1 /**
2 * Logback: the reliable, generic, fast and flexible logging framework.
3 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
4 *
5 * This program and the accompanying materials are dual-licensed under
6 * either the terms of the Eclipse Public License v1.0 as published by
7 * the Eclipse Foundation
8 *
9 * or (per the licensee's choosing)
10 *
11 * under the terms of the GNU Lesser General Public License version 2.1
12 * as published by the Free Software Foundation.
13 */
14 package ch.qos.logback.core.pattern;
15
16 /**
17 * Testing purposes only
18 */
19 public class ExceptionalConverter extends DynamicConverter<Object> {
20
21 public String convert(Object event) {
22 if (!isStarted()) {
23 throw new IllegalStateException("this converter must be started before use");
24 }
25 return "";
26 }
27 }