/*
* Mojito Distributed Hash Table (Mojito DHT)
* Copyright (C) 2006-2007 LimeWire LLC
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.limewire.mojito.util;
/**
* Miscellaneous utilities for Exceptions.
*/
public class ExceptionUtils {
private ExceptionUtils() {}
/**
* Returns true if Throwable <tt>t</tt> was caused by an another
* Exception that is of type <tt>clazz</tt>.
*/
public static boolean isCausedBy(Throwable t, Class<? extends Throwable> clazz) {
return getCause(t, clazz) != null;
}
/**
* Returns the first Exception from the exception cause
* chain that is of type <tt>clazz</tt> or null if the
* given Throwable was not caused a such Exception.
*/
@SuppressWarnings("unchecked")
public static <T extends Throwable> T getCause(Throwable t, Class<T> clazz) {
while(t != null) {
if (clazz.isInstance(t)) {
return (T)t;
}
t = t.getCause();
}
return null;
}
}