/* * 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;import org.apache.log4j.spi.LoggerRepository;import java.net.URL;/**   Implemented by classes capable of configuring log4j using a URL.      @since 1.0   @author Anders Kristensen */public interface Configurator {  /**     Special level value signifying inherited behaviour. The current     value of this string constant is <b>inherited</b>. {@link #NULL}     is a synonym.  */  public static final String INHERITED = "inherited";  /**     Special level signifying inherited behaviour, same as {@link     #INHERITED}. The current value of this string constant is     <b>null</b>. */  public static final String NULL = "null";  /**     Interpret a resource pointed by a URL and set up log4j accordingly.     The configuration is done relative to the <code>hierarchy</code>     parameter.     @param url The URL to parse     @param repository The hierarchy to operation upon.   */  void doConfigure(URL url, LoggerRepository repository);}