/// <summary>
/// Allows late bound invocation of
/// properties and methods.
/// </summary>
/// <param name="target">Object implementing the property or method.</param>
/// <param name="methodName">Name of the property or method.</param>
/// <param name="callType">Specifies how to invoke the property or method.</param>
/// <param name="args">List of arguments to pass to the method.</param>
/// <returns>The result of the property or method invocation.</returns>
public static object CallByName(
object target, string methodName, CallType callType,
params object[] args)
{
switch (callType)
{
case CallType.Get:
{
return(MethodCaller.CallPropertyGetter(target, methodName));
}
case CallType.Let:
case CallType.Set:
{
MethodCaller.CallPropertySetter(target, methodName, args[0]);
return(null);
}
case CallType.Method:
{
return(MethodCaller.CallMethod(target, methodName, args));
}
}
return(null);
}
/// <summary>
/// Throws an exception if a synchronous data portal call is trying to invoke an asynchronous method on the client.
/// </summary>
/// <param name="isSync">True if the client-side proxy should synchronously invoke the server.</param>
/// <param name="obj">Object containing method.</param>
/// <param name="methodName">Name of the method.</param>
/// <param name="parameters">
/// Parameters to pass to method.
/// </param>
internal static void ThrowIfAsyncMethodOnSyncClient(bool isSync, object obj, string methodName, params object[] parameters)
{
if (isSync &&
ApplicationContext.ExecutionLocation != ApplicationContext.ExecutionLocations.Server &&
MethodCaller.IsAsyncMethod(obj, methodName, parameters))
{
throw new NotSupportedException(string.Format(Resources.AsyncMethodOnSyncClientNotAllowed, methodName));
}
}
internal static void ThrowIfAsyncMethodOnSyncClient(bool isSync, System.Reflection.MethodInfo method)
{
if (isSync &&
ApplicationContext.ExecutionLocation != ApplicationContext.ExecutionLocations.Server &&
MethodCaller.IsAsyncMethod(method))
{
throw new NotSupportedException(string.Format(Resources.AsyncMethodOnSyncClientNotAllowed, method.Name));
}
}
/// <summary>
/// Loads the data portal factory.
/// </summary>
private static void LoadDataPortalProxyFactory()
{
if (_dataProxyFactory == null)
{
if (String.IsNullOrEmpty(ApplicationContext.DataPortalProxyFactory) || ApplicationContext.DataPortalProxyFactory == "Default")
{
_dataProxyFactory = new DataPortalClient.DefaultPortalProxyFactory();
}
else
{
var proxyFactoryType = Type.GetType(ApplicationContext.DataPortalProxyFactory, true, true);
_dataProxyFactory = (DataPortalClient.IDataPortalProxyFactory)MethodCaller.CreateInstance(proxyFactoryType);
}
}
}
/// <summary>
/// Gets a reference to the DataPortal_Fetch method for
/// the specified business object type.
/// </summary>
/// <param name="objectType">Type of the business object.</param>
/// <param name="criteria">Criteria parameter value.</param>
/// <remarks>
/// If the criteria parameter value is an integer, that is a special
/// flag indicating that the parameter should be considered missing
/// (not Nothing/null - just not there).
/// </remarks>
public static MethodInfo GetFetchMethod(Type objectType, object criteria)
{
MethodInfo method = null;
if (criteria is int)
{
// an "Integer" criteria is a special flag indicating
// that criteria is empty and should not be used
method = MethodCaller.GetMethod(objectType, "DataPortal_Fetch");
}
else
{
method = MethodCaller.GetMethod(objectType, "DataPortal_Fetch", criteria);
}
return(method);
}
/// <summary>
/// Loads the data portal factory.
/// </summary>
internal static void LoadDataPortalProxyFactory()
{
if (_dataProxyFactory == null)
{
if (String.IsNullOrEmpty(ApplicationContext.DataPortalProxyFactory) || ApplicationContext.DataPortalProxyFactory == "Default")
{
_dataProxyFactory = new DataPortalClient.DataPortalProxyFactory();
}
else
{
var proxyFactoryType =
Type.GetType(ApplicationContext.DataPortalProxyFactory) ??
throw new InvalidOperationException(
string.Format(Resources.UnableToLoadDataPortalProxyFactory, ApplicationContext.DataPortalProxyFactory));
_dataProxyFactory = (DataPortalClient.IDataPortalProxyFactory)MethodCaller.CreateInstance(proxyFactoryType);
}
}
}
private static object Fetch(Type objectType, object criteria)
{
Server.DataPortalResult result;
MethodInfo method = MethodCaller.GetMethod(
objectType, "DataPortal_Fetch", criteria);
DataPortalClient.IDataPortalProxy proxy;
proxy = GetDataPortalProxy(RunLocal(method));
Server.DataPortalContext dpContext =
new Server.DataPortalContext(GetPrincipal(),
proxy.IsServerRemote);
OnDataPortalInvoke(new DataPortalEventArgs(dpContext));
try
{
result = proxy.Fetch(objectType, criteria, dpContext);
}
catch (Server.DataPortalException ex)
{
result = ex.Result;
if (proxy.IsServerRemote)
{
ApplicationContext.SetGlobalContext(result.GlobalContext);
}
throw new DataPortalException("DataPortal.Fetch " +
Resources.Failed, ex.InnerException, result.ReturnObject);
}
if (proxy.IsServerRemote)
{
ApplicationContext.SetGlobalContext(result.GlobalContext);
}
OnDataPortalInvokeComplete(new DataPortalEventArgs(dpContext));
return(result.ReturnObject);
}
public static void Delete(object criteria)
{
Server.DataPortalResult result;
MethodInfo method = MethodCaller.GetMethod(
MethodCaller.GetObjectType(criteria), "DataPortal_Delete", criteria);
DataPortalClient.IDataPortalProxy proxy;
proxy = GetDataPortalProxy(RunLocal(method));
Server.DataPortalContext dpContext = new Server.DataPortalContext(GetPrincipal(), proxy.IsServerRemote);
OnDataPortalInvoke(new DataPortalEventArgs(dpContext));
try
{
result = proxy.Delete(criteria, dpContext);
}
catch (Server.DataPortalException ex)
{
result = ex.Result;
if (proxy.IsServerRemote)
{
ApplicationContext.SetGlobalContext(result.GlobalContext);
}
throw new DataPortalException(
String.Format("DataPortal.Delete {0} ({1})", Resources.Failed, ex.InnerException.InnerException),
ex.InnerException, result.ReturnObject);
}
if (proxy.IsServerRemote)
{
ApplicationContext.SetGlobalContext(result.GlobalContext);
}
OnDataPortalInvokeComplete(new DataPortalEventArgs(dpContext));
}
/// <summary>
/// Saves the specified item in the list.
/// </summary>
/// <param name="index">Index of item to be saved.</param>
/// <param name="delete">true if the item should be deleted.</param>
protected virtual async Task SaveItemAsync(int index, bool delete)
{
T item = this[index];
var handleBusy = false;
if ((item.IsDeleted || delete) || (item.IsValid && item.IsDirty))
{
T savable = item;
// attempt to clone object
ICloneable cloneable = savable as ICloneable;
if (cloneable != null)
{
savable = (T)cloneable.Clone();
MethodCaller.CallMethodIfImplemented(item, "MarkBusy");
handleBusy = true;
}
// commit all changes
int editLevel = savable.EditLevel;
for (int tmp = 1; tmp <= editLevel; tmp++)
{
savable.AcceptChanges(editLevel - tmp, false);
}
if (delete)
{
savable.Delete();
}
Exception error = null;
T result = default(T);
var dp = ApplicationContext.CreateInstance <DataPortal <T> >();
try
{
result = await dp.UpdateAsync((T)savable);
}
catch (AggregateException ex)
{
if (ex.InnerExceptions.Count > 0)
{
error = ex.InnerExceptions[0];
}
else
{
error = ex;
}
}
catch (Exception ex)
{
error = ex;
}
finally
{
if (handleBusy)
{
MethodCaller.CallMethodIfImplemented(item, "MarkIdle");
}
}
// update index - this may have changed under the duration of async call
index = IndexOf(item);
if (error == null && result != null)
{
if (savable.IsDeleted)
{
//SafeRemoveItem will raise INotifyCollectionChanged event
SafeRemoveItem(index);
}
else
{
for (int tmp = 1; tmp <= editLevel; tmp++)
{
result.CopyState(tmp, false);
}
SafeSetItem(index, result);
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, item, index));
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, this[index], index));
}
item.SaveComplete(result);
OnSaved(result, null);
}
else
{
item.SaveComplete(item);
OnSaved(item, error);
}
}
}
public static object Create(object criteria)
{
return(Create(MethodCaller.GetObjectType(criteria), criteria));
}
/// <summary>
/// Called by the business object's Save() method to
/// insert, update or delete an object in the database.
/// </summary>
/// <remarks>
/// Note that this method returns a reference to the updated business object.
/// If the server-side DataPortal is running remotely, this will be a new and
/// different object from the original, and all object references MUST be updated
/// to use this new object.
/// </remarks>
/// <param name="obj">A reference to the business object to be updated.</param>
/// <returns>A reference to the updated business object.</returns>
public static object Update(object obj)
{
Server.DataPortalResult result;
MethodInfo method;
string methodName;
if (obj is CommandBase)
{
methodName = "DataPortal_Execute";
}
else if (obj is Core.BusinessBase)
{
Core.BusinessBase tmp = (Core.BusinessBase)obj;
if (tmp.IsDeleted)
{
methodName = "DataPortal_DeleteSelf";
}
else
if (tmp.IsNew)
{
methodName = "DataPortal_Insert";
}
else
{
methodName = "DataPortal_Update";
}
}
else
{
methodName = "DataPortal_Update";
}
method = MethodCaller.GetMethod(obj.GetType(), methodName);
DataPortalClient.IDataPortalProxy proxy;
proxy = GetDataPortalProxy(RunLocal(method));
Server.DataPortalContext dpContext =
new Server.DataPortalContext(GetPrincipal(), proxy.IsServerRemote);
OnDataPortalInvoke(new DataPortalEventArgs(dpContext));
try
{
result = proxy.Update(obj, dpContext);
}
catch (Server.DataPortalException ex)
{
result = ex.Result;
if (proxy.IsServerRemote)
{
ApplicationContext.SetGlobalContext(result.GlobalContext);
}
throw new DataPortalException(
String.Format("DataPortal.Update {0} ({1})", Resources.Failed, ex.InnerException.InnerException),
ex.InnerException, result.ReturnObject);
}
if (proxy.IsServerRemote)
{
ApplicationContext.SetGlobalContext(result.GlobalContext);
}
OnDataPortalInvokeComplete(new DataPortalEventArgs(dpContext));
return(result.ReturnObject);
}
/// <summary>
/// Called by a factory method in a business class to retrieve
/// an object, which is loaded with values from the database.
/// </summary>
/// <param name="criteria">Object-specific criteria.</param>
/// <returns>An object populated with values from the database.</returns>
public static object Fetch(object criteria)
{
return(Fetch(MethodCaller.GetObjectType(criteria), criteria));
}
/// <summary>
/// Saves the specified item in the list.
/// </summary>
/// <param name="index">
/// Index of the item to be saved.
/// </param>
/// <remarks>
/// This method properly saves the child item,
/// by making sure the item in the collection
/// is properly replaced by the result of the
/// Save() method call.
/// </remarks>
public virtual void SaveItem(int index)
{
T item = this[index];
var handleBusy = false;
if (item.IsDeleted || (item.IsValid && item.IsDirty))
{
T savable = item;
// attempt to clone object
ICloneable cloneable = savable as ICloneable;
if (cloneable != null)
{
savable = (T)cloneable.Clone();
MethodCaller.CallMethodIfImplemented(item, "MarkBusy");
handleBusy = true;
}
// commit all changes
int editLevel = savable.EditLevel;
for (int tmp = 1; tmp <= editLevel; tmp++)
{
savable.AcceptChanges(editLevel - tmp, false);
}
// save object
DataPortal <T> dp = new DataPortal <T>();
dp.UpdateCompleted += (o, e) =>
{
if (handleBusy)
{
MethodCaller.CallMethodIfImplemented(item, "MarkIdle");
}
if (e.Error == null)
{
T result = e.Object;
if (item.IsDeleted)
{
//SafeRemoveItem will raise INotifyCollectionChanged event
SafeRemoveItem(index);
}
else
{
for (int tmp = 1; tmp <= editLevel; tmp++)
{
result.CopyState(tmp, false);
}
SafeSetItem(index, result);
#if SILVERLIGHT
//Because SL Data Grid does not support replace action.
// we have to artificially raise remove/insert events
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, item, index));
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, this[index], index));
#else
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Replace, result, item));
#endif
}
#if SILVERLIGHT
item.SaveComplete(result, null, null);
#else
item.SaveComplete(result);
#endif
OnSaved(result, null);
}
else
{
#if SILVERLIGHT
item.SaveComplete(item, e.Error, null);
#else
item.SaveComplete(item);
#endif
OnSaved(item, e.Error);
}
};
dp.BeginUpdate(savable);
}
}
