/*
* Copyright 2002-2016 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.integration.ip.util;
/**
* Regular Expression Utilities.
*
* @author Gary Russell
* @since 2.0
*/
public abstract class RegexUtils {
/**
* Escapes (precedes with \) any characters in the parameter in the set
* <p>
* <code>.$[]^*+{}()\?|</code>
* <p>
* Used to escape a string that is used as a regular expression pattern, to remove
* the special meaning of these characters.
* @param stringToEscape The string to escape.
* @return The escaped string.
*/
public static String escapeRegexSpecials(String stringToEscape) {
// In the following, we look for all the specials and any we find
// are escaped in the output string, allowing that string to
// be used as a pattern containing the literal specials.
String out = stringToEscape.replaceAll(
"(\\.|\\$|\\[|\\]|\\^|\\*|\\+|\\{|\\}|\\(|\\)|\\\\|\\?|\\|)",
"\\\\$1");
return out;
}
private RegexUtils() { }
}