commons-lang-1.0.1.jar - Apache Commons Lang

commons-lang-1.0.1.jar is the JAR file for Apache Commons Lang 1.0.1, which provides a host of helper utilities for the java.lang API.

JAR File Size and Download Location:

File name: commons-lang-1.0.1.jar
File size: 63980 bytes
Date modified: 11/22/2002
Download: Apache Commons Lang Website

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org/apache/commons/lang/exception/NestableException.java

package org.apache.commons.lang.exception;

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import java.io.PrintStream;
import java.io.PrintWriter;

/**
 * The base class of all exceptions which can contain other exceptions.
 *
 * It is intended to ease the debugging by carrying on the information
 * about the exception which was caught and provoked throwing the
 * current exception. Catching and rethrowing may occur multiple
 * times, and provided that all exceptions except the first one
 * are descendands of <code>NestedException</code>, when the
 * exception is finally printed out using any of the <code>
 * printStackTrace()</code> methods, the stacktrace will contain
 * the information about all exceptions thrown and caught on
 * the way.
 * <p> Running the following program
 * <p><blockquote><pre>
 *  1 import org.apache.commons.NestedException;
 *  2
 *  3 public class Test {
 *  4     public static void main( String[] args ) {
 *  5         try {
 *  6             a();
 *  7         } catch(Exception e) {
 *  8             e.printStackTrace();
 *  9         }
 * 10      }
 * 11
 * 12      public static void a() throws Exception {
 * 13          try {
 * 14              b();
 * 15          } catch(Exception e) {
 * 16              throw new NestedException("foo", e);
 * 17          }
 * 18      }
 * 19
 * 20      public static void b() throws Exception {
 * 21          try {
 * 22              c();
 * 23          } catch(Exception e) {
 * 24              throw new NestedException("bar", e);
 * 25          }
 * 26      }
 * 27
 * 28      public static void c() throws Exception {
 * 29          throw new Exception("baz");
 * 30      }
 * 31 }
 * </pre></blockquote>
 * <p>Yields the following stacktrace:
 * <p><blockquote><pre>
 * java.lang.Exception: baz: bar: foo
 *    at Test.c(Test.java:29)
 *    at Test.b(Test.java:22)
 * rethrown as NestedException: bar
 *    at Test.b(Test.java:24)
 *    at Test.a(Test.java:14)
 * rethrown as NestedException: foo
 *    at Test.a(Test.java:16)
 *    at Test.main(Test.java:6)
 * </pre></blockquote><br>
 *
 * @author <a href="mailto:Rafal.Krzewski@e-point.pl">Rafal Krzewski</a>
 * @author <a href="mailto:dlr@collab.net">Daniel Rall</a>
 * @author <a href="mailto:knielsen@apache.org">Kasper Nielsen</a>
 * @author <a href="mailto:steven@caswell.name">Steven Caswell</a>
 * @version $Id: NestableException.java,v 1.5 2002/09/29 08:20:52 bayard Exp $
 */
public class NestableException extends Exception implements Nestable
{
    /**
     * The helper instance which contains much of the code which we
     * delegate to.
     */
    protected NestableDelegate delegate = new NestableDelegate(this);

    /**
     * Holds the reference to the exception or error that caused
     * this exception to be thrown.
     */
    private Throwable cause = null;

    /**
     * Constructs a new <code>NestableException</code> without specified
     * detail message.
     */
    public NestableException()
    {
        super();
    }

    /**
     * Constructs a new <code>NestableException</code> with specified
     * detail message.
     *
     * @param msg The error message.
     */
    public NestableException(String msg)
    {
        super(msg);
    }

    /**
     * Constructs a new <code>NestableException</code> with specified
     * nested <code>Throwable</code>.
     *
     * @param cause the exception or error that caused this exception to be
     * thrown
     */
    public NestableException(Throwable cause)
    {
        super();
        this.cause = cause;
    }

    /**
     * Constructs a new <code>NestableException</code> with specified
     * detail message and nested <code>Throwable</code>.
     *
     * @param msg    the error message
     * @param cause  the exception or error that caused this exception to be
     * thrown
     */
    public NestableException(String msg, Throwable cause)
    {
        super(msg);
        this.cause = cause;
    }

    public Throwable getCause()
    {
        return cause;
    }

    public String getMessage()
    {
        return delegate.getMessage(super.getMessage());
    }

    public String getMessage(int index)
    {
        if (index == 0)
        {
            return super.getMessage();
        }
        else
        {
            return delegate.getMessage(index);
        }
    }
    
    public String[] getMessages()
    {
        return delegate.getMessages();
    }
    
    public Throwable getThrowable(int index)
    {
        return delegate.getThrowable(index);
    }
    
    public int getThrowableCount()
    {
        return delegate.getThrowableCount();
    }
    
    public Throwable[] getThrowables()
    {
        return delegate.getThrowables();
    }
    
    public int indexOfThrowable(Class type)
    {
        return delegate.indexOfThrowable(type, 0);
    }

    public int indexOfThrowable(Class type, int fromIndex)
    {
        return delegate.indexOfThrowable(type, fromIndex);
    }

    public void printStackTrace()
    {
        delegate.printStackTrace();
    }

    public void printStackTrace(PrintStream out)
    {
        delegate.printStackTrace(out);
    }

    public void printStackTrace(PrintWriter out)
    {
        delegate.printStackTrace(out);
    }

    public final void printPartialStackTrace(PrintWriter out)
    {
        super.printStackTrace(out);
    }
    
}

org/apache/commons/lang/exception/NestableException.java

 

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