/*

  * Copyright 2007 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 1.0 (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/ecl1.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.krad.app.persistence.jpa;

 import org.reflections.Reflections;

 import javax.persistence.Embeddable;

 import javax.persistence.Entity;

 import javax.persistence.MappedSuperclass;

 import java.util.HashSet;

 import java.util.List;

 import java.util.Set;

 /**

  * Abstract class which exposes as JPA managed classes all of the business objects in a given package 

  * 

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

  *

  */

 public abstract class PackagePersistableBusinessObjectClassExposer implements

                 PersistableBusinessObjectClassExposer {

         /**

          * Exposes all of the JPA annotated entities in the package given by the getPackageNameToExpose method

          * to be managed by the PersistenceUnit calling this

          * 

          * @see PersistableBusinessObjectClassExposer#exposePersistableBusinessObjectClassNames()

          */

         @Override

         public Set<String> exposePersistableBusinessObjectClassNames() {

                 Set<String> exposedClassNames = new HashSet<String>();

                 for (String packageNameToExpose: getPackageNamesToExpose()) {

                         Reflections reflections = new Reflections(packageNameToExpose);

                         final Set<Class<?>> entities = reflections.getTypesAnnotatedWith(Entity.class);

                         for (Class<?> entityClass : entities) {

                                 exposedClassNames.add(entityClass.getName());

                         }

                         final Set<Class<?>> mappedSuperclasses = reflections.getTypesAnnotatedWith(MappedSuperclass.class);

                         for (Class<?> mappedSuperclassClass : mappedSuperclasses) {

                                 exposedClassNames.add(mappedSuperclassClass.getName());

                         }

                         final Set<Class<?>> embeddables = reflections.getTypesAnnotatedWith(Embeddable.class);

                         for (Class<?> embeddableClass : embeddables) {

                                 // may this loop never be entered

                                 exposedClassNames.add(embeddableClass.getName());

                         }

                 }

                 return exposedClassNames;

         }

         /**

          * @return the name of the package to expose all JPA annotated entities in

          */

         public abstract List<String> getPackageNamesToExpose();

 }