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
18 package org.apache.logging.log4j.core.config.plugins.visitors;
19
20 import org.apache.logging.log4j.core.LogEvent;
21 import org.apache.logging.log4j.core.config.Configuration;
22 import org.apache.logging.log4j.core.config.Node;
23 import org.apache.logging.log4j.core.config.plugins.PluginNode;
24
25 /**
26 * PluginVisitor implementation for {@link PluginNode}
27 */
28 public class PluginNodeVisitor extends AbstractPluginVisitor<PluginNode> {
29 public PluginNodeVisitor() {
30 super(PluginNode.class);
31 }
32
33 @Override
34 public Object visit(final Configuration configuration, final Node node, final LogEvent event,
35 final StringBuilder log) {
36 if (this.conversionType.isInstance(node)) {
37 log.append("Node=").append(node.getName());
38 return node;
39 }
40 LOGGER.warn("Variable annotated with @PluginNode is not compatible with the type {}.", node.getClass());
41 return null;
42 }
43 }