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package com.sun.enterprise.appclient.jws.boot;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.StringSelection;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.ResourceBundle;
import javax.swing.JCheckBox;
import javax.swing.JDialog;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
/**
* Displays errors detected after Java Web Start has launched the
* Java Web Start-aware ACC but before the developer's client has
* launched. Such errors would normally go to the Java Web Start trace file
* or the Java Console (if either is enabled) but by default neither of those
* is turned on, with the result that the end-user has no information about
* such errors. The client would simply never start.
*
* @author tjquinn
*/
public class ErrorDisplayDialog {
private static final String LINE_SEP = System.getProperty("line.separator");
private static ResourceBundle rb;
/**
*Displays a dialog box reporting an error, listing the stack trace in
*a text box and allowing the user to copy the stack trace to the platform's
*clipboard before dismissing the dialog box.
*
*@param t the Throwable error detected and being reported
*@param rb a ResourceBundle containing localizable strings
*/
public static void showErrors(Throwable t, ResourceBundle rb) {
ErrorDisplayDialog.rb = rb;
/*
*The JOptionPane class will accept other Components as elements of
*the dialog box. Build a JTextArea containing the stack trace. Do not
*let the user edit the text.
*/
JTextArea stackTraceArea = new JTextArea();
stackTraceArea.setEditable(false);
stackTraceArea.setRows(16);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintStream ps = new PrintStream(baos);
t.printStackTrace(ps);
stackTraceArea.setText(baos.toString());
/*
*Place the text area inside a scroll pane.
*/
JScrollPane sp = new JScrollPane(stackTraceArea);
/*
*Build a check box for the user to click to copy the error information
*to the platform's clipboard.
*/
JCheckBox copyToClipboardCB = new JCheckBox(getString("jwsacc.errorDialog.copyToClipboardLabel"));
/*
*Display the dialog box that also contains the text area's scroll
*pane and the checkbox and then wait for the user to close it.
*/
boolean copyToClipboard = showDialog(
getString("jwsacc.errorDialog.mainMessage.1") +
LINE_SEP +
getString("jwsacc.errorDialog.mainMessage.2"),
sp,
copyToClipboardCB
);
if (copyToClipboard) {
Clipboard cb = Toolkit.getDefaultToolkit().getSystemClipboard();
StringSelection ss = new StringSelection(stackTraceArea.getText());
try {
cb.setContents(ss, null);
}
catch (Throwable e) {
/*
*If we cannot copy the text to the clipboard, tell the user that
*and suggest that he or she manually copy it.
*/
showDialog(
getString("jwsacc.errorDialog.errorCopyingMessage.1") +
LINE_SEP +
getString("jwsacc.errorDialog.errorCopyingMessage.2"),
sp,
null /* no checkbox this time */
);
}
}
}
/**
*Displays a dialog box with the specified main message and stack trace.
*@param mainMessage the string to display at the top of the dialog box introducing the stack trace
*@param sp the JScrollPane containing the text area
*@param copyToClipboardCB the JCheckBox to use - null if this is a report that copying itself failed
*@return whether the user wants to copy the error text to the clipboard
*/
private static boolean showDialog(
String mainMessage,
JScrollPane sp,
JCheckBox copyToClipboardCB) {
String close = getString("jwsacc.errorDialog.closeLabel");
Object [] displayElements = (copyToClipboardCB == null) ?
new Object[] {mainMessage, sp} :
new Object[] {mainMessage, sp, copyToClipboardCB};
JOptionPane pane = new JOptionPane(
displayElements,
JOptionPane.ERROR_MESSAGE,
JOptionPane.DEFAULT_OPTION,
null,
new String[] {close},
close);
JDialog dialog = pane.createDialog(null, getString("jwsacc.errorDialog.title"));
dialog.setResizable(true);
dialog.setVisible(true);
boolean result = (copyToClipboardCB == null ? false : copyToClipboardCB.isSelected());
dialog.dispose();
return result;
}
private static String getString(String key) {
return rb.getString(key);
}
} |
