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 */
017
018package org.apache.logging.log4j.core.config.plugins.visitors;
019
020import org.apache.logging.log4j.core.LogEvent;
021import org.apache.logging.log4j.core.LoggerContext;
022import org.apache.logging.log4j.core.config.Configuration;
023import org.apache.logging.log4j.core.config.Node;
024import org.apache.logging.log4j.core.config.plugins.PluginConfiguration;
025
026/**
027 * PluginVisitor implementation for {@link PluginConfiguration}.
028 */
029public class PluginLoggerContextVisitor extends AbstractPluginVisitor<PluginConfiguration> {
030    public PluginLoggerContextVisitor() {
031        super(PluginConfiguration.class);
032    }
033
034    @Override
035    public Object visit(final Configuration configuration, final Node node, final LogEvent event,
036                        final StringBuilder log) {
037        if (this.conversionType.isAssignableFrom(LoggerContext.class)) {
038            if (configuration.getLoggerContext() != null) {
039                return configuration.getLoggerContext();
040            } else {
041                LOGGER.warn("Configuration {} is not assigned a LoggerContext", configuration.getName());
042            }
043        }
044        LOGGER.warn("Variable annotated with @PluginLoggerContext does not reference a LoggerContext");
045        return null;
046    }
047}