Java example source code file (SAXException.java)

This example Java source code file (SAXException.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

exception, saxexception, string, throwable

The SAXException.java Java example source code

/*
 * Copyright (c) 2000, 2005, 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.
 */

// SAX exception class.
// http://www.saxproject.org
// No warranty; no copyright -- use this as you will.
// $Id: SAXException.java,v 1.3 2004/11/03 22:55:32 jsuttor Exp $

package org.xml.sax;

/**
 * Encapsulate a general SAX error or warning.
 *
 * <blockquote>
 * <em>This module, both source code and documentation, is in the
 * Public Domain, and comes with <strong>NO WARRANTY.
 * See <a href='http://www.saxproject.org'>http://www.saxproject.org
 * for further information.
 * </blockquote>
 *
 * <p>This class can contain basic error or warning information from
 * either the XML parser or the application: a parser writer or
 * application writer can subclass it to provide additional
 * functionality.  SAX handlers may throw this exception or
 * any exception subclassed from it.</p>
 *
 * <p>If the application needs to pass through other types of
 * exceptions, it must wrap those exceptions in a SAXException
 * or an exception derived from a SAXException.</p>
 *
 * <p>If the parser or application needs to include information about a
 * specific location in an XML document, it should use the
 * {@link org.xml.sax.SAXParseException SAXParseException} subclass.</p>
 *
 * @since SAX 1.0
 * @author David Megginson
 * @version 2.0.1 (sax2r2)
 * @see org.xml.sax.SAXParseException
 */
public class SAXException extends Exception {


    /**
     * Create a new SAXException.
     */
    public SAXException ()
    {
        super();
        this.exception = null;
    }


    /**
     * Create a new SAXException.
     *
     * @param message The error or warning message.
     */
    public SAXException (String message) {
        super(message);
        this.exception = null;
    }


    /**
     * Create a new SAXException wrapping an existing exception.
     *
     * <p>The existing exception will be embedded in the new
     * one, and its message will become the default message for
     * the SAXException.</p>
     *
     * @param e The exception to be wrapped in a SAXException.
     */
    public SAXException (Exception e)
    {
        super();
        this.exception = e;
    }


    /**
     * Create a new SAXException from an existing exception.
     *
     * <p>The existing exception will be embedded in the new
     * one, but the new exception will have its own message.</p>
     *
     * @param message The detail message.
     * @param e The exception to be wrapped in a SAXException.
     */
    public SAXException (String message, Exception e)
    {
        super(message);
        this.exception = e;
    }


    /**
     * Return a detail message for this exception.
     *
     * <p>If there is an embedded exception, and if the SAXException
     * has no detail message of its own, this method will return
     * the detail message from the embedded exception.</p>
     *
     * @return The error or warning message.
     */
    public String getMessage ()
    {
        String message = super.getMessage();

        if (message == null && exception != null) {
            return exception.getMessage();
        } else {
            return message;
        }
    }


    /**
     * Return the embedded exception, if any.
     *
     * @return The embedded exception, or null if there is none.
     */
    public Exception getException ()
    {
        return exception;
    }

    /**
     * Return the cause of the exception
     *
     * @return Return the cause of the exception
     */
    public Throwable getCause() {
        return exception;
    }

    /**
     * Override toString to pick up any embedded exception.
     *
     * @return A string representation of this exception.
     */
    public String toString ()
    {
        if (exception != null) {
            return super.toString() + "\n" + exception.toString();
        } else {
            return super.toString();
        }
    }



    //////////////////////////////////////////////////////////////////////
    // Internal state.
    //////////////////////////////////////////////////////////////////////


    /**
     * @serial The embedded exception if tunnelling, or null.
     */
    private Exception exception;

    // Added serialVersionUID to preserve binary compatibility
    static final long serialVersionUID = 583241635256073760L;
}

// end of SAXException.java