/*
    * 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.jcl;
  
  import java.io.IOException;
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.ConcurrentMap;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogConfigurationException;
  import org.apache.commons.logging.LogFactory;
  import org.apache.logging.log4j.spi.LoggerAdapter;
  
  /**
   * Log4j binding for Commons Logging.
   * {@inheritDoc}
   */
  public class LogFactoryImpl extends LogFactory {
  
      private final LoggerAdapter<Log> adapter = new LogAdapter();
  
      private final ConcurrentMap<String, Object> attributes = new ConcurrentHashMap<String, Object>();
  
      @Override
      public Log getInstance(final String name) throws LogConfigurationException {
          return adapter.getLogger(name);
      }
  
      @Override
      public Object getAttribute(final String name) {
          return attributes.get(name);
      }
  
      @Override
      public String[] getAttributeNames() {
          return attributes.keySet().toArray(new String[attributes.size()]);
      }
  
      @Override
      public Log getInstance(@SuppressWarnings("rawtypes") final Class clazz) throws LogConfigurationException {
          return getInstance(clazz.getName());
      }
  
      /**
       * This method is supposed to clear all loggers. In this implementation it will clear all the logger
       * wrappers but the loggers managed by the underlying logger context will not be.
       */
      @Override
      public void release() {
          try {
              adapter.close();
          } catch (final IOException ignored) {
          }
      }
  
      @Override
      public void removeAttribute(final String name) {
          attributes.remove(name);
      }
  
      @Override
      public void setAttribute(final String name, final Object value) {
          if (value != null) {
              attributes.put(name, value);
          } else {
              removeAttribute(name);
          }
      }
  
  }