/* * Copyright 1999-2005 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.log4j.spi;/**   A string based interface to configure package components.   @author Ceki G&uuml;lc&uuml;   @author Anders Kristensen   @since 0.8.1 */public interface OptionHandler {  /**     Activate the options that were previously set with calls to option     setters.     <p>This allows to defer activiation of the options until all     options have been set. This is required for components which have     related options that remain ambigous until all are set.     <p>For example, the FileAppender has the {@link     org.apache.log4j.FileAppender#setFile File} and {@link     org.apache.log4j.FileAppender#setAppend Append} options both of     which are ambigous until the other is also set.  */  void activateOptions();  /**     Return list of strings that the OptionHandler instance recognizes.     @deprecated We now use JavaBeans style getters/setters.   */  //  String[] getOptionStrings();  /**     Set <code>option</code> to <code>value</code>.     <p>The handling of each option depends on the OptionHandler     instance. Some options may become active immediately whereas     other may be activated only when {@link #activateOptions} is     called.     @deprecated We now use JavaBeans style getters/setters.  */  //void setOption(String option, String value);}