JAL-3026 srcjar files for VARNA and log4j

[jalview.git] / srcjar / org / apache / log4j / xml / UnrecognizedElementHandler.java

diff --git a/srcjar/org/apache/log4j/xml/UnrecognizedElementHandler.java b/srcjar/org/apache/log4j/xml/UnrecognizedElementHandler.java
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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.xml;
+
+import org.w3c.dom.Element;
+import java.util.Properties;
+
+/**
+ * When implemented by an object configured by DOMConfigurator,
+ * the handle method will be called when an unrecognized child
+ * element is encountered.  Unrecognized child elements of
+ * the log4j:configuration element will be dispatched to
+ * the logger repository if it supports this interface.
+ *
+ * @since 1.2.15
+ */
+public interface UnrecognizedElementHandler {
+    /**
+     * Called to inform a configured object when
+     * an unrecognized child element is encountered.
+     * @param element element, may not be null.
+     * @param props properties in force, may be null.
+     * @return true if configured object recognized the element
+     * @throws Exception throw an exception to prevent activation
+     * of the configured object.
+     */
+    boolean parseUnrecognizedElement(Element element, Properties props) throws Exception;
+}
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