// Copyright 2005 The Apache Software Foundation
//
// 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.
package org.apache.tapestry.services.impl;
import java.util.Locale;
import org.apache.hivemind.util.Defense;
import org.apache.hivemind.util.LocalizedNameGenerator;
import org.apache.tapestry.engine.IPropertySource;
/**
* Wraps around a {@link org.apache.tapestry.engine.IPropertySource}to query a series of localized
* keys.
* <p>
* This is much simpler than the old {@link org.apache.tapestry.util.LocalizedPropertySource}, and
* allows the locale to be specified on a thread-safe, per-invocation basis.
*
* @author Howard M. Lewis Ship
* @since 4.0
*/
public class LocalizedPropertySource
{
private IPropertySource _source;
public LocalizedPropertySource(IPropertySource source)
{
Defense.notNull(source, "source");
_source = source;
}
/**
* Get the property from the source, trying different variations of propertyName (adding
* suffixes).
*
* @param propertyName
* the base property name to search with.
* @param local
* the Locale used to generate suffixes (may be null).
*/
public String getPropertyValue(String propertyName, Locale locale)
{
Defense.notNull(propertyName, "propertyName");
LocalizedNameGenerator g = new LocalizedNameGenerator(propertyName, locale, "");
while (g.more())
{
String localizedName = g.next();
String result = _source.getPropertyValue(localizedName);
if (result != null)
return result;
}
return null;
}
}