simplelogger.java

Excel Report是一款基于Excel的报表生成工具

/*********************************************************************
 *
 *      Copyright (C) 2003 Andrew Khan
 *
 * 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; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 ***************************************************************************/

package net.excel.report;

/**
 * The default logger. Simple writes everything out to stdout or stderr
 */
public class SimpleLogger extends Logger {
    /* (non-Javadoc)
     * @see excel.report.Logger#isDebugEnable()
     */
    public boolean isDebugEnable() {
        return true;
    }
    /* (non-Javadoc)
     * @see excel.report.Logger#isInfoEnable()
     */
    public boolean isInfoEnable() {
        return true;
    }
    /**
     * Flag to indicate whether or not warnings should be suppressed
     */
    private boolean suppressWarnings;

    /**
     * Constructor
     */
    public SimpleLogger() {
        suppressWarnings = false;
    }

    /**
     * Log a debug message
     */
    public void debug(Object message) {
        if (!suppressWarnings) {
            System.out.print("Debug: ");
            System.out.println(message);
        }
    }

    /**
     * Log a debug message and exception
     */
    public void debug(Object message, Throwable t) {
        if (!suppressWarnings) {
            System.out.print("Debug: ");
            System.out.println(message);
            t.printStackTrace();
        }
    }

    /**
     * Log an error message
     */
    public void error(Object message) {
        System.err.print("Error: ");
        System.err.println(message);
    }

    /**
     * Log an error message object and exception
     */
    public void error(Object message, Throwable t) {
        System.err.print("Error: ");
        System.err.println(message);
        t.printStackTrace();
    }

    /**
     * Log a fatal message
     */
    public void fatal(Object message) {
        System.err.print("Fatal: ");
        System.err.println(message);
    }

    /**
     * Log a fatal message and exception
     */
    public void fatal(Object message, Throwable t) {
        System.err.print("Fatal:  ");
        System.err.println(message);
        t.printStackTrace();
    }

    /**
     * Log an information message
     */
    public void info(Object message) {
        if (!suppressWarnings) {
            System.out.println(message);
        }
    }

    /**
     * Logs an information message and an exception
     */

    public void info(Object message, Throwable t) {
        if (!suppressWarnings) {
            System.out.println(message);
            t.printStackTrace();
        }
    }

    /**
     * Log a warning message object
     */
    public void warn(Object message) {
        if (!suppressWarnings) {
            System.err.print("Warning:  ");
            System.err.println(message);
        }
    }

    /**
     * Log a warning message with exception
     */
    public void warn(Object message, Throwable t) {
        if (!suppressWarnings) {
            System.err.print("Warning:  ");
            System.err.println(message);
            t.printStackTrace();
        }
    }

    /**
     * Accessor to the logger implementation
     */
    protected Logger getLoggerImpl(Class c) {
        return this;
    }

    /**
     * Overrides the method in the base class to suppress warnings - it can be
     * set using the system property jxl.nowarnings. This method was originally
     * present in the WorkbookSettings bean, but has been moved to the logger
     * class. This means it is now present when the JVM is initialized, and
     * subsequent to change it on a Workbook by Workbook basis will prove
     * fruitless
     * 
     * @param w
     *            suppression flag
     */
    public void setSuppressWarnings(boolean w) {
        suppressWarnings = w;
    }
}