au.id.jericho.lib.html.LoggerFactory.java Source code

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Here is the source code for au.id.jericho.lib.html.LoggerFactory.java

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// Jericho HTML Parser - Java based library for analysing and manipulating HTML
// Version 2.6
// Copyright (C) 2007 Martin Jericho
// http://jerichohtml.sourceforge.net/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of either one of the following licences:
//
// 1. The Eclipse Public License (EPL) version 1.0,
// included in this distribution in the file licence-epl-1.0.html
// or available at http://www.eclipse.org/legal/epl-v10.html
//
// 2. The GNU Lesser General Public License (LGPL) version 2.1 or later,
// included in this distribution in the file licence-lgpl-2.1.txt
// or available at http://www.gnu.org/licenses/lgpl.txt
//
// This library is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the individual licence texts for more details.

package au.id.jericho.lib.html;

final class LoggerFactory {
    private static LoggerProvider defaultLoggerProvider = null;

    public static Logger getLogger(final String name) {
        return getLoggerProvider().getLogger(name);
    }

    public static Logger getLogger(final Class loggedClass) {
        return getLogger(loggedClass.getName());
    }

    public static LoggerProvider getLoggerProvider() {
        return (Config.LoggerProvider != null) ? Config.LoggerProvider : getDefaultLoggerProvider();
    }

    private static LoggerProvider getDefaultLoggerProvider() {
        if (defaultLoggerProvider == null)
            defaultLoggerProvider = determineDefaultLoggerProvider();
        return defaultLoggerProvider;
    }

    private static LoggerProvider determineDefaultLoggerProvider() {
        if (isClassAvailable("org.slf4j.impl.StaticLoggerBinder")) {
            if (isClassAvailable("org.slf4j.impl.JDK14LoggerFactory"))
                return LoggerProvider.JAVA;
            //if (isClassAvailable("org.slf4j.impl.Log4jLoggerFactory")) return LoggerProvider.LOG4J;
            //if (!isClassAvailable("org.slf4j.impl.JCLLoggerFactory")) return LoggerProvider.SLF4J;
            // fall through to next check if SLF4J is configured to use JCL
        }
        //      if (isClassAvailable("org.apache.commons.logging.Log")) {
        //         final String logClassName=org.apache.commons.logging.LogFactory.getLog("test").getClass().getName();
        //         if (logClassName.equals("org.apache.commons.logging.impl.Jdk14Logger")) return LoggerProvider.JAVA;
        //         if (logClassName.equals("org.apache.commons.logging.impl.Log4JLogger")) return LoggerProvider.LOG4J;
        //         return LoggerProvider.JCL;
        //      }
        //if (isClassAvailable("org.apache.log4j.Logger")) return LoggerProvider.LOG4J;
        return LoggerProvider.JAVA;
    }

    private static boolean isClassAvailable(final String className) {
        try {
            Class.forName(className);
            return true;
        } catch (Throwable t) {
            return false;
        }
    }
}