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}