| /* |
| * 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 java.util.List; |
| import java.util.Map; |
| import java.util.Properties; |
| |
| import org.apache.commons.configuration2.convert.ListDelimiterHandler; |
| import org.apache.commons.lang3.StringUtils; |
| |
| /** |
| * Configuration converter. Helper class to convert between Configuration, |
| * ExtendedProperties and standard Properties. |
| * |
| * @author <a href="mailto:mpoeschl@marmot.at">Martin Poeschl</a> |
| * @version $Id$ |
| */ |
| public final class ConfigurationConverter |
| { |
| /** Constant for the default separator for properties with multiple values. */ |
| private static final char DEFAULT_SEPARATOR = ','; |
| |
| /** |
| * Private constructor prevents instances from being created. |
| */ |
| private ConfigurationConverter() |
| { |
| // to prevent instanciation... |
| } |
| |
| /** |
| * Convert a standard Properties class into a configuration class. |
| * |
| * @param props properties object to convert |
| * @return Configuration configuration created from the Properties |
| */ |
| public static Configuration getConfiguration(Properties props) |
| { |
| return new MapConfiguration(props); |
| } |
| |
| /** |
| * Convert a Configuration class into a Properties class. List properties |
| * are joined into a string using either the list delimiter handler of the |
| * configuration (if it extends AbstractConfiguration) or with a comma as |
| * delimiter otherwise. |
| * |
| * @param config Configuration object to convert |
| * @return Properties created from the Configuration |
| */ |
| public static Properties getProperties(Configuration config) |
| { |
| Properties props = new Properties(); |
| ListDelimiterHandler listHandler; |
| boolean useDelimiterHandler; |
| |
| if (config instanceof AbstractConfiguration) |
| { |
| listHandler = ((AbstractConfiguration) config).getListDelimiterHandler(); |
| useDelimiterHandler = true; |
| } |
| else |
| { |
| listHandler = null; |
| useDelimiterHandler = false; |
| } |
| |
| for (Iterator<String> keys = config.getKeys(); keys.hasNext();) |
| { |
| String key = keys.next(); |
| List<Object> list = config.getList(key); |
| |
| String propValue; |
| if (useDelimiterHandler) |
| { |
| try |
| { |
| propValue = |
| String.valueOf(listHandler.escapeList(list, |
| ListDelimiterHandler.NOOP_TRANSFORMER)); |
| } |
| catch (Exception ex) |
| { |
| // obviously, the list handler does not support splitting |
| useDelimiterHandler = false; |
| propValue = listToString(list); |
| } |
| } |
| else |
| { |
| propValue = listToString(list); |
| } |
| |
| props.setProperty(key, propValue); |
| } |
| |
| return props; |
| } |
| |
| /** |
| * Convert a Configuration class into a Map class. |
| * |
| * @param config Configuration object to convert |
| * @return Map created from the Configuration |
| */ |
| public static Map<Object, Object> getMap(Configuration config) |
| { |
| return new ConfigurationMap(config); |
| } |
| |
| /** |
| * Helper method for joining all elements of a list to a string using the |
| * default value separator. |
| * |
| * @param list the list |
| * @return the resulting string |
| */ |
| private static String listToString(List<?> list) |
| { |
| return StringUtils.join(list, DEFAULT_SEPARATOR); |
| } |
| } |