/// <inheritdoc/>
public Task OnOperationExecutedAsync(
OperationContext context,
CancellationToken cancellationToken)
{
return this.InvokeProcessorMethodAsync(
context, ConventionBasedChangeSetConstants.FilterMethodNamePostFilterSuffix);
}
/// <inheritdoc/>
public Task<bool> AuthorizeAsync(
OperationContext context,
CancellationToken cancellationToken)
{
Ensure.NotNull(context, "context");
bool result = true;
Type returnType = typeof(bool);
var methodName = ConventionBasedChangeSetConstants.AuthorizeMethodActionInvocationExecute +
context.OperationName;
MethodInfo method = this.targetType.GetQualifiedMethod(methodName);
if (method != null && method.IsFamily &&
method.ReturnType == returnType)
{
object target = null;
if (!method.IsStatic)
{
target = context.ImplementInstance;
if (target == null ||
!this.targetType.IsInstanceOfType(target))
{
return Task.FromResult(result);
}
}
var parameters = method.GetParameters();
if (parameters.Length == 0)
{
result = (bool)method.Invoke(target, null);
}
}
return Task.FromResult(result);
}
private Task InvokeProcessorMethodAsync(
OperationContext context,
string methodNameSuffix)
{
string methodName = ConventionBasedChangeSetConstants.FilterMethodActionInvocationExecute +
methodNameSuffix + context.OperationName;
object[] parameters = null;
if (context.ParameterValues != null)
{
context.ParameterValues.ToArray();
}
MethodInfo method = this.targetType.GetQualifiedMethod(methodName);
if (method != null &&
(method.ReturnType == typeof(void) ||
typeof(Task).IsAssignableFrom(method.ReturnType)))
{
object target = null;
if (!method.IsStatic)
{
target = context.ImplementInstance;
if (target == null ||
!this.targetType.IsInstanceOfType(target))
{
return Task.WhenAll();
}
}
ParameterInfo[] methodParameters = method.GetParameters();
if (ParametersMatch(methodParameters, parameters))
{
object result = method.Invoke(target, parameters);
Task resultTask = result as Task;
if (resultTask != null)
{
return resultTask;
}
}
}
return Task.WhenAll();
}
public async Task<IQueryable> ExecuteOperationAsync(
object instanceImplementMethod, OperationContext context, CancellationToken cancellationToken)
{
// Authorization check
await InvokeAuthorizers(context, cancellationToken);
// model build does not support operation with same name
// So method with same name but different signature is not considered.
MethodInfo method = instanceImplementMethod.GetType().GetMethod(
context.OperationName, BindingFlags.Public | BindingFlags.Instance | BindingFlags.FlattenHierarchy);
if (method == null)
{
throw new NotImplementedException(Resources.OperationNotImplemented);
}
var parameterArray = method.GetParameters();
var model = context.ServiceProvider.GetService<IEdmModel>();
// Parameters of method and model is exactly mapped or there is parsing error
var parameters = new object[parameterArray.Length];
int paraIndex = 0;
if (context.BindingParameterValue != null)
{
// Add binding parameter which is first parameter of method
parameters[0] = PrepareBindingParameter(parameterArray[0].ParameterType, context.BindingParameterValue);
paraIndex = 1;
}
for (; paraIndex < parameterArray.Length; paraIndex++)
{
var parameter = parameterArray[paraIndex];
var currentParameterValue = context.GetParameterValueFunc(parameter.Name);
object convertedValue = null;
if (context.IsFunction)
{
var parameterTypeRef = parameter.ParameterType.GetTypeReference(model);
// Change to right CLR class for collection/Enum/Complex/Entity
convertedValue = DeserializationHelpers.ConvertValue(
currentParameterValue,
parameter.Name,
parameter.ParameterType,
parameterTypeRef,
model,
context.Request,
context.ServiceProvider);
}
else
{
convertedValue = DeserializationHelpers.ConvertCollectionType(
currentParameterValue, parameter.ParameterType);
}
parameters[paraIndex] = convertedValue;
}
context.ParameterValues = parameters;
// Invoke preprocessing on the operation execution
PerformPreEvent(context, cancellationToken);
var result = InvokeOperation(instanceImplementMethod, method, parameters, model);
// Invoke preprocessing on the operation execution
PerformPostEvent(context, cancellationToken);
return result;
}
private static void PerformPostEvent(OperationContext context, CancellationToken cancellationToken)
{
var processor = context.ServiceProvider.GetService<IOperationFilter>();
if (processor != null)
{
processor.OnOperationExecutedAsync(context, cancellationToken);
}
}
private static async Task InvokeAuthorizers(
OperationContext context,
CancellationToken cancellationToken)
{
var authorizor = context.GetApiService<IOperationAuthorizer>();
if (authorizor == null)
{
return;
}
if (!await authorizor.AuthorizeAsync(context, cancellationToken))
{
throw new SecurityException(string.Format(
CultureInfo.InvariantCulture, Resources.OperationUnAuthorizationExecution, context.OperationName));
}
}
private Task<IQueryable> ExecuteOperationAsync(
Func<string, object> getParaValueFunc,
string operationName,
bool isFunction,
IQueryable bindingParameterValue,
CancellationToken cancellationToken)
{
var executor = Api.Context.GetApiService<IOperationExecutor>();
var context = new OperationContext(
getParaValueFunc, operationName, Api, isFunction, bindingParameterValue);
context.ServiceProvider = Request.GetRequestContainer();
context.Request = Request;
var result = executor.ExecuteOperationAsync(Api, context, cancellationToken);
return result;
}