/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
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* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
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* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
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*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
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*
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/*
* $Header: /cvs/glassfish/appserv-api/src/java/com/sun/appserv/management/util/misc/ExceptionUtil.java,v 1.3 2007/05/05 05:31:05 tcfujii Exp $
* $Revision: 1.3 $
* $Date: 2007/05/05 05:31:05 $
*/
package com.sun.appserv.management.util.misc;
import java.util.ArrayList;
/**
Useful utilities for Exceptions
*/
public final class ExceptionUtil
{
private
ExceptionUtil()
{
// disallow instantiation
}
public static String
getStackTrace()
{
return toString(new Exception("STACK TRACE"));
}
public static String
toString( final Throwable t )
{
final String SEP = System.getProperty( "line.separator" );
final Throwable rootCause = getRootCause( t );
return rootCause.getClass().getName() + ": " +
StringUtil.quote( rootCause.getMessage() ) + SEP +
getStackTrace( rootCause );
}
/**
Get the chain of exceptions via getCause(). The first element is the
Exception passed.
@param start the Exception to traverse
@return a Throwable[] or an Exception[] as appropriate
*/
public static Throwable[]
getCauses( final Throwable start )
{
final ArrayList<Throwable> list = new ArrayList<Throwable>();
boolean haveNonException = false;
Throwable t = start;
while ( t != null )
{
list.add( t );
if ( ! ( t instanceof Exception ) )
{
haveNonException = true;
}
final Throwable temp = t.getCause();
if ( temp == null )
break;
t = temp;
}
final Throwable[] results = haveNonException ?
new Throwable[ list.size() ] : new Exception[ list.size() ];
list.toArray( results );
return( results );
}
/**
Get the original troublemaker.
@param e the Exception to dig into
@return the original Throwable that started the problem
*/
public static Throwable
getRootCause( final Throwable e )
{
final Throwable[] causes = getCauses( e );
return( causes[ causes.length - 1 ] );
}
/**
Get the stack trace as a String.
@param t the Throwabe whose stack trace should be gotten
@return a String containing the stack trace
*/
public static String
getStackTrace( Throwable t )
{
final StringBuffer buf = new StringBuffer();
final StackTraceElement[] elems = t.getStackTrace();
for( int i = 0; i < elems.length; ++i )
{
buf.append( elems[ i ] );
buf.append( "\n" );
}
return( buf.toString() );
}
}
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