Struts example source code file (LegacyPropertiesConfigurationProvider.java)

This example Struts source code file (LegacyPropertiesConfigurationProvider.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Struts tags/keywords

configurationexception, configurationexception, iterator, locale, locale, locatableproperties, logger, no, settings, settings, string, string, stringtokenizer, util, vm

The Struts LegacyPropertiesConfigurationProvider.java source code

/*
 * $Id: LegacyPropertiesConfigurationProvider.java 652734 2008-05-02 02:29:02Z mrdon $
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

package org.apache.struts2.config;

import java.util.Iterator;
import java.util.Locale;
import java.util.StringTokenizer;

import com.opensymphony.xwork2.config.Configuration;
import com.opensymphony.xwork2.config.ConfigurationException;
import com.opensymphony.xwork2.config.ConfigurationProvider;
import com.opensymphony.xwork2.inject.ContainerBuilder;
import com.opensymphony.xwork2.inject.Context;
import com.opensymphony.xwork2.inject.Factory;
import com.opensymphony.xwork2.inject.Inject;
import com.opensymphony.xwork2.util.location.LocatableProperties;
import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
import org.apache.struts2.StrutsConstants;

public class LegacyPropertiesConfigurationProvider implements ConfigurationProvider {

    /**
     * The Logging instance for this class.
     */
    private static final Logger LOG = LoggerFactory.getLogger(LegacyPropertiesConfigurationProvider.class);

    public void destroy() {
        Settings.reset();
    }

    public void init(Configuration configuration)
        throws ConfigurationException {
        Settings.reset();
    }
    
    public void loadPackages()
            throws ConfigurationException {
    }

    public boolean needsReload() {
        return false;
    }

    public void register(ContainerBuilder builder, LocatableProperties props)
            throws ConfigurationException {
        
        final Settings settings = Settings.getInstance();
        
        loadSettings(props, settings);
        
        // Set default locale by lazily resolving the locale property as needed into a Locale object
        builder.factory(Locale.class, new Factory() {
            private Locale locale;

            public synchronized Object create(Context context) throws Exception {
                if (locale == null) {
                    String loc = context.getContainer().getInstance(String.class, StrutsConstants.STRUTS_LOCALE);
                    if (loc != null) {
                        StringTokenizer localeTokens = new StringTokenizer(loc, "_");
                        String lang = null;
                        String country = null;

                        if (localeTokens.hasMoreTokens()) {
                            lang = localeTokens.nextToken();
                        }

                        if (localeTokens.hasMoreTokens()) {
                            country = localeTokens.nextToken();
                        }
                        locale = new Locale(lang, country);
                    } else {
                        LOG.info("No locale define, substituting the default VM locale");
                        locale = Locale.getDefault();
                    }
                }
                return locale;
            }
        });
    }

    /**
     * @param props
     * @param settings
     */
    protected void loadSettings(LocatableProperties props, final Settings settings) {
        // We are calling the impl methods to get around the single instance of Settings that is expected
        for (Iterator i = settings.listImpl(); i.hasNext(); ) {
            String name = (String) i.next();
            props.setProperty(name, settings.getImpl(name), settings.getLocationImpl(name));
        }
    }
}