/*

 * 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.

 *

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 */

/* @test

 * @bug 4313887 6838333

 * @summary Unit test for java.nio.file.attribute.BasicFileAttributeView

 * @library ../..

 */

import java.nio.file.*;

import java.nio.file.attribute.*;

import java.util.*;

import java.util.concurrent.TimeUnit;

import java.io.*;

public class Basic {

    static void check(boolean okay, String msg) {

        if (!okay)

            throw new RuntimeException(msg);

    }

    static void checkAttributesOfDirectory(Path dir)

        throws IOException

    {

        BasicFileAttributes attrs = Files.readAttributes(dir, BasicFileAttributes.class);

        check(attrs.isDirectory(), "is a directory");

        check(!attrs.isRegularFile(), "is not a regular file");

        check(!attrs.isSymbolicLink(), "is not a link");

        check(!attrs.isOther(), "is not other");

        // last-modified-time should match java.io.File

        File f = new File(dir.toString());

        check(f.lastModified() == attrs.lastModifiedTime().toMillis(),

              "last-modified time should be the same");

    }

    static void checkAttributesOfFile(Path dir, Path file)

        throws IOException

    {

        BasicFileAttributes attrs = Files.readAttributes(file, BasicFileAttributes.class);

        check(attrs.isRegularFile(), "is a regular file");

        check(!attrs.isDirectory(), "is not a directory");

        check(!attrs.isSymbolicLink(), "is not a link");

        check(!attrs.isOther(), "is not other");

        // size and last-modified-time should match java.io.File

        File f = new File(file.toString());

        check(f.length() == attrs.size(), "size should be the same");

        check(f.lastModified() == attrs.lastModifiedTime().toMillis(),

              "last-modified time should be the same");

        // copy last-modified time and file create time from directory to file,

        // re-read attribtues, and check they match

        BasicFileAttributeView view =

            Files.getFileAttributeView(file, BasicFileAttributeView.class);

        BasicFileAttributes dirAttrs = Files.readAttributes(dir, BasicFileAttributes.class);

        view.setTimes(dirAttrs.lastModifiedTime(), null, null);

        if (dirAttrs.creationTime() != null) {

            view.setTimes(null, null, dirAttrs.creationTime());

        }

        attrs = view.readAttributes();

        check(attrs.lastModifiedTime().equals(dirAttrs.lastModifiedTime()),

            "last-modified time should be equal");

        if (dirAttrs.creationTime() != null) {

            check(attrs.creationTime().equals(dirAttrs.creationTime()),

                "create time should be the same");

        }

        // security tests

        check (!(attrs instanceof PosixFileAttributes),

            "should not be able to cast to PosixFileAttributes");

    }

    static void checkAttributesOfLink(Path link)

        throws IOException

    {

        BasicFileAttributes attrs =

            Files.readAttributes(link, BasicFileAttributes.class, LinkOption.NOFOLLOW_LINKS);

        check(attrs.isSymbolicLink(), "is a link");

        check(!attrs.isDirectory(), "is a directory");

        check(!attrs.isRegularFile(), "is not a regular file");

        check(!attrs.isOther(), "is not other");

    }

    static void attributeReadWriteTests(Path dir)

        throws IOException

    {

        // create file

        Path file = dir.resolve("foo");

        try (OutputStream out = Files.newOutputStream(file)) {

            out.write("this is not an empty file".getBytes("UTF-8"));

        }

        // check attributes of directory and file

        checkAttributesOfDirectory(dir);

        checkAttributesOfFile(dir, file);

        // symbolic links may be supported

        Path link = dir.resolve("link");

        try {

            Files.createSymbolicLink(link, file);

        } catch (UnsupportedOperationException x) {

            return;

        } catch (IOException x) {

            return;

        }

        checkAttributesOfLink(link);

    }

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

        // create temporary directory to run tests

        Path dir = TestUtil.createTemporaryDirectory();

        try {

            attributeReadWriteTests(dir);

        } finally {

            TestUtil.removeAll(dir);

        }

    }

}