911 lines
29 KiB
HTML
911 lines
29 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="ToolboxME for iSeries example: JdbcDemo.java" />
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<meta name="abstract" content="To create this example as a working ToolboxME for iSeries program, you need to copy the following .java file into a text or Java editor, make a few changes, then compile it." />
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<meta name="description" content="To create this example as a working ToolboxME for iSeries program, you need to copy the following .java file into a text or Java editor, make a few changes, then compile it." />
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<meta name="DC.Relation" scheme="URI" content="microfirstprog.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="microfirstprogcode" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>ToolboxME for iSeries example: JdbcDemo.java</title>
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</head>
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<body id="microfirstprogcode"><a name="microfirstprogcode"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">ToolboxME for iSeries example: JdbcDemo.java</h1>
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<div><p>To create this example as a working ToolboxME for iSeries™ program,
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you need to copy the following .java file into a text or Java™ editor,
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make a few changes, then compile it.</p>
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<div class="section"><p>To copy the source code, simply use your mouse to select all the Java code
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below, then right-click and select <strong>Copy</strong>. To paste the code into your
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editor, create a blank document in the editor, right-click the blank document
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and select <strong>Paste</strong>. Make sure to save the new document with the name
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JdbcDemo.java.</p>
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<p>After you create the .java file, return to the <a href="microfirstprog.htm#microfirstprog__createprogram">instructions for creating
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and running the example program</a>.</p>
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<div class="note"><span class="notetitle">Note:</span> Read the <a href="codedisclaimer.htm#codedisclaimer">Code
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example disclaimer</a> for important legal information.</div>
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<pre>//////////////////////////////////////////////////////////////////////////////////
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//
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// ToolboxME for iSeries example. This program demonstrates how your wireless
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// device can connect to an iSeries server and use JDBC to perform work on a
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// remote database.
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//
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//////////////////////////////////////////////////////////////////////////////////
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import java.sql.*; // SQL Interfaces provided by JdbcMe
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import com.ibm.as400.micro.*; // JdbcMe implementation
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import java.awt.*;
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import java.awt.event.*;
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import java.io.*;
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import javax.microedition.io.*; // Part of the CLDC specification
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import de.kawt.*; // Part of the CLDC specification
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class DemoConstants
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{
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// These constants are actually used mainly by the demo
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// for the JDBC driver. The Jdbc and JDBC application
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// creator IDs ( http://www.palmos.com/dev )
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// are reserved at palm computing.
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public static final int demoAppID = 0x4a444243; // JDBC
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// Make the dbCreator something else so that the
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// user can actually see the Palm DB seperately from
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// the JdbcDemo application.
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public static final int dbCreator = 0x4a444231; // JDB1
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public static final int dbType = 0x4a444231; // JDB1
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}
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/**
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* Little configuration dialog box to display the
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* current connections/statements, the
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* URL being used, user id and password
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*/
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class ConfigurationDialog extends Dialog implements ActionListener
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{
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TextField data;
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ConfigurationDialog(Frame w)
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{
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super(w, "Configuration");
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// Show/Modify current URL connection
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data = new TextField(JdbcDemo.mainFrame.jdbcPanel.url);
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add("Center", data);
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// Ok button.
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Panel panel = new Panel();
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Button button = new Button("Ok");
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button.addActionListener(this);
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panel.add(button);
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add("South", panel);
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pack();
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}
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public void actionPerformed(ActionEvent e)
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{
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JdbcDemo.mainFrame.jdbcPanel.url = data.getText();
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data = null;
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setVisible(false);
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}
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}
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/**
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* Little configuration dialog box to display the
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* current connections/statements, the
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* URL being used, user id and password
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*/
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class MultiChoiceDialog extends Dialog implements ActionListener
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{
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Choice task;
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ActionListener theListener;
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MultiChoiceDialog(Frame w, String title, String prompt, String choices[], ActionListener it)
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{
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super(w, title);
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theListener = it;
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// Show/Modify current URL connection
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Label txt = new Label(prompt);
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add("West", txt);
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task = new Choice();
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for (int i=0; i<choices.length; ++i)
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{
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task.add(choices[i]);
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}
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task.select(0);
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add("Center", task);
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// Ok button.
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Panel panel = new Panel();
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Button button = new Button("Ok");
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button.addActionListener(this);
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panel.add(button);
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button = new Button("Cancel");
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button.addActionListener(this);
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panel.add(button);
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add("South", panel);
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pack();
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}
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/**
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* Determine the action performed.
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**/
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public void actionPerformed(ActionEvent e)
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{
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int choice = task.getSelectedIndex();
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setVisible(false);
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if (e.getActionCommand().equals("Ok"))
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{
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if (theListener != null)
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{
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ActionEvent ev = new ActionEvent(this,
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ActionEvent.ACTION_PERFORMED,
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task.getItem(choice));
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theListener.actionPerformed(ev);
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}
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task = null;
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}
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else
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{
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// No-op
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}
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}
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}
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/**
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* The JdbcPanel is the main panel of the application.
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* It displays the current connection and statement
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* at the top.
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* A text field for entering SQL statements next.
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* A Results field for displaying each column of data
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* or results.
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* An task list and a 'go' button so that different
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* tasks can be tried.
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*/
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class JdbcPanel extends Panel implements ActionListener
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{
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public final static int TASK_EXIT = 0;
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public final static int TASK_NEW = 1;
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public final static int TASK_CLOSE = 2;
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public final static int TASK_EXECUTE = 3;
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public final static int TASK_PREV = 4;
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public final static int TASK_NEXT = 5;
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public final static int TASK_CONFIG = 6;
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public final static int TASK_TOPALMDB = 7;
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public final static int TASK_FROMPALMDB = 8;
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public final static int TASK_SETAUTOCOMMIT= 9;
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public final static int TASK_SETISOLATION = 10;
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public final static int TASK_COMMIT = 11;
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public final static int TASK_ROLLBACK = 12;
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// JDBC objects.
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java.sql.Connection connObject = null;
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Statement stmtObject = null;
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ResultSet rs = null;
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ResultSetMetaData rsmd = null;
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String lastErr = null;
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String url = null;
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Label connection = null;
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Label statement = null;
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TextField sql = null;
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List data = null;
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final Choice task;
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/**
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* Build the GUI.
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*/
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public JdbcPanel()
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{
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// The JDBC URL
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// Make sure to edit the following line so that it correctly specifies the
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// the MEServer and the iSeries server to which you want to connect.
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url = "jdbc:as400://mySystem;user=myUidl;password=myPwd;meserver=myMEServer;";
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Panel p1left = new Panel();
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p1left.setLayout(new BorderLayout());
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connection = new Label("None");
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p1left.add("West", new Label("Conn:"));
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p1left.add("Center", connection);
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Panel p1right = new Panel();
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p1right.setLayout(new BorderLayout());
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statement = new Label("None");
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p1right.add("West", new Label("Stmt:"));
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p1right.add("Center", statement);
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Panel p1 = new Panel();
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p1.setLayout(new GridLayout(1,2));
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p1.add(p1left);
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p1.add(p1right);
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Panel p2 = new Panel();
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p2.setLayout(new BorderLayout());
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p2.add("North", new Label("Sql:"));
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sql = new TextField(25);
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sql.setText("select * from QIWS.QCUSTCDT"); // Default query
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p2.add("Center", sql);
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Panel p3 = new Panel();
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p3.setLayout(new BorderLayout());
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data = new List();
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data.add("No Results");
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p3.add("North", new Label("Results:"));
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p3.add("Center", data);
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Panel p4 = new Panel();
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task = new Choice();
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task.add("Exit"); // TASK_EXIT
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task.add("New"); // TASK_NEW
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task.add("Close"); // TASK_CLOSE
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task.add("Execute"); // TASK_EXECUTE
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task.add("Prev"); // TASK_PREV
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task.add("Next"); // TASK_NEXT
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task.add("Config"); // TASK_CONFIGURE
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task.add("RS to PalmDB"); // TASK_TOPALMDB
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task.add("Query PalmDB"); // TASK_FROMPALMDB
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task.add("Set AutoCommit"); // TASK_SETAUTOCOMMIT
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task.add("Set Isolation"); // TASK_SETISOLATION
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task.add("Commit"); // TASK_COMMIT
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task.add("Rollback"); // TASK_ROLLBACK
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task.select(TASK_EXECUTE); // Start off here.
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p4.add("West", task);
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Button b = new Button("Go");
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b.addActionListener(this);
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p4.add("East", b);
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Panel prest = new Panel();
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prest.setLayout(new BorderLayout());
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prest.add("North", p2);
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prest.add("Center", p3);
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Panel pall = new Panel();
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pall.setLayout(new BorderLayout());
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pall.add("North", p1);
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pall.add("Center", prest);
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setLayout(new BorderLayout());
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add("Center", pall);
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add("South", p4);
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}
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/**
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* Do a task based on whichever task is
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* currently selected in the task list.
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*/
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public void actionPerformed(ActionEvent e)
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{
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if (e.getSource() instanceof MultiChoiceDialog)
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{
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String cmd = e.getActionCommand();
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processExtendedCommand(cmd);
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return;
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}
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switch (task.getSelectedIndex())
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{
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case TASK_EXIT:
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System.exit(0);
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break;
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case TASK_NEW:
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JdbcPanel.this.goNewItems();
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break;
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case TASK_PREV:
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JdbcPanel.this.goPrevRow();
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break;
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case TASK_NEXT:
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JdbcPanel.this.goNextRow();
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break;
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case TASK_EXECUTE:
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if (connObject == null || stmtObject == null)
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JdbcPanel.this.goNewItems();
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JdbcPanel.this.goExecute();
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break;
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case TASK_CONFIG:
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JdbcPanel.this.goConfigure();
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break;
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case TASK_CLOSE:
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JdbcPanel.this.goClose();
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break;
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case TASK_TOPALMDB:
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if (connObject == null || stmtObject == null)
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JdbcPanel.this.goNewItems();
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JdbcPanel.this.goResultsToPalmDB();
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break;
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case TASK_FROMPALMDB:
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JdbcPanel.this.goQueryFromPalmDB();
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break;
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case TASK_SETAUTOCOMMIT:
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JdbcPanel.this.goSetAutocommit();
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break;
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case TASK_SETISOLATION:
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JdbcPanel.this.goSetIsolation();
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break;
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case TASK_COMMIT:
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JdbcPanel.this.goTransact(true);
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break;
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case TASK_ROLLBACK:
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JdbcPanel.this.goTransact(false);
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break;
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default :
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{
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Dialog dialog = new FeedbackDialog(JdbcDemo.mainFrame, "Error", "Task not implemented");
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dialog.show();
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dialog = null;
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}
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}
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}
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public void processExtendedCommand(String cmd)
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{
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try
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{
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if (cmd.equals("true"))
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{
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connObject.setAutoCommit(true);
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return;
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}
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if (cmd.equals("false"))
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{
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|
|
connObject.setAutoCommit(false);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (cmd.equals("read uncommitted"))
|
||
|
|
{
|
||
|
|
connObject.setTransactionIsolation(java.sql.Connection.TRANSACTION_READ_UNCOMMITTED);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (cmd.equals("read committed"))
|
||
|
|
{
|
||
|
|
connObject.setTransactionIsolation(java.sql.Connection.TRANSACTION_READ_COMMITTED);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (cmd.equals("repeatable read"))
|
||
|
|
{
|
||
|
|
connObject.setTransactionIsolation(java.sql.Connection.TRANSACTION_REPEATABLE_READ);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (cmd.equals("serializable"))
|
||
|
|
{
|
||
|
|
connObject.setTransactionIsolation(java.sql.Connection.TRANSACTION_SERIALIZABLE);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
throw new IllegalArgumentException("Invalid command: " + cmd);
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
JdbcDemo.mainFrame.exceptionFeedback(e);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Perform commit or rollback processing.
|
||
|
|
*/
|
||
|
|
public void goTransact(boolean commit)
|
||
|
|
{
|
||
|
|
if (connObject == null)
|
||
|
|
{
|
||
|
|
FeedbackDialog dialog = new FeedbackDialog(JdbcDemo.mainFrame,
|
||
|
|
"Skip",
|
||
|
|
"Connection not allocated");
|
||
|
|
dialog.show();
|
||
|
|
dialog = null;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
try
|
||
|
|
{
|
||
|
|
if (commit)
|
||
|
|
connObject.commit();
|
||
|
|
else
|
||
|
|
connObject.rollback();
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
JdbcDemo.mainFrame.exceptionFeedback(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Prompt the user for setting the autocommit value
|
||
|
|
* Real work handled by the actionPerformed method
|
||
|
|
* calling processExtendedCommand().
|
||
|
|
*/
|
||
|
|
public void goSetAutocommit()
|
||
|
|
{
|
||
|
|
if (connObject == null)
|
||
|
|
{
|
||
|
|
FeedbackDialog dialog = new FeedbackDialog(JdbcDemo.mainFrame,
|
||
|
|
"Skip",
|
||
|
|
"Connection not allocated");
|
||
|
|
dialog.show();
|
||
|
|
dialog = null;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
try
|
||
|
|
{
|
||
|
|
String currentValue;
|
||
|
|
if (connObject.getAutoCommit())
|
||
|
|
currentValue = "Now: true";
|
||
|
|
else
|
||
|
|
currentValue = "Now: false";
|
||
|
|
|
||
|
|
Dialog dialog = new MultiChoiceDialog(JdbcDemo.mainFrame,
|
||
|
|
"Set Autocommit",
|
||
|
|
currentValue,
|
||
|
|
new String[]{ "true", "false"},
|
||
|
|
this);
|
||
|
|
dialog.show();
|
||
|
|
dialog = null;
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
JdbcDemo.mainFrame.exceptionFeedback(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Prompt the user for setting the isolation level,
|
||
|
|
* real work handled by the actionPerformed() method
|
||
|
|
* calling processExtendedCommand().
|
||
|
|
*/
|
||
|
|
public void goSetIsolation()
|
||
|
|
{
|
||
|
|
if (connObject == null)
|
||
|
|
{
|
||
|
|
FeedbackDialog dialog = new FeedbackDialog(JdbcDemo.mainFrame,
|
||
|
|
"Skip",
|
||
|
|
"Connection not allocated");
|
||
|
|
dialog.show();
|
||
|
|
dialog = null;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
try
|
||
|
|
{
|
||
|
|
int level = connObject.getTransactionIsolation();
|
||
|
|
String currentLevel;
|
||
|
|
switch (level)
|
||
|
|
{
|
||
|
|
case java.sql.Connection.TRANSACTION_READ_UNCOMMITTED:
|
||
|
|
currentLevel = "Now: read uncommitted";
|
||
|
|
break;
|
||
|
|
case java.sql.Connection.TRANSACTION_READ_COMMITTED:
|
||
|
|
currentLevel = "Now: read committed";
|
||
|
|
break;
|
||
|
|
case java.sql.Connection.TRANSACTION_REPEATABLE_READ:
|
||
|
|
currentLevel = "Now: repeatable read";
|
||
|
|
break;
|
||
|
|
case java.sql.Connection.TRANSACTION_SERIALIZABLE:
|
||
|
|
currentLevel = "Now: serializable";
|
||
|
|
break;
|
||
|
|
default : {
|
||
|
|
currentLevel = "error";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Dialog dialog = new MultiChoiceDialog(JdbcDemo.mainFrame,
|
||
|
|
"Set Isolation Level",
|
||
|
|
currentLevel,
|
||
|
|
new String[]{ "read uncommitted",
|
||
|
|
"read committed",
|
||
|
|
"repeatable read",
|
||
|
|
"serializable"},
|
||
|
|
this);
|
||
|
|
dialog.show();
|
||
|
|
dialog = null;
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
JdbcDemo.mainFrame.exceptionFeedback(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create a new connection or statement.
|
||
|
|
* Only one connection and statement is currently
|
||
|
|
* supported.
|
||
|
|
*/
|
||
|
|
public void goNewItems()
|
||
|
|
{
|
||
|
|
if (connObject != null || stmtObject != null)
|
||
|
|
{
|
||
|
|
FeedbackDialog dialog = new FeedbackDialog(JdbcDemo.mainFrame,
|
||
|
|
"Skip",
|
||
|
|
"Conn/Stmt already allocated");
|
||
|
|
dialog.show();
|
||
|
|
dialog = null;
|
||
|
|
}
|
||
|
|
if (connObject == null)
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
connObject = DriverManager.getConnection(url);
|
||
|
|
//connection.setText(Integer.toString(((JdbcMeConnection)connObject).getId()));
|
||
|
|
connection.repaint();
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
JdbcDemo.mainFrame.exceptionFeedback(e);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (stmtObject == null)
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
stmtObject = connObject.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
|
||
|
|
ResultSet.CONCUR_READ_ONLY);
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
// Try again... DB2 NT version 6.1 doesn't support
|
||
|
|
// Scollable result sets, so we'll assume other
|
||
|
|
// JDBC 2.0 databases don't either. We'll attempt
|
||
|
|
// to create another.
|
||
|
|
try
|
||
|
|
{
|
||
|
|
stmtObject = connObject.createStatement();
|
||
|
|
}
|
||
|
|
catch (Exception ex)
|
||
|
|
{
|
||
|
|
// If the second try failed, rethrow the
|
||
|
|
// first exception. Its probably
|
||
|
|
// a more meaninful error.
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
FeedbackDialog dialog = new FeedbackDialog(JdbcDemo.mainFrame,
|
||
|
|
"2nd try worked",
|
||
|
|
"Non-scrollable result set");
|
||
|
|
dialog.show();
|
||
|
|
dialog = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
statement.repaint();
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
JdbcDemo.mainFrame.exceptionFeedback(e);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Close the statement and connection.
|
||
|
|
**/
|
||
|
|
public void goClose()
|
||
|
|
{
|
||
|
|
// Close the statement.
|
||
|
|
if (stmtObject != null)
|
||
|
|
{
|
||
|
|
if (rs != null)
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
rs.close();
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
rs = null;
|
||
|
|
rsmd = null;
|
||
|
|
}
|
||
|
|
try
|
||
|
|
{
|
||
|
|
stmtObject.close();
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
stmtObject = null;
|
||
|
|
statement.setText("None");
|
||
|
|
statement.repaint();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Clost the connection.
|
||
|
|
if (connObject != null)
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
connObject.close();
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
connObject = null;
|
||
|
|
connection.setText("None");
|
||
|
|
connection.repaint();
|
||
|
|
}
|
||
|
|
data.removeAll();
|
||
|
|
data.add("No Results");
|
||
|
|
data.repaint();
|
||
|
|
sql.repaint();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* display the configuration dialog.
|
||
|
|
**/
|
||
|
|
public void goConfigure()
|
||
|
|
{
|
||
|
|
// Note there is no model dialog support in KAWT, this only
|
||
|
|
// works because the data to be changed (url) is set before
|
||
|
|
// this dialog is used, and the user cannot access the
|
||
|
|
// main frame while this is up on the palm (i.e. all dialogs
|
||
|
|
// in Kawt are modal).
|
||
|
|
ConfigurationDialog dialog = new ConfigurationDialog(JdbcDemo.mainFrame);
|
||
|
|
dialog.show();
|
||
|
|
dialog = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Execute the specified query.
|
||
|
|
**/
|
||
|
|
public void goExecute()
|
||
|
|
{
|
||
|
|
// Get the currently selected statement.
|
||
|
|
try
|
||
|
|
{
|
||
|
|
if (rs != null)
|
||
|
|
rs.close();
|
||
|
|
|
||
|
|
rs = null;
|
||
|
|
rsmd = null;
|
||
|
|
boolean results = stmtObject.execute(sql.getText());
|
||
|
|
if (results)
|
||
|
|
{
|
||
|
|
rs = stmtObject.getResultSet();
|
||
|
|
rsmd = rs.getMetaData();
|
||
|
|
// Show the first row
|
||
|
|
goNextRow();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
data.removeAll();
|
||
|
|
data.add(stmtObject.getUpdateCount() + " rows updated");
|
||
|
|
data.repaint();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
JdbcDemo.mainFrame.exceptionFeedback(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Move to the next row in the result set.
|
||
|
|
**/
|
||
|
|
public void goNextRow()
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
if (rs == null || rsmd == null)
|
||
|
|
return;
|
||
|
|
|
||
|
|
int count = rsmd.getColumnCount();
|
||
|
|
int i;
|
||
|
|
data.removeAll();
|
||
|
|
if (!rs.next())
|
||
|
|
data.add("End of data");
|
||
|
|
else
|
||
|
|
{
|
||
|
|
for (i=1; i>=count; ++i)
|
||
|
|
{
|
||
|
|
data.add(rs.getString(i));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
data.repaint();
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
JdbcDemo.mainFrame.exceptionFeedback(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Move to the previous row in the result set.
|
||
|
|
**/
|
||
|
|
public void goPrevRow()
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
if (rs == null || rsmd == null)
|
||
|
|
return;
|
||
|
|
|
||
|
|
int count = rsmd.getColumnCount();
|
||
|
|
int i;
|
||
|
|
data.removeAll();
|
||
|
|
if (!rs.previous())
|
||
|
|
data.add("Start of data");
|
||
|
|
else
|
||
|
|
{
|
||
|
|
for (i=1; i<=count; ++i)
|
||
|
|
{
|
||
|
|
data.add(rs.getString(i));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
data.repaint();
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
JdbcDemo.mainFrame.exceptionFeedback(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Perform a query and store the results in the local devices database
|
||
|
|
**/
|
||
|
|
public void goResultsToPalmDB()
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
if (stmtObject == null)
|
||
|
|
{
|
||
|
|
FeedbackDialog dialog = new FeedbackDialog(JdbcDemo.mainFrame, "Skip", "No Statement");
|
||
|
|
dialog.show();
|
||
|
|
dialog = null;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
boolean results =
|
||
|
|
((JdbcMeStatement)stmtObject).executeToOfflineData(sql.getText(),
|
||
|
|
"JdbcResultSet",
|
||
|
|
DemoConstants.dbCreator,
|
||
|
|
DemoConstants.dbType);
|
||
|
|
if (!results)
|
||
|
|
{
|
||
|
|
FeedbackDialog dialog = new FeedbackDialog(JdbcDemo.mainFrame, "No Data", "Not a query");
|
||
|
|
dialog.show();
|
||
|
|
dialog = null;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
data.removeAll();
|
||
|
|
data.add("Updated Palm DB 'JdbcResultSet'");
|
||
|
|
data.repaint();
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
JdbcDemo.mainFrame.exceptionFeedback(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Perform a query from the database that resides on the palm device.
|
||
|
|
**/
|
||
|
|
public void goQueryFromPalmDB()
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
if (rs != null)
|
||
|
|
{
|
||
|
|
rs.close();
|
||
|
|
rs = null;
|
||
|
|
}
|
||
|
|
rs = new JdbcMeOfflineResultSet ("JdbcResultSet",
|
||
|
|
DemoConstants.dbCreator,
|
||
|
|
DemoConstants.dbType);
|
||
|
|
rsmd = rs.getMetaData();
|
||
|
|
// If we want to debug some output, this
|
||
|
|
// method can be used to dump the contents
|
||
|
|
// of the PalmDB represented by the result set
|
||
|
|
// (Uses System.out so its mostly useful in
|
||
|
|
// the Palm emulator when debugging your
|
||
|
|
// applications.
|
||
|
|
// ((JdbcMeOfflineResultSet)rs).dumpDB(true);
|
||
|
|
|
||
|
|
// show the first row.
|
||
|
|
goNextRow();
|
||
|
|
}
|
||
|
|
catch (SQLException e)
|
||
|
|
{
|
||
|
|
JdbcDemo.mainFrame.exceptionFeedback(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public class JdbcDemo extends Frame
|
||
|
|
{
|
||
|
|
/** An ActionListener that ends the application. Only
|
||
|
|
* one is required, and can be reused
|
||
|
|
*/
|
||
|
|
private static ActionListener exitActionListener = null;
|
||
|
|
/**
|
||
|
|
* The main application in this process.
|
||
|
|
*/
|
||
|
|
static JdbcDemo mainFrame = null;
|
||
|
|
|
||
|
|
JdbcPanel jdbcPanel = null;
|
||
|
|
|
||
|
|
public static ActionListener getExitActionListener()
|
||
|
|
{
|
||
|
|
if (exitActionListener == null)
|
||
|
|
{
|
||
|
|
exitActionListener = new ActionListener()
|
||
|
|
{
|
||
|
|
public void actionPerformed(ActionEvent e)
|
||
|
|
{
|
||
|
|
System.exit(0);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
return exitActionListener;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Demo Constructor
|
||
|
|
**/
|
||
|
|
public JdbcDemo()
|
||
|
|
{
|
||
|
|
super("Jdbc Demo");
|
||
|
|
setLayout(new BorderLayout());
|
||
|
|
|
||
|
|
jdbcPanel = new JdbcPanel();
|
||
|
|
add("Center", jdbcPanel);
|
||
|
|
|
||
|
|
addWindowListener(new WindowAdapter()
|
||
|
|
{
|
||
|
|
public void windowClosing(WindowEvent e)
|
||
|
|
{
|
||
|
|
System.exit(0);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
setSize(200,300);
|
||
|
|
pack();
|
||
|
|
}
|
||
|
|
|
||
|
|
public void exceptionFeedback(Exception e)
|
||
|
|
{
|
||
|
|
Dialog dialog = new FeedbackDialog(JdbcDemo.mainFrame, e);
|
||
|
|
dialog.show();
|
||
|
|
dialog = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Main method.
|
||
|
|
**/
|
||
|
|
public static void main(String args[])
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
mainFrame = new JdbcDemo();
|
||
|
|
mainFrame.show();
|
||
|
|
mainFrame.jdbcPanel.goConfigure();
|
||
|
|
}
|
||
|
|
catch (Exception e)
|
||
|
|
{
|
||
|
|
System.exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div>
|
||
|
|
<div class="familylinks">
|
||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="microfirstprog.htm" title="This information will enable you to edit, compile, and run the example ToolboxME for iSeries program.">Creating and running a ToolboxME for iSeries program</a></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|