private DataPortalClient.IDataPortalProxy GetDataPortalProxy(Reflection.ServiceProviderMethodInfo method)
{
if (method != null)
{
return(GetDataPortalProxy(method.MethodInfo.RunLocal()));
}
else
{
return(GetDataPortalProxy(false));
}
}
/// <summary>
/// Find a method based on data portal criteria
/// and providing any remaining parameters with
/// values from an IServiceProvider
/// </summary>
/// <param name="targetType">Type of domain object</param>
/// <param name="criteria">Data portal criteria values</param>
/// <param name="throwOnError">Throw exceptions on error</param>
public ServiceProviderMethodInfo FindDataPortalMethod <T>(Type targetType, object[] criteria, bool throwOnError = true)
where T : DataPortalOperationAttribute
{
if (targetType == null)
{
throw new ArgumentNullException(nameof(targetType));
}
var typeOfOperation = typeof(T);
var cacheKey = GetCacheKeyName(targetType, typeOfOperation, criteria);
if (_methodCache.TryGetValue(cacheKey, out ServiceProviderMethodInfo cachedMethod))
{
if (!throwOnError || cachedMethod != null)
{
return(cachedMethod);
}
}
var candidates = new List <ScoredMethodInfo>();
var factoryInfo = Csla.Server.ObjectFactoryAttribute.GetObjectFactoryAttribute(targetType);
if (factoryInfo != null)
{
var factoryType = Csla.Server.FactoryDataPortal.FactoryLoader.GetFactoryType(factoryInfo.FactoryTypeName);
var ftList = new List <System.Reflection.MethodInfo>();
var level = 0;
while (factoryType != null)
{
ftList.Clear();
if (typeOfOperation == typeof(CreateAttribute))
{
ftList.AddRange(factoryType.GetMethods(_factoryBindingAttr).Where(m => m.Name == factoryInfo.CreateMethodName));
}
else if (typeOfOperation == typeof(FetchAttribute))
{
ftList.AddRange(factoryType.GetMethods(_factoryBindingAttr).Where(m => m.Name == factoryInfo.FetchMethodName));
}
else if (typeOfOperation == typeof(DeleteAttribute))
{
ftList.AddRange(factoryType.GetMethods(_factoryBindingAttr).Where(m => m.Name == factoryInfo.DeleteMethodName));
}
else if (typeOfOperation == typeof(ExecuteAttribute))
{
ftList.AddRange(factoryType.GetMethods(_factoryBindingAttr).Where(m => m.Name == factoryInfo.ExecuteMethodName));
}
else if (typeOfOperation == typeof(CreateChildAttribute))
{
ftList.AddRange(factoryType.GetMethods(_factoryBindingAttr).Where(m => m.Name == "Child_Create"));
}
else
{
ftList.AddRange(factoryType.GetMethods(_factoryBindingAttr).Where(m => m.Name == factoryInfo.UpdateMethodName));
}
factoryType = factoryType.BaseType;
candidates.AddRange(ftList.Select(r => new ScoredMethodInfo {
MethodInfo = r, Score = level
}));
level--;
}
if (!candidates.Any() && typeOfOperation == typeof(CreateChildAttribute))
{
var ftlist = targetType.GetMethods(_bindingAttr).Where(m => m.Name == "Child_Create");
candidates.AddRange(ftList.Select(r => new ScoredMethodInfo {
MethodInfo = r, Score = 0
}));
}
}
else // not using factory types
{
var tt = targetType;
var level = 0;
while (tt != null)
{
var ttList = tt.GetMethods(_bindingAttr).Where(m => m.GetCustomAttributes <T>().Any());
candidates.AddRange(ttList.Select(r => new ScoredMethodInfo {
MethodInfo = r, Score = level
}));
tt = tt.BaseType;
level--;
}
// if no attribute-based methods found, look for legacy methods
if (!candidates.Any())
{
var attributeName = typeOfOperation.Name.Substring(0, typeOfOperation.Name.IndexOf("Attribute"));
var methodName = attributeName.Contains("Child") ?
"Child_" + attributeName.Substring(0, attributeName.IndexOf("Child")) :
"DataPortal_" + attributeName;
tt = targetType;
level = 0;
while (tt != null)
{
var ttList = tt.GetMethods(_bindingAttr).Where(m => m.Name == methodName);
candidates.AddRange(ttList.Select(r => new ScoredMethodInfo {
MethodInfo = r, Score = level
}));
tt = tt.BaseType;
level--;
}
}
}
ScoredMethodInfo result = null;
if (candidates != null && candidates.Any())
{
// scan candidate methods for matching criteria parameters
int criteriaLength = 0;
if (criteria != null)
{
if (criteria.GetType().Equals(typeof(object[])))
{
criteriaLength = criteria.GetLength(0);
}
else
{
criteriaLength = 1;
}
}
var matches = new List <ScoredMethodInfo>();
if (criteriaLength > 0)
{
foreach (var item in candidates)
{
int score = 0;
var methodParams = GetCriteriaParameters(item.MethodInfo);
if (methodParams.Length == criteriaLength)
{
var index = 0;
if (criteria.GetType().Equals(typeof(object[])))
{
foreach (var c in criteria)
{
var currentScore = CalculateParameterScore(methodParams[index], c);
if (currentScore == 0)
{
break;
}
score += currentScore;
index++;
}
}
else
{
var currentScore = CalculateParameterScore(methodParams[index], criteria);
if (currentScore != 0)
{
score += currentScore;
index++;
}
}
if (index == criteriaLength)
{
matches.Add(new ScoredMethodInfo {
MethodInfo = item.MethodInfo, Score = score + item.Score
});
}
}
}
if (matches.Count() == 0 &&
(typeOfOperation == typeof(DeleteSelfAttribute) || typeOfOperation == typeof(DeleteSelfChildAttribute)))
{
// implement zero parameter fallback if other matches not found
foreach (var item in candidates)
{
if (GetCriteriaParameters(item.MethodInfo).Length == 0)
{
matches.Add(new ScoredMethodInfo {
MethodInfo = item.MethodInfo, Score = item.Score
});
}
}
}
}
else
{
foreach (var item in candidates)
{
if (GetCriteriaParameters(item.MethodInfo).Length == 0)
{
matches.Add(new ScoredMethodInfo {
MethodInfo = item.MethodInfo, Score = item.Score
});
}
}
}
if (matches.Count == 0)
{
// look for params array
foreach (var item in candidates)
{
var lastParam = item.MethodInfo.GetParameters().LastOrDefault();
if (lastParam != null && lastParam.ParameterType.Equals(typeof(object[])) &&
lastParam.GetCustomAttributes <ParamArrayAttribute>().Any())
{
matches.Add(new ScoredMethodInfo {
MethodInfo = item.MethodInfo, Score = 1 + item.Score
});
}
}
}
if (matches.Count > 0)
{
result = matches[0];
if (matches.Count > 1)
{
// disambiguate if necessary, using a greedy algorithm
// so more DI parameters are better
foreach (var item in matches)
{
item.Score += GetDIParameters(item.MethodInfo).Length;
}
var maxScore = int.MinValue;
var maxCount = 0;
foreach (var item in matches)
{
if (item.Score > maxScore)
{
maxScore = item.Score;
maxCount = 1;
result = item;
}
else if (item.Score == maxScore)
{
maxCount++;
}
}
if (maxCount > 1)
{
if (throwOnError)
{
throw new AmbiguousMatchException($"{targetType.FullName}.[{typeOfOperation.Name.Replace("Attribute", "")}]{GetCriteriaTypeNames(criteria)}. Matches: {string.Join(", ", matches.Select(m => $"{m.MethodInfo.DeclaringType.FullName}[{m.MethodInfo}]"))}");
}
else
{
_methodCache.TryAdd(cacheKey, null);
return(null);
}
}
}
}
}
ServiceProviderMethodInfo resultingMethod = null;
if (result != null)
{
resultingMethod = new ServiceProviderMethodInfo {
MethodInfo = result.MethodInfo
};
}
else
{
var baseType = targetType.BaseType;
if (baseType == null)
{
if (throwOnError)
{
throw new TargetParameterCountException(cacheKey);
}
else
{
_methodCache.TryAdd(cacheKey, null);
return(null);
}
}
try
{
resultingMethod = FindDataPortalMethod <T>(baseType, criteria, throwOnError);
}
catch (TargetParameterCountException ex)
{
throw new TargetParameterCountException(cacheKey, ex);
}
catch (AmbiguousMatchException ex)
{
throw new AmbiguousMatchException($"{targetType.FullName}.[{typeOfOperation.Name.Replace("Attribute", "")}]{GetCriteriaTypeNames(criteria)}.", ex);
}
}
_methodCache.TryAdd(cacheKey, resultingMethod);
return(resultingMethod);
}
private static DataPortalClient.IDataPortalProxy GetDataPortalProxy(Type objectType, Reflection.ServiceProviderMethodInfo method)
{
if (method != null)
{
return(GetDataPortalProxy(objectType, method.MethodInfo.RunLocal()));
}
else
{
return(GetDataPortalProxy(objectType, false));
}
}
/// <summary>
/// Invoke a method async if possible, providing
/// parameters from the params array and from DI
/// </summary>
/// <param name="obj">Target object</param>
/// <param name="method">Method to invoke</param>
/// <param name="parameters">Criteria params array</param>
/// <returns></returns>
public async Task <object> CallMethodTryAsync(object obj, ServiceProviderMethodInfo method, object[] parameters)
{
if (method == null)
{
throw new ArgumentNullException(obj.GetType().FullName + ".<null>() " + Resources.MethodNotImplemented);
}
var info = method.MethodInfo;
method.PrepForInvocation();
object[] plist;
if (method.TakesParamArray)
{
plist = new object[] { parameters };
}
else
{
plist = new object[method.Parameters.Length];
int index = 0;
int criteriaIndex = 0;
var service = ApplicationContext.CurrentServiceProvider;
foreach (var item in method.Parameters)
{
if (method.IsInjected[index])
{
if (service == null)
{
throw new NullReferenceException(nameof(service));
}
plist[index] = service.GetService(item.ParameterType);
}
else
{
if (parameters.GetType().Equals(typeof(object[])))
{
if (parameters == null || parameters.Length - 1 < criteriaIndex)
{
plist[index] = null;
}
else
{
plist[index] = parameters[criteriaIndex];
}
}
else
{
plist[index] = parameters;
}
criteriaIndex++;
}
index++;
}
}
try
{
if (method.IsAsyncTask)
{
await((Task)method.DynamicMethod(obj, plist)).ConfigureAwait(false);
return(null);
}
else if (method.IsAsyncTaskObject)
{
return(await((Task <object>)method.DynamicMethod(obj, plist)).ConfigureAwait(false));
}
else
{
var result = method.DynamicMethod(obj, plist);
return(result);
}
}
catch (Exception ex)
{
Exception inner = null;
if (ex.InnerException == null)
{
inner = ex;
}
else
{
inner = ex.InnerException;
}
throw new CallMethodException(obj.GetType().Name + "." + info.Name + " " + Resources.MethodCallFailed, inner);
}
}
/// <summary>
/// Find a method based on data portal criteria
/// and providing any remaining parameters with
/// values from an IServiceProvider
/// </summary>
/// <param name="targetType">Type of domain object</param>
/// <param name="criteria">Data portal criteria values</param>
/// <param name="throwOnError">Throw exceptions on error</param>
public static ServiceProviderMethodInfo FindDataPortalMethod <T>(Type targetType, object[] criteria, bool throwOnError = true)
where T : DataPortalOperationAttribute
{
if (targetType == null)
{
throw new ArgumentNullException(nameof(targetType));
}
var typeOfOperation = typeof(T);
var cacheKey = GetCacheKeyName(targetType, typeOfOperation, criteria);
if (_methodCache.TryGetValue(cacheKey, out ServiceProviderMethodInfo cachedMethod))
{
return(cachedMethod);
}
IEnumerable <System.Reflection.MethodInfo> candidates = null;
var factoryInfo = Csla.Server.ObjectFactoryAttribute.GetObjectFactoryAttribute(targetType);
if (factoryInfo != null)
{
var factoryType = Csla.Server.FactoryDataPortal.FactoryLoader.GetFactoryType(factoryInfo.FactoryTypeName);
if (factoryType != null)
{
if (typeOfOperation == typeof(CreateAttribute))
{
candidates = factoryType.GetMethods(_factoryBindingAttr).Where(m => m.Name == factoryInfo.CreateMethodName);
}
else if (typeOfOperation == typeof(FetchAttribute))
{
candidates = factoryType.GetMethods(_factoryBindingAttr).Where(m => m.Name == factoryInfo.FetchMethodName);
}
else if (typeOfOperation == typeof(DeleteAttribute))
{
candidates = factoryType.GetMethods(_factoryBindingAttr).Where(m => m.Name == factoryInfo.DeleteMethodName);
}
else if (typeOfOperation == typeof(ExecuteAttribute))
{
candidates = factoryType.GetMethods(_factoryBindingAttr).Where(m => m.Name == factoryInfo.ExecuteMethodName);
}
else
{
candidates = factoryType.GetMethods(_factoryBindingAttr).Where(m => m.Name == factoryInfo.UpdateMethodName);
}
}
}
else
{
candidates = targetType.GetMethods(_bindingAttr).
Where(m => m.GetCustomAttributes <T>().Any());
// if no attribute-based methods found, look for legacy methods
if (!candidates.Any())
{
var attributeName = typeOfOperation.Name.Substring(0, typeOfOperation.Name.IndexOf("Attribute"));
var methodName = attributeName.Contains("Child") ?
"Child_" + attributeName.Substring(0, attributeName.IndexOf("Child")) :
"DataPortal_" + attributeName;
candidates = targetType.GetMethods(_bindingAttr).Where(
m => m.Name == methodName);
}
}
ScoredMethodInfo result = null;
if (candidates != null && candidates.Any())
{
// scan candidate methods for matching criteria parameters
int criteriaLength = 0;
if (criteria != null)
{
criteriaLength = criteria.GetLength(0);
}
var matches = new List <ScoredMethodInfo>();
if (criteriaLength > 0)
{
foreach (var item in candidates)
{
int score = 0;
var methodParams = GetCriteriaParameters(item);
if (methodParams.Length == criteriaLength)
{
var index = 0;
foreach (var c in criteria)
{
if (c == null)
{
if (methodParams[index].ParameterType.IsPrimitive)
{
break;
}
else if (methodParams[index].ParameterType == typeof(object))
{
score++;
}
}
else
{
if (c.GetType() == methodParams[index].ParameterType)
{
score += 2;
}
else if (methodParams[index].ParameterType.IsAssignableFrom(c.GetType()))
{
score++;
}
else
{
break;
}
}
index++;
}
if (index == criteriaLength)
{
matches.Add(new ScoredMethodInfo {
MethodInfo = item, Score = score
});
}
}
}
}
else
{
foreach (var item in candidates)
{
if (GetCriteriaParameters(item).Length == 0)
{
matches.Add(new ScoredMethodInfo {
MethodInfo = item
});
}
}
}
if (matches.Count == 0)
{
// look for params array
foreach (var item in candidates)
{
var lastParam = item.GetParameters().LastOrDefault();
if (lastParam != null && lastParam.ParameterType.Equals(typeof(object[])) &&
lastParam.GetCustomAttributes <ParamArrayAttribute>().Any())
{
matches.Add(new ScoredMethodInfo {
MethodInfo = item, Score = 1
});
}
}
}
if (matches.Count > 0)
{
result = matches[0];
if (matches.Count > 1)
{
// disambiguate if necessary, using a greedy algorithm
// so more DI parameters are better
foreach (var item in matches)
{
item.Score += GetDIParameters(item.MethodInfo).Length;
}
var maxScore = int.MinValue;
var maxCount = 0;
foreach (var item in matches)
{
if (item.Score > maxScore)
{
maxScore = item.Score;
maxCount = 1;
result = item;
}
else if (item.Score == maxScore)
{
maxCount++;
}
}
if (maxCount > 1)
{
if (throwOnError)
{
throw new AmbiguousMatchException($"{targetType.FullName}.[{typeOfOperation.Name.Replace("Attribute", "")}]{GetCriteriaTypeNames(criteria)}. Matches: {string.Join(", ", matches.Select(m => $"{m.MethodInfo.DeclaringType.FullName}[{m.MethodInfo}]"))}");
}
else
{
_methodCache.TryAdd(cacheKey, null);
return(null);
}
}
}
}
}
ServiceProviderMethodInfo resultingMethod = null;
if (result != null)
{
resultingMethod = new ServiceProviderMethodInfo {
MethodInfo = result.MethodInfo
};
}
else
{
var baseType = targetType.BaseType;
if (baseType == null)
{
if (throwOnError)
{
throw new TargetParameterCountException(cacheKey);
}
else
{
_methodCache.TryAdd(cacheKey, null);
return(null);
}
}
resultingMethod = FindDataPortalMethod <T>(baseType, criteria, throwOnError);
}
_methodCache.TryAdd(cacheKey, resultingMethod);
return(resultingMethod);
}
