WebConfiguration.java

/**
 * Personalfragebogen 2.0. Revolutionize form data entry for taxation and
 * other purposes.
 * Copyright (C) 2015 Attila Bujaki, Werner Sembach, Jonas Gröger, Oswaldo
 *     Bejarano, Ardhi Sutadi, Nikitha Mohan, Benedikt Rauh
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package de.fau.amos4.configuration;

import java.nio.charset.Charset;
import java.util.Locale;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ReloadableResourceBundleMessageSource;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
import org.springframework.web.servlet.i18n.SessionLocaleResolver;

/**
 * Needed for changing the locale using buttons on the web page.
 * Functions messageSource and stringHttpMessageConverter most likely not necessary.
 * 
 */
@Configuration
public class WebConfiguration extends WebMvcConfigurerAdapter
{
    @Bean
    public ReloadableResourceBundleMessageSource messageSource()
    {
        String[] basenames = {"classpath:messages"};

        ReloadableResourceBundleMessageSource resourceBundle = new ReloadableResourceBundleMessageSource();
        resourceBundle.setBasenames(basenames);
        resourceBundle.setDefaultEncoding("UTF-8");
        return resourceBundle;
    }

    @Bean
    public StringHttpMessageConverter stringHttpMessageConverter()
    {
        return new StringHttpMessageConverter(Charset.forName("UTF-8"));
    }

    @Bean
    public LocaleResolver localeResolver()
    {
        SessionLocaleResolver slr = new SessionLocaleResolver();
        slr.setDefaultLocale(Locale.GERMANY);
        return slr;
    }

    @Bean
    public LocaleChangeInterceptor localeChangeInterceptor()
    {
        LocaleChangeInterceptor lci = new LocaleChangeInterceptor();
        lci.setParamName("lang");
        return lci;
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry)
    {
        registry.addInterceptor(localeChangeInterceptor());
    }
}