeValidationError, this.resourceType.Value);
return false;
}
if (this.advanced.Value)
{
if (this.queryResources.Value)
{
// Loop through all active query listings and make sure they are valid
foreach (DefinitionListing query in this.queries.DefinitionListings)
{
if (query.Active)
{
// If a value is missing for key or query, the definition
// will be null and the listing fails validation
if (query.Definition == null)
{
this.controller.ValidationError = ActivitySettings.QueryDefinitionValidationError;
return false;
}
// Make sure that the specified query key is properly formatted
if (!Regex.Match(query.Definition.Left, RegexPattern).Success)
{
this.controller.ValidationError = string.Format(CultureInfo.CurrentUICulture, ActivitySettings.QueryDefintionLeftValidationError, query.Definition.Left);
return false;
}
// Make sure that the specified XPath filter is properly formatted
if (!ExpressionEvaluator.IsXPath(query.Definition.Right))
{
this.controller.ValidationError = string.Format(CultureInfo.CurrentUICulture, ActivitySettings.QueryDefintionRightValidationError, query.Definition.Left);
return false;
}
}
}
}
try
{
if (!string.IsNullOrEmpty(this.activityExecutionCondition.Value))
{
evaluator.ParseExpression(this.activityExecutionCondition.Value);
// Verify that the activity execution condition resolves to a Boolean value
if (!evaluator.IsBooleanExpression(this.activityExecutionCondition.Value))
{
this.controller.ValidationError = ActivitySettings.ActivityExecutionConditionValidationError;
return false;
}
}
if (!string.IsNullOrEmpty(this.iteration.Value))
{
evaluator.ParseExpression(this.iteration.Value);
}
if (GetActorType(this.actorType.Value) == ActorType.Resolve)
{
evaluator.ParseExpression(this.actorString.Value);
}
// Verify that the supplied conflict filter is a valid XPath query, if necessary
if (this.checkForConflict.Value && !ExpressionEvaluator.IsXPath(this.conflictFilter.Value))
{
this.controller.ValidationError = ActivitySettings.ConflictResourceSearchFilterValidationError;
return false;
}
// If necessary, parse the created resource ID target lookup to ensure its validity
if (!string.IsNullOrEmpty(this.createdResourceIdTarget.Value))
{
LookupEvaluator createdTargetLookup = new LookupEvaluator(this.createdResourceIdTarget.Value);
if (!createdTargetLookup.IsValidTarget)
{
this.controller.ValidationError = string.Format(CultureInfo.CurrentUICulture, ActivitySettings.TargetLookupValidationError, this.createdResourceIdTarget.Value);
return false;
}
}
// If necessary, parse the conflicting resource ID target lookup to ensure its validity
if (this.checkForConflict.Value && !string.IsNullOrEmpty(this.conflictingResourceIdTarget.Value))
{
LookupEvaluator conflictingTargetLookup = new LookupEvaluator(this.conflictingResourceIdTarget.Value);
if (!conflictingTargetLookup.IsValidTarget)
{
this.controller.ValidationError = string.Format(CultureInfo.CurrentUICulture, ActivitySettings.TargetLookupValidationError, this.conflictingResourceIdTarget.Value);
return false;
}
}
}
catch (WorkflowActivityLibraryException ex)
{
// If an exception was thrown while attempting to parse lookups, report the error
this.controller.ValidationError = ex.Message;
return false;
}
if (this.applyAuthorizationPolicy.Value && GetActorType(this.actorType.Value) == ActorType.Service)
{
this.controller.ValidationError = ActivitySettings.RequestActorValidationError;
return false;
}
}
// Loop through all active definition listings and make sure they are valid
foreach (DefinitionListing listing in this.attributes.DefinitionListings)
{
if (!listing.Active)
{
continue;
}
if (listing.Definition == null)
{
// If a value is missing for source or target, the definition
// will be null and the listing fails validation
// Because the activity allows for the creation of a resource without any attributes,
// we need to check if this is the only active listing for the form and, if so,
// verify that all fields have been left blank before failing validation
int countActive = this.attributes.DefinitionListings.Count(l => l.Active);
if (countActive != 1 ||
!string.IsNullOrEmpty(listing.State.Left) ||
!string.IsNullOrEmpty(listing.State.Right))
{
this.controller.ValidationError = ActivitySettings.AttributeDefinitionValidationError;
return false;
}
}
else
{
// Attempt to parse the source expression and fail validation
// if an exception is thrown by the expression evaluator
try
{
evaluator.ParseExpression(listing.Definition.Left);
}
catch (WorkflowActivityLibraryException ex)
{
this.controller.ValidationError = ex.Message;
return false;
}
ParameterType targetType = ParameterType.String;
try
{
targetType = ExpressionEvaluator.DetermineParameterType(listing.Definition.Right, true);
}
catch (WorkflowActivityLibraryException)
{
}
// Target variables are valid
// For anything else, make sure that the target attribute matches the regular
// expression for FIM attributes
if (targetType != ParameterType.Variable)
{
if (!Regex.Match(listing.Definition.Right, RegexPattern).Success)
{
this.controller.ValidationError = string.Format(CultureInfo.CurrentUICulture, ActivitySettings.TargetValidationError, listing.Definition.Right);
return false;
}
}
}
}
// Verify that no [//Query/...] or [//Value/...] expressions exist
// if the query resources or iteration options are not enabled, respectively
bool containsQueryExpressions = false;
bool containsValueExpressions = false;
foreach (LookupEvaluator lookup in evaluator.LookupCache.Keys.Select(key => new LookupEvaluator(key)))
{
if (lookup.Parameter == LookupParameter.Queries)
{
containsQueryExpressions = true;
}
if (lookup.Parameter == LookupParameter.Value)
{
containsValueExpressions = true;
}
}
if (!this.queryResources.Value && containsQueryExpressions)
{
this.controller.ValidationError = ActivitySettings.QueryResourcesValidationError;
return false;
}
if (string.IsNullOrEmpty(this.iteration.Value) && containsValueExpressions)
{
this.controller.ValidationError = ActivitySettings.IterationValidationError;
return false;
}
// If no errors were found, clear any validation error and return true
this.controller.ValidationError = string.Empty;
return true;
}
catch (Exception e)
{
Logger.Instance.ReportError(e);
throw;
}
finally
{
Logger.Instance.WriteMethodExit();
}
}
/// <summary>
/// Validates the inputs. Returns true if all of the UI controls contain valid values. Otherwise, returns false.
/// </summary>
/// <returns>true if all of the UI controls contain valid values. Otherwise, false.</returns>
public override bool ValidateInputs()
{
Logger.Instance.WriteMethodEntry();
try
{
// Use the controller to validate standard activity controls
// and return false if a problem was identified
if (!this.controller.ValidateInputs())
{
return false;
}
ExpressionEvaluator evaluator = new ExpressionEvaluator();
if (this.advanced.Value)
{
if (this.queryResources.Value)
{
// Loop through all active query listings and make sure they are valid
foreach (DefinitionListing query in this.queries.DefinitionListings.Where(query => query.Active))
{
// If a value is missing for key or query, the definition
// will be null and the listing fails validation
if (query.Definition == null)
{
this.controller.ValidationError = ActivitySettings.QueryDefinitionValidationError;
return false;
}
// Make sure that the specified query key is properly formatted
if (!Regex.Match(query.Definition.Left, RegexPattern).Success)
{
this.controller.ValidationError = string.Format(CultureInfo.CurrentUICulture, ActivitySettings.QueryDefintionLeftValidationError, query.Definition.Left);
return false;
}
// Make sure that the specified XPath filter is properly formatted
if (!ExpressionEvaluator.IsXPath(query.Definition.Right))
{
this.controller.ValidationError = string.Format(CultureInfo.CurrentUICulture, ActivitySettings.QueryDefintionRightValidationError, query.Definition.Left);
return false;
}
}
}
try
{
if (!string.IsNullOrEmpty(this.activityExecutionCondition.Value))
{
evaluator.ParseExpression(this.activityExecutionCondition.Value);
// Verify that the activity execution condition resolves to a Boolean value
if (!evaluator.IsBooleanExpression(this.activityExecutionCondition.Value))
{
this.controller.ValidationError = ActivitySettings.ActivityExecutionConditionValidationError;
return false;
}
}
if (!string.IsNullOrEmpty(this.iteration.Value))
{
evaluator.ParseExpression(this.iteration.Value);
}
if (GetActorType(this.actorType.Value) == ActorType.Resolve)
{
evaluator.ParseExpression(this.actorString.Value);
}
}
catch (WorkflowActivityLibraryException ex)
{
this.controller.ValidationError = ex.Message;
return false;
}
if (this.applyAuthorizationPolicy.Value && GetActorType(this.actorType.Value) == ActorType.Service)
{
this.controller.ValidationError = ActivitySettings.RequestActorValidationError;
return false;
}
}
// Loop through all active update listings and make sure they are valid
foreach (DefinitionListing update in this.updates.DefinitionListings.Where(update => update.Active))
{
if (update.Definition == null)
{
// If a value is missing for source or target, the definition
// will be null and the listing fails validation
this.controller.ValidationError = ActivitySettings.UpdateDefinitionValidationError;
return false;
}
// Attempt to parse the source expression and target lookup or variable
// Fail validation if an exception is thrown for either
try
{
evaluator.ParseExpression(update.Definition.Left);
ParameterType targetType = ParameterType.Lookup;
try
{
targetType = ExpressionEvaluator.DetermineParameterType(update.Definition.Right);
}
catch (WorkflowActivityLibraryException)
{
}
// Target variables are valid
// Target lookups require further evaluation to determine if they represent a valid target
if (targetType != ParameterType.Variable)
{
LookupEvaluator lookup = new LookupEvaluator(update.Definition.Right);
if (!lookup.IsValidTarget)
{
this.controller.ValidationError = string.Format(CultureInfo.CurrentUICulture, ActivitySettings.TargetLookupValidationError, update.Definition.Right);
return false;
}
}
}
catch (WorkflowActivityLibraryException ex)
{
this.controller.ValidationError = ex.Message;
return false;
}
}
// Verify that no [//Query/...] or [//Value/...] expressions exist
// if the query resources or iteration options are not enabled, respectively
bool containsQueryExpressions = false;
bool containsValueExpressions = false;
foreach (LookupEvaluator lookup in evaluator.LookupCache.Keys.Select(key => new LookupEvaluator(key)))
{
if (lookup.Parameter == LookupParameter.Queries)
{
containsQueryExpressions = true;
}
if (lookup.Parameter == LookupParameter.Value)
{
containsValueExpressions = true;
}
}
if (!this.queryResources.Value && containsQueryExpressions)
{
this.controller.ValidationError = ActivitySettings.QueryResourcesValidationError;
return false;
}
if (string.IsNullOrEmpty(this.iteration.Value) && containsValueExpressions)
{
this.controller.ValidationError = ActivitySettings.IterationValidationError;
return false;
}
// If no errors were found, clear any validation error and return true
this.controller.ValidationError = string.Empty;
return true;
}
catch (Exception e)
{
Logger.Instance.ReportError(e);
throw;
}
finally
{
Logger.Instance.WriteMethodExit();
}
}
/// <summary>
/// Handles the ExecuteCode event of the BuildRequests CodeActivity.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
private void BuildRequests_ExecuteCode(object sender, EventArgs e)
{
Logger.Instance.WriteMethodEntry(EventIdentifier.UpdateLookupsBuildRequestsExecuteCode);
try
{
foreach (UpdateLookupDefinition update in this.UpdateLookupDefinitions)
{
LookupEvaluator lookup = new LookupEvaluator(update.TargetLookup);
if (lookup.TargetIsWorkflowDictionary)
{
// Get the parent workflow to facilitate access to the workflow dictionary
SequentialWorkflow parentWorkflow;
SequentialWorkflow.TryGetContainingWorkflow(this, out parentWorkflow);
// For simplicity, start by adding the key to the parent workflow dictionary so we can assume that its there
if (!parentWorkflow.WorkflowDictionary.ContainsKey(lookup.TargetAttribute))
{
parentWorkflow.WorkflowDictionary.Add(lookup.TargetAttribute, null);
}
if (update.Mode == UpdateMode.Modify)
{
parentWorkflow.WorkflowDictionary[lookup.TargetAttribute] = update.Value;
}
else if (update.Value != null)
{
// Use reflection to determine the expected List<> type based on the value
// Also get the Add and Remove methods for the list
Type listType = typeof(List<>).MakeGenericType(new Type[] { update.Value.GetType() });
MethodInfo add = listType.GetMethod("Add");
MethodInfo remove = listType.GetMethod("Remove");
switch (update.Mode)
{
case UpdateMode.Insert:
if (parentWorkflow.WorkflowDictionary[lookup.TargetAttribute] == null)
{
parentWorkflow.WorkflowDictionary[lookup.TargetAttribute] = update.Value;
}
else if (parentWorkflow.WorkflowDictionary[lookup.TargetAttribute].GetType() == update.Value.GetType())
{
// Single value, create a new instance of the appropriate List<> type
// and add both values: existing and new
object existingValue = parentWorkflow.WorkflowDictionary[lookup.TargetAttribute];
parentWorkflow.WorkflowDictionary[lookup.TargetAttribute] = Activator.CreateInstance(listType);
add.Invoke(parentWorkflow.WorkflowDictionary[lookup.TargetAttribute], new object[] { existingValue });
add.Invoke(parentWorkflow.WorkflowDictionary[lookup.TargetAttribute], new object[] { update.Value });
}
else if (parentWorkflow.WorkflowDictionary[lookup.TargetAttribute].GetType() == listType)
{
// The dictionary key is a list of the expected type, add the value
add.Invoke(parentWorkflow.WorkflowDictionary[lookup.TargetAttribute], new object[] { update.Value });
}
else
{
// We have a problem and need to report an error
throw Logger.Instance.ReportError(new WorkflowActivityLibraryException(Messages.UpdateLookup_InsertVariableError, update.Value.GetType(), lookup.TargetAttribute, parentWorkflow.WorkflowDictionary[lookup.TargetAttribute].GetType()));
}
break;
case UpdateMode.Remove:
if (parentWorkflow.WorkflowDictionary[lookup.TargetAttribute] == null)
{
// Do nothing
}
else if (parentWorkflow.WorkflowDictionary[lookup.TargetAttribute].Equals(update.Value))
{
// A single matching value exists, clear the variable
parentWorkflow.WorkflowDictionary[lookup.TargetAttribute] = null;
}
else if (parentWorkflow.WorkflowDictionary[lookup.TargetAttribute].GetType() == listType)
{
// The variable is a list of the expected type, attempt to remove the value
remove.Invoke(parentWorkflow.WorkflowDictionary[lookup.TargetAttribute], new object[] { update.Value });
// Check the count on the list to determine if we are down to a single value or have no value
// If so, adjust the value of the variable accordingly to eliminate the list
object listValue = null;
int i = 0;
foreach (object o in (IEnumerable)parentWorkflow.WorkflowDictionary[lookup.TargetAttribute])
{
i += 1;
listValue = o;
}
if (i <= 1)
{
parentWorkflow.WorkflowDictionary[lookup.TargetAttribute] = listValue;
}
}
break;
}
}
// If we ended up with a null value in the workflow dictionary key,
// remove the key to cleanup after ourselves
if (parentWorkflow.WorkflowDictionary[lookup.TargetAttribute] == null)
{
parentWorkflow.WorkflowDictionary.Remove(lookup.TargetAttribute);
}
}
else if (!string.IsNullOrEmpty(lookup.TargetResourceLookup) &&
this.TargetLookups.ContainsKey(lookup.TargetResourceLookup) &&
this.TargetLookups[lookup.TargetResourceLookup] != null)
{
// Based on the type of the resolved target lookup (should be Guid or List<Guid>)
// build the list of target resources for the update
List<Guid> targets = new List<Guid>();
if (this.TargetLookups[lookup.TargetResourceLookup] is Guid)
{
targets.Add((Guid)this.TargetLookups[lookup.TargetResourceLookup]);
}
else if (this.TargetLookups[lookup.TargetResourceLookup].GetType() == typeof(List<Guid>))
{
targets.AddRange((List<Guid>)this.TargetLookups[lookup.TargetResourceLookup]);
}
foreach (Guid target in targets)
{
// Add the target to the update requests dictionary, if it doesn't already exist,
// and add the new update request parameter
if (!this.PendingRequests.ContainsKey(target))
{
this.PendingRequests.Add(target, new List<UpdateRequestParameter>());
}
this.PendingRequests[target].Add(new UpdateRequestParameter(lookup.TargetAttribute, update.Mode, update.Value));
}
}
}
// If there are requests that need to be submitted to fulfill the updates,
// assign the list of targets to the for each loop which will evaluate each change
// to determine if they will result in changes
if (this.PendingRequests.Count > 0)
{
this.ForEachPending.InitialChildData = this.PendingRequests.Keys.ToList();
}
Logger.Instance.WriteVerbose(EventIdentifier.UpdateLookupsBuildRequestsExecuteCode, "The number of requests that need to be submitted to fulfill the updates: '{0}'.", this.PendingRequests.Count);
}
finally
{
Logger.Instance.WriteMethodExit(EventIdentifier.UpdateLookupsBuildRequestsExecuteCode);
}
}