content: /*
   * 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 jakarta.persistence.EntityManager;
  import jakarta.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;
    }
  }
  
  