Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Common / AuthoringOM / Design / IdentifierCreationService.cs / 1305376 / IdentifierCreationService.cs
namespace System.Workflow.ComponentModel.Design { using System; using System.IO; using System.Text; using System.CodeDom; using System.CodeDom.Compiler; using System.Reflection; using Microsoft.CSharp; using Microsoft.VisualBasic; using System.Collections; using System.Globalization; using System.ComponentModel; using System.Collections.Generic; using System.ComponentModel.Design; using System.ComponentModel.Design.Serialization; using System.Workflow; using System.Workflow.ComponentModel.Compiler; using System.Workflow.ComponentModel; using System.Workflow.ComponentModel.Design; using System.Workflow.ComponentModel.Serialization; using System.Collections.Specialized; internal sealed class IdentifierCreationService : IIdentifierCreationService { private IServiceProvider serviceProvider = null; private WorkflowDesignerLoader loader = null; private CodeDomProvider provider = null; internal IdentifierCreationService(IServiceProvider serviceProvider, WorkflowDesignerLoader loader) { this.serviceProvider = serviceProvider; this.loader = loader; } internal CodeDomProvider Provider { get { if (this.provider == null) { SupportedLanguages language = CompilerHelpers.GetSupportedLanguage(this.serviceProvider); if (language == SupportedLanguages.CSharp) this.provider = CompilerHelpers.CreateCodeProviderInstance(typeof(CSharpCodeProvider)); else this.provider = CompilerHelpers.CreateCodeProviderInstance(typeof(VBCodeProvider)); } return this.provider; } } #region IIdentifierCreationService void IIdentifierCreationService.ValidateIdentifier(Activity activity, string identifier) { if (identifier == null) throw new ArgumentNullException("identifier"); if (activity == null) throw new ArgumentNullException("activity"); if (activity.Name.ToLowerInvariant().Equals(identifier.ToLowerInvariant())) return; if (this.Provider != null) { SupportedLanguages language = CompilerHelpers.GetSupportedLanguage(this.serviceProvider); if (language == SupportedLanguages.CSharp && identifier.StartsWith("@", StringComparison.Ordinal) || language == SupportedLanguages.VB && identifier.StartsWith("[", StringComparison.Ordinal) && identifier.EndsWith("]", StringComparison.Ordinal) || !this.Provider.IsValidIdentifier(identifier)) { throw new Exception(SR.GetString(SR.Error_InvalidLanguageIdentifier, identifier)); } } StringDictionary identifiers = new StringDictionary(); CompositeActivity rootActivity = Helpers.GetRootActivity(activity) as CompositeActivity; if (rootActivity != null) { foreach (string existingIdentifier in Helpers.GetIdentifiersInCompositeActivity(rootActivity)) identifiers[existingIdentifier] = existingIdentifier; } Type customActivityType = GetRootActivityType(this.serviceProvider); if (customActivityType != null) { foreach (MemberInfo member in customActivityType.GetMembers(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance)) { Type memberType = null; if (member is FieldInfo) memberType = ((FieldInfo)member).FieldType; if (memberType == null || !typeof(Activity).IsAssignableFrom(memberType)) identifiers[member.Name] = member.Name; } } if (identifiers.ContainsKey(identifier)) throw new ArgumentException(SR.GetString(SR.DuplicateActivityIdentifier, identifier)); } ////// This method will ensure that the identifiers of the activities to be added to the parent activity /// are unique within the scope of the parent activity. /// /// THis activity is the parent activity which the child activities are being added /// void IIdentifierCreationService.EnsureUniqueIdentifiers(CompositeActivity parentActivity, ICollection childActivities) { if (parentActivity == null) throw new ArgumentNullException("parentActivity"); if (childActivities == null) throw new ArgumentNullException("childActivities"); ArrayList allActivities = new ArrayList(); Queue activities = new Queue(childActivities); while (activities.Count > 0) { Activity activity = (Activity)activities.Dequeue(); if (activity is CompositeActivity) { foreach (Activity child in ((CompositeActivity)activity).Activities) activities.Enqueue(child); } //If we are moving activities, we need not regenerate their identifiers if (((IComponent)activity).Site != null) continue; //If the activity is built-in, we won't generate a new ID. if (IsPreBuiltActivity(activity)) continue; allActivities.Add(activity); } // get the root activity CompositeActivity rootActivity = Helpers.GetRootActivity(parentActivity) as CompositeActivity; StringDictionary identifiers = new StringDictionary(); // all the identifiers in the workflow Type customActivityType = GetRootActivityType(this.serviceProvider); if (rootActivity != null) { foreach (string identifier in Helpers.GetIdentifiersInCompositeActivity(rootActivity)) identifiers[identifier] = identifier; } if (customActivityType != null) { foreach (MemberInfo member in customActivityType.GetMembers(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance)) { Type memberType = null; if (member is FieldInfo) memberType = ((FieldInfo)member).FieldType; if (memberType == null || !typeof(Activity).IsAssignableFrom(memberType)) identifiers[member.Name] = member.Name; } } // now loop until we find a identifier that hasn't been used foreach (Activity activity in allActivities) { int index = 0; string baseIdentifier = Helpers.GetBaseIdentifier(activity); string finalIdentifier = null; if (string.IsNullOrEmpty(activity.Name) || string.Equals(activity.Name, activity.GetType().Name, StringComparison.Ordinal)) finalIdentifier = string.Format(CultureInfo.InvariantCulture, "{0}{1}", new object[] { baseIdentifier, ++index }); else finalIdentifier = activity.Name; while (identifiers.ContainsKey(finalIdentifier)) { finalIdentifier = string.Format(CultureInfo.InvariantCulture, "{0}{1}", new object[] { baseIdentifier, ++index }); if (this.Provider != null) finalIdentifier = this.Provider.CreateValidIdentifier(finalIdentifier); } // add new identifier to collection identifiers[finalIdentifier] = finalIdentifier; activity.Name = finalIdentifier; } } #endregion private Type GetRootActivityType(IServiceProvider serviceProvider) { IDesignerHost host = serviceProvider.GetService(typeof(IDesignerHost)) as IDesignerHost; if (host == null) throw new Exception(SR.GetString(SR.General_MissingService, typeof(IDesignerHost).FullName)); string className = host.RootComponentClassName; if (string.IsNullOrEmpty(className)) return null; ITypeProvider typeProvider = serviceProvider.GetService(typeof(ITypeProvider)) as ITypeProvider; if (typeProvider == null) throw new Exception(SR.GetString(SR.General_MissingService, typeof(ITypeProvider).FullName)); return typeProvider.GetType(className, false); } private static bool IsPreBuiltActivity(Activity activity) { CompositeActivity parent = activity.Parent; while (parent != null) { // Any custom activity found, then locked if (Helpers.IsCustomActivity(parent)) return true; parent = parent.Parent; } return false; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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