| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Gobernment (CIT)

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program 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 for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

/*

 * AUTHORS (In addition to CIT):

 * 2008 {DiSiD Technologies}  {New extension for installation and update of text translations}

 */

package org.gvsig.i18n.impl;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileOutputStream;

import java.io.FileWriter;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.PrintStream;

import java.security.AccessController;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Iterator;

import java.util.LinkedHashSet;

import java.util.List;

import java.util.Locale;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Set;

import java.util.StringTokenizer;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import java.util.zip.ZipOutputStream;

import org.gvsig.i18n.I18nException;

import org.gvsig.i18n.I18nManager;

import org.gvsig.i18n.Messages;

import sun.security.action.GetPropertyAction;

import com.iver.andami.Launcher;

import com.iver.andami.PluginServices;

import com.iver.andami.config.generate.AndamiConfig;

import com.iver.utiles.StringUtilities;

import com.iver.utiles.XMLEntity;

/**

 * Implementation of the I18nManager interface.

 *

 * @author <a href="mailto:dcervera@disid.com">David Cervera</a>

 * @author <a href="mailto:cordin@disid.com">C?sar Ordi?ana</a>

 */

public class I18nManagerImpl implements I18nManager {

    private static final String LOCALES_FILE_NAME = "locales.csv";

    private static final String CSV_SEPARATOR = ",";

    private static final String I18N_EXTENSION = "org.gvsig.i18n";

    private static final String VARIANT = "variant";

    private static final String COUNTRY = "country";

    private static final String LANGUAGE = "language";

    private static final String REGISTERED_LOCALES_PERSISTENCE = "RegisteredLocales";

    private static final I18nManager DEFAULT = new I18nManagerImpl();

    private Set registeredLocales;

    /**

     * The list of default reference locales. The last one will be used to get

     * all the keys when translating to a new locale.

     */

    private Locale[] referenceLocales = new Locale[] { ENGLISH, SPANISH };

    private Locale[] defaultLocales = new Locale[] {

    // Default supported locales

            SPANISH, // Spanish

            ENGLISH, // English

            new Locale("en","US"), // English US

            new Locale("ca"), // Catalan

            new Locale("gl"), // Galician

            new Locale("eu"), // Basque

            new Locale("de"), // German

            new Locale("cs"), // Czech

            new Locale("fr"), // French

            new Locale("it"), // Italian

            new Locale("pl"), // Polish

            new Locale("pt"), // Portuguese

            new Locale("pt", "BR"), // Portuguese Brazil

            new Locale("ro"), // Romanian

            new Locale("zh"), // Chinese

            new Locale("ru"), // Russian

            new Locale("el"), // Greek

            new Locale("pl"), // Polish

            new Locale("tr"), // Turkish

            new Locale("sr"), // Serbio

            new Locale("sw"), // Swahili

            new Locale("km") // Khmer

        };

    /**

     * Returns the unique instance of the I18nManager.

     *

     * @return the unique instance

     */

    public static I18nManager getInstance() {

        return DEFAULT;

    }

    public static String capitalize(String text) {

        // Convert the first letter to uppercase

        String capitalLetter = new String(new char[] { Character

                .toUpperCase(text.charAt(0)) });

        return capitalLetter.concat(text.substring(1));

    }

    /**

     * Empty constructor.

     */

    I18nManagerImpl() {

    }

    public Locale[] getInstalledLocales() {

        if (registeredLocales == null) {

            XMLEntity child = getRegisteredLocalesPersistence();

            // If the list of registered locales is not already persisted,

            // this should be the first time gvSIG is run with the I18nPlugin

            // so we will take the list of default locales

            if (child == null) {

                Locale[] defaultLocales = getDefaultLocales();

                registeredLocales = new LinkedHashSet(defaultLocales.length);

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

                    registeredLocales.add(defaultLocales[i]);

                }

                storeInstalledLocales();

            } else {

                XMLEntity localesEntity = getRegisteredLocalesPersistence();

                registeredLocales = new LinkedHashSet(localesEntity

                        .getChildrenCount());

                for (int i = 0; i < localesEntity.getChildrenCount(); i++) {

                    XMLEntity localeEntity = localesEntity.getChild(i);

                    String language = localeEntity.getStringProperty(LANGUAGE);

                    String country = localeEntity.getStringProperty(COUNTRY);

                    String variant = localeEntity.getStringProperty(VARIANT);

                    Locale locale = new Locale(language, country, variant);

                    registeredLocales.add(locale);

                }

            }

        }

        return (Locale[]) registeredLocales

                .toArray(new Locale[registeredLocales.size()]);

    }

    public void uninstallLocale(Locale locale) throws I18nException {

        if (getCurrentLocale().equals(locale) || isReferenceLocale(locale)) {

            throw new UninstallLocaleException(locale);

        }

        if (registeredLocales.remove(locale)) {

            // Remove from the configured locale list

            storeInstalledLocales();

            // Remove the resource bundle file

            File bundleFile = new File(getResourcesFolder(),

                    getResourceFileName(locale));

            if (bundleFile.exists()) {

                bundleFile.delete();

            }

        }

    }

    public String getDisplayName(Locale locale) {

        return getDisplayName(locale, locale);

    }

    public String getDisplayName(Locale locale, Locale displayLocale) {

        StringBuffer name = new StringBuffer(getLanguageDisplayName(locale,

                displayLocale));

        if (!isEmpty(locale.getCountry())) {

            name.append(" - ");

            name.append(locale.getDisplayCountry(displayLocale));

        }

        if (!isEmpty(locale.getVariant())) {

            name.append(" - ");

            name.append(locale.getDisplayVariant(displayLocale));

        }

        name.append(" (").append(locale.toString()).append(")");

        return name.toString();

    }

    private boolean isEmpty(String text) {

        return text == null || text.trim().length() == 0;

    }

    public String getLanguageDisplayName(Locale locale) {

        return getLanguageDisplayName(locale, locale);

    }

    public String getLanguageDisplayName(Locale locale, Locale displayLocale) {

        String displayName;

        // Correction for the Basque language display name,

        // show it in Basque, not in Spanish

        if ("eu".equals(locale.getLanguage())

                && "vascuence".equals(locale.getDisplayLanguage())) {

            displayName = "Euskera";

        }

        // Patch for Valencian/Catalan

        else if ("ca".equals(locale.getLanguage())) {

            // displayName = Messages.getText("__valenciano");

            // if ("__valenciano".equals(displayName)) {

            // displayName = Messages.getText("__catalan");

            // }

            displayName = "Valenci?";

        }

        // Correction for the Galician language display name.

        else if ("gl".equals(locale.getLanguage())

                && "gallegan".equalsIgnoreCase(locale

                        .getDisplayLanguage(displayLocale))) {

            displayName = "Galego";

        } else {

            displayName = locale.getDisplayLanguage(displayLocale);

        }

        return capitalize(displayName);

    }

    public Locale getCurrentLocale() {

        return Locale.getDefault();

    }

    public Locale getDefaultSystemLocale() {

        String language, region, country, variant;

        language = (String) AccessController

                .doPrivileged(new GetPropertyAction("user.language", "en"));

        // for compatibility, check for old user.region property

        region = (String) AccessController.doPrivileged(new GetPropertyAction(

                "user.region"));

        if (region != null) {

            // region can be of form country, country_variant, or _variant

            int i = region.indexOf('_');

            if (i >= 0) {

                country = region.substring(0, i);

                variant = region.substring(i + 1);

            } else {

                country = region;

                variant = "";

            }

        } else {

            country = (String) AccessController

                    .doPrivileged(new GetPropertyAction("user.country", ""));

            variant = (String) AccessController

                    .doPrivileged(new GetPropertyAction("user.variant", ""));

        }

        return new Locale(language, country, variant);

    }

    public void setCurrentLocale(Locale locale) {

        AndamiConfig config = Launcher.getAndamiConfig();

        config.setLocaleLanguage(locale.getLanguage());

        config.setLocaleCountry(locale.getCountry());

        config.setLocaleVariant(locale.getVariant());

    }

    public Locale[] installLocales(File importFile) throws I18nException {

        List importLocales = new ArrayList();

        try {

            ZipFile zipFile = new ZipFile(importFile);

            Map locales = getZipFileNonReferenceLocales(zipFile);

            if (locales == null || locales.size() == 0) {

                return null;

            }

            for (Iterator iterator = locales.entrySet().iterator(); iterator

                    .hasNext();) {

                Entry entry = (Entry) iterator.next();

                String fileName = (String) entry.getKey();

                Locale locale = (Locale) entry.getValue();

                importLocales.add(locale);

                // Add the locale to the list of installed ones, if it

                // is new, otherwise, update the texts.

                if (!registeredLocales.contains(locale)) {

                    registeredLocales.add(locale);

                    storeInstalledLocales();

                }

                // Replace the old bundle with the new one

                ZipEntry zipEntry = zipFile.getEntry(fileName);

                InputStream is = zipFile.getInputStream(zipEntry);

                BufferedReader reader = new BufferedReader(

                        new InputStreamReader(is));

                File bundleFile = getResourceFile(locale);

                FileWriter fileWriter = new FileWriter(bundleFile);

                BufferedWriter writer = new BufferedWriter(fileWriter);

                String line;

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

                    writer.write(line);

                    writer.write('\n');

                }

                writer.flush();

                writer.close();

                fileWriter.close();

                reader.close();

                is.close();

            }

        } catch (Exception ex) {

            throw new InstallLocalesException(importFile, ex);

        }

        return (Locale[]) importLocales

                .toArray(new Locale[importLocales.size()]);

    }

    public void exportLocaleForUpdate(Locale locale, Locale referenceLocale,

            File exportFile) throws I18nException {

        exportLocalesForUpdate(new Locale[] { locale }, referenceLocale,

                exportFile);

    }

    public void exportLocalesForUpdate(Locale[] locales,

            Locale referenceLocale, File exportFile) throws I18nException {

        exportLocale(locales, new Locale[] { referenceLocale }, exportFile,

                true);

    }

    public void exportLocaleForTranslation(Locale locale,

            Locale referenceLocale, File exportFile) throws I18nException {

        exportLocaleForTranslation(locale, new Locale[] { referenceLocale },

                exportFile);

    }

    public void exportLocaleForTranslation(Locale locale,

            Locale[] referenceLocales, File exportFile) throws I18nException {

        exportLocale(new Locale[] { locale }, referenceLocales, exportFile,

                false);

    }

    public Locale[] getReferenceLocales() {

        return referenceLocales;

    }

    public void setReferenceLocales(Locale[] referenceLocales) {

        this.referenceLocales = referenceLocales;

    }

    public void setDefaultLocales(Locale[] defaultLocales) {

        this.defaultLocales = defaultLocales;

    }

    private void exportLocale(Locale[] locales, Locale[] referenceLocales,

            File exportFile, boolean update) throws I18nException {

        Locale[] refArray = getReferenceLocalesToExport(locales,

                referenceLocales);

        Set allReferenceKeys = new HashSet();

        Map referenceTexts = new HashMap(refArray.length);

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

            Map texts = getAllTexts(refArray[i]);

            referenceTexts.put(refArray[i], texts);

            allReferenceKeys.addAll(texts.keySet());

        }

        try {

            FileOutputStream fos = new FileOutputStream(exportFile);

            ZipOutputStream zipos = new ZipOutputStream(fos);

                // Create the index file

            writeZipFileLocales(zipos, locales, refArray);

                PrintStream ps = new PrintStream(zipos);

            Map texts = null;

                if (update) {

                // First, export the locales to update

                if (locales != null) {

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

                        texts = getAllTexts(locales[i]);

                        addPendingKeys(texts, allReferenceKeys);

                        putResourceInZip(zipos, ps, texts,

                                getResourceFileName(locales[i]));

                    }

                }

            } else { // translate

                // First, export the locales to translate, taking the keys from

                // the reference locales, but without values

                if (locales != null) {

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

                        putResourceInZip(zipos, ps, allReferenceKeys,

                                getResourceFileName(locales[i]));

                    }

                }

                }

            // Next, export the reference locales

            if (refArray != null) {

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

                    texts = getAllTexts(refArray[i]);

                    putResourceInZip(zipos, ps, texts,

                            getResourceFileName(refArray[i]));

                }

                }

            ps.flush();

            ps.close();

            zipos.close();

            fos.close();

        } catch (IOException ex) {

            throw new ExportLocaleException(locales, ex);

        }

    }

    /**

     * Adds the keys of the set to the map that aren't still contained in it

     * with a related empty String.

     *

     * @param texts

     *            the map to complete with the keys

     * @param allReferenceKeys

     *            the complete key set

     */

    private void addPendingKeys(Map texts, Set allReferenceKeys) {

        for (Iterator iterator = allReferenceKeys.iterator(); iterator

                .hasNext();) {

            Object key = (Object) iterator.next();

            if (!texts.containsKey(key)) {

                texts.put(key, "");

            }

        }

    }

    /**

     * Returns the list of reference locales to export, as the union of the

     * default reference locales list and the one selected as reference. The

     * locales to translate or update are extracted from the list.

     */

    private Locale[] getReferenceLocalesToExport(Locale[] locales,

            Locale[] referenceLocalesSelected) {

        // The reference locales to export are the default ones plus the

        // selected by the user.

        Set exportRefLocales = new HashSet(referenceLocales.length);

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

            exportRefLocales.add(referenceLocales[i]);

        }

        if (referenceLocalesSelected != null) {

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

                exportRefLocales.add(referenceLocalesSelected[i]);

            }

        }

        if (locales != null) {

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

                exportRefLocales.remove(locales[i]);

            }

        }

        Locale[] refArray = (Locale[]) exportRefLocales

                .toArray(new Locale[exportRefLocales.size()]);

        return refArray;

    }

    /**

     * Returns all the localized texts and its keys for a locale.

     */

    private Map getAllTexts(Locale locale) {

        return Messages.getAllTexts(locale);

    }

    private Map getZipFileNonReferenceLocales(ZipFile zipFile)

            throws I18nException {

        ZipEntry zipEntry = zipFile.getEntry(LOCALES_FILE_NAME);

        if (zipEntry == null) {

            return null;

        }

        Map locales;

        try {

            InputStream is = zipFile.getInputStream(zipEntry);

            BufferedReader reader = new BufferedReader(

                    new InputStreamReader(is));

            locales = new HashMap(2);

            String line;

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

                // The excepted format is:

                // FILENAME,LANGUAGE,COUNTRY,VARIANT,IS_REFERENCE

                StringTokenizer st = new StringTokenizer(line, CSV_SEPARATOR,

                        true);

                // First: locale file name (required)

                String fileName = st.nextToken();

                if (CSV_SEPARATOR.equals(fileName)) {

                    throw new LocaleFileNameRequiredException(line);

                } else {

                    // Read the next separator

                    st.nextToken();

                }

                // Second: the locale language (required)

                String language = st.nextToken();

                if (CSV_SEPARATOR.equals(language)) {

                    throw new LocaleLanguageRequiredException(line);

                } else {

                    // Read the next separator

                    st.nextToken();

                }

                // Third: the country

                String country = st.nextToken();

                if (CSV_SEPARATOR.equals(country)) {

                    country = null;

                } else {

                    // Read the next separator

                    st.nextToken();

                }

                // Fourth: the variant

                String variant = st.nextToken();

                if (CSV_SEPARATOR.equals(variant)) {

                    variant = null;

                } else {

                    // Read the next separator

                    st.nextToken();

                }

                // Fifth: is a reference locale?

                String refStr = st.nextToken();

                if (CSV_SEPARATOR.equals(refStr)) {

                    refStr = null;

                }

                // Only add non reference locales

                if (refStr != null && !"true".equals(refStr.toLowerCase())) {

                    // Variant only accepted if country defined

                    if (country == null) {

                        variant = null;

                    }

                    country = country == null ? "" : country;

                    variant = variant == null ? "" : variant;

                    Locale locale = new Locale(language, country, variant);

                    locales.put(fileName, locale);

                }

            }

            reader.close();

            is.close();

        } catch (IOException ex) {

            throw new ReadCSVLocalesFileException(ex);

        }

        return locales;

    }

    private void writeZipFileLocales(ZipOutputStream zos, Locale[] locales,

            Locale[] referenceLocales) throws IOException {

        ZipEntry zipEntry = new ZipEntry(LOCALES_FILE_NAME);

        zos.putNextEntry(zipEntry);

        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(zos));

        if (locales != null) {

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

                writeLocaleEntry(locales[i], writer, false);

            }

        }

        if (referenceLocales != null) {

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

                writeLocaleEntry(referenceLocales[i], writer, true);

            }

        }

        writer.flush();

        zos.closeEntry();

    }

    /**

     * Writes the locale entry into a writer.

     *

     * @param locale

     *            the locale to create the entry for

     * @param writer

     *            to write to

     * @param reference

     *            is it is a reference locale or not

     * @throws IOException

     *             if there is an error creating the locale entry

     */

    private void writeLocaleEntry(Locale locale, BufferedWriter writer,

            boolean reference) throws IOException {

        String language = locale.getLanguage();

        String country = locale.getCountry();

        country = country == null ? "" : country;

        String variant = locale.getVariant();

        variant = variant == null ? "" : variant;

        writer.write(getResourceFileName(locale));

        writer.write(',');

        writer.write(language);

        writer.write(',');

        writer.write(country);

        writer.write(',');

        writer.write(variant);

        writer.write(',');

        writer.write(Boolean.toString(reference));

        writer.write('\n');

    }

    /**

     * Returns if a locale is one of the default reference ones.

     */

    private boolean isReferenceLocale(Locale locale) {

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

            if (referenceLocales[i].equals(locale)) {

                return true;

            }

        }

        return false;

    }

    /**

     * Puts a new resource file into a Jar file.

     */

    private void putResourceInZip(ZipOutputStream zipos, PrintStream ps,

            Map texts, String resourceFileName) throws IOException {

        // Add ZIP entry for the resource bundle file

        zipos.putNextEntry(new ZipEntry(resourceFileName));

        for (Iterator iterator = texts.entrySet().iterator(); iterator

                .hasNext();) {

            Entry entry = (Entry) iterator.next();

            String keyEncoded = escape((String) entry.getKey(), true);

            ps.print(keyEncoded);

            ps.print("=");

            String valueEncoded = escape((String) entry.getValue(), false);

            ps.println(valueEncoded);

        }

        ps.flush();

        // Close the ZIP entry, the file is complete

        zipos.closeEntry();

    }

    /**

     * Puts a new resource file into a Jar file.

     */

    private void putResourceInZip(ZipOutputStream zipos, PrintStream ps,

            Set keys, String resourceFileName) throws IOException {

        // Add ZIP entry for the resource bundle file

        zipos.putNextEntry(new ZipEntry(resourceFileName));

        for (Iterator iterator = keys.iterator(); iterator.hasNext();) {

            String value = (String) iterator.next();

            String keyEncoded = escape(value, true);

            ps.print(keyEncoded);

            ps.print("=");

            ps.println();

        }

        ps.flush();

        // Close the ZIP entry, the file is complete

        zipos.closeEntry();

    }

    /**

     * Returns the file which contains the translations for a locale.

     */

    private File getResourceFile(Locale locale) {

        return new File(getResourcesFolder(), getResourceFileName(locale));

    }

    /**

     * Returns the name of the file which contains the translations for a

     * locale.

     */

    private String getResourceFileName(Locale locale) {

        StringBuffer fileName = new StringBuffer("text");

        // Spanish without country is the default locale

        if (!(isEmpty(locale.getCountry()) && "es".equals(locale.getLanguage()))) {

            fileName.append('_').append(locale.getLanguage());

        }

        // Add the locale country

        if (!isEmpty(locale.getCountry())) {

            fileName.append('_').append(locale.getCountry());

        }

        // Add the locale variant

        if (!isEmpty(locale.getVariant())) {

            fileName.append('_').append(locale.getVariant());

        }

        fileName.append(".properties");

        return fileName.toString();

    }

    /**

     * Returns the folder where to store the resource bundle files.

     */

    private File getResourcesFolder() {

        return PluginServices.getPluginServices("com.iver.cit.gvsig")

                .getPluginDirectory();

    }

    /**

     * Returns the child XMLEntity with the RegisteredLocales.

     */

    private XMLEntity getRegisteredLocalesPersistence() {

        XMLEntity entity = getI18nPersistence();

        XMLEntity child = null;

        for (int i = entity.getChildrenCount() - 1; i >= 0; i--) {

            XMLEntity tmpchild = entity.getChild(i);

            if (tmpchild.getName().equals(REGISTERED_LOCALES_PERSISTENCE)) {

                child = tmpchild;

                break;

            }

        }

        return child;

    }

    /**

     * Returns the I18n Plugin persistence.

     */

    private XMLEntity getI18nPersistence() {

        XMLEntity entity = PluginServices.getPluginServices(I18N_EXTENSION)

                .getPersistentXML();

        return entity;

    }

    /**

     * Returns the list of default locales bundled with gvSIG.

     */

    private Locale[] getDefaultLocales() {

        return defaultLocales;

    }

    /**

     * Stores the list of installed locales into the plugin persistence.

     */

    private void storeInstalledLocales() {

        XMLEntity localesEntity = getRegisteredLocalesPersistence();

        // Remove the previous list of registered languages

        if (localesEntity != null) {

            XMLEntity i18nPersistence = getI18nPersistence();

            for (int i = i18nPersistence.getChildrenCount() - 1; i >= 0; i--) {

                XMLEntity child = i18nPersistence.getChild(i);

                if (child.getName().equals(REGISTERED_LOCALES_PERSISTENCE)) {

                    i18nPersistence.removeChild(i);

                    break;

                }

            }

        }

        // Create the new persistence for the registered languages

        localesEntity = new XMLEntity();

        localesEntity.setName(REGISTERED_LOCALES_PERSISTENCE);

        for (Iterator iterator = registeredLocales.iterator(); iterator

                .hasNext();) {

            Locale locale = (Locale) iterator.next();

            XMLEntity localeEntity = new XMLEntity();

            localeEntity.setName(locale.getDisplayName());

            localeEntity.putProperty(LANGUAGE, locale.getLanguage());

            localeEntity.putProperty(COUNTRY, locale.getCountry());

            localeEntity.putProperty(VARIANT, locale.getVariant());

            localesEntity.addChild(localeEntity);

        }

        getI18nPersistence().addChild(localesEntity);

    }

    private String escape(String value, boolean replaceBlanks) {

        // First replace non printable characters

        if (replaceBlanks) {

            value = StringUtilities.replace(value, " ", "\\ ");

        }

        value = StringUtilities.replace(value, ":", "\\:");

        value = StringUtilities.replace(value, "\n", "\\n");

        value = StringUtilities.replace(value, "\t", "\\t");

        value = StringUtilities.replace(value, "\b", "\\b");

        value = StringUtilities.replace(value, "\f", "\\f");

        value = StringUtilities.replace(value, "\r", "\\r");

        // value = StringUtilities.replace(value, "\\", "\\\\");

        // value = StringUtilities.replace(value, "\'", "\\\'");

        // value = StringUtilities.replace(value, "\"", "\\\"");

        // Next, encode in raw-unicode-escape

        return toRawUnicodeEncoded(value);

    }

    private String toRawUnicodeEncoded(String value) {

        StringBuffer sb = new StringBuffer();

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

            char c = value.charAt(i);

            if (c <= 0x80) {

                sb.append(c);

            } else {

                sb.append("\\u");

                String hexValue = Integer.toHexString((int) c);

                // Append 0 if the hex value has less than 4 digits

                for (int j = hexValue.length(); j < 4; j++) {

                    sb.append('0');

                }

                sb.append(hexValue);

            }

        }

        return sb.toString();

    }

}