001    /**
002     * Copyright 2005-2012 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     */
016    package org.kuali.rice.kim.api.identity;
017    
018    import org.apache.commons.collections.CollectionUtils;
019    import org.kuali.rice.core.api.mo.common.Defaultable;
020    import org.kuali.rice.core.api.mo.common.active.Inactivatable;
021    
022    import java.util.Collection;
023    
024    public class EntityUtils {
025    
026        private EntityUtils() {
027            throw new UnsupportedOperationException("do not call.");
028        }
029    
030        public static <T extends Defaultable & Inactivatable> T getDefaultItem( Collection<T> collection ) {
031                    // find the default entry
032            if (CollectionUtils.isEmpty(collection)) {
033                return null;
034            }
035                    for ( T item : collection ) {
036                            if ( item.isDefaultValue() && item.isActive() ) {
037                                    return (T)item;
038                            }
039                    }
040                    // if no default, return the first
041                    for ( T item : collection ) {
042                        return item;
043                    }
044                    // if neither, return null
045                    return null;
046            }
047    }