001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.log4j.xml; 018 019import org.w3c.dom.Element; 020import java.util.Properties; 021 022/** 023 * When implemented by an object configured by DOMConfigurator, 024 * the handle method will be called when an unrecognized child 025 * element is encountered. Unrecognized child elements of 026 * the log4j:configuration element will be dispatched to 027 * the logger repository if it supports this interface. 028 * 029 * @since 1.2.15 030 */ 031public interface UnrecognizedElementHandler { 032 /** 033 * Called to inform a configured object when 034 * an unrecognized child element is encountered. 035 * @param element element, may not be null. 036 * @param props properties in force, may be null. 037 * @return true if configured object recognized the element 038 * @throws Exception throw an exception to prevent activation 039 * of the configured object. 040 */ 041 boolean parseUnrecognizedElement(Element element, Properties props) throws Exception; 042}