/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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
*
* 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.apache.ambari.server.orm.dao;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.TypedQuery;
import org.apache.ambari.server.orm.RequiresSession;
import org.apache.ambari.server.orm.entities.PrincipalTypeEntity;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import com.google.inject.persist.Transactional;
/**
* Principal Type Data Access Object.
*/
@Singleton
public class PrincipalTypeDAO {
/**
* JPA entity manager
*/
@Inject
Provider<EntityManager> entityManagerProvider;
/**
* Utilities.
*/
@Inject
DaoUtils daoUtils;
/**
* Find a principal type with the given id.
*
* @param id type id
*
* @return a matching principal type or null
*/
@RequiresSession
public PrincipalTypeEntity findById(Integer id) {
return entityManagerProvider.get().find(PrincipalTypeEntity.class, id);
}
/**
* Find a principal type entity with the given name.
*
* @param name principal type name
*
* @return a matching principal type entity or null
*/
@RequiresSession
public PrincipalTypeEntity findByName(String name) {
TypedQuery<PrincipalTypeEntity> query = entityManagerProvider.get().createNamedQuery("PrincipalTypeEntity.findByName", PrincipalTypeEntity.class);
query.setParameter("name", name);
return daoUtils.selectSingle(query);
}
/**
* Find all principal types.
*
* @return all principal types or an empty List
*/
@RequiresSession
public List<PrincipalTypeEntity> findAll() {
TypedQuery<PrincipalTypeEntity> query = entityManagerProvider.get().createQuery("SELECT principalType FROM PrincipalTypeEntity principalType", PrincipalTypeEntity.class);
return daoUtils.selectList(query);
}
/**
* Make an instance managed and persistent.
*
* @param entity entity to store
*/
@Transactional
public void create(PrincipalTypeEntity entity) {
entityManagerProvider.get().persist(entity);
}
@Transactional
public PrincipalTypeEntity merge(PrincipalTypeEntity entity) {
return entityManagerProvider.get().merge(entity);
}
/**
* Remove the entity instance.
*
* @param entity entity to remove
*/
@Transactional
public void remove(PrincipalTypeEntity entity) {
entityManagerProvider.get().remove(entity);
}
/**
* Creates and returns principal type if it wasn't persisted yet.
*
* @param principalType id of principal type
* @return principal type
*/
@RequiresSession
public PrincipalTypeEntity ensurePrincipalTypeCreated(int principalType) {
PrincipalTypeEntity principalTypeEntity = findById(principalType);
if (principalTypeEntity == null) {
principalTypeEntity = new PrincipalTypeEntity();
principalTypeEntity.setId(principalType);
switch (principalType) {
case PrincipalTypeEntity.USER_PRINCIPAL_TYPE:
principalTypeEntity.setName(PrincipalTypeEntity.USER_PRINCIPAL_TYPE_NAME);
break;
case PrincipalTypeEntity.GROUP_PRINCIPAL_TYPE:
principalTypeEntity.setName(PrincipalTypeEntity.GROUP_PRINCIPAL_TYPE_NAME);
break;
case PrincipalTypeEntity.ROLE_PRINCIPAL_TYPE:
principalTypeEntity.setName(PrincipalTypeEntity.ROLE_PRINCIPAL_TYPE_NAME);
break;
default:
throw new IllegalArgumentException("Unknown principal type ID=" + principalType);
}
create(principalTypeEntity);
}
return principalTypeEntity;
}
}