StaticLoggerBinder.java

/*
 * Copyright (c) 2004-2011 QOS.ch
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package org.slf4j.impl;

import org.ops4j.pax.logging.slf4j.Slf4jLoggerFactory;
import org.slf4j.ILoggerFactory;

/**
 * The binding of {@link org.apache.log4j.spi.LoggerFactory} class with an actual instance of
 * {@link ILoggerFactory} is performed using information returned by this class.
 *
 * @author Ceki Gülcü
 */
public class StaticLoggerBinder {

  /**
   * The unique instance of this class.
   */
  public static final StaticLoggerBinder SINGLETON = new StaticLoggerBinder();

  private static final String loggerFactoryClassStr = Slf4jLoggerFactory.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 Slf4jLoggerFactory();
  }

  /**
   * 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 = "1.6.99";  // !final

  /**
   * Return the singleton of this class.
   *
   * @return the StaticLoggerBinder singleton
   */
  public static final StaticLoggerBinder getSingleton() {
    return SINGLETON;
  }

  public ILoggerFactory getLoggerFactory() {
    return loggerFactory;
  }

  public String getLoggerFactoryClassStr() {
    return loggerFactoryClassStr;
  }
}