package org.slf4j.helpers;
   
   import org.slf4j.ILoggerFactory;
   import org.slf4j.IMarkerFactory;
   import org.slf4j.spi.MDCAdapter;
   import org.slf4j.spi.SLF4JServiceProvider;
   
   public class NOPServiceProvider implements SLF4JServiceProvider {
   
      /**
       * Declare the version of the SLF4J API this implementation is compiled
       * against. The value of this field is modified with each major release.
       */
      // to avoid constant folding by the compiler, this field must *not* be final
      public static String REQUESTED_API_VERSION = "1.8.99"; // !final
  
      private ILoggerFactory loggerFactory = new NOPLoggerFactory();
      private IMarkerFactory markerFactory = new BasicMarkerFactory();
      private MDCAdapter mdcAdapter = new NOPMDCAdapter();
  
      public ILoggerFactory getLoggerFactory() {
          return loggerFactory;
      }
  
      public IMarkerFactory getMarkerFactory() {
          return markerFactory;
      }
  
      public MDCAdapter getMDCAdapter() {
          return mdcAdapter;
      }
  
      public String getRequesteApiVersion() {
          return REQUESTED_API_VERSION;
      }
  
      @Override
      public void initialize() {
          // already initialized
      }
  }