/// <summary>
/// Register (add) a type handler for a type and dbType
/// </summary>
/// <param name="type">the type</param>
/// <param name="dbType">the dbType (optional, if dbType is null the handler will be used for all dbTypes)</param>
/// <param name="handler">the handler instance</param>
public void Register(Type type, string dbType, ITypeHandler handler)
{
HybridDictionary map = (HybridDictionary)_typeHandlerMap[type];
if (map == null)
{
map = new HybridDictionary();
_typeHandlerMap.Add(type, map);
}
if (dbType == null)
{
if (_logger.IsInfoEnabled)
{
// notify the user that they are no longer using one of the built-in type handlers
ITypeHandler oldTypeHandler = (ITypeHandler)map[NULL];
if (oldTypeHandler != null)
{
// the replacement will always(?) be a CustomTypeHandler
CustomTypeHandler customTypeHandler = handler as CustomTypeHandler;
string replacement = string.Empty;
if (customTypeHandler != null)
{
// report the underlying type
replacement = customTypeHandler.Callback.ToString();
}
else
{
replacement = handler.ToString();
}
// should oldTypeHandler be checked if its a CustomTypeHandler and if so report the Callback property ???
_logger.Info("Replacing type handler [" + oldTypeHandler.ToString() + "] with [" + replacement + "].");
}
}
map[NULL] = handler;
}
else
{
map.Add(dbType, handler);
}
}
/// <summary>
/// Deserialize a TypeHandler object
/// </summary>
/// <param name="node"></param>
/// <param name="configScope"></param>
/// <returns></returns>
public static void Deserialize(XmlNode node, ConfigurationScope configScope)
{
TypeHandler handler = new TypeHandler();
NameValueCollection prop = NodeUtils.ParseAttributes(node, configScope.Properties);
handler.CallBackName = NodeUtils.GetStringAttribute(prop, "callback");
handler.ClassName = NodeUtils.GetStringAttribute(prop, "type");
handler.DbType = NodeUtils.GetStringAttribute(prop, "dbType");
handler.Initialize();
configScope.ErrorContext.MoreInfo = "Check the callback attribute '" + handler.CallBackName + "' (must be a classname).";
ITypeHandler typeHandler = null;
Type type = configScope.SqlMapper.TypeHandlerFactory.GetType(handler.CallBackName);
object impl = Activator.CreateInstance( type );
if (impl is ITypeHandlerCallback)
{
typeHandler = new CustomTypeHandler((ITypeHandlerCallback) impl);
}
else if (impl is ITypeHandler)
{
typeHandler = (ITypeHandler) impl;
}
else
{
throw new ConfigurationException("The callBack type is not a valid implementation of ITypeHandler or ITypeHandlerCallback");
}
//
configScope.ErrorContext.MoreInfo = "Check the type attribute '" + handler.ClassName + "' (must be a class name) or the dbType '" + handler.DbType + "' (must be a DbType type name).";
if (handler.DbType!= null && handler.DbType.Length > 0)
{
configScope.DataExchangeFactory.TypeHandlerFactory.Register(TypeUtils.ResolveType(handler.ClassName), handler.DbType, typeHandler);
}
else
{
configScope.DataExchangeFactory.TypeHandlerFactory.Register(TypeUtils.ResolveType(handler.ClassName), typeHandler);
}
}
public void Register(Type type, string dbType, ITypeHandler handler)
{
HybridDictionary dictionary = (HybridDictionary)this._typeHandlerMap[type];
if (dictionary == null)
{
dictionary = new HybridDictionary();
this._typeHandlerMap.Add(type, dictionary);
}
if (dbType == null)
{
if (_logger.IsInfoEnabled)
{
ITypeHandler handler2 = (ITypeHandler)dictionary["_NULL_TYPE_"];
if (handler2 != null)
{
CustomTypeHandler handler3 = handler as CustomTypeHandler;
string str = string.Empty;
if (handler3 != null)
{
str = handler3.Callback.ToString();
}
else
{
str = handler.ToString();
}
_logger.Info("Replacing type handler [" + handler2.ToString() + "] with [" + str + "].");
}
}
dictionary["_NULL_TYPE_"] = handler;
}
else
{
dictionary.Add(dbType, handler);
}
}
