/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/* @test

 * @bug 6876541

 * @summary Test Files.walkFileTree in the presence of a security manager

 * @build WalkWithSecurity

 * @run main/othervm WalkWithSecurity grantAll.policy pass

 * @run main/othervm WalkWithSecurity denyAll.policy fail

 * @run main/othervm WalkWithSecurity grantTopOnly.policy top_only

 */

import java.nio.file.*;

import java.nio.file.attribute.BasicFileAttributes;

import java.io.IOException;

public class WalkWithSecurity {

    public static void main(String[] args) throws IOException {

        String policyFile = args[0];

        ExpectedResult expectedResult = ExpectedResult.valueOf(args[1].toUpperCase());

        String here = System.getProperty("user.dir");

        String testSrc = System.getProperty("test.src");

        if (testSrc == null)

            throw new RuntimeException("This test must be run by jtreg");

        Path dir = Paths.get(testSrc);

        // Sanity check the environment

        if (Paths.get(here).isSameFile(dir))

            throw new RuntimeException("Working directory cannot be " + dir);

        DirectoryStream<Path> stream = dir.newDirectoryStream();

        try {

            if (!stream.iterator().hasNext())

                throw new RuntimeException(testSrc + " is empty");

        } finally {

            stream.close();

        }

        // Install security manager with the given policy file

        System.setProperty("java.security.policy",

            dir.resolve(policyFile).toString());

        System.setSecurityManager(new SecurityManager());

        // Walk the source tree

        CountingVisitor visitor = new CountingVisitor();

        SecurityException exception = null;

        try {

            Files.walkFileTree(dir, visitor);

        } catch (SecurityException se) {

            exception = se;

        }

        // Check result

        switch (expectedResult) {

            case PASS:

                if (exception != null) {

                    exception.printStackTrace();

                    throw new RuntimeException("SecurityException not expected");

                }

                if (visitor.count() == 0)

                    throw new RuntimeException("No files visited");

                break;

            case FAIL:

                if (exception == null)

                    throw new RuntimeException("SecurityException expected");

                if (visitor.count() > 0)

                    throw new RuntimeException("Files were visited");

                break;

            case TOP_ONLY:

                if (exception != null) {

                    exception.printStackTrace();

                    throw new RuntimeException("SecurityException not expected");

                }

                if (visitor.count() == 0)

                    throw new RuntimeException("Starting file not visited");

                if (visitor.count() > 1)

                    throw new RuntimeException("More than starting file visited");

                break;

            default:

                throw new RuntimeException("Should not get here");

        }

    }

    static enum ExpectedResult {

        PASS,

        FAIL,

        TOP_ONLY;

    }

    static class CountingVisitor extends SimpleFileVisitor<Path> {

        private int count;

        int count() {

            return count;

        }

        @Override

        public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) {

            System.out.println(dir);

            count++;

            return FileVisitResult.CONTINUE;

        }

        @Override

        public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {

            System.out.println(file);

            count++;

            return FileVisitResult.CONTINUE;

        }

    }

}