LightPIT: src/main/java/de/uapcore/lightpit/modules/LanguageModule.java@276ef00a336d

fixes handler signatures and one compile error for AbstractDao.setForeignKeyOrNull()

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  *

     4  * Copyright 2018 Mike Becker. All rights reserved.

     5  *

     6  * Redistribution and use in source and binary forms, with or without

     7  * modification, are permitted provided that the following conditions are met:

     8  *

     9  *   1. Redistributions of source code must retain the above copyright

    10  *      notice, this list of conditions and the following disclaimer.

    11  *

    12  *   2. Redistributions in binary form must reproduce the above copyright

    13  *      notice, this list of conditions and the following disclaimer in the

    14  *      documentation and/or other materials provided with the distribution.

    15  *

    16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

    20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    26  * POSSIBILITY OF SUCH DAMAGE.

    27  *

    28  */

    29 package de.uapcore.lightpit.modules;

    31 import de.uapcore.lightpit.*;

    32 import de.uapcore.lightpit.dao.DataAccessObjects;

    33 import org.slf4j.Logger;

    34 import org.slf4j.LoggerFactory;

    36 import javax.servlet.ServletException;

    37 import javax.servlet.annotation.WebServlet;

    38 import javax.servlet.http.HttpServletRequest;

    39 import javax.servlet.http.HttpServletResponse;

    40 import java.util.*;

    43 @LightPITModule(

    44         bundleBaseName = "localization.language",

    45         modulePath = "language",

    46         defaultPriority = 20000

    47 )

    48 @WebServlet(

    49         name = "LanguageModule",

    50         urlPatterns = "/language/*"

    51 )

    52 public final class LanguageModule extends AbstractLightPITServlet {

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

    56     private final List<Locale> languages = new ArrayList<>();

    58     @Override

    59     public void init() throws ServletException {

    60         super.init();

    62         Optional<String[]> langs = Functions.availableLanguages(getServletContext());

    63         if (langs.isPresent()) {

    64             for (String lang : langs.get()) {

    65                 try {

    66                     Locale locale = Locale.forLanguageTag(lang);

    67                     if (locale.getLanguage().isEmpty()) {

    68                         throw new IllformedLocaleException();

    69                     }

    70                     languages.add(locale);

    71                 } catch (IllformedLocaleException ex) {

    72                     LOG.warn("Specified language {} in context parameter cannot be mapped to an existing locale - skipping.", lang);

    73                 }

    74             }

    76         } else {

    77             languages.add(Locale.ENGLISH);

    78             LOG.warn("Context parameter 'available-languages' not found. Only english will be available.");

    79         }

    80     }

    82     @Override

    83     public void destroy() {

    84         super.destroy();

    85         languages.clear();

    86     }

    88     @RequestMapping(method = HttpMethod.GET)

    89     public ResponseType handle(HttpServletRequest req, HttpServletResponse resp, DataAccessObjects dao) {

    91         req.setAttribute("languages", languages);

    92         req.setAttribute("browserLanguage", req.getLocale());

    94         setStylesheet(req, "language");

    95         setDynamicFragment(req, "language");

    96         return ResponseType.HTML_FULL;

    97     }

    99     @RequestMapping(method = HttpMethod.POST)

   100     public ResponseType switchLanguage(HttpServletRequest req, HttpServletResponse resp, DataAccessObjects dao) {

   102         Optional<Locale> chosenLanguage = Optional.ofNullable(req.getParameter("language"))

   103                 .map(Locale::forLanguageTag)

   104                 .filter((l) -> !l.getLanguage().isEmpty());

   106         chosenLanguage.ifPresent((l) -> req.getSession().setAttribute(Constants.SESSION_ATTR_LANGUAGE, l));

   107         chosenLanguage.ifPresent(resp::setLocale);

   109         return handle(req, resp, dao);

   110     }

   111 }

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