1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package jdk.tools.jaotc.collect; 25 26 import java.io.IOException; 27 import java.nio.file.*; 28 import java.nio.file.attribute.BasicFileAttributes; 29 import java.util.ArrayList; 30 import java.util.Iterator; 31 32 import static java.nio.file.FileVisitResult.CONTINUE; 33 34 /** 35 * {@link FileVisitor} implementation to find class files recursively. 36 */ 37 public final class FileSystemFinder extends SimpleFileVisitor<Path> implements Iterable<Path> { 38 private final ArrayList<Path> fileNames = new ArrayList<>(); 39 private final PathMatcher filter; 40 41 public FileSystemFinder(Path combinedPath, PathMatcher filter) { 42 this.filter = filter; 43 try { 44 Files.walkFileTree(combinedPath, this); 45 } catch (IOException e) { 46 throw new InternalError(e); 47 } 48 } 49 50 /** 51 * Compares the glob pattern against the file name. 52 */ 53 private void find(Path file) { 54 Path name = file.getFileName(); 55 if (name != null && filter.matches(name)) { 56 fileNames.add(file); 57 } 58 } 59 60 @Override 61 public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) { 62 find(file); 63 return CONTINUE; 64 } 65 66 @Override 67 public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) { 68 find(dir); 69 return CONTINUE; 70 } 71 72 @Override 73 public Iterator<Path> iterator() { 74 return fileNames.iterator(); 75 } 76 }