1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.log4j.xml; 18 19 import org.w3c.dom.Element; 20 import java.util.Properties; 21 22 /** 23 * When implemented by an object configured by DOMConfigurator, 24 * the handle method will be called when an unrecognized child 25 * element is encountered. Unrecognized child elements of 26 * the log4j:configuration element will be dispatched to 27 * the logger repository if it supports this interface. 28 * 29 * @since 1.2.15 30 */ 31 public interface UnrecognizedElementHandler { 32 /** 33 * Called to inform a configured object when 34 * an unrecognized child element is encountered. 35 * @param element element, may not be null. 36 * @param props properties in force, may be null. 37 * @return true if configured object recognized the element 38 * @throws Exception throw an exception to prevent activation 39 * of the configured object. 40 */ 41 boolean parseUnrecognizedElement(Element element, Properties props) throws Exception; 42 }