    001    // Copyright 2007, 2008, 2009, 2010, 2011 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    // http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.internal.services;
    016
    017    import java.util.Locale;
    018    import java.util.Set;
    019
    020    import org.apache.tapestry5.SymbolConstants;
    021    import org.apache.tapestry5.internal.TapestryInternalUtils;
    022    import org.apache.tapestry5.ioc.annotations.Symbol;
    023    import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
    024    import org.apache.tapestry5.ioc.services.PerThreadValue;
    025    import org.apache.tapestry5.ioc.services.PerthreadManager;
    026    import org.apache.tapestry5.services.PersistentLocale;
    027
    028    public class PersistentLocaleImpl implements PersistentLocale
    029    {
    030        private final String supportedLocales;
    031
    032        private final PerThreadValue<Locale> localeValue;
    033
    034        private final Set<String> localeNames = CollectionFactory.newSet();
    035
    036        public PersistentLocaleImpl(PerthreadManager perThreadManager,
    037
    038        @Symbol(SymbolConstants.SUPPORTED_LOCALES)
    039        String supportedLocales)
    040        {
    041            this.supportedLocales = supportedLocales;
    042
    043            localeValue = perThreadManager.createValue();
    044
    045            for (String name : TapestryInternalUtils.splitAtCommas(supportedLocales))
    046            {
    047                localeNames.add(name.toLowerCase());
    048            }
    049        }
    050
    051        public void set(Locale locale)
    052        {
    053            assert locale != null;
    054
    055            if (!localeNames.contains(locale.toString().toLowerCase()))
    056            {
    057                String message = String
    058                        .format("Locale '%s' is not supported by this application. Supported locales are '%s'; this is configured via the %s symbol.",
    059                                locale, supportedLocales, SymbolConstants.SUPPORTED_LOCALES);
    060
    061                throw new IllegalArgumentException(message);
    062            }
    063
    064            localeValue.set(locale);
    065        }
    066
    067        public Locale get()
    068        {
    069            return localeValue.get();
    070        }
    071
    072        public boolean isSet()
    073        {
    074            return localeValue.exists();
    075        }
    076    }