/*
 * 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.log4j.core.config;

import java.lang.ref.WeakReference;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.plugins.di.spi.InstancePostProcessor;
import org.apache.logging.log4j.plugins.di.spi.ResolvableKey;

public class LoggerContextAwarePostProcessor implements InstancePostProcessor {
    private final WeakReference<LoggerContext> loggerContextRef;

    public LoggerContextAwarePostProcessor(final LoggerContext loggerContext) {
        loggerContextRef = new WeakReference<>(loggerContext);
    }

    @Override
    public <T> T postProcessBeforeInitialization(final ResolvableKey<T> resolvableKey, final T instance) {
        if (instance instanceof LoggerContextAware) {
            final LoggerContext loggerContext = loggerContextRef.get();
            ((LoggerContextAware) instance).setLoggerContext(loggerContext);
        }
        return instance;
    }
}
