| chrismair | 00dc7bd | 2014-05-11 21:21:28 +0000 | [diff] [blame] | 1 | /*
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| 2 | * Copyright 2008 the original author or authors.
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | */
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| 16 | package org.mockftpserver.core.util;
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| 17 |
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| 18 | /**
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| 19 | * Contains static utility methods related to pattern-matching and regular expressions.
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| 20 | *
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| 21 | * @author Chris Mair
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| 22 | * @version $Revision$ - $Date$
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| 23 | */
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| 24 | public class PatternUtil {
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| 25 |
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| 26 | /**
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| 27 | * Return true if the specified String contains one or more wildcard characters ('?' or '*')
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| 28 | *
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| 29 | * @param string - the String to check
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| 30 | * @return true if the String contains wildcards
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| 31 | */
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| 32 | public static boolean containsWildcards(String string) {
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| 33 | return string.indexOf("*") != -1 || string.indexOf("?") != -1;
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| 34 | }
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| 35 |
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| 36 | /**
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| 37 | * Convert the specified String, optionally containing wildcards (? or *), to a regular expression String
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| 38 | *
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| 39 | * @param stringWithWildcards - the String to convert, optionally containing wildcards (? or *)
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| 40 | * @return an equivalent regex String
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| 41 | * @throws AssertionError - if the stringWithWildcards is null
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| 42 | */
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| 43 | public static String convertStringWithWildcardsToRegex(String stringWithWildcards) {
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| 44 | Assert.notNull(stringWithWildcards, "stringWithWildcards");
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| 45 |
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| 46 | StringBuffer result = new StringBuffer();
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| 47 | for (int i = 0; i < stringWithWildcards.length(); i++) {
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| 48 | char ch = stringWithWildcards.charAt(i);
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| 49 | switch (ch) {
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| 50 | case '*':
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| 51 | result.append(".*");
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| 52 | break;
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| 53 | case '?':
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| 54 | result.append('.');
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| 55 | break;
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| 56 | case '$':
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| 57 | case '|':
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| 58 | case '[':
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| 59 | case ']':
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| 60 | case '(':
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| 61 | case ')':
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| 62 | case '.':
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| 63 | case ':':
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| 64 | case '{':
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| 65 | case '}':
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| 66 | case '\\':
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| 67 | case '^':
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| 68 | case '+':
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| 69 | result.append('\\');
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| 70 | result.append(ch);
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| 71 | break;
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| 72 | default:
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| 73 | result.append(ch);
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| 74 | }
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| 75 | }
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| 76 | return result.toString();
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| 77 | }
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| 78 |
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| 79 | /**
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| 80 | * Private constructor to prevent instantiation. All members are static.
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| 81 | */
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| 82 | private PatternUtil() {
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| 83 | }
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| 84 |
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| 85 | }
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