[Jakarta-velocity Wiki] Update of "LogChuteCommonsLog" by NathanBubna

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The following page has been changed by NathanBubna:
http://wiki.apache.org/jakarta-velocity/LogChuteCommonsLog

New page:
This is a replacement of the LogSystemCommonsLog that is part of VelocityTools 1.1 and 1.2.  It will be added to the trunk of VelocityTools after version 1.2 is released.  This is dependent on Velocity 1.5 and provides additional logging facilities to match improvements in that version.

{{{
/*
 * Copyright 2005 The Apache Software Foundation.
 *
 * 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.apache.velocity.tools.generic.log;

import org.apache.velocity.app.Velocity;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.runtime.log.Log;
import org.apache.velocity.runtime.log.LogChute;

/**
 * Redirects commons-logging messages to Velocity's configured LogChute.
 *
 * <p>To use, specify this class in your commons-logging.properties:
 * <code>
 * org.apache.commons.logging.Log=org.apache.velocity.tools.log.LogChuteCommonsLog
 * </code>
 * </p>
 * @since VelocityTools 1.3
 * @version $Id: LogChuteCommonsLog.java 72115 2004-11-11 07:00:54Z nbubna $
 */
public class LogChuteCommonsLog implements org.apache.commons.logging.Log
{

    protected static Log target = null;

    /**
     * Set a VelocityEngine to handle all the log messages.
     */
    public static void setVelocityLog(Log target)
    {
        this.target = target;
    }


    // ********************  begin non-static stuff *******************

    private String name;

    public LogChuteCommonsLog() 
    {
        this("");
    }

    public LogChuteCommonsLog(String name) 
    {
        if (name == null)
        {
            throw new NullPointerException("Log name cannot be null");
        }
    }
    
    protected Log getTarget()
    {
        if (target == null)
        {
            return Velocity.getLog();
        }
        else
        {
            return target;
        }
    }


    /*************** Commons Log Interface ****************/

    /**
     * Passes messages to Velocity's LogChute at "DEBUG" level.
     * (it's the lowest available. sorry.)
     */
    public void trace(Object message)
    {
        getTarget().trace(message);
    }

    /**
     * Passes messages to Velocity's LogChute at "DEBUG" level.
     * (it's the lowest available. sorry.)
     */
    public void trace(Object message, Throwable t)
    {
        getTarget().trace(message, t);
    }

    /**
     * Passes messages to Velocity's LogChute at "DEBUG" level.
     */
    public void debug(Object message)
    {
        getTarget().debug(message);
    }

    /**
     * Passes messages to Velocity's LogChute at "DEBUG" level.
     */
    public void debug(Object message, Throwable t)
    {
        getTarget().debug(message, t);
    }

    /**
     * Passes messages to Velocity's LogChute at "INFO" level.
     */
    public void info(Object message)
    {
        getTarget().info(message);
    }

    /**
     * Passes messages to Velocity's LogChute at "INFO" level.
     */
    public void info(Object message, Throwable t)
    {
        getTarget().inf(message, t);
    }

    /**
     * Passes messages to Velocity's LogChute at "WARN" level.
     */
    public void warn(Object message)
    {
        getTarget().warn(message);
    }

    /**
     * Passes messages to Velocity's LogChute at "WARN" level.
     */
    public void warn(Object message, Throwable t)
    {
        getTarget().warn(message, t);
    }

    /**
     * Passes messages to Velocity's LogChute at "ERROR" level.
     */
    public void error(Object message)
    {
        getTarget().error(message);
    }

    /**
     * Passes messages to Velocity's LogChute at "ERROR" level.
     */
    public void error(Object message, Throwable t)
    {
        getTarget().error(message, t);
    }

    /**
     * Passes messages to Velocity's LogChute at "ERROR" level.
     * (it's the highest available. sorry.)
     */
    public void fatal(Object message)
    {
        getTarget().error(message);
    }

    /**
     * Passes messages to Velocity's LogChute at "ERROR" level.
     * (it's the highest available. sorry.)
     */
    public void fatal(Object message, Throwable t)
    {
        getTarget().error(message, t);
    }

    /** 
     * Returns true if Velocity's LogChute returns true 
     * for isTraceEnabled().
     */
    public boolean isTraceEnabled()
    {
        getTarget().isTraceEnabled();
    }

    /** 
     * Returns true if Velocity's LogChute returns true 
     * for isDebugEnabled().
     */
    public boolean isDebugEnabled()
    {
        getTarget().isDebugEnabled();
    }

    /** 
     * Returns true if Velocity's LogChute returns true 
     * for isInfoEnabled().
     */
    public boolean isInfoEnabled()
    {
        getTarget().isInfoEnabled();
    }

    /** 
     * Returns true if Velocity's LogChute returns true 
     * for isWarnEnabled().
     */
    public boolean isWarnEnabled()
    {
        getTarget().isWarnEnabled();
    }

    /** 
     * Returns true if Velocity's LogChute returns true 
     * for isErrorEnabled().
     */
    public boolean isErrorEnabled()
    {
        getTarget().isErrorEnabled();
    }

    /** 
     * Returns true if isErrorEnabled() returns true, since
     * Velocity's LogChute doesn't support this level.
     */
    public boolean isFatalEnabled()
    {
        return isErrorEnabled();
    }

}
}}}

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