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// ---------------------------------------------------------------------------
// 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;
}
/// <summary>
/// Is type a nullable value type (e.g. double?)?
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
internal static bool IsNullableValueType(Type type)
{
return ((type.IsValueType) && (type.IsGenericType) && (type.GetGenericTypeDefinition().Equals(typeof(Nullable<>))));
}
/// <summary>
/// Is type a standard value type (i.e. not Nullable)?
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
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;
}
}
}
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