net.naijatek.myalumni.util.date.DateConverter.java Source code

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Here is the source code for net.naijatek.myalumni.util.date.DateConverter.java

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/*
 * ====================================================================
 * Copyright (C) 1997-2008 by Naijatek.com
 *
 * All copyright notices regarding MyAlumni MUST remain 
 * intact in the scripts and in the outputted HTML.
 * The "powered by" text/logo with a link back to
 * http://www.naijatek.com in 
 * the footer of the pages MUST remain visible when the pages
 * are viewed on the internet or intranet.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Support can be obtained from support forums at:
 * http://www.naijatek.com/myalumni/forum
 *
 * Correspondence and Marketing Questions can be sent to:
 * info at naijatek com
 *
 * <p>Title: MyAlumni </p>
 * <p>Description: This system helps keep alive the line of communications between alumni/alumnus</p>
 * <p>Copyright: Copyright (c) 1997-2008</p>
 * <p>Company: Naijatek Solutions (http://www.naijatek.com)</p>
 * @author Folashade Adeyosoye (shardayyy@naijatek.com)
 * @version 1.0
 */
package net.naijatek.myalumni.util.date;

import java.sql.Timestamp;

import java.text.DateFormat;
import java.text.SimpleDateFormat;

import java.util.Date;

import org.apache.commons.beanutils.ConversionException;
import org.apache.commons.beanutils.Converter;
import org.apache.commons.lang.StringUtils;

/**
 * This class is converts a java.util.Date to a String
 * and a String to a java.util.Date.
 *
 * <p>
 * <a href="DateConverter.java.html"><i>View Source</i></a>
 * </p>
 *
 * @author <a href="mailto:matt@raibledesigns.com">Matt Raible</a>
 */
public class DateConverter implements Converter {

    //public static final String TS_FORMAT = DateConverterUtil.getDatePattern() + " HH:mm:ss.S";

    public Object convert(Class type, Object value) {
        if (value == null) {
            return null;
        } else if (type == Timestamp.class) {
            return convertToDate(type, value, DateConverterUtil.getDateTimePattern());
        } else if (type == Date.class) {
            return convertToDate(type, value, DateConverterUtil.getDatePattern());
        } else if (type == String.class) {
            return convertToString(type, value);
        }

        throw new ConversionException("Could not convert " + value.getClass().getName() + " to " + type.getName());
    }

    protected Object convertToDate(Class type, Object value, String pattern) {
        DateFormat df = new SimpleDateFormat(pattern);
        if (value instanceof String) {
            try {
                if (StringUtils.isEmpty(value.toString())) {
                    return null;
                }

                Date date = df.parse((String) value);
                if (type.equals(Timestamp.class)) {
                    return new Timestamp(date.getTime());
                }
                return date;
            } catch (Exception pe) {
                pe.printStackTrace();
                throw new ConversionException("Error converting String to Date");
            }
        }

        throw new ConversionException("Could not convert " + value.getClass().getName() + " to " + type.getName());
    }

    protected Object convertToString(Class type, Object value) {

        if (value instanceof Date) {
            DateFormat df = new SimpleDateFormat(DateConverterUtil.getDatePattern());
            if (value instanceof Timestamp) {
                df = new SimpleDateFormat(DateConverterUtil.getDateTimePattern());
            }

            try {
                return df.format(value);
            } catch (Exception e) {
                e.printStackTrace();
                throw new ConversionException("Error converting Date to String");
            }
        } else {
            return value.toString();
        }
    }
}