Java example source code file (ExceptionEventSet.java)

This example Java source code file (ExceptionEventSet.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

exceptioneventset, jdi, locatableeventset, location, objectreference, override

The ExceptionEventSet.java Java example source code

/*
 * Copyright (c) 1999, 2011, 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.
 */

/*
 * This source code is provided to illustrate the usage of a given feature
 * or technique and has been deliberately simplified. Additional steps
 * required for a production-quality application, such as security checks,
 * input validation and proper error handling, might not be present in
 * this sample code.
 */


package com.sun.tools.example.debug.event;

import com.sun.jdi.*;
import com.sun.jdi.event.*;

public class ExceptionEventSet extends LocatableEventSet {

    private static final long serialVersionUID = 5328140167954640711L;

    ExceptionEventSet(EventSet jdiEventSet) {
        super(jdiEventSet);
    }

    /**
     * Gets the thrown exception object. The exception object is
     * an instance of 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 getException() {
        return ((ExceptionEvent)oneEvent).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. Also, 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.
     *
     * @return the {@link Location} where the exception will be caught or null if
     * the exception is uncaught.
     */
    public Location getCatchLocation() {
        return ((ExceptionEvent)oneEvent).catchLocation();
    }

    @Override
    public void notify(JDIListener listener) {
        listener.exception(this);
    }
}