| // Copyright (C) 2020 The Android Open Source Project |
| // |
| // 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 com.google.gerrit.plugins.codeowners.backend; |
| |
| import com.google.common.flogger.FluentLogger; |
| import java.nio.file.FileSystems; |
| import java.nio.file.Path; |
| import java.util.regex.PatternSyntaxException; |
| |
| /** |
| * Matcher that checks for a given path expression as Java NIO glob if it matches a given path. |
| * |
| * <p>This matcher supports standard NIO globs: |
| * |
| * <ul> |
| * <li>'*': matches any string that does not include slashes |
| * <li>'**': matches any string, including slashes |
| * <li>'?': matches any character |
| * <li>'[abc]': matches one character given in the bracket |
| * <li>'[a-c]': matches one character from the range given in the bracket |
| * <li>'{html,htm}': matches either of the 2 expressions, 'html' or 'htm' |
| * <li>'{**/,}': matches either of the 2 expressions, any string including slashes ('**') |
| * followed by a '/' or empty string. This can be used to match a file name in a folder and |
| * all its subfolders, e.g. '{**/,}BUILD' matches files that either match '**/BUILD' |
| * or 'BUILD'. |
| * </ul> |
| */ |
| public class GlobMatcher implements PathExpressionMatcher { |
| private static final FluentLogger logger = FluentLogger.forEnclosingClass(); |
| |
| /** Singleton instance. */ |
| public static GlobMatcher INSTANCE = new GlobMatcher(); |
| |
| /** Private constructor to prevent creation of further instances. */ |
| private GlobMatcher() {} |
| |
| @Override |
| public boolean matches(String glob, Path relativePath) { |
| try { |
| boolean isMatching = |
| FileSystems.getDefault().getPathMatcher("glob:" + glob).matches(relativePath); |
| logger.atFine().log( |
| "path %s %s matching %s", relativePath, isMatching ? "is" : "is not", glob); |
| return isMatching; |
| } catch (PatternSyntaxException e) { |
| logger.atFine().log("glob %s is invalid: %s", glob, e.getMessage()); |
| return false; |
| } |
| } |
| } |