public IQueryable <T> Get <T>() where T : class
{
// get component instance
var registration = Catalog.GetRegistration(ComponentName);
var instance = Catalog.GetComponentInstance(registration);
var type = instance.GetType();
// create generic method
var genericMethodInfo = type.GetMethod(MethodInfo.Name, new[] { typeof(T) }, new Type[0]);
if (genericMethodInfo == null)
{
var methodSignature = MessageHelpers.GetMethodSignature(type, MethodInfo.Name, new Type[0]);
var exceptionMessage = String.Format(LanguageResource.MissingMethodException_MethodNotFound, methodSignature);
throw new MissingMethodException(exceptionMessage);
}
// invoke Get<T> method and return IQueryable<T>
object result = genericMethodInfo.Invoke(instance, new object[0]);
if (result is IQueryable <T> )
{
return(result as IQueryable <T>);
}
if (result is IEnumerable <T> )
{
return((result as IEnumerable <T>).AsQueryable());
}
return(null);
}
/// <summary>
/// Obtains metadata of the invoked method via reflection.
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_ObtainMethodMetadata(InvocationDetails details)
{
if (!details.FindMethodInfo())
{
var methodSignature = MessageHelpers.GetMethodSignature(details.Type, details.MethodName, details.ParamTypes);
var exceptionMessage = String.Format(LanguageResource.MissingMethodException_MethodNotFound, methodSignature);
throw new MissingMethodException(exceptionMessage);
}
}
public IQueryable <T> Get <T>() where T : class
{
if (querySession == null)
{
throw new InvalidOperationException("Session is not started. ZyanMethodQueryHandler requires that StartSession method is called before Get<T>.");
}
// get component instance created by
var instance = querySession.Instance;
var instanceType = instance.GetType();
// create generic method
var genericMethodInfo = instanceType.GetMethod(MethodInfo.Name, new[] { typeof(T) }, new Type[0]);
if (genericMethodInfo == null)
{
var methodSignature = MessageHelpers.GetMethodSignature(instanceType, MethodInfo.Name, new Type[0]);
var exceptionMessage = string.Format(LanguageResource.MissingMethodException_MethodNotFound, methodSignature);
throw new MissingMethodException(exceptionMessage);
}
// invoke Get<T> method and return IQueryable<T>
object result = genericMethodInfo.Invoke(instance, new object[0]);
if (result is IQueryable <T> )
{
return(result as IQueryable <T>);
}
if (result is IEnumerable <T> )
{
return((result as IEnumerable <T>).AsQueryable());
}
return(null);
}