PatternMatchUtils 를 활용한 필터링

PatternMatchUtils

PatternMatchUtils 는 추상 클래스로 선언된 유틸 클래스이다.

/**
 * 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(@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.startsWith(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(@Nullable String[] patterns, String str) {
        if (patterns != null) {
            for (String pattern : patterns) {
                if (simpleMatch(pattern, str)) {
                    return true;
                }
            }
        }
        return false;
    }

}

사용

사용법은 간단하다.

private static final String[] PATTERNS = {"request*", "order*", "save*"};
String methodName = method.getName();
if (!PatternMatchUtils.simpleMatch(patterns, methodName)) {
    // 구현
}