public interface OlapWrapper
OlapWrapper duplicates the functionality of the
java.sql.Wrapper interface (introduced in JDBC 4.0), making
this functionality available to olap4j clients running in a JDBC 3.0
environment. For code which will run only on JDBC 4.0 and later, Wrapper can
be used, and OlapWrapper can be ignored.
In JDBC 3.0 (JDK 1.5) and earlier, the OlapWrapper interface
is used to convert a JDBC class to the corresponding olap4j class. For
instance, write
import java.sql.Connection;
import java.sql.DriverManager;
import org.olap4j.OlapConnection;
import org.olap4j.OlapWrapper;
Connection connection = DriverManager.getConnection("jdbc: ...");
OlapWrapper wrapper = (OlapWrapper) connection;
OlapConnection olapConnection = wrapper.unwrap(OlapConnection.class);
to create a JDBC 3.0 connection and convert it to an olap4j connection.
In JDBC 4.0 (JDK 1.6) and later, you don't need to use this class. All of
the key JDBC classes implement java.sql.Wrapper interface, so
you can use its isWrapper and unwrap methods
without casting. For instance, write
import java.sql.Connection;
import java.sql.DriverManager;
import org.olap4j.OlapConnection;
Connection connection = DriverManager.getConnection("jdbc: ...");
OlapConnection olapConnection = connection.unwrap(OlapConnection.class);
to create a JDBC 4.0 connection and convert it to an olap4j connection.| Modifier and Type | Method and Description |
|---|---|
boolean |
isWrapperFor(Class<?> iface) |
<T> T |
unwrap(Class<T> iface) |
<T> T unwrap(Class<T> iface) throws SQLException
SQLExceptionboolean isWrapperFor(Class<?> iface) throws SQLException
SQLException