/*
 * 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.logging.slf4j;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.spi.AbstractLoggerAdapter;
import org.apache.logging.log4j.spi.ExtendedLogger;
import org.apache.logging.log4j.spi.LoggerContext;
import org.apache.logging.log4j.util.ReflectionUtil;
import org.slf4j.ILoggerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 */
public class Log4jLoggerFactory extends AbstractLoggerAdapter<Logger> implements ILoggerFactory {

    private static final String FQCN = Log4jLoggerFactory.class.getName();
    private static final String PACKAGE = "org.slf4j";

    @Override
    protected Logger newLogger(final String name, final LoggerContext context) {
        final String key = Logger.ROOT_LOGGER_NAME.equals(name) ? LogManager.ROOT_LOGGER_NAME : name;
        return new Log4jLogger(context.getLogger(key), name);
    }

    @Override
    protected LoggerContext getContext() {
        return PrivateManager.getContext(ReflectionUtil.getCallerClass(FQCN, PACKAGE).getName());
    }

    /**
     * The real bridge between SLF4J and Log4j.
     */
    private static class PrivateManager extends LogManager {
        private static final String FQCN = LoggerFactory.class.getName();

        public static LoggerContext getContext() {
            return getContext(FQCN, false);
        }

        public static LoggerContext getContext(final String fqcn) {
            return getContext(fqcn, false);
        }

        public static ExtendedLogger getLogger(final String name) {
            return getContext(FQCN).getLogger(name);
        }
    }
}

@@ -936,60 +936,8 @@
 er;%0A
-import org.apache.logging.log4j.spi.ExtendedLogger;%0A
 impo
@@ -1094,33 +1094,55 @@
 Logger;%0A
-import org.slf4j.
+%0A/**%0A * Log4j implementation of SLF4J I
 LoggerFa
@@ -1146,25 +1146,27 @@
 rFactory
-;%0A%0A/**%0A *
+ interface.
 %0A */%0Apub
@@ -1727,41 +1727,32 @@
     
-return PrivateManager.getContext(
+final Class%3C?%3E anchor = 
 Refl
@@ -1795,592 +1795,124 @@
 AGE)
-.getName())
 ;%0A    
-%7D%0A%0A
     
-/**%0A     * The real bridge between SLF4J and Log4j.%0A     */%0A    private static class PrivateManager extends LogManager %7B%0A        private static final String FQCN = LoggerFactory.class.getName();%0A%0A        public static LoggerContext getContext() %7B%0A            return getContext(FQCN, false);%0A        %7D%0A%0A        public static LoggerContext getContext(final String fqcn) %7B%0A            return getContext(fqcn, false);%0A        %7D%0A%0A        public static ExtendedLogger getLogger(final String name) %7B%0A            return getContext(FQCN).getLogger(name
+return anchor == null ? LogManager.getContext() : getContext(ReflectionUtil.getCallerClass(anchor)
 );%0A    
- 
-   %7D%0A    
 %7D
+%0A
 %0A%7D%0A

Simplify log4j-slf4j-impl LoggerAdapter implementation.