/* * Copyright (c) 1998, 1999, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.jdi.event; import com.sun.jdi.*; /** * Notification of an exception in the target VM. When an exception * is thrown which satisfies a currently enabled * {@link com.sun.jdi.request.ExceptionRequest exception request}, * an {@link EventSet event set} * containing an instance of this class will be added * to the VM's event queue. * If the exception is thrown from a non-native method, * the exception event is generated at the location where the * exception is thrown. * If the exception is thrown from a native method, the exception event * is generated at the first non-native location reached after the exception * is thrown. * * @author Robert Field * @since  1.3 */public interface ExceptionEvent extends LocatableEvent {     /**     * Gets the thrown exception object. The exception object is     * an instance of {@link java.lang.Throwable} or a subclass in the     * target VM.     *     * @return an {@link ObjectReference} which mirrors the thrown object in     * the target VM.     */    public ObjectReference exception();     /**     * Gets the location where the exception will be caught. An exception     * is considered to be caught if, at the point of the throw, the     * current location is dynamically enclosed in a try statement that     * handles the exception. (See the JVM specification for details).     * If there is such a try statement, the catch location is the     * first code index of the appropriate catch clause.     * <p>     * If there are native methods in the call stack at the time of the     * exception, there are important restrictions to note about the     * returned catch location. In such cases,     * it is not possible to predict whether an exception will be handled     * by some native method on the call stack.     * Thus, it is possible that exceptions considered uncaught     * here will, in fact, be handled by a native method and not cause     * termination of the target VM. Furthermore, it cannot be assumed that the     * catch location returned here will ever be reached by the throwing     * thread. If there is     * a native frame between the current location and the catch location,     * the exception might be handled and cleared in that native method     * instead.     * <p>     * Note that the compiler can generate try-catch blocks in some cases     * where they are not explicit in the source code; for example,     * the code generated for <code>synchronized</code> and     * <code>finally</code> blocks can contain implicit try-catch blocks.     * If such an implicitly generated try-catch is     * present on the call stack at the time of the throw, the exception     * will be considered caught even though it appears to be uncaught from     * examination of the source code.     *     * @return the {@link Location} where the exception will be caught or null if     * the exception is uncaught.     */    public Location catchLocation();}