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 }