unwrap Method (SQLServerStatement)
Returns an object that implements the specified interface to allow access to the Microsoft SQL Server JDBC Driver-specific methods.
Nota
This feature is introduced starting with the Microsoft SQL Server JDBC Driver version 2.0.
public <T> T unwrap(Class<T> iface)
Parametri
iface
A class of type T defining an interface.
Valore restituito
An object that implements the specified interface.
Eccezioni
Osservazioni
The unwrap method is defined by the java.sql.Wrapper interface, which is introduced in the JDBC 4.0 Spec.
Applications might need to access extensions to the JDBC API that are specific to the Microsoft SQL Server JDBC Driver. The unwrap method supports unwrapping to public classes that this object extends, if the classes expose vendor extensions.
When this method is called, the object unwraps to the SQLServerStatement class.
For example code, see Esempio di aggiornamento di dati di grandi dimensioni, or unwrap Method (SQLServerCallableStatement).
Vedere anche
Riferimento
isWrapperFor Method (SQLServerStatement)
SQLServerStatement Class