org.apache.jetspeed.util.ReloadablePropertyResourceBundle Maven / Gradle / Ivy
/*
* 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.jetspeed.util;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Enumeration;
import java.util.Locale;
import java.util.Properties;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
/**
* ReloadablePropertyResourceBundle
*
* @version $Id: ReloadablePropertyResourceBundle.java 918448 2010-03-03 12:42:02Z woonsan $
*/
public class ReloadablePropertyResourceBundle extends ResourceBundle
{
protected PropertyResourceBundle internalBundle;
protected String baseName;
protected Properties overridingProps;
public ReloadablePropertyResourceBundle(PropertyResourceBundle internalBundle, String baseName)
{
this.internalBundle = internalBundle;
setParent(internalBundle);
this.baseName = baseName;
}
/**
* Reloads resource bundle from the properties file which can be decided by the baseName.
* @param loader
* @throws IOException
*/
public void reload(ClassLoader loader) throws IOException
{
String bundleName = baseName;
Locale locale = getLocale();
if (locale != null)
{
String localeSuffix = locale.toString();
if (localeSuffix.length() > 0)
{
bundleName += "_" + localeSuffix;
}
else if (locale.getVariant().length() > 0)
{
bundleName += "___" + locale.getVariant();
}
}
String resPath = bundleName.replace('.', '/') + ".properties";
Properties props = new Properties();
InputStream is = null;
BufferedInputStream bis = null;
try
{
URL url = loader.getResource(resPath);
if ("file".equals(url.getProtocol()))
{
is = new FileInputStream(new File(url.toURI()));
}
else
{
is = url.openStream();
}
bis = new BufferedInputStream(is);
props.load(bis);
if (!props.isEmpty())
{
overridingProps = props;
}
}
catch (URISyntaxException e)
{
throw new IOException(e.toString());
}
finally
{
if (bis != null)
{
try
{
bis.close();
}
catch (Exception ignore)
{
}
}
if (is != null)
{
try
{
is.close();
}
catch (Exception ignore)
{
}
}
}
}
/**
* Resets overriding properties.
*/
public void reset()
{
overridingProps = null;
}
@Override
public Locale getLocale()
{
return internalBundle.getLocale();
}
@Override
public Enumeration getKeys()
{
if (overridingProps != null)
{
return new TypedEnumeration(overridingProps.keys());
}
return internalBundle.getKeys();
}
@Override
protected Object handleGetObject(String key)
{
if (overridingProps != null)
{
return overridingProps.getProperty(key);
}
return null;
}
private class TypedEnumeration implements Enumeration
{
private Enumeration