Java Wildcard to Regex wildcardToRegex(String wildcard)

Description

wildcard To Regex

License

Open Source License

Declaration

public static String wildcardToRegex(String wildcard) 

Method Source Code

//package com.java2s;
/**/*from w  w w .  j  a  v  a  2 s. co m*/
 * @author Nigel Cook
 *
 * (C) Copyright 2010-2012. Nigel Cook. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Licensed under the terms described in LICENSE file that accompanied this code, (the "License"); you may not use this file
 * except in compliance with the License. 
 * 
 *  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 {
    public static String wildcardToRegex(String wildcard) {
        StringBuffer s = new StringBuffer(wildcard.length());
        boolean alternation = false;
        for (int i = 0, is = wildcard.length(); i < is; i++) {
            char c = wildcard.charAt(i);
            switch (c) {
            case '*':
                s.append(".*");
                break;
            case '?':
                s.append(".");
                break;
            // escape special regexp-characters
            case '(':
            case ')':
            case '$':
            case '[':
            case ']':
            case '^':
            case '.':
            case '|':
            case '\\':
                s.append("\\");
                s.append(c);
                break;
            case '{':
                if (alternation)
                    s.append("\\{");
                else
                    s.append("(");
                alternation = true;
                break;
            case ',':
                if (alternation)
                    s.append("|");
                else
                    s.append(",");
                break;
            case '}':
                if (alternation)
                    s.append(")");
                else
                    s.append("\\}");
                alternation = false;
                break;
            default:
                s.append(c);
                break;
            }
        }
        s.append('$');
        return (s.toString());
    }
}

Related

1. wildcardToJavaRegexp(String expr)
2. wildcardToRegex(CharSequence s)
3. wildcardToRegex(final String input)
4. wildcardToRegex(final String pattern)
5. wildcardToRegex(String toSearch, boolean supportSQLWildcard)
6. wildcardToRegex(String wildcard)
7. wildcardToRegex(String wildcardPattern)
8. wildcardToRegexp(String globExp)
9. wildcardToRegexString(String wildcard)