/*

 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.

 * 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

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 */

import java.nio.file.AccessMode;

import java.nio.file.ClosedFileSystemException;

import java.nio.file.DirectoryStream;

import java.nio.file.FileStore;

import java.nio.file.FileSystem;

import java.nio.file.FileSystems;

import java.nio.file.FileVisitResult;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.nio.file.SimpleFileVisitor;

import java.nio.file.StandardCopyOption;

import java.nio.file.attribute.BasicFileAttributes;

import java.nio.file.spi.FileSystemProvider;

import java.net.URI;

import java.io.IOException;

import java.util.Collections;

import java.util.Map;

/**

 * @test

 * @summary Basic test for zip provider

 *

 * @run main Basic

 * @run main/othervm/java.security.policy=test.policy Basic

 */

public class Basic {

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

        // Test: zip should should be returned in provider list

        boolean found = false;

        for (FileSystemProvider provider: FileSystemProvider.installedProviders()) {

            if (provider.getScheme().equalsIgnoreCase("jar")) {

                found = true;

                break;

            }

        }

        if (!found)

            throw new RuntimeException("'jar' provider not installed");

        // create JAR file for test

        Path jarFile = Utils.createJarFile("basic.jar",

                "META-INF/services/java.nio.file.spi.FileSystemProvider");

        // Test: FileSystems#newFileSystem(Path)

        Map<String,?> env = Collections.emptyMap();

        FileSystems.newFileSystem(jarFile, null).close();

        // Test: FileSystems#newFileSystem(URI)

        URI uri = new URI("jar", jarFile.toUri().toString(), null);

        FileSystem fs = FileSystems.newFileSystem(uri, env, null);

        // Test: exercise toUri method

        String expected = uri.toString() + "!/foo";

        String actual = fs.getPath("/foo").toUri().toString();

        if (!actual.equals(expected)) {

            throw new RuntimeException("toUri returned '" + actual +

                "', expected '" + expected + "'");

        }

        // Test: exercise directory iterator and retrieval of basic attributes

        Files.walkFileTree(fs.getPath("/"), new FileTreePrinter());

        // Test: DirectoryStream

        found = false;

        try (DirectoryStream<Path> stream = Files.newDirectoryStream(fs.getPath("/"))) {

            for (Path entry: stream) {

                found = entry.toString().equals("/META-INF/");

                if (found) break;

            }

        }

        if (!found)

            throw new RuntimeException("Expected file not found");

        // Test: copy file from zip file to current (scratch) directory

        Path source = fs.getPath("/META-INF/services/java.nio.file.spi.FileSystemProvider");

        if (Files.exists(source)) {

            Path target = Paths.get(source.getFileName().toString());

            Files.copy(source, target, StandardCopyOption.REPLACE_EXISTING);

            try {

                long s1 = Files.readAttributes(source, BasicFileAttributes.class).size();

                long s2 = Files.readAttributes(target, BasicFileAttributes.class).size();

                if (s2 != s1)

                    throw new RuntimeException("target size != source size");

            } finally {

                Files.delete(target);

            }

        }

        // Test: FileStore

        FileStore store = Files.getFileStore(fs.getPath("/"));

        if (!store.supportsFileAttributeView("basic"))

            throw new RuntimeException("BasicFileAttributeView should be supported");

        // Test: ClosedFileSystemException

        fs.close();

        if (fs.isOpen())

            throw new RuntimeException("FileSystem should be closed");

        try {

            fs.provider().checkAccess(fs.getPath("/missing"), AccessMode.READ);

        } catch (ClosedFileSystemException x) { }

    }

    // FileVisitor that pretty prints a file tree

    static class FileTreePrinter extends SimpleFileVisitor<Path> {

        private int indent = 0;

        private void indent() {

            StringBuilder sb = new StringBuilder(indent);

            for (int i=0; i<indent; i++) sb.append(" ");

            System.out.print(sb);

        }

        @Override

        public FileVisitResult preVisitDirectory(Path dir,

                                                 BasicFileAttributes attrs)

        {

            if (dir.getFileName() != null) {

                indent();

                System.out.println(dir.getFileName() + "/");

                indent++;

            }

            return FileVisitResult.CONTINUE;

        }

        @Override

        public FileVisitResult visitFile(Path file,

                                         BasicFileAttributes attrs)

        {

            indent();

            System.out.print(file.getFileName());

            if (attrs.isRegularFile())

            System.out.println();

            return FileVisitResult.CONTINUE;

        }

        @Override

        public FileVisitResult postVisitDirectory(Path dir, IOException exc)

            throws IOException

        {

            if (exc != null)

                super.postVisitDirectory(dir, exc);

            if (dir.getFileName() != null)

                indent--;

            return FileVisitResult.CONTINUE;

        }

    }

}