DefaultLocaleProvider.java

/*
 * (C) Copyright 2012 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * 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.
 *
 * Contributors:
 *     Sun Seng David TAN <stan@nuxeo.com>
 */
package org.nuxeo.ecm.platform.web.common.locale;

import java.util.List;
import java.util.Locale;
import java.util.TimeZone;

import org.apache.commons.lang.LocaleUtils;
import org.apache.commons.lang3.StringUtils;
import org.nuxeo.ecm.core.api.CoreSession;
import org.nuxeo.ecm.core.api.DocumentModel;
import org.nuxeo.ecm.platform.ui.web.auth.LoginScreenHelper;
import org.nuxeo.ecm.platform.ui.web.auth.service.LoginScreenConfig;

/**
 * Provides the default locale and timezone from the server.
 *
 * @since 5.6
 */
public class DefaultLocaleProvider implements LocaleProvider {

    @Override
    public Locale getLocale(CoreSession repo) {
        return getLocaleWithDefault(repo);
    }

    @Override
    public Locale getLocale(DocumentModel userProfileDoc) {
        return getLocaleWithDefault(userProfileDoc);
    }

    @Override
    public TimeZone getTimeZone(CoreSession repo) {
        return getDefaultTimezone();
    }

    @Override
    public Locale getLocaleWithDefault(CoreSession session) {
        return getDefaultLocale();
    }

    @Override
    public Locale getLocaleWithDefault(DocumentModel userProfileDoc) {
        return getDefaultLocale();
    }

    @Override
    public Locale getLocaleWithDefault(String requestedLocale) {
        Locale res = null;
        LoginScreenConfig screenConfig = LoginScreenHelper.getConfig();
        if (screenConfig != null) {
            List<String> supported = screenConfig.getSupportedLocales();
            if (!StringUtils.isBlank(requestedLocale) && supported.contains(requestedLocale)) {
                res = LocaleUtils.toLocale(requestedLocale);
            } else {
                res = LocaleUtils.toLocale(screenConfig.getDefaultLocale());
            }
        }
        if (res == null) {
            return Locale.getDefault();
        }
        return res;
    }

    protected Locale getDefaultLocale() {
        return getLocaleWithDefault((String) null);
    }

    protected TimeZone getDefaultTimezone() {
        return TimeZone.getDefault();
    }

}