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/*
 * Copyright 2010-2013 Ning, Inc.
 * Copyright 2014 Groupon, Inc
 * Copyright 2014 The Billing Project, LLC
 *
 * The Billing Project licenses this file to you under the Apache License, version 2.0
 * (the "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at:
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package org.slf4j.impl;

import org.osgi.service.log.LogService;
import org.slf4j.ILoggerFactory;
import org.slf4j.spi.LoggerFactoryBinder;

public class StaticLoggerBinder implements LoggerFactoryBinder {

    /**
     * The unique instance of this class.
     */
    private static final StaticLoggerBinder SINGLETON = new StaticLoggerBinder();

    /**
     * Return the singleton of this class.
     *
     * @return the StaticLoggerBinder singleton
     */
    public static StaticLoggerBinder getSingleton() {
        return SINGLETON;
    }

    /**
     * Declare the version of the SLF4J API this implementation is compiled
     * against. The value of this field is usually modified with each release.
     */
    // to avoid constant folding by the compiler, this field must *not* be final
    public static String REQUESTED_API_VERSION = "1.7.2"; // !final

    private static final String loggerFactoryClassStr = OSGISlf4jLoggerFactory.class.getName();

    /**
     * The ILoggerFactory instance returned by the {@link #getLoggerFactory}
     * method should always be the same object
     */
    private final OSGISlf4jLoggerFactory loggerFactory;

    private StaticLoggerBinder() {
        loggerFactory = new OSGISlf4jLoggerFactory();
    }

    public ILoggerFactory getLoggerFactory() {
        return loggerFactory;
    }

    public String getLoggerFactoryClassStr() {
        return loggerFactoryClassStr;
    }

    public void setLogService(final LogService logService) {
        loggerFactory.setDelegate(logService);
    }
}