StaticLoggerBinder.java

/*
 * 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.slf4j.impl;

import org.slf4j.ILoggerFactory;
import org.slf4j.LoggerFactory;
import org.slf4j.spi.LoggerFactoryBinder;

/**
 * The binding of {@link LoggerFactory} class with an actual instance of
 * {@link ILoggerFactory} is performed using information returned by this class.
 */
public class StaticLoggerBinder implements LoggerFactoryBinder {

  /**
   * The unique instance of this class.
   * 
   */
  private static final StaticLoggerBinder SINGLETON = new StaticLoggerBinder();
  
  /**
   * Return the singleton of this class.
   * 
   * @return the StaticLoggerBinder singleton
   */
  public static final StaticLoggerBinder getSingleton() {
    return SINGLETON;
  }

  
  /**
   * Declare the version of the SLF4J API this implementation is compiled
   * against. The value of this field is usually modified with each release.
   */
  // to avoid constant folding by the compiler, this field must *not* be final
  public static String REQUESTED_API_VERSION = "1.6";  // !final
  
  private static final String loggerFactoryClassStr = SimpleLoggerFactory.class.getName();

  /**
   * The ILoggerFactory instance returned by the {@link #getLoggerFactory}
   * method should always be the same object
   */
  private final ILoggerFactory loggerFactory;
  
  private StaticLoggerBinder() {
    loggerFactory = new SimpleLoggerFactory();
  }
  
  public ILoggerFactory getLoggerFactory() {
    return loggerFactory;
  }
  
  public String getLoggerFactoryClassStr() {
    return loggerFactoryClassStr;
  }   
}