1 /**
2 * Logback: the reliable, generic, fast and flexible logging framework.
3 * Copyright (C) 1999-2011, 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.util;
15
16 /**
17 * This implementation is intended for use in PatternLayout.
18 *
19 * @author Ceki Gülcü
20 */
21 public class RestrictedEscapeUtil implements IEscapeUtil {
22
23 public void escape(String escapeChars, StringBuffer buf, char next,
24 int pointer) {
25 if (escapeChars.indexOf(next) >= 0) {
26 buf.append(next);
27 } else {
28 // restitute the escape char (because it was consumed
29 // before this method was called).
30 buf.append("\\");
31 // restitute the next character
32 buf.append(next);
33 }
34 }
35
36
37 }