/*

 * Copyright (c) 2002, 2015, 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 8003512

 * @summary javac doesn't work with jar files with >64k entries

 * @modules jdk.compiler

 *          jdk.jartool/sun.tools.jar

 * @compile -target 6 -source 6 -XDignore.symbol.file LoadClassFromJava6CreatedJarTest.java ../Utils.java

 * @run main/timeout=360 LoadClassFromJava6CreatedJarTest

 */

/*

 * The test creates a jar file with more than 64K entries. The jar file is

 * created executing the LoadClassFromJava6CreatedJarTest$MakeJar

 * class with a JVM version 6. The test must include Java 6 features only.

 *

 * The aim is to verify classes included in jar files with more than 64K entries

 * created with Java 6 can be loaded by more recent versions of Java.

 *

 * A path to JDK or JRE version 6 is needed. This can be provided

 * by passing this option to jtreg:

 * -javaoption:-Djava6.home="/path/to/jdk_or_jre6"

 */

import java.io.BufferedInputStream;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.Arrays;

import java.util.List;

import java.util.zip.CRC32;

import java.util.zip.ZipEntry;

import java.util.zip.ZipOutputStream;

public class LoadClassFromJava6CreatedJarTest {

    static final String javaHome6 = System.getProperty("java6.home");

    static final String testClasses = System.getProperty("test.classes");

    public static void main(String... args)

            throws IOException, InterruptedException {

        if (javaHome6 != null) {

            new LoadClassFromJava6CreatedJarTest().run();

        } else {

            System.out.println(

                "The test LoadClassFromJava6CreatedJarTest cannot be executed. " +

                "In order to run it you should pass an option with " +

                "this form -javaoption:-Djava6.home=\"/path/to/jdk_or_jre6\" " +

                "to jtreg.");

        }

    }

    void run() throws IOException, InterruptedException {

        File classA = new File("A.java");

        Utils.createJavaFile(classA, null);

        if (!Utils.compile("-target", "6", "-source", "6",

            classA.getAbsolutePath())) {

            throw new AssertionError("Test failed while compiling class A");

        }

        executeCommand(Arrays.asList(javaHome6 + "/bin/java", "-classpath",

            testClasses, "LoadClassFromJava6CreatedJarTest$MakeJar"));

        File classB = new File("B.java");

        Utils.createJavaFile(classB, classA);

        if (!Utils.compile("-cp", "a.jar", classB.getAbsolutePath())) {

            throw new AssertionError("Test failed while compiling class Main");

        }

    }

    void executeCommand(List<String> command)

            throws IOException, InterruptedException {

        ProcessBuilder pb = new ProcessBuilder(command).

            redirectErrorStream(true);

        Process p = pb.start();

        BufferedReader r =

            new BufferedReader(new InputStreamReader(p.getInputStream()));

        String line;

        while ((line = r.readLine()) != null) {

            System.err.println(line);

        }

        int rc = p.waitFor();

        if (rc != 0) {

            throw new AssertionError("Unexpected exit code: " + rc);

        }

    }

    static class MakeJar {

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

            File classFile = new File("A.class");

            ZipOutputStream zos = null;

            FileInputStream fis = null;

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

            ZipEntry ze = null;

            try {

                zos = new ZipOutputStream(new FileOutputStream("a.jar"));

                zos.setLevel(ZipOutputStream.STORED);

                zos.setMethod(ZipOutputStream.STORED);

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

                    ze = new ZipEntry("X" + i + ".txt");

                    ze.setSize(0);

                    ze.setCompressedSize(0);

                    ze.setCrc(0);

                    zos.putNextEntry(ze);

                }

                // add a class file

                ze = new ZipEntry("A.class");

                ze.setCompressedSize(classFile.length());

                ze.setSize(classFile.length());

                ze.setCrc(computeCRC(classFile));

                zos.putNextEntry(ze);

                fis = new FileInputStream(classFile);

                for (int c; (c = fis.read()) >= 0;) {

                    zos.write(c);

                }

            } finally {

                zos.close();

                fis.close();

            }

        }

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

        static long getCount(long minlength) {

            return (minlength / BUFFER_LEN) + 1;

        }

        static 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();

        }

        static long computeCRC(File inFile) throws IOException {

            byte[] buffer = new byte[8192];

            CRC32 crc = new CRC32();

            FileInputStream fis = null;

            BufferedInputStream bis = null;

            try {

                fis = new FileInputStream(inFile);

                bis = new BufferedInputStream(fis);

                int n = bis.read(buffer);

                while (n > 0) {

                    crc.update(buffer, 0, n);

                    n = bis.read(buffer);

                }

            } finally {

                bis.close();

                fis.close();

            }

            return crc.getValue();

        }

    }

}