/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.camel.commands.internal;
/**
* Util class.
*/
public final class RegexUtil {
private RegexUtil() {
}
/**
* convert a wild card containing * and ? to the equivalent regex
*
* @param wildcard wildcard string describing a file.
* @return regex string that could be fed to Pattern.compile
*/
public static String wildcardAsRegex(String wildcard) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < wildcard.length(); i++) {
final char c = wildcard.charAt(i);
switch (c) {
case '*':
sb.append(".*?");
break;
case '?':
sb.append(".");
break;
// chars that have magic regex meaning. They need quoting to be taken literally
case '$':
case '(':
case ')':
case '+':
case '-':
case '.':
case '[':
case '\\':
case ']':
case '^':
case '{':
case '|':
case '}':
sb.append('\\');
sb.append(c);
break;
default:
sb.append(c);
break;
}
}
return sb.toString();
}
}