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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.apache.log4j.spi;

import org.apache.log4j.Appender;
import java.util.Enumeration;

/**
   Interface for attaching appenders to objects.

   @author Ceki Gülcü
   @since 0.9.1 */
public interface AppenderAttachable {
  
  /**
     Add an appender.
   */
  public
  void addAppender(Appender newAppender);

  /**
     Get all previously added appenders as an Enumeration.  */
  public
  Enumeration getAllAppenders();

  /**
     Get an appender by name.
   */
  public
  Appender getAppender(String name);

  
  /**
     Returns true if the specified appender is in list of
     attached attached, false otherwise.

     @since 1.2 */
  public 
  boolean isAttached(Appender appender);

  /**
     Remove all previously added appenders.
  */
  void removeAllAppenders();


  /**
     Remove the appender passed as parameter from the list of appenders.
  */
   void removeAppender(Appender appender);


 /**
    Remove the appender with the name passed as parameter from the
    list of appenders.  
  */
 void
 removeAppender(String name);   
}