Mercurial > jhg
diff src/org/tmatesoft/hg/internal/PathGlobMatcher.java @ 114:46291ec605a0
Filters to read and initialize according to configuration files
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 03 Feb 2011 22:13:55 +0100 |
parents | |
children | 68ba22a2133a |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/org/tmatesoft/hg/internal/PathGlobMatcher.java Thu Feb 03 22:13:55 2011 +0100 @@ -0,0 +1,90 @@ +/* + * Copyright (c) 2011 TMate Software Ltd + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * For information on how to redistribute this software under + * the terms of a license other than GNU General Public License + * contact TMate Software at support@svnkit.com + */ +package org.tmatesoft.hg.internal; + +import java.util.regex.PatternSyntaxException; + +import org.tmatesoft.hg.core.Path; + +/** + * + * @author Artem Tikhomirov + * @author TMate Software Ltd. + */ +public class PathGlobMatcher implements Path.Matcher { + + private final PathRegexpMatcher delegate; + + /** + * + * @param globPatterns + * @throws NullPointerException if argument is null + * @throws IllegalArgumentException if any of the patterns is not valid + */ + public PathGlobMatcher(String... globPatterns) { + String[] regexp = new String[globPatterns.length]; //deliberately let fail with NPE + int i = 0; + for (String s : globPatterns) { + regexp[i] = glob2regexp(s); + } + try { + delegate = new PathRegexpMatcher(regexp); + } catch (PatternSyntaxException ex) { + ex.printStackTrace(); + throw new IllegalArgumentException(ex); + } + } + + + // HgIgnore.glob2regex is similar, but IsIgnore solves slightly different task + // (need to match partial paths, e.g. for glob 'bin' shall match not only 'bin' folder, but also any path below it, + // which is not generally the case + private static String glob2regexp(String glob) { + int end = glob.length() - 1; + boolean needLineEndMatch = glob.charAt(end) != '*'; + while (end > 0 && glob.charAt(end) == '*') end--; // remove trailing * that are useless for Pattern.find() + StringBuilder sb = new StringBuilder(end*2); + for (int i = 0; i <= end; i++) { + char ch = glob.charAt(i); + if (ch == '*') { + if (glob.charAt(i+1) == '*') { // i < end because we've stripped any trailing * earlier + // any char, including path segment separator + sb.append(".*?"); + } else { + // just path segments + sb.append("[^/]*?"); + } + continue; + } else if (ch == '?') { + sb.append("[^/]"); + continue; + } else if (ch == '.' || ch == '\\') { + sb.append('\\'); + } + sb.append(ch); + } + if (needLineEndMatch) { + sb.append('$'); + } + return sb.toString(); + } + + public boolean accept(Path path) { + return delegate.accept(path); + } + +}