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/*
 * 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.log4j.spi;

/**
 * A string based interface to configure package components.
 *
 * @author Ceki Gülcü
 * @author Anders Kristensen
 * @since 0.8.1
 */
public interface OptionHandler {

    /**
     * Activate the options that were previously set with calls to option setters.
     *
     * 
     * 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.
     *
     * 

     * 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 option to value.
     *
     * 
     * 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);
}