ro.nextreports.server.web.language.LanguageManager.java Source code

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Here is the source code for ro.nextreports.server.web.language.LanguageManager.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package ro.nextreports.server.web.language;

import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Set;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.filefilter.TrueFileFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class LanguageManager {

    private static final Logger LOG = LoggerFactory.getLogger(LanguageManager.class);

    public static final String LANGUAGE_ENGLISH = "en";
    public static final String COUNTRY_ENGLISH = "US";
    public static final String PROPERTY_NAME_ENGLISH = LANGUAGE_ENGLISH + "_" + COUNTRY_ENGLISH;

    public static final String LANGUAGE_FRENCH = "fr";
    public static final String COUNTRY_FRENCH = "FR";
    public static final String PROPERTY_NAME_FRENCH = LANGUAGE_FRENCH + "_" + COUNTRY_FRENCH;

    public static final String LANGUAGE_ROMANIAN = "ro";
    public static final String COUNTRY_ROMANIAN = "RO";
    public static final String PROPERTY_NAME_ROMANIAN = LANGUAGE_ROMANIAN + "_" + COUNTRY_ROMANIAN;

    public static final String LANGUAGE_POLISH = "pl";
    public static final String COUNTRY_POLISH = "PL";
    public static final String PROPERTY_NAME_POLISH = LANGUAGE_POLISH + "_" + COUNTRY_POLISH;

    public static final String LANGUAGE_RUSSIAN = "ru";
    public static final String COUNTRY_RUSSIAN = "RU";
    public static final String PROPERTY_NAME_RUSSIAN = LANGUAGE_RUSSIAN + "_" + COUNTRY_RUSSIAN;

    public static final List<Language> languages = new ArrayList<Language>();
    public static final List<String> LANGUAGES = new ArrayList<String>();

    private static LanguageManager instance;

    @SuppressWarnings("unchecked")
    private LanguageManager() {

        languages.add(new Language(LANGUAGE_ENGLISH, COUNTRY_ENGLISH, PROPERTY_NAME_ENGLISH));
        languages.add(new Language(LANGUAGE_FRENCH, COUNTRY_FRENCH, PROPERTY_NAME_FRENCH));
        languages.add(new Language(LANGUAGE_ROMANIAN, COUNTRY_ROMANIAN, PROPERTY_NAME_ROMANIAN));
        languages.add(new Language(LANGUAGE_POLISH, COUNTRY_POLISH, PROPERTY_NAME_POLISH));
        languages.add(new Language(LANGUAGE_RUSSIAN, COUNTRY_RUSSIAN, PROPERTY_NAME_RUSSIAN));

        LANGUAGES.add(PROPERTY_NAME_ENGLISH);
        LANGUAGES.add(PROPERTY_NAME_FRENCH);
        LANGUAGES.add(PROPERTY_NAME_ROMANIAN);
        LANGUAGES.add(PROPERTY_NAME_POLISH);
        LANGUAGES.add(PROPERTY_NAME_RUSSIAN);

        // try to see if other internatinalization filee where added by hand
        // must have name like NextServerApplication_<lang>_<country>.properties
        // you must add in all other i18n files the property:
        // Settings.personalize.language.<lang>_<country> to see it in seetings
        Collection<File> files = FileUtils.listFiles(new File("."), I18NFileFilter.INSTANCE,
                TrueFileFilter.INSTANCE);
        Set<String> fileNames = new HashSet<String>();
        for (File file : files) {
            String name = file.getName();
            String baseName = name.substring(0, name.indexOf(".properties"));
            String[] s = baseName.split("_");
            if (s.length == 3) {
                fileNames.add(name);
                languages.add(new Language(s[1], s[2], s[1] + "_" + s[2]));
                LANGUAGES.add(s[1] + "_" + s[2]);
            }
        }
    }

    public static synchronized LanguageManager getInstance() {
        if (instance == null) {
            instance = new LanguageManager();
        }
        return instance;
    }

    public Locale getLocale(String languageProperty) {
        Locale locale = new Locale(getLanguage(languageProperty), getCountry(languageProperty));
        Locale.setDefault(locale);
        return locale;
    }

    private String getLanguage(String languageProperty) {
        for (int i = 0; i < languages.size(); i++) {
            if (languages.get(i).getProperty().equals(languageProperty)) {
                return languages.get(i).getLanguage();
            }
        }
        return languages.get(0).getLanguage();
    }

    private String getCountry(String languageProperty) {
        for (int i = 0; i < languages.size(); i++) {
            if (languages.get(i).getProperty().equals(languageProperty)) {
                return languages.get(i).getCountry();
            }
        }
        return languages.get(0).getCountry();
    }

}