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The Pax Logging API Library is to allow for the Pax Logging Service to be reloaded without stopping the many dependent bundles. It also contains the OSGi Log Service API and the Knopflerfish Log API.

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/*
 * 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;
  }
}