WebRowSet via WebRowSetImpl

Description

package com.oracle.tutorial.jdbc;

import com.sun.rowset.CachedRowSetImpl;

import com.sun.rowset.WebRowSetImpl;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.sql.Connection;
import java.sql.SQLException;

import javax.sql.rowset.;

public class WebRowSetSample {

    private String dbName;
    private Connection con;
    private String dbms;
    private JDBCTutorialUtilities settings;

    public WebRowSetSample(Connection connArg,
            JDBCTutorialUtilities settingsArg) {
        super();
        this.con = connArg;
        this.dbName = settingsArg.dbName;
        this.dbms = settingsArg.dbms;
        this.settings = settingsArg;
    }

    public void testWebRowSet() throws SQLException, IOException {
        FileReader fReader = null;
        FileWriter fWriter = null;
        String priceListFileName = "pricelist.xml";
        int[] keyCols = { 1 };
        WebRowSet priceList = new WebRowSetImpl();

        priceList.setUsername(settings.userName);
        priceList.setPassword(settings.password);
        priceList.setUrl(settings.urlString);
        priceList.setCommand("select COF_NAME, PRICE from COFFEES");
        priceList.setKeyColumns(keyCols);

        // Populate the WebRowSet
        priceList.execute();
        System.out.println("Size of the WebRowSet is: " + priceList.size());

        // Insert a new row
        priceList.moveToInsertRow();
        priceList.updateString("COF_NAME", "Kona");
        priceList.updateFloat("PRICE", 8.99f);
        priceList.insertRow();
        priceList.moveToCurrentRow();
        System.out.println("New row inserted");
        System.out.println("Size of the WebRowSet is: " + priceList.size());

        //Delete the row with "Espresso"
        priceList.beforeFirst();
        while (priceList.next()) {
            if (priceList.getString(1).equals("Espresso")) {
                System.out.println("Deleting row with Espresso...");
                priceList.deleteRow();
                break;
            }
        }

        // Update price of Colombian
        priceList.beforeFirst();
        while (priceList.next()) {
            if (priceList.getString(1).equals("Colombian")) {
                System.out.println("Updating row with Colombian...");
                priceList.updateFloat(2, 6.99f);
                priceList.updateRow();
                break;
            }
        }

        int size1 = priceList.size();
        fWriter = new FileWriter(priceListFileName);
        priceList.writeXml(fWriter);
        fWriter.flush();
        fWriter.close();

        // Create the receiving WebRowSet object
        WebRowSet receiver = new WebRowSetImpl();
        receiver.setUrl(settings.urlString);
        receiver.setUsername(settings.userName);
        receiver.setPassword(settings.password);

        //Now read the XML file.
        fReader = new FileReader(priceListFileName);
        receiver.readXml(fReader);
        int size2 = receiver.size();
        if (size1 == size2) {
            System.out.println("WebRowSet serialized and "
                    + "deserialiazed properly");
        } else {
            System.out
                    .println("Error....serializing/deserializng the WebRowSet");
        }
    }

    public static void main(String[] args) {
        JDBCTutorialUtilities myJDBCTutorialUtilities;
        Connection myConnection = null;

        if (args[0] == null) {
            System.err
                    .println("Properties file not specified at command line");
            return;
        } else {
            try {
                myJDBCTutorialUtilities = new JDBCTutorialUtilities(args[0]);
            } catch (Exception e) {
                System.err.println("Problem reading properties file "
                        + args[0]);
                e.printStackTrace();
                return;
            }
        }

        try {
            myConnection = myJDBCTutorialUtilities.getConnection();

            // Java DB does not have an SQL create database command; it does require createDatabase

            WebRowSetSample myWebRowSetSample = new WebRowSetSample(
                    myConnection, myJDBCTutorialUtilities);
            myWebRowSetSample.testWebRowSet();

        } catch (SQLException e) {
            JDBCTutorialUtilities.printSQLException(e);
        } catch (Exception ex) {
            System.out.println("Unexpected exception");
            ex.printStackTrace();
        }

        finally {
            JDBCTutorialUtilities.closeConnection(myConnection);
        }

    }

}

/*
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 *
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 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - 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.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 */
WebRowSet via WebRowSetImpl - Java JDBC

Description

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