/*

 * Copyright (c) 1997, 2010, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

package com.sun.istack.internal.localization;

import java.text.MessageFormat;

import java.util.HashMap;

import java.util.Locale;

import java.util.MissingResourceException;

import java.util.ResourceBundle;

/**

 * Localizes the {@link Localizable} into a message

 * by using a configured {@link Locale}.

 *

 * @author WS Development Team

 */

public class Localizer {

    private final Locale _locale;

    private final HashMap _resourceBundles;

    public Localizer() {

        this(Locale.getDefault());

    }

    public Localizer(Locale l) {

        _locale = l;

        _resourceBundles = new HashMap();

    }

    public Locale getLocale() {

        return _locale;

    }

    public String localize(Localizable l) {

        String key = l.getKey();

        if (key == Localizable.NOT_LOCALIZABLE) {

            // this message is not localizable

            return (String) l.getArguments()[0];

        }

        String bundlename = l.getResourceBundleName();

        try {

            ResourceBundle bundle =

                (ResourceBundle) _resourceBundles.get(bundlename);

            if (bundle == null) {

                try {

                    bundle = ResourceBundle.getBundle(bundlename, _locale);

                } catch (MissingResourceException e) {

                    // work around a bug in the com.sun.enterprise.deployment.WebBundleArchivist:

                    //   all files with an extension different from .class (hence all the .properties files)

                    //   get copied to the top level directory instead of being in the package where they

                    //   are defined

                    // so, since we can't find the bundle under its proper name, we look for it under

                    //   the top-level package

                    int i = bundlename.lastIndexOf('.');

                    if (i != -1) {

                        String alternateBundleName =

                            bundlename.substring(i + 1);

                        try {

                            bundle =

                                ResourceBundle.getBundle(

                                    alternateBundleName,

                                    _locale);

                        } catch (MissingResourceException e2) {

                            // give up

                            return getDefaultMessage(l);

                        }

                    }

                }

                _resourceBundles.put(bundlename, bundle);

            }

            if (bundle == null) {

                return getDefaultMessage(l);

            }

            if (key == null)

                key = "undefined";

            String msg;

            try {

                msg = bundle.getString(key);

            } catch (MissingResourceException e) {

                // notice that this may throw a MissingResourceException of its own (caught below)

                msg = bundle.getString("undefined");

            }

            // localize all arguments to the given localizable object

            Object[] args = l.getArguments();

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

                if (args[i] instanceof Localizable)

                    args[i] = localize((Localizable) args[i]);

            }

            String message = MessageFormat.format(msg, args);

            return message;

        } catch (MissingResourceException e) {

            return getDefaultMessage(l);

        }

    }

    private String getDefaultMessage(Localizable l) {

        String key = l.getKey();

        Object[] args = l.getArguments();

        StringBuilder sb = new StringBuilder();

        sb.append("[failed to localize] ");

        sb.append(key);

        if (args != null) {

            sb.append('(');

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

                if (i != 0)

                    sb.append(", ");

                sb.append(String.valueOf(args[i]));

            }

            sb.append(')');

        }

        return sb.toString();

    }

}