Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Activities / Rules / Helpers.cs / 1305376 / Helpers.cs
// ---------------------------------------------------------------------------- // Copyright (C) 2006 Microsoft Corporation All Rights Reserved // --------------------------------------------------------------------------- #define CODE_ANALYSIS using System.CodeDom; using System.Collections; using System.ComponentModel.Design.Serialization; using System.Diagnostics.CodeAnalysis; using System.Globalization; using System.IO; using System.Workflow.ComponentModel; using System.Workflow.ComponentModel.Compiler; using System.Workflow.ComponentModel.Design; using System.Workflow.ComponentModel.Serialization; using System.Xml; using System.Reflection; using System.Diagnostics; using System.Workflow.Activities.Common; namespace System.Workflow.Activities.Rules { internal static class ConditionHelper { internal static Type GetContextType(ITypeProvider typeProvider, Activity currentActivity) { Type contextType = null; string className = String.Empty; Activity rootActivity = null; if (Helpers.IsActivityLocked(currentActivity)) { rootActivity = Helpers.GetDeclaringActivity(currentActivity); } else { rootActivity = Helpers.GetRootActivity(currentActivity); } if (rootActivity != null) { className = rootActivity.GetValue(WorkflowMarkupSerializer.XClassProperty) as string; if (!String.IsNullOrEmpty(className)) contextType = typeProvider.GetType(className, false); if (contextType == null) contextType = typeProvider.GetType(rootActivity.GetType().FullName); // If all else fails (likely, we don't have a type provider), it's the root activity type. if (contextType == null) contextType = rootActivity.GetType(); } return contextType; } ////// Is type a nullable value type (e.g. double?)? /// /// ///internal static bool IsNullableValueType(Type type) { return ((type.IsValueType) && (type.IsGenericType) && (type.GetGenericTypeDefinition().Equals(typeof(Nullable<>)))); } /// /// Is type a standard value type (i.e. not Nullable)? /// /// ///internal static bool IsNonNullableValueType(Type type) { return ((type.IsValueType) && (!type.IsGenericType) && (type != typeof(string))); } internal static object CloneObject(object original) { if (original == null) return null; if (original.GetType().IsValueType) return original; ICloneable cloneable = original as ICloneable; if (cloneable != null) return cloneable.Clone(); string message = string.Format(CultureInfo.CurrentCulture, Messages.NotCloneable, original.GetType().FullName); throw new NotSupportedException(message); } internal static void CloneUserData(CodeObject original, CodeObject result) { // clone UserData, if possible foreach (object key in original.UserData.Keys) { object newKey = CloneObject(key); object newValue = CloneObject(original.UserData[key]); result.UserData.Add(newKey, newValue); } } [SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes")] internal static RuleDefinitions Load_Rules_DT(IServiceProvider serviceProvider, DependencyObject activity) { RuleDefinitions rules = (RuleDefinitions)activity.GetValue(RuleDefinitions.RuleDefinitionsProperty); if (rules == null) { WorkflowDesignerLoader loader = (WorkflowDesignerLoader)serviceProvider.GetService(typeof(WorkflowDesignerLoader)); if (loader != null) { string rulesFileName = string.Empty; if (!string.IsNullOrEmpty(loader.FileName)) rulesFileName = Path.Combine(Path.GetDirectoryName(loader.FileName), Path.GetFileNameWithoutExtension(loader.FileName)); rulesFileName += ".rules"; try { using (TextReader ruleFileReader = loader.GetFileReader(rulesFileName)) { if (ruleFileReader == null) { rules = new RuleDefinitions(); } else { using (XmlReader xmlReader = XmlReader.Create(ruleFileReader)) rules = new WorkflowMarkupSerializer().Deserialize(xmlReader) as RuleDefinitions; } } } catch (Exception) { rules = new RuleDefinitions(); // } } activity.SetValue(RuleDefinitions.RuleDefinitionsProperty, rules); } return rules; } internal static void Flush_Rules_DT(IServiceProvider serviceProvider, Activity activity) { RuleDefinitions rules = (RuleDefinitions)activity.GetValue(RuleDefinitions.RuleDefinitionsProperty); if (rules != null) { WorkflowDesignerLoader loader = (WorkflowDesignerLoader)serviceProvider.GetService(typeof(WorkflowDesignerLoader)); if (loader != null) { string rulesFileName = string.Empty; if (!string.IsNullOrEmpty(loader.FileName)) rulesFileName = Path.Combine(Path.GetDirectoryName(loader.FileName), Path.GetFileNameWithoutExtension(loader.FileName)); rulesFileName += ".rules"; using (TextWriter ruleFileWriter = loader.GetFileWriter(rulesFileName)) { if (ruleFileWriter != null) { using (XmlWriter xmlWriter = Helpers.CreateXmlWriter(ruleFileWriter)) { DesignerSerializationManager designerSerializationManager = new DesignerSerializationManager(serviceProvider); using (designerSerializationManager.CreateSession()) { new WorkflowMarkupSerializer().Serialize(designerSerializationManager, xmlWriter, rules); } } } } } } } internal static RuleDefinitions Load_Rules_RT(Activity declaringActivity) { RuleDefinitions rules = declaringActivity.GetValue(RuleDefinitions.RuleDefinitionsProperty) as RuleDefinitions; if (rules == null) { rules = ConditionHelper.GetRuleDefinitionsFromManifest(declaringActivity.GetType()); if (rules != null) declaringActivity.SetValue(RuleDefinitions.RuleDefinitionsProperty, rules); } return rules; } // To improve performance, cache the RuleDefinitions deserialized from // .rules resources keyed by the type of activity. static Hashtable cloneableOrNullRulesResources = new Hashtable(); // It is unfortunate, however, that cloning might not always succeed, we will keep them here. static Hashtable uncloneableRulesResources = new Hashtable(); internal static RuleDefinitions GetRuleDefinitionsFromManifest(Type workflowType) { if (workflowType == null) throw new ArgumentNullException("workflowType"); RuleDefinitions rules = null; if (cloneableOrNullRulesResources.ContainsKey(workflowType)) { rules = (RuleDefinitions)cloneableOrNullRulesResources[workflowType]; if (rules != null) { // This should always succeed, since it is coming out of the cloneable cache rules = rules.Clone(); } } else { string resourceName = workflowType.Name + ".rules"; Stream stream = workflowType.Module.Assembly.GetManifestResourceStream(workflowType, resourceName); // Try just the .rules file name. This is needed for wfc.exe compilation scenarios. if (stream == null) stream = workflowType.Module.Assembly.GetManifestResourceStream(resourceName); if (stream != null) { using (StreamReader reader = new StreamReader(stream)) { using (XmlReader xmlReader = XmlReader.Create(reader)) rules = new WorkflowMarkupSerializer().Deserialize(xmlReader) as RuleDefinitions; } } // Don't know yet whether 'rules' is cloneable, give it a try if (!uncloneableRulesResources.ContainsKey(workflowType)) { try { RuleDefinitions originalRules = rules; if (rules != null) { rules = rules.Clone(); } lock (cloneableOrNullRulesResources) { cloneableOrNullRulesResources[workflowType] = originalRules; } } catch (Exception) { lock(uncloneableRulesResources) { uncloneableRulesResources[workflowType] = null; } } } } return rules; } } internal static class EnumHelper { [SuppressMessage("Microsoft.Performance", "CA1803:AvoidCostlyCallsWherePossible")] public static Type GetUnderlyingType(Type type) { Type underlyingType = typeof(int); if (type.GetType().FullName.Equals("System.Workflow.ComponentModel.Compiler.DesignTimeType", StringComparison.Ordinal))// designTimeType = type as System.Workflow.ComponentModel.Compiler.DesignTimeType; { //this is a design time type, need to get the enum type data out of it MethodInfo methodInfo = type.GetType().GetMethod("GetEnumType"); Debug.Assert(methodInfo != null, "Missing GetEnumType method on the DesignTimeType!"); if (methodInfo != null) { Type result = methodInfo.Invoke(type, new object[0]) as Type; underlyingType = (result != null) ? result : underlyingType; } } else { underlyingType = Enum.GetUnderlyingType(type); } return underlyingType; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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