@Test
public void testCastableFromUnderlying() throws SQLException {
Connection con = new TestConnectionImpl();
Connection proxy =
ConnectionWrapper.wrap(
con, noOpEventListener, ConnectionInformation.fromTestConnection(con));
// if the underlying object extends the class (or matches the class) then true should be
// returned.
assertTrue(proxy.isWrapperFor(TestConnectionImpl.class));
assertTrue(proxy.isWrapperFor(AbstractTestConnection.class));
}
@Test
public void testCastableFromProxy() throws SQLException {
Connection con = new TestConnectionImpl();
Connection proxy =
ConnectionWrapper.wrap(
con, noOpEventListener, ConnectionInformation.fromTestConnection(con));
// if the proxy implements the interface then true should be returned.
assertTrue(proxy.isWrapperFor(Connection.class));
assertTrue(proxy.isWrapperFor(TestConnection.class));
assertTrue(proxy.isWrapperFor(Wrapper.class));
}
@Test
public void testProxyOfWrappedConnection() throws SQLException {
// this will be the actual connection
Connection con = new TestConnectionImpl();
// use a wrapper from DBCP to create a proxy of a proxy
// Note: DBCP implements with JDBC 4.0 API so the Wrapper interface
// is implemented here.
DelegatingConnection underlying = new DelegatingConnection(con);
Connection proxy =
ConnectionWrapper.wrap(
underlying, noOpEventListener, ConnectionInformation.fromTestConnection(con));
// TestConnection is an interface of the wrapped underlying object.
assertTrue(proxy.isWrapperFor(TestConnection.class));
// ResultSet is not implemented at all - false should be returned
assertFalse(proxy.isWrapperFor(ResultSet.class));
}