nulllogger.java

Office格式转换代码

/*
 * ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache POI" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache POI", nor may "Apache" appear in their name, without
 *    prior written permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.poi.util;

import java.util.*;

/**
 * A logger class that strives to make it as easy as possible for
 * developers to write log calls, while simultaneously making those
 * calls as cheap as possible by performing lazy evaluation of the log
 * message.<p>
 *
 * @author Marc Johnson (mjohnson at apache dot org)
 * @author Glen Stampoultzis (glens at apache.org)
 * @author Nicola Ken Barozzi (nicolaken at apache.org)
 */

public class NullLogger extends POILogger
{
    public void initialize(final String cat)
    {
       //do nothing    
    }
    
    /**
     * Log a message
     *
     * @param level One of DEBUG, INFO, WARN, ERROR, FATAL
     * @param obj1 The object to log.
     */

    public void log(final int level, final Object obj1)
    {
        //do nothing
    }

    /**
     * Check if a logger is enabled to log at the specified level
     *
     * @param level One of DEBUG, INFO, WARN, ERROR, FATAL
     * @param obj1 The logger to check.
     */

    public boolean check(final int level)
    {
       return false;
    }

    /**
     * Log a message. Lazily appends Object parameters together.
     *
     * @param level One of DEBUG, INFO, WARN, ERROR, FATAL
     * @param obj1 first object to place in the message
     * @param obj2 second object to place in the message
     */

    public void log(final int level, final Object obj1, final Object obj2)
    {
       //do nothing
    }

    /**
     * Log a message. Lazily appends Object parameters together.
     *
     * @param level One of DEBUG, INFO, WARN, ERROR, FATAL
     * @param obj1 first Object to place in the message
     * @param obj2 second Object to place in the message
     * @param obj3 third Object to place in the message
     */

    public void log(final int level, final Object obj1, final Object obj2,
                    final Object obj3)
    {
       //do nothing
    }

    /**
     * Log a message. Lazily appends Object parameters together.
     *
     * @param level One of DEBUG, INFO, WARN, ERROR, FATAL
     * @param obj1 first Object to place in the message
     * @param obj2 second Object to place in the message
     * @param obj3 third Object to place in the message
     * @param obj4 fourth Object to place in the message
     */

    public void log(final int level, final Object obj1, final Object obj2,
                    final Object obj3, final Object obj4)
    {
       //do nothing
    }

    /**
     * Log a message. Lazily appends Object parameters together.
     *
     * @param level One of DEBUG, INFO, WARN, ERROR, FATAL
     * @param obj1 first Object to place in the message
     * @param obj2 second Object to place in the message
     * @param obj3 third Object to place in the message
     * @param obj4 fourth Object to place in the message
     * @param obj5 fifth Object to place in the message
     */

    public void log(final int level, final Object obj1, final Object obj2,
                    final Object obj3, final Object obj4, final Object obj5)
    {
       //do nothing
    }

    /**
     * Log a message. Lazily appends Object parameters together.
     *
     * @param level One of DEBUG, INFO, WARN, ERROR, FATAL
     * @param obj1 first Object to place in the message
     * @param obj2 second Object to place in the message
     * @param obj3 third Object to place in the message
     * @param obj4 fourth Object to place in the message
     * @param obj5 fifth Object to place in the message
     * @param obj6 sixth Object to place in the message
     */

    public void log(final int level, final Object obj1, final Object obj2,
                    final Object obj3, final Object obj4, final Object obj5,
                    final Object obj6)
    {
       //do nothing
    }

    /**
     * Log a message. Lazily appends Object parameters together.
     *
     * @param level One of DEBUG, INFO, WARN, ERROR, FATAL
     * @param obj1 first Object to place in the message
     * @param obj2 second Object to place in the message
     * @param obj3 third Object to place in the message
     * @param obj4 fourth Object to place in the message
     * @param obj5 fifth Object to place in the message
     * @param obj6 sixth Object to place in the message
     * @param obj7 seventh Object to place in the message
     */

    public void log(final int level, final Object obj1, final Object obj2,
                    final Object obj3, final Object obj4, final Object obj5,
                    final Object obj6, final Object obj7)
    {
       //do nothing
    }

    /**
     * Log a message. Lazily appends Object parameters together.
     *
     * @param level One of DEBUG, INFO, WARN, ERROR, FATAL
     * @param obj1 first Object to place in the message
     * @param obj2 second Object to place in the message
     * @param obj3 third Object to place in the message
     * @param obj4 fourth Object to place in the message
     * @param obj5 fifth Object to place in the message
     * @param obj6 sixth Object to place in the message
     * @param obj7 seventh Object to place in the message
     * @param obj8 eighth Object to place in the message
     */

    public void log(final int level, final Object obj1, final Object obj2,
                    final Object obj3, final Object obj4, final Object obj5,
                    final Object obj6, final Object obj7, final Object obj8)
    {
       //do nothing
    }

    /**
     * Log a message
     *
     * @param level One of DEBUG, INFO, WARN, ERROR, FATAL
     * @param obj1 The object to log.  This is converted to a string.
     * @param exception An exception to be logged
     */

    public void log(final int level, final Object obj1,
                    final Throwable exception)
    {
       //do nothing
    }

    /**
     * Log a message. Lazily appends Object parameters together.
     *
     * @param level One of DEBUG, INFO, WARN, ERROR, FATAL
     * @param obj1 first Object to place in the message
     * @param obj2 second Object to place in the message
     * @param exception An exception to be logged
     */

    public void log(final int level, final Object obj1, final Object obj2,
                    final Throwable exception)
    {
       //do nothing
    }

    /**