/**
* JBoss, Home of Professional Open Source
* Copyright 2009, JBoss Inc., and others contributors as indicated
* by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* (C) 2009, JBoss Inc.
*
* Contributors:
* IBM Corporation - initial API and implementation
*/
package org.jboss.tools.smooks.launch;
import java.io.StringWriter;
import java.lang.reflect.InvocationTargetException;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.MessageDialog;
import org.jboss.tools.smooks.configuration.SmooksConfigurationActivator;
/**
* The default exception handler shows an error dialog when one of its handle methods
* is called. If the passed exception is a <code>CoreException</code> an error dialog
* pops up showing the exception's status information. For a <code>InvocationTargetException</code>
* a normal message dialog pops up showing the exception's message. Additionally the exception
* is written to the platform log.
*
* TO DO: this class is duplicated from org.eclipse.jdt.ui
*/
public class ExceptionHandler {
private static ExceptionHandler fgInstance= new ExceptionHandler();
/**
* Handles the given <code>CoreException</code>. The workbench shell is used as a parent
* for the dialog window.
*
* @param e the <code>CoreException</code> to be handled
* @param title the dialog window's window title
* @param message message to be displayed by the dialog window
*/
public static void handle(CoreException e, String title, String message) {
handle(e, SmooksConfigurationActivator.getActiveWorkbenchShell(), title, message);
}
/**
* Handles the given <code>CoreException</code>.
*
* @param e the <code>CoreException</code> to be handled
* @param parent the dialog window's parent shell or <code>null</code>
* @param title the dialog window's window title
* @param message message to be displayed by the dialog window
*/
public static void handle(CoreException e, Shell parent, String title, String message) {
fgInstance.perform(e, parent, title, message);
}
/**
* Handles the given <code>InvocationTargetException</code>.
*
* @param e the <code>InvocationTargetException</code> to be handled
* @param parent the dialog window's parent shell or <code>null</code>
* @param title the dialog window's window title
* @param message message to be displayed by the dialog window
*/
public static void handle(InvocationTargetException e, Shell parent, String title, String message) {
fgInstance.perform(e, parent, title, message);
}
//---- Hooks for subclasses to control exception handling ------------------------------------
protected void perform(CoreException e, Shell shell, String title, String message) {
SmooksConfigurationActivator.log(e);
IStatus status= e.getStatus();
if (status != null) {
ErrorDialog.openError(shell, title, message, status);
} else {
displayMessageDialog(e.getMessage(), shell, title, message);
}
}
protected void perform(InvocationTargetException e, Shell shell, String title, String message) {
Throwable target= e.getTargetException();
if (target instanceof CoreException) {
perform((CoreException)target, shell, title, message);
} else {
SmooksConfigurationActivator.log(e);
if (e.getMessage() != null && e.getMessage().length() > 0) {
displayMessageDialog(e.getMessage(), shell, title, message);
} else {
displayMessageDialog(target.getMessage(), shell, title, message);
}
}
}
private void displayMessageDialog(String exceptionMessage, Shell shell, String title, String message) {
StringWriter msg= new StringWriter();
if (message != null) {
msg.write(message);
msg.write("\n\n"); //$NON-NLS-1$
}
if (exceptionMessage == null || exceptionMessage.length() == 0)
msg.write(Messages.ExceptionHandler_Exception_Msg);
else
msg.write(exceptionMessage);
MessageDialog.openError(shell, title, msg.toString());
}
}