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// <copyright>
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
namespace System.ServiceModel.Description
{
using System.Reflection;
internal static class TaskOperationDescriptionValidator
{
internal static void Validate(OperationDescription operationDescription, bool isForService)
{
MethodInfo taskMethod = operationDescription.TaskMethod;
if (taskMethod != null)
{
if (isForService)
{
// no other method ([....], async) is allowed to co-exist with a task-based method on the server-side.
EnsureNoSyncMethod(operationDescription);
EnsureNoBeginEndMethod(operationDescription);
}
else
{
// no out/ref parameter is allowed on the client-side.
EnsureNoOutputParameters(taskMethod);
}
EnsureParametersAreSupported(taskMethod);
}
}
private static void EnsureNoSyncMethod(OperationDescription operation)
{
if (operation.SyncMethod != null)
{
string method1Name = operation.TaskMethod.Name;
string method2Name = operation.SyncMethod.Name;
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.CannotHaveTwoOperationsWithTheSameName3, method1Name, method2Name, operation.DeclaringContract.ContractType)));
}
}
private static void EnsureNoBeginEndMethod(OperationDescription operation)
{
if (operation.BeginMethod != null)
{
string method1Name = operation.TaskMethod.Name;
string method2Name = operation.BeginMethod.Name;
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.CannotHaveTwoOperationsWithTheSameName3, method1Name, method2Name, operation.DeclaringContract.ContractType)));
}
}
private static void EnsureParametersAreSupported(MethodInfo method)
{
foreach (ParameterInfo parameter in method.GetParameters())
{
Type parameterType = parameter.ParameterType;
if ((parameterType == ServiceReflector.CancellationTokenType) ||
(parameterType.IsGenericType && parameterType.GetGenericTypeDefinition() == ServiceReflector.IProgressType))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException(SR.GetString(SR.TaskMethodParameterNotSupported, parameterType)));
}
}
}
private static void EnsureNoOutputParameters(MethodInfo method)
{
if (ServiceReflector.HasOutputParameters(method, false))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.TaskMethodMustNotHaveOutParameter)));
}
}
}
}
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