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 * 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
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 *      https://www.apache.org/licenses/LICENSE-2.0
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package org.springframework.util;

import org.springframework.lang.Nullable;

Utility methods for simple pattern matching, in particular for Spring's typical "xxx*", "*xxx" and "*xxx*" pattern styles.
Author:Juergen Hoeller
Since:2.0
/** * 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.
Params:
  • pattern – the pattern to match against
  • str – the String to match
Returns:whether the String matches the given pattern
/** * 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(@Nullable String pattern, @Nullable 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('*', 1); if (nextIndex == -1) { return str.endsWith(pattern.substring(1)); } String part = pattern.substring(1, nextIndex); if (part.isEmpty()) { return simpleMatch(pattern.substring(nextIndex), str); } 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.
Params:
  • patterns – the patterns to match against
  • str – the String to match
Returns:whether the String matches any of the given patterns
/** * 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(@Nullable String[] patterns, String str) { if (patterns != null) { for (String pattern : patterns) { if (simpleMatch(pattern, str)) { return true; } } } return false; } }