/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2013, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.classic.pattern;
import ch.qos.logback.classic.PatternLayout;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.CoreConstants;
/**
* Always returns an empty string.
* <p>
* This converter is useful to pretend that the converter chain for
* PatternLayout actually handles exceptions, when in fact it does not.
* By adding %nopex to the conversion pattern, the user can bypass
* the automatic addition of %ex conversion pattern for patterns
* which do not contain a converter handling exceptions.
*
* <p>Users can ignore the existence of this converter, unless they
* want to suppress the automatic printing of exceptions by
* {@link PatternLayout}.
*
* @author Ceki Gülcü
*/
public class NopThrowableInformationConverter extends ThrowableHandlingConverter {
public String convert(ILoggingEvent event) {
return CoreConstants.EMPTY_STRING;
}
}