/******************************************************************************* * Copyright (c) 2009-2011 Luaj.org. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. ******************************************************************************/ package org.luaj.vm2; /** * RuntimeException that is thrown and caught in response to a lua error. * <p> * {@link LuaError} is used wherever a lua call to {@code error()} * would be used within a script. * <p> * Since it is an unchecked exception inheriting from {@link RuntimeException}, * Java method signatures do notdeclare this exception, althoug it can * be thrown on almost any luaj Java operation. * This is analagous to the fact that any lua script can throw a lua error at any time. * <p> */ public class LuaError extends RuntimeException { private static final long serialVersionUID = 1L; protected int level; protected String fileline; protected String traceback; protected Throwable cause; public String getMessage() { if (traceback != null) return traceback; String m = super.getMessage(); if (m == null) return null; if (fileline != null) return fileline + " " + m; return m; } /** Construct LuaError when a program exception occurs. * <p> * All errors generated from lua code should throw LuaError(String) instead. * @param cause the Throwable that caused the error, if known. */ public LuaError(Throwable cause) { super( "vm error: "+cause ); this.cause = cause; this.level = 1; } /** * Construct a LuaError with a specific message. * * @param message message to supply */ public LuaError(String message) { super( message ); this.level = 1; } /** * Construct a LuaError with a message, and level to draw line number information from. * @param message message to supply * @param level where to supply line info from in call stack */ public LuaError(String message, int level) { super( message ); this.level = level; } /** * Get the cause, if any. */ public Throwable getCause() { return cause; } }