/**

  * Copyright 2005-2011 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.kew.lookupable;

 import javax.servlet.jsp.PageContext;

 import org.apache.commons.lang.StringUtils;

 import org.displaytag.decorator.DisplaytagColumnDecorator;

 import org.displaytag.exception.DecoratorException;

 import org.displaytag.properties.MediaTypeEnum;

 import org.kuali.rice.kew.api.KewApiConstants;

 /**

  * A ColumnDecorator for columns in a Lookup which adds an extra non-breaking space if the column

  * is an empty String.

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class LookupColumnDecorator implements DisplaytagColumnDecorator {

         public Object decorate(Object columnValue, PageContext pageContext, MediaTypeEnum media) throws DecoratorException {

                 if (columnValue == null) {

                         return KewApiConstants.HTML_NON_BREAKING_SPACE;

                 }

                 if (columnValue instanceof String && StringUtils.isEmpty(((String)columnValue).trim())) {

                         return KewApiConstants.HTML_NON_BREAKING_SPACE;

                 }

                 return columnValue;

         }

 }