/**
* Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information regarding copyright ownership. Apereo
* licenses this file to you under the Apache 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 the
* following location:
*
* <p>http://www.apache.org/licenses/LICENSE-2.0
*
* <p>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.apereo.portal.groups;
import org.apereo.portal.spring.locator.PersonAttributeDaoLocator;
import org.jasig.services.persondir.IPersonAttributeDao;
/**
* Factory for creating and obtaining reference to a static singleton <code>PersonDirNameFinder
* </code>.
*
*/
public class PersonDirNameFinderFactory implements IEntityNameFinderFactory {
/**
* Lazily initialized static singleton PersonDirNameFinder backed by the IPersonAttributeDao
* provided by the PersonDirectory static service.
*/
private static PersonDirNameFinder PERSON_DIR_NAME_FINDER_INSTANCE;
/** Do-nothing constructor. */
public PersonDirNameFinderFactory() {
super();
}
/**
* Get the static singleton PersonDirNameFinder instance backed by PersonDirectory.
*
* @return the static singleton PersonDirNameFinder backed by PersonDirectory
*/
public IEntityNameFinder newFinder() {
if (PERSON_DIR_NAME_FINDER_INSTANCE == null) {
PersonDirNameFinderFactory.storeSingleton();
}
return PERSON_DIR_NAME_FINDER_INSTANCE;
}
/**
* Instantiates the static singleton field PERSON_DIR_NAME_FINDER_INSTANCE. Synchronized to
* guarantee singleton-ness of the field.
*/
private static synchronized void storeSingleton() {
// recheck that we need to run because field could have been
// set since we decided to invoke this method but before we acquired
// the lock on this object
if (PERSON_DIR_NAME_FINDER_INSTANCE == null) {
IPersonAttributeDao personAttributeDao =
PersonAttributeDaoLocator.getPersonAttributeDao();
PERSON_DIR_NAME_FINDER_INSTANCE = new PersonDirNameFinder(personAttributeDao);
}
}
}