/**
 * ============LICENSE_START====================================================
 * org.onap.aaf
 * ===========================================================================
 * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
 * ===========================================================================
 * Licensed 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.
 * ============LICENSE_END====================================================
 *
 */

package org.onap.aaf.misc.env.impl;

import java.util.logging.Level;
import java.util.logging.Logger;

import org.onap.aaf.misc.env.LogTarget;

/**
 * This LogTarget Implementation is included mostly because the JavaUtil based logging is included in the
 * JDK.  This makes the default implementation independent of any external Jars.
 * 
 *  Log4j is often considered more Enterprise capable.  See Log4JLogTarget for that implementation
 * 
 * @author Jonathan
 *
 */
public class JavaUtilLogTarget implements LogTarget {
    private Level level;
    private Logger log;

    public JavaUtilLogTarget(Logger logger, Level theLevel) {
        log = logger;
        level = theLevel;
    }

    public boolean isLoggable() {
        return log.isLoggable(level);
    }

    public void log(Object ... msgs) {
        if (log.isLoggable(level)) {
            StringBuilder sb = new StringBuilder();
            String msg;
            for (int i=0;i<msgs.length;++i) {
                msg = msgs[i].toString();
                if (msg!=null && msg.length()>0) {
                    int sbl = sb.length();
                    if (sbl>0) {
                        char last = sb.charAt(sbl-1);
                        if (" (.".indexOf(last)<0 && "().".indexOf(msg.charAt(0))<0)sb.append(' ');
                    }
                    sb.append(msg);
                }
            }
            log.log(level, sb.toString());
        }
    }

    public void log(Throwable e, Object ... msgs) {
        String str = e.getLocalizedMessage();
        if (str==null) {
            str = e.getMessage();
        }
        if (str==null) {
            str = e.getClass().getName();
        }
        log.log(level,str,msgs);
    }

    /* (non-Javadoc)
     * @see com.att.inno.env.LogTarget#printf(java.lang.String, java.lang.String[])
     */
    @Override
    public void printf(String fmt, Object ... vars) {
        if (log.isLoggable(level)) {
            log.log(level,String.format(fmt,vars));
        }
    }
}