| /* |
| * 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.configuration2; |
| |
| import java.util.Iterator; |
| |
| import org.apache.commons.configuration2.ex.ConfigurationException; |
| import org.apache.commons.configuration2.io.FileHandler; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| /** |
| * A configuration based on the system properties. |
| * |
| * @author Emmanuel Bourg |
| * @version $Id$ |
| * @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()); |
| } |
| |
| /** |
| * Sets system properties from a file specified by its file name. This is |
| * just a short cut for {@code setSystemProperties(null, fileName)}. |
| * |
| * @param fileName The name of the property file. |
| * @throws ConfigurationException if an error occurs. |
| * @since 1.6 |
| */ |
| public static void setSystemProperties(String fileName) |
| throws ConfigurationException |
| { |
| setSystemProperties(null, fileName); |
| } |
| |
| /** |
| * Sets system properties from a file specified using its base path and |
| * file name. The file can either be a properties file or an XML properties |
| * file. It is loaded, and all properties it contains are added to system |
| * properties. |
| * |
| * @param basePath The base path to look for the property file. |
| * @param fileName The name of the property file. |
| * @throws ConfigurationException if an error occurs. |
| * @since 1.6 |
| */ |
| public static void setSystemProperties(String basePath, String fileName) |
| throws ConfigurationException |
| { |
| FileBasedConfiguration config = |
| fileName.endsWith(".xml") ? new XMLPropertiesConfiguration() |
| : new PropertiesConfiguration(); |
| |
| FileHandler handler = new FileHandler(config); |
| handler.setBasePath(basePath); |
| handler.setFileName(fileName); |
| handler.load(); |
| setSystemProperties(config); |
| } |
| |
| /** |
| * Set System properties from a configuration object. |
| * @param systemConfig The configuration containing the properties to be set. |
| * @since 1.6 |
| */ |
| public static void setSystemProperties(Configuration systemConfig) |
| { |
| Iterator<String> iter = systemConfig.getKeys(); |
| while (iter.hasNext()) |
| { |
| String key = iter.next(); |
| String value = (String) systemConfig.getProperty(key); |
| if (log.isDebugEnabled()) |
| { |
| log.debug("Setting system property " + key + " to " + value); |
| } |
| System.setProperty(key, value); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} This implementation returns a snapshot of the keys in the |
| * system properties. If another thread modifies system properties concurrently, |
| * these changes are not reflected by the iterator returned by this method. |
| */ |
| @Override |
| protected Iterator<String> getKeysInternal() |
| { |
| return System.getProperties().stringPropertyNames().iterator(); |
| } |
| } |