/*

  * Copyright 2006-2007 The Kuali Foundation

  * 

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  * 

  * 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.kuali.rice.core.web.format;

 import java.text.ParseException;

 import java.util.Date;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.api.datetime.DateTimeService;

 import org.kuali.rice.core.api.CoreConstants;

 import org.kuali.rice.core.api.resourceloader.GlobalResourceLoader;

 import org.kuali.rice.core.util.RiceKeyConstants;

 /**

  * This class is used to format timestamp objects.

  */

 public class TimestampAMPMFormatter extends Formatter {

     private static final long serialVersionUID = 7612442662886603084L;

     private transient DateTimeService dateTimeService;

     /**

      * Unformats its argument and return a java.util.Date instance initialized with the resulting string.

      * 

      * @return a java.util.Date intialized with the provided string

      */

     public Object convertToObject(String target) {

         try {

                 return getDateTimeService().convertToSqlTimestamp(target);

         }

         catch (ParseException e) {

             throw new FormatException("parsing", RiceKeyConstants.ERROR_DATE_TIME, target, e);

         }

     }

     /**

      * Returns a string representation of its argument, formatted as a date with the "MM/dd/yyyy h:mm a" format.

      * 

      * @return a formatted String

      */

     public Object format(Object value) {

         if (value == null) {

             return null;

         }

         if (value instanceof String && StringUtils.isEmpty((String) value)) {

             return null;

         }

         return getDateTimeService().toDateTimeString((Date)value);

     }

     protected DateTimeService getDateTimeService() {

             if (this.dateTimeService == null) {

                     this.dateTimeService = GlobalResourceLoader.getService(CoreConstants.Services.DATETIME_SERVICE);

             }

             return this.dateTimeService;

     }

 }