org.geotools.util.logging.CommonsLogger.java Source code

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Here is the source code for org.geotools.util.logging.CommonsLogger.java

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/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 * 
 *    (C) 2006-2008, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 */
package org.geotools.util.logging;

import java.util.logging.Level;
import org.apache.commons.logging.Log;

/**
 * An adapter that redirect all Java logging events to the Apache's
 * <A HREF="http://jakarta.apache.org/commons/logging/">Commons-logging</A> framework.
 *
 * @since 2.4
 * @source $URL$
 * @version $Id$
 * @author Martin Desruisseaux
 * @author Saul Farber (MassGIS)
 *
 * @see CommonsLoggerFactory
 * @see Logging
 */
final class CommonsLogger extends LoggerAdapter {
    /**
     * The Apache logger to use.
     */
    final Log logger;

    /**
     * Creates a new logger.
     *
     * @param name   The logger name.
     * @param logger The result of {@code LogFactory.getLog(name)}.
     */
    public CommonsLogger(final String name, final Log logger) {
        super(name);
        this.logger = logger;
    }

    /**
     * Do nothing since Commons-Logging doesn't support programmatic change of logging level.
     */
    public void setLevel(Level level) {
    }

    /**
     * Returns the level for this logger.
     */
    public Level getLevel() {
        if (logger.isTraceEnabled())
            return Level.FINEST;
        if (logger.isDebugEnabled())
            return Level.FINE;
        if (logger.isInfoEnabled())
            return Level.CONFIG;
        if (logger.isWarnEnabled())
            return Level.WARNING;
        if (logger.isErrorEnabled())
            return Level.SEVERE;
        if (logger.isFatalEnabled())
            return Level.SEVERE;
        return Level.OFF;
    }

    /**
     * Returns {@code true} if the specified level is loggable.
     */
    @SuppressWarnings("fallthrough")
    public boolean isLoggable(final Level level) {
        final int n = level.intValue();
        switch (n / 100) {
        default: {
            switch (n) { // Special cases (should not occur often).
            case Integer.MIN_VALUE:
                return true; // ALL
            case Integer.MAX_VALUE:
                return false; // OFF
            default:
                return n >= 0 && logger.isFatalEnabled();
            }
        }
        case 10:
            return logger.isErrorEnabled(); // SEVERE
        case 9:
            return logger.isWarnEnabled(); // WARNING
        case 8: // INFO
        case 7:
            return logger.isInfoEnabled(); // CONFIG
        case 6: // (not allocated)
        case 5:
            return logger.isDebugEnabled(); // FINE
        case 4: // FINER
        case 3: // FINEST
        case 2: // (not allocated)
        case 1: // (not allocated)
        case 0:
            return logger.isTraceEnabled(); // ALL
        }
    }

    /**
     * Logs a record at the specified level.
     */
    @Override
    @SuppressWarnings("fallthrough")
    public void log(final Level level, final String message, final Throwable thrown) {
        final int n = level.intValue();
        switch (n / 100) {
        default: {
            // MAX_VALUE is a special value for Level.OFF. Otherwise and
            // if positive, log to fatal since we are greater than SEVERE.
            if (n != Integer.MAX_VALUE || n >= 0) {
                logger.fatal(message, thrown);
            }
            break;
        }
        case 10:
            logger.error(message, thrown);
            break; // SEVERE
        case 9:
            logger.warn(message, thrown);
            break; // WARNING
        case 8: // INFO
        case 7:
            logger.info(message, thrown);
            break; // CONFIG
        case 6: // (not allocated)
        case 5:
            logger.debug(message, thrown);
            break; // FINE
        case 4: // FINER
        case 3: // FINEST
        case 2: // (not allocated)
        case 1: // (not allocated)
        case 0:
            logger.trace(message, thrown);
            break; // ALL
        }
    }

    public void severe(String message) {
        logger.error(message);
    }

    public void warning(String message) {
        logger.warn(message);
    }

    public void info(String message) {
        logger.info(message);
    }

    public void config(String message) {
        logger.info(message);
    }

    public void fine(String message) {
        logger.debug(message);
    }

    public void finer(String message) {
        logger.debug(message);
    }

    public void finest(String message) {
        logger.trace(message);
    }
}