001/** 002 * Copyright (c) 2004-2011 QOS.ch 003 * All rights reserved. 004 * 005 * Permission is hereby granted, free of charge, to any person obtaining 006 * a copy of this software and associated documentation files (the 007 * "Software"), to deal in the Software without restriction, including 008 * without limitation the rights to use, copy, modify, merge, publish, 009 * distribute, sublicense, and/or sell copies of the Software, and to 010 * permit persons to whom the Software is furnished to do so, subject to 011 * the following conditions: 012 * 013 * The above copyright notice and this permission notice shall be 014 * included in all copies or substantial portions of the Software. 015 * 016 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 017 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 018 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 019 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 020 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 021 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 022 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 023 * 024 */ 025package org.slf4j.impl; 026 027import org.slf4j.ILoggerFactory; 028 029/** 030 * The binding of {@link org.slf4j.LoggerFactory} class with an actual instance of 031 * {@link ILoggerFactory} is performed using information returned by this class. 032 * 033 * This class is meant to provide a dummy StaticLoggerBinder to the slf4j-api module. 034 * Real implementations are found in each SLF4J binding project, e.g. slf4j-nop, 035 * slf4j-log4j12 etc. 036 * 037 * @author Ceki Gülcü 038 */ 039public class StaticLoggerBinder { 040 041 /** 042 * The unique instance of this class. 043 */ 044 private static final StaticLoggerBinder SINGLETON = new StaticLoggerBinder(); 045 046 /** 047 * Return the singleton of this class. 048 * 049 * @return the StaticLoggerBinder singleton 050 */ 051 public static final StaticLoggerBinder getSingleton() { 052 return SINGLETON; 053 } 054 055 /** 056 * Declare the version of the SLF4J API this implementation is compiled against. 057 * The value of this field is modified with each major release. 058 */ 059 // to avoid constant folding by the compiler, this field must *not* be final 060 public static String REQUESTED_API_VERSION = "1.6.99"; // !final 061 062 private StaticLoggerBinder() { 063 throw new UnsupportedOperationException("This code should have never made it into slf4j-api.jar"); 064 } 065 066 public ILoggerFactory getLoggerFactory() { 067 throw new UnsupportedOperationException("This code should never make it into slf4j-api.jar"); 068 } 069 070 public String getLoggerFactoryClassStr() { 071 throw new UnsupportedOperationException("This code should never make it into slf4j-api.jar"); 072 } 073}