/*******************************************************************************
* Copyright (c) 2001, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.j2ee.internal;
import java.util.ArrayList;
import java.util.List;
/**
* Utility class to factor common code for implementers of IWrappedException
*/
public class ExceptionHelper {
/**
* Utility class; cannot be instantiated
*/
private ExceptionHelper() {
super();
}
/**
* Return the messages from @exception and all nested exceptions, in order from outermost to innermost
*/
public static java.lang.String[] getAllMessages(IWrappedException exception) {
List messages = new ArrayList(4);
messages.add(exception.getMessage());
Exception nested = exception.getNestedException();
while (nested != null) {
messages.add(nested.getMessage());
if (nested instanceof IWrappedException)
nested = ((IWrappedException)nested).getNestedException();
else
nested = null;
}
return (String[])messages.toArray(new String[messages.size()]);
}
/**
* Return the messages from @exception and all nested exceptions, in order from outermost to innermost,
* concatenated as one
*/
public static String getConcatenatedMessages(IWrappedException exception) {
String[] messages = getAllMessages(exception);
StringBuffer sb = new StringBuffer(256);
for (int i = 0; i < messages.length; i++){
sb.append(messages[i]);
if (i < messages.length-1)
sb.append('\n');
}
return sb.toString();
}
}