/*
* 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.empire.struts2.actionsupport;
import java.util.Hashtable;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.opensymphony.xwork2.LocaleProvider;
import com.opensymphony.xwork2.ResourceBundleTextProvider;
import com.opensymphony.xwork2.TextProvider;
import com.opensymphony.xwork2.TextProviderSupport;
public class TextProviderActionSupport extends TextProviderSupport
{
private static Map<Locale, Map<String, String>> maps = new Hashtable<Locale, Map<String, String>>();
protected static Log log = LogFactory.getLog(TextProviderActionSupport.class);
private static final String INVALID_TEXT = "NO_TEXT";
private LocaleProvider aLocaleProvider;
private static boolean cachingEnabled=true;
public static void setCachingEnabled(boolean enable)
{
cachingEnabled = enable;
if (cachingEnabled)
log.info(TextProviderActionSupport.class.getName() + ": Ccaching has been enabled.");
else
log.warn(TextProviderActionSupport.class.getName() + ": Caching is NOT enabled for Application!");
}
// ------- Singleton Constructor -------
private TextProviderActionSupport(LocaleProvider provider)
{
this.aLocaleProvider = provider;
((ResourceBundleTextProvider) this).setLocaleProvider(provider);
}
// ------- Singleton getInstance -------
public static TextProvider getInstance(Class clazz, LocaleProvider provider)
{
TextProvider instance=new TextProviderActionSupport(provider);
if (instance instanceof ResourceBundleTextProvider)
{
((ResourceBundleTextProvider) instance).setClazz(clazz);
}
return instance;
}
// ------- Properties -------
public static boolean isCachingEnabled()
{
return cachingEnabled;
}
// ------- Overrides -------
@Override
public String getText(String key, String defaultValue, List args)
{
if(key==null)
{
log.debug("NULL key supplied to TextProviderActionSupport, NULL is not permitted!");
return INVALID_TEXT;
}
// simple texts can be stored in our Hashtable
if(cachingEnabled && (args==null || args.size()==0)){
Map<String, String> map = getMap(aLocaleProvider.getLocale());
if(map.containsKey(key))
{
// read value from map
return map.get(key);
}
else
{
// insert value into map
String value = super.getText(key, defaultValue, args);
if(value==null)
{
log.debug("NULL value returned in TextProviderActionSupport, NULL is not permitted!");
return INVALID_TEXT;
}
map.put(key, value);
return value;
}
}
return super.getText(key, defaultValue, args);
}
// ------- Helpers -------
private Map<String, String> getMap(Locale l)
{
Map<String, String> map;
map = maps.get(l);
if(map==null)
{
map=new Hashtable<String, String>();
maps.put(l, map);
}
return map;
}
}