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/*
 *  Copyright 2004-2006 Stefan Reuter
 *
 *  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.
 *
 */

package org.asteriskjava.util.internal;

import org.asteriskjava.util.Log;

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

/**
 * Implementation of {@link Log} that maps to the Logger of the
 * java.util.logging package.
 * 
 * Kindly donated by Sun's Steve Drach.
 *
 * @author drach
 */
public class JavaLoggingLog implements Log {
    /**
     * The underlying commons-logging Log object to use.
     */
    private final Logger log; // NOPMD by srt on 7/5/06 11:18 PM

    /**
     * Creates a new JavaLoggingLog obtained from java.util.logging for the
     * given class.
     *
     * @param clazz the class to log for.
     */
    public JavaLoggingLog(Class clazz) {
        log = Logger.getLogger(clazz.getName());
    }

    public void debug(Object obj) {
        StackTraceElement ste = getInvokerSTE();

        if (ste != null) {
            log.logp(Level.FINE, ste.getClassName(), ste.getMethodName(), obj.toString());
        } else {
            log.fine(obj.toString());
        }
    }

    public void info(Object obj) {
        StackTraceElement ste = getInvokerSTE();

        if (ste != null) {
            log.logp(Level.INFO, ste.getClassName(), ste.getMethodName(), obj.toString());
        } else {
            log.info(obj.toString());
        }
    }

    public void warn(Object obj) {
        StackTraceElement ste = getInvokerSTE();

        if (ste != null) {
            log.logp(Level.WARNING, ste.getClassName(), ste.getMethodName(), obj.toString());
        } else {
            log.warning(obj.toString());
        }
    }

    public void warn(Object obj, Throwable ex) {
        StackTraceElement ste = getInvokerSTE();

        if (ste != null) {
            log.logp(Level.WARNING, ste.getClassName(), ste.getMethodName(), obj.toString(), ex);
        } else {
            log.log(Level.WARNING, obj.toString(), ex);
        }
    }

    public void error(Object obj) {
        StackTraceElement ste = getInvokerSTE();

        if (ste != null) {
            log.logp(Level.SEVERE, ste.getClassName(), ste.getMethodName(), obj.toString());
        } else {
            log.severe(obj.toString());
        }
    }

    public void error(Object obj, Throwable ex) {
        StackTraceElement ste = getInvokerSTE();

        if (ste != null) {
            log.logp(Level.SEVERE, ste.getClassName(), ste.getMethodName(), obj.toString(), ex);
        } else {
            log.log(Level.SEVERE, obj.toString(), ex);
        }
    }

    private StackTraceElement getInvokerSTE() {
        StackTraceElement[] stack = (new Throwable()).getStackTrace();

        if (stack.length > 2) {
            return stack[2];
        }

        return null;
    }

    @Override
    public boolean isDebugEnabled() {
        return log.isLoggable(Level.FINE);
    }

    @Override
    public void debug(Object e, Throwable e2) {
        StackTraceElement ste = getInvokerSTE();

        if (ste != null) {
            log.logp(Level.FINE, ste.getClassName(), ste.getMethodName(), e.toString(), e2);
        } else {
            log.log(Level.FINE, e.toString(), e2);
        }
    }

}