001/**
002 * Copyright 2005-2016 The Kuali Foundation
003 *
004 * Licensed under the Educational Community License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.opensource.org/licenses/ecl2.php
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.kuali.rice.kew.lookupable;
017
018import javax.servlet.jsp.PageContext;
019
020import org.apache.commons.lang.StringUtils;
021import org.displaytag.decorator.DisplaytagColumnDecorator;
022import org.displaytag.exception.DecoratorException;
023import org.displaytag.properties.MediaTypeEnum;
024import org.kuali.rice.kew.api.KewApiConstants;
025
026
027/**
028 * A ColumnDecorator for columns in a Lookup which adds an extra non-breaking space if the column
029 * is an empty String.
030 *
031 * @author Kuali Rice Team (rice.collab@kuali.org)
032 */
033public class LookupColumnDecorator implements DisplaytagColumnDecorator {
034
035        public Object decorate(Object columnValue, PageContext pageContext, MediaTypeEnum media) throws DecoratorException {
036                if (columnValue == null) {
037                        return KewApiConstants.HTML_NON_BREAKING_SPACE;
038                }
039                if (columnValue instanceof String && StringUtils.isEmpty(((String)columnValue).trim())) {
040                        return KewApiConstants.HTML_NON_BREAKING_SPACE;
041                }
042                return columnValue;
043        }
044
045}