Demonstrate simple use of the CachedRowSet
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import javax.sql.rowset.CachedRowSet;
/**
* Demonstrate simple use of the CachedRowSet. The RowSet family of interfaces
* is in JDK1.5, but the Implementation classes are (as of Beta 1) still in the
* unsupported "com.sun" package.
*/
public class CachedRowSetDemo {
public static final String ROWSET_IMPL_CLASS = "com.sun.rowset.CachedRowSetImpl";
public static void main(String[] args) throws Exception {
CachedRowSet rs;
// Create the class with class.forName to avoid importing
// from the unsupported com.sun packages.
Class c = Class.forName(ROWSET_IMPL_CLASS);
rs = (CachedRowSet) c.newInstance();
rs.setUrl("jdbc:postgresql:tmclub");
rs.setUsername("ian");
rs.setPassword("secret");
rs.setCommand("select * from members where name like ?");
rs.setString(1, "I%");
// This will cause the RowSet to connect, fetch its data, and
// disconnect
rs.execute();
// Some time later, the client tries to do something.
// Suppose we want to update data:
while (rs.next()) {
if (rs.getInt("id") == 42) {
rs.setString(1, "Marvin");
rs.updateRow(); // Normal JDBC
// This additional call tells the CachedRowSet to connect
// to its database and send the updated data back.
rs.acceptChanges();
}
}
// If we're all done...
rs.close();
}
}
Related examples in the same category
