/*
    * Copyright 2009 Red Hat, Inc.
    *
    * Red Hat 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.jboss.netty.logging;
  
  import org.osgi.service.log.LogService;
  
  /**
   * <a href="http://www.osgi.org/">OSGi</a> {@link LogService} logger.
   *
   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
   *
   * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
   *
   */
  class OsgiLogger extends AbstractInternalLogger {
  
      private final OsgiLoggerFactory parent;
      private final InternalLogger fallback;
      private final String name;
      private final String prefix;
  
      OsgiLogger(OsgiLoggerFactory parent, String name, InternalLogger fallback) {
          this.parent = parent;
          this.name = name;
          this.fallback = fallback;
          prefix = "[" + name + "] ";
      }
  
      public void debug(String msg) {
          LogService logService = parent.getLogService();
          if (logService != null) {
              logService.log(LogService.LOG_DEBUG, prefix + msg);
          } else {
              fallback.debug(msg);
          }
      }
  
      public void debug(String msg, Throwable cause) {
          LogService logService = parent.getLogService();
          if (logService != null) {
              logService.log(LogService.LOG_DEBUG, prefix + msg, cause);
          } else {
              fallback.debug(msg, cause);
          }
      }
  
      public void error(String msg) {
          LogService logService = parent.getLogService();
          if (logService != null) {
              logService.log(LogService.LOG_ERROR, prefix + msg);
          } else {
              fallback.error(msg);
          }
      }
  
      public void error(String msg, Throwable cause) {
          LogService logService = parent.getLogService();
          if (logService != null) {
              logService.log(LogService.LOG_ERROR, prefix + msg, cause);
          } else {
              fallback.error(msg, cause);
          }
      }
  
      public void info(String msg) {
          LogService logService = parent.getLogService();
          if (logService != null) {
              logService.log(LogService.LOG_INFO, prefix + msg);
          } else {
              fallback.info(msg);
          }
      }
  
      public void info(String msg, Throwable cause) {
          LogService logService = parent.getLogService();
          if (logService != null) {
              logService.log(LogService.LOG_INFO, prefix + msg, cause);
          } else {
              fallback.info(msg, cause);
          }
      }
  
      public boolean isDebugEnabled() {
          return true;
      }
 
     public boolean isErrorEnabled() {
         return true;
     }
 
     public boolean isInfoEnabled() {
         return true;
     }
 
     public boolean isWarnEnabled() {
         return true;
     }
 
     public void warn(String msg) {
         LogService logService = parent.getLogService();
         if (logService != null) {
             logService.log(LogService.LOG_WARNING, prefix + msg);
         } else {
             fallback.warn(msg);
         }
     }
 
     public void warn(String msg, Throwable cause) {
         LogService logService = parent.getLogService();
         if (logService != null) {
             logService.log(LogService.LOG_WARNING, prefix + msg, cause);
         } else {
             fallback.warn(msg, cause);
         }
     }
 
     @Override
     public String toString() {
         return name;
     }
 }