/*

 * Copyright 2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/*

 *

 *

 * Used by UnicodeTest.sh.

 *

 * This class creates Java source files using Unicode characters

 * that test the limits of what's possible

 * - in situations where the platform encoding imposes limits

 *   (command line arguments, non-Unicode file system)

 * - in situations where full Unicode is supported

 *   (file system access in UTF-8 locales and on Windows 2000++,

 *    jar file contents)

 *

 * @author Norbert Lindenberg

 */

import java.io.FileOutputStream;

import java.io.OutputStreamWriter;

import java.nio.charset.Charset;

import java.util.Locale;

public class UnicodeTest {

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

        String commandLineClassNameSuffix = commandLineClassNameSuffix();

        String commandLineClassName = "ClassA" + commandLineClassNameSuffix;

        String manifestClassName;

        if (hasUnicodeFileSystem()) {

            manifestClassName = "ClassB" + unicode;

        } else {

            manifestClassName = "ClassB" + commandLineClassNameSuffix;

        }

        generateSource(commandLineClassName, manifestClassName);

        generateSource(manifestClassName, commandLineClassName);

        generateManifest(manifestClassName);

        System.out.println(commandLineClassName);

    }

    private static final String fileSeparator = System.getProperty("file.separator");

    private static final String osName = System.getProperty("os.name");

    private static final String defaultEncoding = Charset.defaultCharset().name();

    // language names taken from java.util.Locale.getDisplayLanguage for the respective language

    private static final String arabic = "\u0627\u0644\u0639\u0631\u0628\u064a\u0629";

    private static final String s_chinese = "\u4e2d\u6587";

    private static final String t_chinese = "\u4e2d\u6587";

    private static final String russian = "\u0440\u0443\u0441\u0441\u043A\u0438\u0439";

    private static final String hindi = "\u0939\u093f\u0902\u0926\u0940";

    private static final String greek = "\u03b5\u03bb\u03bb\u03b7\u03bd\u03b9\u03ba\u03ac";

    private static final String hebrew = "\u05e2\u05d1\u05e8\u05d9\u05ea";

    private static final String japanese = "\u65e5\u672c\u8a9e";

    private static final String korean = "\ud55c\uad6d\uc5b4";

    private static final String lithuanian = "Lietuvi\u0173";

    private static final String czech = "\u010de\u0161tina";

    private static final String turkish = "T\u00fcrk\u00e7e";

    private static final String spanish = "espa\u00f1ol";

    private static final String thai = "\u0e44\u0e17\u0e22";

    private static final String unicode = arabic + s_chinese + t_chinese

            + russian + hindi + greek + hebrew + japanese + korean

            + lithuanian + czech + turkish + spanish + thai;

    private static String commandLineClassNameSuffix() {

        // Mapping from main platform encodings to language names

        // for Unix and Windows, respectively. Use empty suffix

        // for Windows encodings where OEM encoding differs.

        // Use null if encoding isn't used.

        String[][] names = {

            { "UTF-8",          unicode,        ""              },

            { "windows-1256",   null,           ""              },

            { "iso-8859-6",     arabic,         null            },

            { "GBK",            s_chinese,      s_chinese       },

            { "GB18030",        s_chinese,      s_chinese       },

            { "GB2312",         s_chinese,      null            },

            { "x-windows-950",  null,           t_chinese       },

            { "x-MS950-HKSCS",  null,           t_chinese       },

            { "x-euc-tw",       t_chinese,      null            },

            { "Big5",           t_chinese,      null            },

            { "Big5-HKSCS",     t_chinese,      null            },

            { "windows-1251",   null,           ""              },

            { "iso-8859-5",     russian,        null            },

            { "koi8-r",         russian,        null            },

            { "windows-1253",   null,           ""              },

            { "iso-8859-7",     greek,          null            },

            { "windows-1255",   null,           ""              },

            { "iso8859-8",      hebrew,         null            },

            { "windows-31j",    null,           japanese        },

            { "x-eucJP-Open",   japanese,       null            },

            { "x-EUC-JP-LINUX", japanese,       null            },

            { "x-pck",          japanese,       null            },

            { "x-windows-949",  null,           korean          },

            { "euc-kr",         korean,         null            },

            { "windows-1257",   null,           ""              },

            { "iso-8859-13",    lithuanian,     null            },

            { "windows-1250",   null,           ""              },

            { "iso-8859-2",     czech,          null            },

            { "windows-1254",   null,           ""              },

            { "iso-8859-9",     turkish,        null            },

            { "windows-1252",   null,           ""              },

            { "iso-8859-1",     spanish,        null            },

            { "iso-8859-15",    spanish,        null            },

            { "x-windows-874",  null,           thai            },

            { "tis-620",        thai,           null            },

        };

        int column;

        if (osName.startsWith("Windows")) {

            column = 2;

        } else {

            column = 1;

        }

        for (int i = 0; i < names.length; i++) {

             if (names[i][0].equalsIgnoreCase(defaultEncoding)) {

                 return names[i][column];

             }

         }

         return "";

    }

    private static boolean hasUnicodeFileSystem() {

        if (osName.startsWith("Windows")) {

            return ! osName.startsWith("Windows 9") &&

                   ! osName.equals("Windows Me");

        } else {

            return defaultEncoding.equalsIgnoreCase("UTF-8");

        }

    }

    private static void generateSource(String thisClass, String otherClass) throws Exception {

        String fileName = "UnicodeTest-src" + fileSeparator + thisClass + ".java";

        OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream(fileName), "UTF-8");

        out.write("public class " + thisClass + " {\n");

        out.write("    public static void main(String[] args) {\n");

        out.write("        if (!" + otherClass + "." + otherClass.toLowerCase() + "().equals(\"" + otherClass + "\")) {\n");

        out.write("            throw new RuntimeException();\n");

        out.write("        }\n");

        out.write("    }\n");

        out.write("    public static String " + thisClass.toLowerCase() + "() {\n");

        out.write("        return \"" + thisClass + "\";\n");

        out.write("    }\n");

        out.write("}\n");

        out.close();

    }

    private static void generateManifest(String mainClass) throws Exception {

        String fileName = "UnicodeTest-src" + fileSeparator + "MANIFEST.MF";

        FileOutputStream out = new FileOutputStream(fileName);

        out.write("Manifest-Version: 1.0\n".getBytes("UTF-8"));

        // Header lines are limited to 72 bytes.

        // The manifest spec doesn't say we have to break at character boundaries,

        // so we rudely break at byte boundaries.

        byte[] headerBytes = ("Main-Class: " + mainClass + "\n").getBytes("UTF-8");

        if (headerBytes.length <= 72) {

            out.write(headerBytes);

        } else {

            out.write(headerBytes, 0, 72);

            int start = 72;

            while (headerBytes.length > start) {

                out.write((byte) '\n');

                out.write((byte) ' ');

                int count = Math.min(71, headerBytes.length - start);

                out.write(headerBytes, start, count);

                start += count;

            }

        }

        out.close();

    }

}