nu.yona.server.Translator.java Source code

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Here is the source code for nu.yona.server.Translator.java

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/*******************************************************************************
 * Copyright (c) 2016, 2018 Stichting Yona Foundation This Source Code Form is subject to the terms of the Mozilla Public License,
 * v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
 *******************************************************************************/
package nu.yona.server;

import java.text.MessageFormat;
import java.util.Locale;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.MessageSource;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.context.event.EventListener;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.stereotype.Service;

@Service
public class Translator {
    public static final Locale EN_US_LOCALE = Locale.forLanguageTag("en-US");

    /** The translator is set upon initialization of the context */
    private static Translator staticReference;

    /** The source for the messages to use */
    @Autowired
    @Qualifier("messageSource")
    private MessageSource msgSource;

    @EventListener({ ContextRefreshedEvent.class })
    void onContextStarted(ContextRefreshedEvent event) {
        Translator.staticReference = this;
    }

    /**
     * This method returns the translated and formatted message for the passed message ID and parameters based on the given locale
     * 
     * @return The actual message based on the default locale.
     */
    public String getLocalizedMessage(String messageId, Object... parameters) {
        return getLocalizedMessage(messageId, parameters, null);
    }

    /**
     * This method returns the translated and formatted message for the passed message ID and parameters based on the given locale
     * 
     * @param locale The locale to use for getting the message.
     * @return The actual message based on the given locale.
     */
    public String getLocalizedMessage(String messageId, Object[] parameters, Locale locale) {
        if (locale == null) {
            locale = LocaleContextHolder.getLocale();
        }

        return msgSource.getMessage(messageId, parameters, locale);
    }

    public static Translator getInstance() {
        return staticReference;
    }

    public static String getStandardLocaleString(Locale locale) {
        return locale.toString().replace('_', '-');
    }

    public static String buildLocaleSpecificResourcePath(String format) {
        return MessageFormat.format(format, determineLocaleInfix());
    }

    private static Object determineLocaleInfix() {
        Locale locale = LocaleContextHolder.getLocale();
        if (locale.equals(EN_US_LOCALE)) {
            return "";
        }
        return "_" + locale.getLanguage();
    }
}