org.cee.service.language.LanguageService.java Source code

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Here is the source code for org.cee.service.language.LanguageService.java

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package org.cee.service.language;

/*
 * #%L
 * Content Extraction Engine - Services
 * %%
 * Copyright (C) 2013 - 2015 Andreas Behnke
 * %%
 * Licensed 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.
 * #L%
 */

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;

import org.cee.client.language.LanguageList;
import org.cee.search.ArticleSearchService;
import org.cee.store.EntityKey;
import org.springframework.context.i18n.LocaleContextHolder;

public class LanguageService {

    private ArticleSearchService searchService;

    public void setSearchService(ArticleSearchService searchService) {
        this.searchService = searchService;
    }

    public LanguageList getSupportedLanguages() {
        List<String> langIds = searchService.getSupportedLanguages();
        if (langIds == null) {
            //search service does not support languages at all, provide user with full list of languages
            langIds = Arrays.asList(Locale.getISOLanguages());
        }
        List<EntityKey> languages = new ArrayList<EntityKey>();
        int defaultLanguageIndex = 0;
        String defaultLanguage = "en";
        Locale currentUserLocale = LocaleContextHolder.getLocaleContext().getLocale();
        if (currentUserLocale != null) {
            defaultLanguage = currentUserLocale.getLanguage();
        }
        for (String langId : langIds) {
            Locale locale = Locale.forLanguageTag(langId);
            if (locale != null) {
                if (locale.getLanguage().startsWith(defaultLanguage)
                        || defaultLanguage.startsWith(locale.getLanguage())) {
                    defaultLanguageIndex = languages.size();
                }
                languages.add(EntityKey.get(locale.getDisplayLanguage(), langId));
            } else {
                languages.add(EntityKey.get(langId, langId));
            }
        }
        LanguageList languageList = new LanguageList();
        languageList.setLanguages(languages);
        languageList.setDefaultLanguage(defaultLanguageIndex);
        return languageList;
    }
}