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//
// ========================================================================
// Copyright (c) 1995-2012 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.util;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.List;
/* ------------------------------------------------------------ */
/** Wraps multiple exceptions.
*
* Allows multiple exceptions to be thrown as a single exception.
*
*
*/
@SuppressWarnings("serial")
public class MultiException extends Exception
{
private Object nested;
/* ------------------------------------------------------------ */
public MultiException()
{
super("Multiple exceptions");
}
/* ------------------------------------------------------------ */
public void add(Throwable e)
{
if (e instanceof MultiException)
{
MultiException me = (MultiException)e;
for (int i=0;i<LazyList.size(me.nested);i++)
nested=LazyList.add(nested,LazyList.get(me.nested,i));
}
else
nested=LazyList.add(nested,e);
}
/* ------------------------------------------------------------ */
public int size()
{
return LazyList.size(nested);
}
/* ------------------------------------------------------------ */
public List<Throwable> getThrowables()
{
return LazyList.getList(nested);
}
/* ------------------------------------------------------------ */
public Throwable getThrowable(int i)
{
return (Throwable) LazyList.get(nested,i);
}
/* ------------------------------------------------------------ */
/** Throw a multiexception.
* If this multi exception is empty then no action is taken. If it
* contains a single exception that is thrown, otherwise the this
* multi exception is thrown.
* @exception Exception
*/
public void ifExceptionThrow()
throws Exception
{
switch (LazyList.size(nested))
{
case 0:
break;
case 1:
Throwable th=(Throwable)LazyList.get(nested,0);
if (th instanceof Error)
throw (Error)th;
if (th instanceof Exception)
throw (Exception)th;
default:
throw this;
}
}
/* ------------------------------------------------------------ */
/** Throw a Runtime exception.
* If this multi exception is empty then no action is taken. If it
* contains a single error or runtime exception that is thrown, otherwise the this
* multi exception is thrown, wrapped in a runtime exception.
* @exception Error If this exception contains exactly 1 {@link Error}
* @exception RuntimeException If this exception contains 1 {@link Throwable} but it is not an error,
* or it contains more than 1 {@link Throwable} of any type.
*/
public void ifExceptionThrowRuntime()
throws Error
{
switch (LazyList.size(nested))
{
case 0:
break;
case 1:
Throwable th=(Throwable)LazyList.get(nested,0);
if (th instanceof Error)
throw (Error)th;
else if (th instanceof RuntimeException)
throw (RuntimeException)th;
else
throw new RuntimeException(th);
default:
throw new RuntimeException(this);
}
}
/* ------------------------------------------------------------ */
/** Throw a multiexception.
* If this multi exception is empty then no action is taken. If it
* contains a any exceptions then this
* multi exception is thrown.
*/
public void ifExceptionThrowMulti()
throws MultiException
{
if (LazyList.size(nested)>0)
throw this;
}
/* ------------------------------------------------------------ */
@Override
public String toString()
{
if (LazyList.size(nested)>0)
return MultiException.class.getSimpleName()+
LazyList.getList(nested);
return MultiException.class.getSimpleName()+"[]";
}
/* ------------------------------------------------------------ */
@Override
public void printStackTrace()
{
super.printStackTrace();
for (int i=0;i<LazyList.size(nested);i++)
((Throwable)LazyList.get(nested,i)).printStackTrace();
}
/* ------------------------------------------------------------------------------- */
/**
* @see java.lang.Throwable#printStackTrace(java.io.PrintStream)
*/
@Override
public void printStackTrace(PrintStream out)
{
super.printStackTrace(out);
for (int i=0;i<LazyList.size(nested);i++)
((Throwable)LazyList.get(nested,i)).printStackTrace(out);
}
/* ------------------------------------------------------------------------------- */
/**
* @see java.lang.Throwable#printStackTrace(java.io.PrintWriter)
*/
@Override
public void printStackTrace(PrintWriter out)
{
super.printStackTrace(out);
for (int i=0;i<LazyList.size(nested);i++)
((Throwable)LazyList.get(nested,i)).printStackTrace(out);
}
}
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