/*

 * Copyright (c) 2012, 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

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

 * questions.

 */

/*

 * @test

 * @bug 7194005

 * @summary launcher handling of zip64 archives (Scenario A and B)

 * @compile  -XDignore.symbol.file BigJar.java

 * @run main/timeout=600 BigJar

 */

/*

 * This test consists of two scenarios:

 *

 * Scenario A: create a jar with entries exceeding 64K, add a main class and

 * see if the launcher can handle it.

 *

 * Scenario A1: create a jar as in A, but add a zipfile comment as well.

 *

 * Scenario B: create a jar with a large enough file exceeding 4GB, and

 * similarly test the launcher. This test can be run optionally by using the

 * following jtreg option:

 *  "-javaoptions:-DBigJar_testScenarioB=true"

 * or set

 *  "BigJar_testScenarioB" environment variable.

 *

 * Note this test will only run iff all the disk requirements are met at runtime.

 */

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.ArrayList;

import java.util.List;

import java.util.jar.Attributes;

import java.util.jar.JarEntry;

import java.util.jar.JarOutputStream;

import java.util.jar.Manifest;

import java.util.zip.CRC32;

import java.util.zip.ZipEntry;

import java.util.zip.ZipOutputStream;

public class BigJar extends TestHelper {

    private static final long GIGA = 1024 * 1024 * 1024;

    private static final int BUFFER_LEN = Short.MAX_VALUE * 2;

    long getCount(long minlength) {

        return (minlength / BUFFER_LEN) + 1;

    }

    long computeCRC(long minlength) {

        CRC32 crc = new CRC32();

        byte[] buffer = new byte[BUFFER_LEN];

        long count = getCount(minlength);

        for (long i = 0; i < count; i++) {

            crc.update(buffer);

        }

        return crc.getValue();

    }

    long computeCRC(File inFile) throws IOException {

        byte[] buffer = new byte[8192];

        CRC32 crc = new CRC32();

        try (FileInputStream fis = new FileInputStream(inFile);

                BufferedInputStream bis = new BufferedInputStream(fis)) {

            int n = bis.read(buffer);

            while (n > 0) {

                crc.update(buffer, 0, n);

                n = bis.read(buffer);

            }

        }

        return crc.getValue();

    }

    void createLargeFile(OutputStream os, long minlength) throws IOException {

        byte[] buffer = new byte[BUFFER_LEN];

        long count = getCount(minlength);

        for (long i = 0; i < count; i++) {

            os.write(buffer);

        }

        os.flush();

    }

    Manifest createMainClass(File javaFile) throws IOException {

        javaFile.delete();

        List<String> content = new ArrayList<>();

        content.add("public class " + baseName(javaFile) + "{");

        content.add("public static void main(String... args) {");

        content.add("System.out.println(\"Hello World\\n\");");

        content.add("System.exit(0);");

        content.add("}");

        content.add("}");

        createFile(javaFile, content);

        compile(javaFile.getName());

        Manifest manifest = new Manifest();

        manifest.clear();

        manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");

        manifest.getMainAttributes().put(Attributes.Name.MAIN_CLASS, baseName(javaFile));

        System.out.println(manifest.getMainAttributes().keySet());

        System.out.println(manifest.getMainAttributes().values());

        return manifest;

    }

    void createJarWithLargeFile(File jarFile, long minlength) throws IOException {

        File javaFile = new File("Foo.java");

        Manifest manifest = createMainClass(javaFile);

        File classFile = getClassFile(javaFile);

        try (JarOutputStream jos = new JarOutputStream(new FileOutputStream(jarFile), manifest);

                BufferedOutputStream bos = new BufferedOutputStream(jos);

                FileInputStream fis = new FileInputStream(classFile);) {

            jos.setLevel(ZipOutputStream.STORED);

            jos.setMethod(0);

            JarEntry je = new JarEntry("large.data");

            je.setCompressedSize(getCount(minlength) * BUFFER_LEN);

            je.setSize(getCount(minlength) * BUFFER_LEN);

            je.setCrc(computeCRC(minlength));

            je.setMethod(ZipEntry.STORED);

            jos.putNextEntry(je);

            createLargeFile(bos, minlength);

            je = new JarEntry(classFile.getName());

            je.setCompressedSize(classFile.length());

            je.setSize(classFile.length());

            je.setCrc(computeCRC(classFile));

            je.setMethod(ZipEntry.STORED);

            jos.putNextEntry(je);

            copyStream(fis, bos);

            bos.flush();

            jos.closeEntry();

        }

    }

    void createLargeJar(File jarFile, String comment) throws IOException {

        final int MAX = Short.MAX_VALUE * 2 + 10;

        JarEntry je = null;

        File javaFile = new File("Foo.java");

        File classFile = getClassFile(javaFile);

        Manifest manifest = createMainClass(javaFile);

        try (JarOutputStream jos = new JarOutputStream(new FileOutputStream(jarFile), manifest);

                FileInputStream fis = new FileInputStream(classFile)) {

            jos.setLevel(JarOutputStream.STORED);

            jos.setMethod(JarOutputStream.STORED);

            for (int i = 0; i < MAX; i++) {

                je = new JarEntry("X" + i + ".txt");

                je.setSize(0);

                je.setCompressedSize(0);

                je.setCrc(0);

                jos.putNextEntry(je);

            }

            // add a class file

            je = new JarEntry(classFile.getName());

            je.setCompressedSize(classFile.length());

            je.setSize(classFile.length());

            je.setCrc(computeCRC(classFile));

            jos.putNextEntry(je);

            copyStream(fis, jos);

            jos.closeEntry();

            if (comment != null) {

                jos.setComment(comment);

            }

        }

    }

    void testTheJar(File theJar) throws Exception {

        try {

            TestResult tr = doExec(javaCmd, "-jar", theJar.getName());

            tr.checkPositive();

            if (!tr.testStatus) {

                System.out.println(tr);

                throw new Exception("Failed");

            }

        } finally {

            theJar.delete();

        }

    }

    // a jar with entries exceeding 64k + a class file for the existential test

    @Test

    void testScenarioA() throws Exception {

        File largeJar = new File("large.jar");

        createLargeJar(largeJar, null);

        testTheJar(largeJar);

    }

     // a jar with entries exceeding 64k and zip comment

    @Test

    void testScenarioA1() throws Exception {

        File largeJar = new File("largewithcomment.jar");

        createLargeJar(largeJar, "A really large jar with a comment");

        testTheJar(largeJar);

    }

    // a jar with an enormous file + a class file for the existential test

    @Test

    void testScenarioB() throws Exception {

        final String testString = "BigJar_testScenarioB";

        if (Boolean.getBoolean(testString) == false &&

                System.getenv(testString) == null) {

            System.out.println("Warning: testScenarioB passes vacuously");

            return;

        }

        final File largeJar = new File("huge.jar");

        final Path path = largeJar.getAbsoluteFile().getParentFile().toPath();

        final long available = Files.getFileStore(path).getUsableSpace();

        final long MAX_VALUE = 0xFFFF_FFFFL;

        final long absolute = MAX_VALUE + 1L;

        final long required = (long) (absolute * 1.1); // pad for sundries

        System.out.println("\tavailable: " + available / GIGA + " GB");

        System.out.println("\trequired: " + required / GIGA + " GB");

        if (available > required) {

            createJarWithLargeFile(largeJar, absolute);

            testTheJar(largeJar);

        } else {

            System.out.println("Warning: testScenarioB passes vacuously,"

                    + " requirements exceeds available space");

        }

    }

    public static void main(String... args) throws Exception {

        BigJar bj = new BigJar();

        bj.run(args);

        if (testExitValue > 0) {

            System.out.println("Total of " + testExitValue + " failed");

            System.exit(1);

        } else {

            System.out.println("All tests pass");

        }

    }

}