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package org.slf4j.impl;

import org.slf4j.ILoggerFactory;
import org.slf4j.spi.LoggerFactoryBinder;
/**
 * The binding of {@link EquinoxLoggerFactory} class with an actual instance of
 * {@link ILoggerFactory} is performed using information returned by this class.
 *
 * @author Philippe Marschall
 */
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 = "1.7"; // !final

  private static final String loggerFactoryClassStr = EquinoxLoggerFactory.class.getName();

  /**
   * The ILoggerFactory instance returned by the {@link #getLoggerFactory}
   * method should always be the same object
   */
  private final ILoggerFactory loggerFactory;

  private StaticLoggerBinder() {
    this.loggerFactory = new EquinoxLoggerFactory();
  }

  @Override
  public ILoggerFactory getLoggerFactory() {
    return this.loggerFactory;
  }

  @Override
  public String getLoggerFactoryClassStr() {
    return loggerFactoryClassStr;
  }

}