    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 G&uuml;lc&uuml;
    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}