public void Intercept(IInvocation invocation)
{
string methodName = invocation.Method.Name;
Type typeofIDao = typeof(INpiDao <>);
Type entityType = invocation.Method.DeclaringType.GetInterface(typeofIDao.FullName).GetGenericArguments()[0];
// todo :对其单例化
ISqlCommandGenerator g = NpiServicesCollection.GetService <ISqlServerCommandGenerator>();
SqlCommandDescription d = g.Generate(invocation.Method, invocation.Arguments);
DebugLogger.Debug(d.ToString());
DapperParameters dp = new DapperParameters();
foreach (var p in d.Parameters)
{
dp[p.Key] = p.Value.Value;
}
object dbReturnedValue = null;
object handledValue = null;
DebugLogger.Debug("准备执行 Sql");
switch (d.Type)
{
case SqlCommandTypes.Insert:
case SqlCommandTypes.Update:
case SqlCommandTypes.Delete:
{
var executor = ServicesCollection.GetService <ISqlCommandExecutor>();
dbReturnedValue = executor.Execute(d.SqlCommand, dp, dbConnectionContext);
}
break;
case SqlCommandTypes.Select:
{
var querier = ServicesCollection.GetService <ISqlCommandQuerier>();
dbReturnedValue = querier.Select(entityType, d.SqlCommand, dp, dbConnectionContext);
}
break;
default:
break;
}
DebugLogger.Debug("Sql 执行完毕，开始处理结果集");
foreach (var handler in dbReturnValueHandlers)
{
if (!handler.CanHandle(invocation.Method, entityType))
{
continue;
}
handledValue = handler.Handle(invocation.Method, entityType, dbReturnedValue);
}
invocation.ReturnValue = handledValue;
DebugLogger.Debug("结果集处理完毕");
}
static NPIInterceptor()
{
dbReturnValueHandlers = ServicesCollection.GetServices <IDbReturnValueHandler>();
}