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  /* 
   * Copyright (c) 2004-2008 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;
 
Markers are named objects used to enrich log statements. Conforming logging system Implementations of SLF4J determine how information conveyed by markers are used, if at all. In particular, many conforming logging systems ignore marker data.

Markers can contain references to other markers, which in turn may contain references of their own.

Author(s):
Ceki Gülcü
 
 public interface Marker extends Serializable {

  
This constant represents any marker, including a null marker.
 
   public final String ANY_MARKER = "*";

  
This constant represents any non-null marker.
 
   public final String ANY_NON_NULL_MARKER = "+";

  
Get the name of this Marker.

Returns:
name of marker
 
   public String getName();

  
Add a reference to another Marker.

Parameters:
reference a reference to another marker
Throws:
java.lang.IllegalArgumentException if 'reference' is null
 
   public void add(Marker reference);

  
Remove a marker reference.

Parameters:
reference the marker reference to remove
Returns:
true if reference could be found and removed, false otherwise.
 
   public boolean remove(Marker reference);

  

Deprecated:
Replaced by hasReferences().
 
   public boolean hasChildren();
  
  
Does this marker have any references?

Returns:
true if this marker has one or more references, false otherwise.
 
   public boolean hasReferences();
  
  
Returns an Iterator which can be used to iterate over the references of this marker. An empty iterator is returned when this marker has no references.

Returns:
Iterator over the references of this marker
 
   public Iterator iterator();

  
Does this marker contain a reference to the 'other' marker? Marker A is defined to contain marker B, if A == B or if B is referenced by A, or if B is referenced by any one of A's references (recursively).

Parameters:
other The marker to test for inclusion.
Returns:
Whether this marker contains the other marker.
Throws:
java.lang.IllegalArgumentException if 'other' is null
  public boolean contains(Marker other);

  
Does this marker contain the marker named 'name'? If 'name' is null the returned value is always false.

Parameters:
other The marker to test for inclusion.
Returns:
Whether this marker contains the other marker.
  public boolean contains(String name);

  
Markers are considered equal if they have the same name.

Parameters:
o
Returns:
true, if this.name equals o.name
Since:
1.5.1
  public boolean equals(Object o);

  
Compute the hash code based on the name of this marker. Note that markers are considered equal if they have the same name.

Returns:
the computed hashCode
Since:
1.5.1
  public int hashCode();
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