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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.Workflow.Activities
{
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Reflection;
using System.Runtime;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Compiler;
internal static class ServiceOperationHelpers
{
public static string GetOperationName(IServiceProvider serviceProvider, MethodInfo methodInfo)
{
Fx.Assert((methodInfo != null), " MethoInfo cannot be null");
string operationName = methodInfo.Name;
object[] operationContractAttribs = methodInfo.GetCustomAttributes(typeof(OperationContractAttribute), true);
if (operationContractAttribs != null && operationContractAttribs.Length > 0)
{
if (operationContractAttribs[0] is OperationContractAttribute)
{
OperationContractAttribute operationContractAttribute = operationContractAttribs[0] as OperationContractAttribute;
if (!String.IsNullOrEmpty(operationContractAttribute.Name))
{
operationName = operationContractAttribute.Name;
}
}
if (operationContractAttribs[0] is AttributeInfoAttribute)
{
AttributeInfoAttribute attribInfoAttrib = operationContractAttribs[0] as AttributeInfoAttribute;
string propertyName = "Name";
string namePropertyValue;
if (TryGetArgumentValueAs<string>(serviceProvider, attribInfoAttrib.AttributeInfo, propertyName, out namePropertyValue))
{
operationName = namePropertyValue;
}
}
}
return operationName;
}
public static PropertyDescriptor GetServiceOperationInfoPropertyDescriptor(Activity activity)
{
if (activity is ReceiveActivity)
{
return TypeDescriptor.GetProperties(activity)[ReceiveActivity.ServiceOperationInfoProperty.Name];
}
else
{
Fx.Assert(activity is SendActivity, " only Receive and Send activities are valid inputs to this method");
return TypeDescriptor.GetProperties(activity)[SendActivity.ServiceOperationInfoProperty.Name];
}
}
public static bool IsAsyncOperation(IServiceProvider serviceProvider, MethodInfo methodInfo)
{
if (serviceProvider == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("serviceProvider");
}
if (methodInfo == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("methodInfo");
}
bool isAsync = false;
object[] operationContractAttribs = methodInfo.GetCustomAttributes(typeof(OperationContractAttribute), true);
Fx.Assert(operationContractAttribs != null, "returned attribs list cannot be null");
Fx.Assert(operationContractAttribs.Length > 0, "operation doesnt seem to be a valid operationcontract");
if (operationContractAttribs[0] is OperationContractAttribute)
{
OperationContractAttribute operationContractAttribute = operationContractAttribs[0] as OperationContractAttribute;
isAsync = operationContractAttribute.AsyncPattern;
}
if (operationContractAttribs[0] is AttributeInfoAttribute)
{
AttributeInfoAttribute attribInfoAttrib = operationContractAttribs[0] as AttributeInfoAttribute;
isAsync = GetOperationAsyncPattern(serviceProvider, attribInfoAttrib.AttributeInfo);
}
return isAsync;
}
public static bool IsInitiatingOperation(IServiceProvider serviceProvider, MethodInfo methodInfo)
{
if (serviceProvider == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("serviceProvider");
}
if (methodInfo == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("methodInfo");
}
bool isInitiating = true;
object[] operationContractAttribs = methodInfo.GetCustomAttributes(typeof(OperationContractAttribute), true);
Fx.Assert(operationContractAttribs != null, "returned attribs list cannot be null");
Fx.Assert(operationContractAttribs.Length > 0, "operation doesnt seem to be a valid operationcontract");
if (operationContractAttribs[0] is OperationContractAttribute)
{
OperationContractAttribute operationContractAttribute = operationContractAttribs[0] as OperationContractAttribute;
isInitiating = operationContractAttribute.IsInitiating;
}
if (operationContractAttribs[0] is AttributeInfoAttribute)
{
AttributeInfoAttribute attribInfoAttrib = operationContractAttribs[0] as AttributeInfoAttribute;
isInitiating = IsInitiatingOperationContract(serviceProvider, attribInfoAttrib.AttributeInfo);
}
return isInitiating;
}
public static bool IsNullableType(Type type)
{
return (Nullable.GetUnderlyingType(type.IsByRef ? type.GetElementType() : type) != null);
}
public static bool IsValidServiceContract(Type contractType)
{
if (contractType == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contractType");
}
object[] contractAttribs = contractType.GetCustomAttributes(typeof(ServiceContractAttribute), false);
if (contractAttribs != null && contractAttribs.Length > 0)
{
if (contractAttribs[0] is ServiceContractAttribute)
{
return true;
}
if (contractAttribs[0] is AttributeInfoAttribute)
{
AttributeInfoAttribute attribInfoAttrib = contractAttribs[0] as AttributeInfoAttribute;
if (typeof(ServiceContractAttribute).IsAssignableFrom(attribInfoAttrib.AttributeInfo.AttributeType))
{
return true;
}
}
}
return false;
}
public static bool IsValidServiceOperation(MethodInfo methodInfo)
{
if (methodInfo == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("methodInfo");
}
object[] operationContractAttribs = methodInfo.GetCustomAttributes(typeof(OperationContractAttribute), true);
if (operationContractAttribs != null && operationContractAttribs.Length > 0)
{
if (operationContractAttribs[0] is OperationContractAttribute)
{
return true;
}
if (operationContractAttribs[0] is AttributeInfoAttribute)
{
AttributeInfoAttribute attribInfoAttrib = operationContractAttribs[0] as AttributeInfoAttribute;
if (typeof(OperationContractAttribute).IsAssignableFrom(attribInfoAttrib.AttributeInfo.AttributeType))
{
return true;
}
}
}
return false;
}
internal static List<Type> GetContracts(Type contractType)
{
List<Type> types = new List<Type>();
if (contractType.IsDefined(typeof(ServiceContractAttribute), false))
{
types.Add(contractType);
}
foreach (Type contract in contractType.GetInterfaces())
{
if (contract.IsDefined(typeof(ServiceContractAttribute), false))
{
types.Add(contract);
}
}
return types;
}
internal static SessionMode GetContractSessionMode(IServiceProvider serviceProvider, AttributeInfo attribInfo)
{
string propertyName = "SessionMode";
SessionMode sessionMode = SessionMode.Allowed;
if (!TryGetArgumentValueAs<SessionMode>(serviceProvider, attribInfo, propertyName, out sessionMode))
{
sessionMode = SessionMode.Allowed;
}
return sessionMode;
}
internal static object[] GetCustomAttributes(Type attributeType, Attribute[] attributes)
{
if (attributeType == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("attributeType");
}
ArrayList attributeList = new ArrayList();
foreach (Attribute currentAttribute in attributes)
{
if (attributeType.IsAssignableFrom(currentAttribute.GetType()))
{
attributeList.Add(currentAttribute);
}
}
return attributeList.ToArray();
}
internal static bool GetOperationAsyncPattern(IServiceProvider serviceProvider, AttributeInfo attribInfo)
{
string propertyName = "AsyncPattern";
bool isAsync = false;
if (!TryGetArgumentValueAs<bool>(serviceProvider, attribInfo, propertyName, out isAsync))
{
isAsync = false;
}
return isAsync;
}
internal static bool IsDefined(Type attributeType,
Attribute[] attributes)
{
if (attributeType == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("attributeType");
}
foreach (Attribute attribute in attributes)
{
if (attributeType.IsAssignableFrom(attribute.GetType()))
{
return true;
}
}
return false;
}
internal static bool IsInitiatingOperationContract(IServiceProvider serviceProvider, AttributeInfo attribInfo)
{
string propertyName = "IsInitiating";
bool isInitiating = true;
if (!TryGetArgumentValueAs<bool>(serviceProvider, attribInfo, propertyName, out isInitiating))
{
isInitiating = true;
}
return isInitiating;
}
internal static void SetWorkflowOperationBehavior(ContractDescription contractDescription, ServiceDescriptionContext context)
{
if (contractDescription == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contractDescription");
}
if (context == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("context");
}
foreach (OperationDescription opDescription in contractDescription.Operations)
{
WorkflowOperationBehavior behavior = null;
KeyValuePair<Type, string> operationKey =
new KeyValuePair<Type, string>(opDescription.DeclaringContract.ContractType, opDescription.Name);
if (!context.WorkflowOperationBehaviors.TryGetValue(operationKey, out behavior))
{
behavior = new WorkflowOperationBehavior();
context.WorkflowOperationBehaviors.Add(operationKey, behavior);
behavior.CanCreateInstance = false;
}
if (opDescription.Behaviors.Find<WorkflowOperationBehavior>() != behavior)
{
opDescription.Behaviors.Remove(typeof(WorkflowOperationBehavior));
opDescription.Behaviors.Add(behavior);
}
}
}
private static string[] GetAttributePropertyNames(AttributeInfo attributeInfo)
{
if (attributeInfo == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("attributeInfo");
}
string[] argumentNames = null;
BindingFlags bindingFlags = BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.NonPublic;
FieldInfo argumentNamesField = typeof(AttributeInfo).GetField("argumentNames", bindingFlags);
if (argumentNamesField != null)
{
argumentNames = argumentNamesField.GetValue(attributeInfo) as string[];
}
return argumentNames;
}
private static bool TryGetArgumentValueAs<T>(IServiceProvider serviceProvider, AttributeInfo attribInfo, string propertyName, out T propertyValue)
{
string[] argumentNames = GetAttributePropertyNames(attribInfo);
int argumentIndex = -1;
for (int index = 0; index < argumentNames.Length; index++)
{
// skip unnamed arguments these are constructor arguments
if (string.IsNullOrEmpty((argumentNames[index])))
{
continue;
}
else
{
if (argumentNames[index].Equals(propertyName))
{
argumentIndex = index;
break;
}
}
}
if (argumentIndex == -1)
{
propertyValue = default(T);
return false;
}
propertyValue = (T) attribInfo.GetArgumentValueAs(serviceProvider, argumentIndex, typeof(T));
return true;
}
}
}
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