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/*
* MessagingException.java
* Copyright (C) 2002 The Free Software Foundation
*
* This file is part of GNU JavaMail, a library.
*
* GNU JavaMail is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNU JavaMail 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* As a special exception, if you link this library with other files to
* produce an executable, this library does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* This exception does not however invalidate any other reasons why the
* executable file might be covered by the GNU General Public License.
*/
package javax.mail;
import java.io.PrintStream;
import java.io.PrintWriter;
/**
* The base class for all exceptions thrown by the Messaging classes.
*
* @author <a href="mailto:dog@gnu.org">Chris Burdess</a>
* @version 1.3
*/
public class MessagingException
extends Exception
{
/*
* The next exception in the chain.
*/
private Exception nextException;
/**
* Constructs a MessagingException with no detail message.
*/
public MessagingException()
{
this(null, null);
}
/**
* Constructs a MessagingException with the specified detail message.
* @param message the detail message
*/
public MessagingException(String message)
{
this(message, null);
}
/**
* Constructs a MessagingException with the specified Exception and detail
* message. The specified exception is chained to this exception.
* @param message the detail message
* @param exception the embedded exception
*/
public MessagingException(String message, Exception exception)
{
super(message);
nextException = exception;
}
/**
* Get the next exception chained to this one.
* If the next exception is a MessagingException, the chain may extend
* further.
*/
public Exception getNextException()
{
return nextException;
}
/**
* Add an exception to the end of the chain.
* If the end is not a MessagingException, this exception cannot be added
* to the end.
* @param exception the new end of the Exception chain
* @return true if the this Exception was added, false otherwise.
*/
public synchronized boolean setNextException(Exception exception)
{
Object o;
for (o = this;
(o instanceof MessagingException) &&
((MessagingException)o).nextException!=null;
o = ((MessagingException)o).nextException);
if (o instanceof MessagingException)
{
((MessagingException)o).nextException = exception;
return true;
}
return false;
}
/**
* Produce the message, include the message from the nested exception
* if there is one.
*/
public String getMessage()
{
String message = super.getMessage();
if (nextException!=null)
{
StringBuffer buffer = new StringBuffer();
buffer.append(message);
buffer.append(";\n nested exception is: \n\t");
buffer.append(nextException.toString());
message = buffer.toString();
}
return message;
}
public void printStackTrace(PrintStream out)
{
super.printStackTrace(out);
if (nextException != null)
{
out.println("nested exception is:");
nextException.printStackTrace(out);
}
}
public void printStackTrace(PrintWriter out)
{
super.printStackTrace(out);
if (nextException != null)
{
out.println("nested exception is:");
nextException.printStackTrace(out);
}
}
}
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