/*
* Copyright 2002-2007 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.util;
/**
* Utility methods for simple pattern matching, in particular for
* Spring's typical "xxx*", "*xxx" and "*xxx*" pattern styles.
*
* @author Juergen Hoeller
* @since 2.0
*/
public abstract class PatternMatchUtils {
/**
* Match a String against the given pattern, supporting the following simple
* pattern styles: "xxx*", "*xxx", "*xxx*" and "xxx*yyy" matches (with an
* arbitrary number of pattern parts), as well as direct equality.
* @param pattern the pattern to match against
* @param str the String to match
* @return whether the String matches the given pattern
*/
public static boolean simpleMatch(String pattern, String str) {
if (pattern == null || str == null) {
return false;
}
int firstIndex = pattern.indexOf('*');
if (firstIndex == -1) {
return pattern.equals(str);
}
if (firstIndex == 0) {
if (pattern.length() == 1) {
return true;
}
int nextIndex = pattern.indexOf('*', firstIndex + 1);
if (nextIndex == -1) {
return str.endsWith(pattern.substring(1));
}
String part = pattern.substring(1, nextIndex);
int partIndex = str.indexOf(part);
while (partIndex != -1) {
if (simpleMatch(pattern.substring(nextIndex), str.substring(partIndex + part.length()))) {
return true;
}
partIndex = str.indexOf(part, partIndex + 1);
}
return false;
}
return (str.length() >= firstIndex &&
pattern.substring(0, firstIndex).equals(str.substring(0, firstIndex)) &&
simpleMatch(pattern.substring(firstIndex), str.substring(firstIndex)));
}
/**
* Match a String against the given patterns, supporting the following simple
* pattern styles: "xxx*", "*xxx", "*xxx*" and "xxx*yyy" matches (with an
* arbitrary number of pattern parts), as well as direct equality.
* @param patterns the patterns to match against
* @param str the String to match
* @return whether the String matches any of the given patterns
*/
public static boolean simpleMatch(String[] patterns, String str) {
if (patterns != null) {
for (int i = 0; i < patterns.length; i++) {
if (simpleMatch(patterns[i], str)) {
return true;
}
}
}
return false;
}
}