Java Wildcard to Regex wildcardToRegex(String wildcardPattern)

Description

wildcard To Regex

License

Apache License

Declaration

protected static String wildcardToRegex(String wildcardPattern) 

Method Source Code

//package com.java2s;
/*/*from  w w w.j  a  va2  s  . c  o  m*/
 * Copyright 2007 BoxySystems Inc. <siddique@boxysystems.com>
 *                  http://www.BoxySystems.com
 *
 * 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.
 */

public class Main {
    protected static String wildcardToRegex(String wildcardPattern) {

        if (wildcardPattern != null && (wildcardPattern.indexOf("*") != -1 || wildcardPattern.indexOf("?") != -1)) {
            StringBuffer buffer = new StringBuffer();
            char[] chars = wildcardPattern.toCharArray();

            for (char aChar : chars) {
                if (aChar == '*')
                    buffer.append(".*");
                else if (aChar == '?')
                    buffer.append(".");
                else if ("+()^$.{}[]|\\".indexOf(aChar) != -1)
                    buffer.append('\\').append(chars); // prefix all metacharacters with backslash
                else
                    buffer.append(aChar);
            }

            return buffer.toString();
        }
        return wildcardPattern;
    }
}

Related

1. wildcardToRegex(final String input)
2. wildcardToRegex(final String pattern)
3. wildcardToRegex(String toSearch, boolean supportSQLWildcard)
4. wildcardToRegex(String wildcard)
5. wildcardToRegex(String wildcard)
6. wildcardToRegexp(String globExp)
7. wildcardToRegexString(String wildcard)