/// <summary>
/// Initializes all service actions in the provider.
/// </summary>
/// <param name="operationContext">The operation context instance of the request.</param>
private void InitializeServiceActions(DataServiceOperationContext operationContext)
{
if (operationContext == null)
{
throw new DataServiceException("operationContext must not be null!");
}
var actionInfos = Interlocked.Exchange(ref this.serviceActionInfos, new Dictionary <string, DSPServiceActionInfo>());
if (actionInfos.Count > 0)
{
IDataServiceMetadataProvider metadataProvider = (IDataServiceMetadataProvider)operationContext.GetService(typeof(IDataServiceMetadataProvider));
if (metadataProvider == null)
{
throw new DataServiceException("DataServiceOperationContext.GetService(typeof(IDataServiceMetadataProvider)) must return a valid instance of the IDataServiceMetadataProvider.");
}
foreach (var entry in actionInfos)
{
DSPServiceActionInfo actionInfo = entry.Value;
DSPActionAttribute actionAttribute = actionInfo.ActionAttribute;
MethodInfo actionMethodInfo = actionInfo.Method;
ResourceType returnType = DSPActionProvider.GetResourceTypeFromType(metadataProvider, actionInfo.Method.ReturnType, actionAttribute.ReturnElementTypeName);
var parameters = DSPActionProvider.GetServiceActionParameters(metadataProvider, actionAttribute, actionMethodInfo);
ServiceAction action;
if (!string.IsNullOrEmpty(actionAttribute.ReturnSetPath))
{
if (actionAttribute.OperationParameterBindingKind != OperationParameterBindingKind.Always && actionAttribute.OperationParameterBindingKind != OperationParameterBindingKind.Sometimes)
{
throw new DataServiceException("DSPActionAttribute.IsBindable must be true when DSPActionAttribute.ReturnSetPath is not null.");
}
ResourceSetPathExpression pathExpression = new ResourceSetPathExpression(actionAttribute.ReturnSetPath);
action = new ServiceAction(actionMethodInfo.Name, returnType, OperationParameterBindingKind.Sometimes, parameters, pathExpression);
}
else
{
ResourceSet returnSet = null;
if (!string.IsNullOrEmpty(actionAttribute.ReturnSet))
{
metadataProvider.TryResolveResourceSet(actionAttribute.ReturnSet, out returnSet);
}
action = new ServiceAction(actionMethodInfo.Name, returnType, returnSet, actionAttribute.OperationParameterBindingKind, parameters);
}
action.CustomState = actionInfo;
action.SetReadOnly();
this.serviceActions.Add(actionMethodInfo.Name, action);
}
}
}
/// <summary>
/// Creates the service action parameters for the given action method info.
/// </summary>
/// <param name="metadataProvider">An instance of the IDataServiceMetadataProvider.</param>
/// <param name="actionAttribute">DSPActionAttribute instance for the action.</param>
/// <param name="actionMethodInfo">MethodInfo for the action.</param>
/// <returns></returns>
private static IEnumerable <ServiceActionParameter> GetServiceActionParameters(IDataServiceMetadataProvider metadataProvider, DSPActionAttribute actionAttribute, MethodInfo actionMethodInfo)
{
ParameterInfo[] parameterInfos = actionMethodInfo.GetParameters();
if (actionAttribute.ParameterTypeNames.Length != parameterInfos.Length)
{
throw new InvalidOperationException(string.Format("Mismatch parameter count between the DSPActionAttribute and the MethodInfo for the Action '{0}'.", actionMethodInfo.Name));
}
for (int idx = 0; idx < parameterInfos.Length; idx++)
{
ParameterInfo parameterInfo = parameterInfos[idx];
ResourceType parameterResourceType = DSPActionProvider.GetResourceTypeFromType(metadataProvider, parameterInfo.ParameterType, actionAttribute.ParameterTypeNames[idx]);
yield return(new ServiceActionParameter(parameterInfo.Name, parameterResourceType));
}
}
