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1   /**
2    * Copyright (c) 2004-2011 QOS.ch
3    * All rights reserved.
4    *
5    * Permission is hereby granted, free  of charge, to any person obtaining
6    * a  copy  of this  software  and  associated  documentation files  (the
7    * "Software"), to  deal in  the Software without  restriction, including
8    * without limitation  the rights to  use, copy, modify,  merge, publish,
9    * distribute,  sublicense, and/or sell  copies of  the Software,  and to
10   * permit persons to whom the Software  is furnished to do so, subject to
11   * the following conditions:
12   *
13   * The  above  copyright  notice  and  this permission  notice  shall  be
14   * included in all copies or substantial portions of the Software.
15   *
16   * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
17   * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
18   * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
19   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21   * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
22   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23   *
24   */
25  package org.slf4j;
26  
27  
28  /**
29   * <code>ILoggerFactory</code> instances manufacture {@link Logger}
30   * instances by name.
31   * 
32   * <p>Most users retrieve {@link Logger} instances through the static
33   * {@link LoggerFactory#getLogger(String)} method. An instance of of this
34   * interface is bound internally with {@link LoggerFactory} class at 
35   * compile time. 
36   * 
37   * @author Ceki G&uuml;lc&uuml;
38   */
39  public interface ILoggerFactory {
40    
41    /**
42     * Return an appropriate {@link Logger} instance as specified by the
43     * <code>name</code> parameter.
44     * 
45     * <p>If the name parameter is equal to {@link Logger#ROOT_LOGGER_NAME}, that is 
46     * the string value "ROOT" (case insensitive), then the root logger of the 
47     * underlying logging system is returned.
48     * 
49     * <p>Null-valued name arguments are considered invalid.
50     *
51     * <p>Certain extremely simple logging systems, e.g. NOP, may always
52     * return the same logger instance regardless of the requested name.
53     * 
54     * @param name the name of the Logger to return
55     * @return a Logger instance 
56     */
57    public Logger getLogger(String name);
58  }