/*
* 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.commons.configuration;
import java.util.Iterator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* A configuration based on the system properties.
*
* @author Emmanuel Bourg
* @version $Id: SystemConfiguration.java 1158888 2011-08-17 20:01:31Z oheger $
* @since 1.1
*/
public class SystemConfiguration extends MapConfiguration
{
/** The logger. */
private static Log log = LogFactory.getLog(SystemConfiguration.class);
/**
* Create a Configuration based on the system properties.
*
* @see System#getProperties
*/
public SystemConfiguration()
{
super(System.getProperties());
}
/**
* The method allows system properties to be set from a property file.
* @param fileName The name of the property file.
* @throws Exception if an error occurs.
* @since 1.6
*/
public static void setSystemProperties(String fileName) throws Exception
{
setSystemProperties(null, fileName);
}
/**
* The method allows system properties to be set from a property file.
* @param basePath The base path to look for the property file.
* @param fileName The name of the property file.
* @throws Exception if an error occurs.
* @since 1.6
*/
public static void setSystemProperties(String basePath, String fileName) throws Exception
{
PropertiesConfiguration config = fileName.endsWith(".xml")
? new XMLPropertiesConfiguration() : new PropertiesConfiguration();
if (basePath != null)
{
config.setBasePath(basePath);
}
config.setFileName(fileName);
config.load();
setSystemProperties(config);
}
/**
* Set System properties from a configuration file.
* @param systemConfig The configuration containing the properties to be set.
* @since 1.6
*/
public static void setSystemProperties(PropertiesConfiguration systemConfig)
{
Iterator iter = systemConfig.getKeys();
while (iter.hasNext())
{
String key = (String) iter.next();
String value = (String) systemConfig.getProperty(key);
if (log.isDebugEnabled())
{
log.debug("Setting system property " + key + " to " + value);
}
System.setProperty(key, value);
}
}
}
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