mcs/class/referencesource/System.Workflow.Activities/Common/ValidationHelpers.cs

   1 // Copyright (c) Microsoft Corporation. All rights reserved.
   2 //
   3 // THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
   4 // WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
   5 // WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
   6 // THE ENTIRE RISK OF USE OR RESULTS IN CONNECTION WITH THE USE OF THIS CODE
   7 // AND INFORMATION REMAINS WITH THE USER.
   8 //
   9
  10 /*********************************************************************
  11  * NOTE: A copy of this file exists at: WF\Common\Shared
  12  * The two files must be kept in sync.  Any change made here must also
  13  * be made to WF\Common\Shared\ValidationHelpers.cs
  14 *********************************************************************/
  15 namespace System.Workflow.Activities.Common
  16 {
  17     #region Imports
  18
  19     using System;
  20     using System.Diagnostics;
  21     using System.Collections;
  22     using System.Collections.Generic;
  23     using System.Reflection;
  24     using System.CodeDom.Compiler;
  25     using System.Workflow.ComponentModel.Design;
  26     using System.Workflow.ComponentModel.Compiler;
  27     using System.Collections.Specialized;
  28     using System.ComponentModel.Design.Serialization;
  29     using System.Workflow.ComponentModel;
  30     #endregion
  31
  32     internal static class ValidationHelpers
  33     {
  34         #region Validation & helpers for ID and Type
  35
  36         internal static void ValidateIdentifier(IServiceProvider serviceProvider, string identifier)
  37         {
  38             if (serviceProvider == null)
  39                 throw new ArgumentNullException("serviceProvider");
  40
  41             SupportedLanguages language = CompilerHelpers.GetSupportedLanguage(serviceProvider);
  42             CodeDomProvider provider = CompilerHelpers.GetCodeDomProvider(language);
  43             if (language == SupportedLanguages.CSharp && identifier.StartsWith("@", StringComparison.Ordinal) ||
  44                 language == SupportedLanguages.VB && identifier.StartsWith("[", StringComparison.Ordinal) && identifier.EndsWith("]", StringComparison.Ordinal) ||
  45                 !provider.IsValidIdentifier(identifier))
  46             {
  47                 throw new Exception(SR.GetString(SR.Error_InvalidLanguageIdentifier, identifier));
  48             }
  49         }
  50
  51         internal static ValidationError ValidateIdentifier(string propName, IServiceProvider context, string identifier)
  52         {
  53             if (context == null)
  54                 throw new ArgumentNullException("context");
  55
  56             ValidationError error = null;
  57             if (identifier == null || identifier.Length == 0)
  58                 error = new ValidationError(SR.GetString(SR.Error_PropertyNotSet, propName), ErrorNumbers.Error_PropertyNotSet);
  59             else
  60             {
  61                 try
  62                 {
  63                     ValidationHelpers.ValidateIdentifier(context, identifier);
  64                 }
  65                 catch (Exception e)
  66                 {
  67                     error = new ValidationError(SR.GetString(SR.Error_InvalidIdentifier, propName, e.Message), ErrorNumbers.Error_InvalidIdentifier);
  68                 }
  69             }
  70             if (error != null)
  71                 error.PropertyName = propName;
  72             return error;
  73         }
  74
  75         internal static ValidationError ValidateNameProperty(string propName, IServiceProvider context, string identifier)
  76         {
  77             if (context == null)
  78                 throw new ArgumentNullException("context");
  79
  80             ValidationError error = null;
  81             if (identifier == null || identifier.Length == 0)
  82                 error = new ValidationError(SR.GetString(SR.Error_PropertyNotSet, propName), ErrorNumbers.Error_PropertyNotSet);
  83             else
  84             {
  85                 SupportedLanguages language = CompilerHelpers.GetSupportedLanguage(context);
  86                 CodeDomProvider provider = CompilerHelpers.GetCodeDomProvider(language);
  87
  88                 if (language == SupportedLanguages.CSharp && identifier.StartsWith("@", StringComparison.Ordinal) ||
  89                     language == SupportedLanguages.VB && identifier.StartsWith("[", StringComparison.Ordinal) && identifier.EndsWith("]", StringComparison.Ordinal) ||
  90                     !provider.IsValidIdentifier(provider.CreateEscapedIdentifier(identifier)))
  91                 {
  92                     error = new ValidationError(SR.GetString(SR.Error_InvalidIdentifier, propName, SR.GetString(SR.Error_InvalidLanguageIdentifier, identifier)), ErrorNumbers.Error_InvalidIdentifier);
  93                 }
  94             }
  95             if (error != null)
  96                 error.PropertyName = propName;
  97             return error;
  98         }
  99
 100         internal static ValidationErrorCollection ValidateUniqueIdentifiers(Activity rootActivity)
 101         {
 102             if (rootActivity == null)
 103                 throw new ArgumentNullException("rootActivity");
 104
 105             Hashtable identifiers = new Hashtable();
 106             ValidationErrorCollection validationErrors = new ValidationErrorCollection();
 107             Queue activities = new Queue();
 108             activities.Enqueue(rootActivity);
 109             while (activities.Count > 0)
 110             {
 111                 Activity activity = (Activity)activities.Dequeue();
 112                 if (activity.Enabled)
 113                 {
 114                     if (identifiers.ContainsKey(activity.QualifiedName))
 115                     {
 116                         ValidationError duplicateError = new ValidationError(SR.GetString(SR.Error_DuplicatedActivityID, activity.QualifiedName), ErrorNumbers.Error_DuplicatedActivityID);
 117                         duplicateError.PropertyName = "Name";
 118                         duplicateError.UserData[typeof(Activity)] = activity;
 119                         validationErrors.Add(duplicateError);
 120                     }
 121                     else
 122                         identifiers.Add(activity.QualifiedName, activity);
 123
 124                     if (activity is CompositeActivity && ((activity.Parent == null) || !Helpers.IsCustomActivity(activity as CompositeActivity)))
 125                     {
 126                         foreach (Activity child in Helpers.GetAllEnabledActivities((CompositeActivity)activity))
 127                             activities.Enqueue(child);
 128                     }
 129                 }
 130             }
 131
 132             return validationErrors;
 133
 134         }
 135         #endregion
 136
 137         #region Validation for Activity Ref order
 138
 139         internal static bool IsActivitySourceInOrder(Activity request, Activity response)
 140         {
 141             if (request.Parent == null)
 142                 return true;
 143             List<Activity> responsePath = new List<Activity>();
 144             responsePath.Add(response);
 145             Activity responseParent = response is CompositeActivity ? (CompositeActivity)response : response.Parent;
 146             while (responseParent != null)
 147             {
 148                 responsePath.Add(responseParent);
 149                 responseParent = responseParent.Parent;
 150             }
 151
 152             Activity requestChild = request;
 153             CompositeActivity requestParent = request is CompositeActivity ? (CompositeActivity)request : request.Parent;
 154             while (requestParent != null && !responsePath.Contains(requestParent))
 155             {
 156                 requestChild = requestParent;
 157                 requestParent = requestParent.Parent;
 158             }
 159
 160             if (requestParent == requestChild)
 161                 return true;
 162
 163             bool incorrectOrder = false;
 164             int index = (responsePath.IndexOf(requestParent) - 1);
 165             index = (index < 0) ? 0 : index; //sometimes parent gets added to the collection twice which causes index to be -1
 166             Activity responseChild = responsePath[index];
 167
 168             if (requestParent == null || Helpers.IsAlternateFlowActivity(requestChild) || Helpers.IsAlternateFlowActivity(responseChild))
 169                 incorrectOrder = true;
 170             else
 171             {
 172                 for (int i = 0; i < requestParent.EnabledActivities.Count; i++)
 173                 {
 174                     if (requestParent.EnabledActivities[i] == requestChild)
 175                         break;
 176                     else if (requestParent.EnabledActivities[i] == responseChild)
 177                     {
 178                         incorrectOrder = true;
 179                         break;
 180                     }
 181                 }
 182             }
 183             return !incorrectOrder;
 184         }
 185
 186         #endregion
 187
 188         internal static ValidationErrorCollection ValidateObject(ValidationManager manager, object obj)
 189         {
 190             ValidationErrorCollection errors = new ValidationErrorCollection();
 191             if (obj == null)
 192                 return errors;
 193
 194             Type objType = obj.GetType();
 195             if (!objType.IsPrimitive && (objType != typeof(string)))
 196             {
 197                 bool removeValidatedObjectCollection = false;
 198                 Dictionary<int, object> validatedObjects = manager.Context[typeof(Dictionary<int, object>)] as Dictionary<int, object>;
 199                 if (validatedObjects == null)
 200                 {
 201                     validatedObjects = new Dictionary<int, object>();
 202                     manager.Context.Push(validatedObjects);
 203                     removeValidatedObjectCollection = true;
 204                 }
 205
 206                 try
 207                 {
 208                     if (!validatedObjects.ContainsKey(obj.GetHashCode()))
 209                     {
 210                         validatedObjects.Add(obj.GetHashCode(), obj);
 211                         try
 212                         {
 213                             Validator[] validators = manager.GetValidators(objType);
 214                             foreach (Validator validator in validators)
 215                                 errors.AddRange(validator.Validate(manager, obj));
 216                         }
 217                         finally
 218                         {
 219                             validatedObjects.Remove(obj.GetHashCode());
 220                         }
 221                     }
 222                 }
 223                 finally
 224                 {
 225                     if (removeValidatedObjectCollection)
 226                         manager.Context.Pop();
 227                 }
 228             }
 229
 230             return errors;
 231         }
 232
 233         internal static ValidationErrorCollection ValidateActivity(ValidationManager manager, Activity activity)
 234         {
 235             ValidationErrorCollection errors = ValidationHelpers.ValidateObject(manager, activity);
 236
 237             foreach (ValidationError error in errors)
 238             {
 239                 if (!error.UserData.Contains(typeof(Activity)))
 240                     error.UserData[typeof(Activity)] = activity;
 241             }
 242             return errors;
 243         }
 244
 245         internal static ValidationErrorCollection ValidateProperty(ValidationManager manager, Activity activity, object obj, PropertyValidationContext propertyValidationContext)
 246         {
 247             return ValidateProperty(manager, activity, obj, propertyValidationContext, null);
 248         }
 249
 250         internal static ValidationErrorCollection ValidateProperty(ValidationManager manager, Activity activity, object obj, PropertyValidationContext propertyValidationContext, object extendedPropertyContext)
 251         {
 252             if (manager == null)
 253                 throw new ArgumentNullException("manager");
 254             if (obj == null)
 255                 throw new ArgumentNullException("obj");
 256             if (propertyValidationContext == null)
 257                 throw new ArgumentNullException("propertyValidationContext");
 258
 259             ValidationErrorCollection errors = new ValidationErrorCollection();
 260
 261             manager.Context.Push(activity);
 262             manager.Context.Push(propertyValidationContext);
 263             if (extendedPropertyContext != null)
 264                 manager.Context.Push(extendedPropertyContext);
 265             try
 266             {
 267                 errors.AddRange(ValidationHelpers.ValidateObject(manager, obj));
 268             }
 269             finally
 270             {
 271                 manager.Context.Pop();
 272                 manager.Context.Pop();
 273                 if (extendedPropertyContext != null)
 274                     manager.Context.Pop();
 275             }
 276
 277             return errors;
 278         }
 279     }
 280 }