/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF 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.apache.isis.tool.mavenplugin.util;

import java.util.Enumeration;

public final class Log4j {
    
    private Log4j(){}

    public static void configureIfRequired() {
        if(isConfigured()) return;
        org.apache.log4j.BasicConfigurator.configure();
        org.apache.log4j.LogManager.getRootLogger().setLevel(org.apache.log4j.Level.INFO);
    }
    
    private static boolean isConfigured() {
        Enumeration<?> appenders = org.apache.log4j.LogManager.getRootLogger().getAllAppenders();
        if (appenders.hasMoreElements()) {
            return true;
        } 
        Enumeration<?> loggers = org.apache.log4j.LogManager.getCurrentLoggers();
        while (loggers.hasMoreElements()) {
            org.apache.log4j.Logger c = (org.apache.log4j.Logger) loggers.nextElement();
            if (c.getAllAppenders().hasMoreElements())
                return true;
        }
        return false;
    }


}
