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/*
* $Id: MBeanExceptionFormatter.java,v 1.4 2007/05/05 05:24:09 tcfujii Exp $
*/
package com.sun.enterprise.admin.mbeans;
import javax.management.MBeanException;
/**
* Helper class that formats the chained exception messages.
* The format of the returned message will be cause1(cause2(...)).
* It also initializes the cause of the MBeanException which otherwise
* is not initialized during MBeanException creation.
*/
public final class MBeanExceptionFormatter
{
/**
* This method returns an MBeanException instance with the message formatted
* as msg(msg1(msg2...)). It also inits the cause of the MBeanException.
* @param e The cause.
* @param msg
* @return A new instance of MBeanException.
*/
public static MBeanException toMBeanException( final Exception e,
final String msg )
{
final String s = getMessage(e, msg);
final Exception cause = (e != null) ? e : new Exception(s);
MBeanException mbe = new MBeanException(cause, s);
mbe.initCause(cause);
return mbe;
}
/**
* @param t
* @param cause1
* @return Returns the formatted message cause1(cause2(...))
*/
public static String getMessage(final Throwable t, final String cause1)
{
if (null == t) { return cause1; }
final String cause = t.getMessage();
final Throwable x = (t instanceof MBeanException) ?
((MBeanException)t).getTargetException() : t.getCause();
final String s = getMessage(x, cause);
return formatMessage(cause1, s);
}
private static String formatMessage(String a, String b)
{
final StringBuffer sb = new StringBuffer("");
boolean isValidA = (null != a) && (a.length() > 0);
boolean isValidB = (null != b) && (b.length() > 0);
if (isValidA) { sb.append(a); }
if (isValidA && isValidB) { sb.append('('); }
if (isValidB) { sb.append(b); }
if (isValidA && isValidB) { sb.append(')'); }
return sb.toString();
}
}