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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.impl;
     26 
     27 import org.slf4j.ILoggerFactory;
     28 import org.slf4j.LoggerFactory;
     29 import org.slf4j.spi.LoggerFactoryBinder;
     30 
     31 /**
     32  * The binding of {@link LoggerFactory} class with an actual instance of
     33  * {@link ILoggerFactory} is performed using information returned by this class.
     34  *
     35  * @author Ceki Gülcü
     36  */
     37 public class StaticLoggerBinder implements LoggerFactoryBinder {
     38 
     39     /**
     40      * The unique instance of this class.
     41      *
     42      */
     43     private static final StaticLoggerBinder SINGLETON = new StaticLoggerBinder();
     44 
     45     /**
     46      * Return the singleton of this class.
     47      *
     48      * @return the StaticLoggerBinder singleton
     49      */
     50     public static final StaticLoggerBinder getSingleton() {
     51         return SINGLETON;
     52     }
     53 
     54     /**
     55      * Declare the version of the SLF4J API this implementation is compiled against.
     56      * The value of this field is usually modified with each release.
     57      */
     58     // to avoid constant folding by the compiler, this field must *not* be final
     59     public static String REQUESTED_API_VERSION = "1.6.99"; // !final
     60 
     61     private static final String loggerFactoryClassStr = org.slf4j.impl.JDK14LoggerFactory.class.getName();
     62 
     63     /** The ILoggerFactory instance returned by the {@link #getLoggerFactory} method
     64      * should always be the same object
     65      */
     66     private final ILoggerFactory loggerFactory;
     67 
     68     private StaticLoggerBinder() {
     69         // Note: JCL gets substituted at build time by an appropriate Ant task
     70         loggerFactory = new org.slf4j.impl.JDK14LoggerFactory();
     71     }
     72 
     73     public ILoggerFactory getLoggerFactory() {
     74         return loggerFactory;
     75     }
     76 
     77     public String getLoggerFactoryClassStr() {
     78         return loggerFactoryClassStr;
     79     }
     80 }
     81