DateHandler.java

/**
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (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.mozilla.org/MPL/ 
* 
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations under
* the License.
* 
* The Original Code is OpenELIS code.
* 
* Copyright (C) The Minnesota Department of Health.  All Rights Reserved.
*/
package us.mn.state.health.lims.reports.send.common.handler;
import java.sql.Date;
import java.text.ParseException;
import java.text.SimpleDateFormat;

import org.exolab.castor.mapping.GeneralizedFieldHandler;

import us.mn.state.health.lims.common.log.LogEvent;

/**
 * The FieldHandler for the Date class
 *
 */
public class DateHandler
    extends GeneralizedFieldHandler
{

    private static final String FORMAT = "yyyy-MM-dd";

    /**
     * Creates a new MyDateHandler instance
     */
    public DateHandler() {
        super();
    }

    /**
     * This method is used to convert the value when the
     * getValue method is called. The getValue method will
     * obtain the actual field value from given 'parent' object.
     * This convert method is then invoked with the field's
     * value. The value returned from this method will be
     * the actual value returned by getValue method.
     *
     * @param value the object value to convert after
     *  performing a get operation
     * @return the converted value.
     */
    public Object convertUponGet(Object value) {
        if (value == null) return null;
        SimpleDateFormat formatter = new SimpleDateFormat(FORMAT);
        Date date = (Date)value;
        return formatter.format(date);
    }


    /**
     * This method is used to convert the value when the
     * setValue method is called. The setValue method will
     * call this method to obtain the converted value.
     * The converted value will then be used as the value to
     * set for the field.
     *
     * @param value the object value to convert before
     *  performing a set operation
     * @return the converted value.
     */
    public Object convertUponSet(Object value) {
        SimpleDateFormat formatter = new SimpleDateFormat(FORMAT);
        Date date = null;
        try {
            //date = formatter.parse((String)value);
            date = new java.sql.Date(formatter.parse((String)value).getTime());

        }
        catch(ParseException px) {
            //bugzilla 2154
			LogEvent.logError("DateHandler","convertUponSet()",px.toString());
            throw new IllegalArgumentException(px.getMessage());
        }
        return date;
     }

    /**
     * Returns the class type for the field that this
     * GeneralizedFieldHandler converts to and from. This
     * should be the type that is used in the
     * object model.
     *
     * @return the class type of of the field
     */
    public Class getFieldType() {
        return Date.class;
    }

    /**
     * Creates a new instance of the object described by
     * this field.
     *
     * @param parent The object for which the field is created
     * @return A new instance of the field's value
     * @throws IllegalStateException This field is a simple
     *  type and cannot be instantiated
     */
    public Object newInstance( Object parent )
        throws IllegalStateException
    {
        //-- Since it's marked as a string...just return null,
        //-- it's not needed.
        return null;
    }

}