86 lines
3.1 KiB
Java
86 lines
3.1 KiB
Java
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/*
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* Copyright 2008-2009 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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import java.nio.file.*;
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import java.nio.file.attribute.*;
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import java.io.IOException;
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import java.util.*;
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/**
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* Unit test for Files.walkFileTree to test SKIP_SIBLINGS return value.
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*/
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public class SkipSiblings {
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static final Random rand = new Random();
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static final Set<Path> skipped = new HashSet<Path>();
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// check if this path's directory has been skipped
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static void check(Path path) {
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if (skipped.contains(path.getParent()))
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throw new RuntimeException(path + " should not have been visited");
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}
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// indicates if the siblings of this path should be skipped
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static boolean skip(Path path) {
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Path parent = path.getParent();
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if (parent != null && rand.nextBoolean()) {
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skipped.add(parent);
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return true;
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}
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return false;
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}
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public static void main(String[] args) throws Exception {
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Path dir = Paths.get(args[0]);
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Files.walkFileTree(dir, new FileVisitor<Path>() {
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public FileVisitResult preVisitDirectory(Path dir) {
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check(dir);
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if (skip(dir))
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return FileVisitResult.SKIP_SIBLINGS;
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return FileVisitResult.CONTINUE;
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}
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public FileVisitResult preVisitDirectoryFailed(Path dir, IOException exc) {
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throw new RuntimeException(exc);
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}
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public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
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check(file);
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if (skip(file))
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return FileVisitResult.SKIP_SIBLINGS;
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return FileVisitResult.CONTINUE;
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}
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public FileVisitResult postVisitDirectory(Path dir, IOException x) {
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if (x != null)
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throw new RuntimeException(x);
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check(dir);
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return FileVisitResult.CONTINUE;
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}
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public FileVisitResult visitFileFailed(Path file, IOException x) {
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throw new RuntimeException(x);
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}
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});
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}
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}
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