/*
* Copyright 2002-2013 the original author or authors.
*
* Licensed 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.activejpa.examples.petclinic.util;
import java.util.Collection;
import org.activejpa.examples.petclinic.model.BaseEntity;
import org.springframework.orm.ObjectRetrievalFailureException;
/**
* Utility methods for handling entities. Separate from the BaseEntity class mainly because of dependency on the
* ORM-associated ObjectRetrievalFailureException.
*
* @author Juergen Hoeller
* @author Sam Brannen
* @see org.activejpa.examples.petclinic.model.BaseEntity
* @since 29.10.2003
*/
public abstract class EntityUtils {
/**
* Look up the entity of the given class with the given id in the given collection.
*
* @param entities the collection to search
* @param entityClass the entity class to look up
* @param entityId the entity id to look up
* @return the found entity
* @throws ObjectRetrievalFailureException
* if the entity was not found
*/
public static <T extends BaseEntity> T getById(Collection<T> entities, Class<T> entityClass, int entityId)
throws ObjectRetrievalFailureException {
for (T entity : entities) {
if (entity.getId().intValue() == entityId && entityClass.isInstance(entity)) {
return entity;
}
}
throw new ObjectRetrievalFailureException(entityClass, entityId);
}
}