org.mentawai.core.ActionException Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of mentawai Show documentation

A Java full-stack web framework with programmatic configuration instead of XML and Annotations.

There is a newer version: 2.5.6

/*
 * Mentawai Web Framework http://mentawai.lohis.com.br/
 * Copyright (C) 2005  Sergio Oliveira Jr. ([email protected])
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
package org.mentawai.core;


/**
 * An exception that can happen when an action is executed.
 * 
 * @author Sergio Oliveira
 */
public class ActionException extends Exception {
	
	protected final Throwable rootCause;
	
	public ActionException() {
		super();
		
		this.rootCause = null;
		
	}
	
	public ActionException(Throwable e) {
		super(getMsg(e), e);
		Throwable root = getRootCause(e);
		this.setStackTrace(root.getStackTrace());
		
		this.rootCause = root == this ? null : root;
	}
	
	private static String getMsg(Throwable t) {
		
		Throwable root = getRootCause(t);
		
		String msg = root.getMessage();
		
		if (msg == null || msg.length() == 0) {
			
			msg = t.getMessage();
			
			if (msg == null || msg.length() == 0) return root.getClass().getName();
		}
		
		return msg;
	}
	
	public ActionException(String msg) {
		super(msg);
		
		this.rootCause = null;
	}
	
	public ActionException(String msg, Throwable e) {
		
		super(msg, e);
		Throwable root = getRootCause(e);
		this.setStackTrace(root.getStackTrace());
		
		this.rootCause = root == this ? null : root;
	}
	
	private static Throwable getRootCause(Throwable t) {
		
		Throwable root = t.getCause();
		
		if (root == null) return t;
		
		while(root.getCause() != null) {
			
			root = root.getCause();
		}
		
		return root;
		
	}	
	
	@Override
	public Throwable getCause() {
		
		return rootCause;
	}
}