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.ResourceTypeEntity;
  
  import com.google.inject.Inject;
  import com.google.inject.Provider;
  import com.google.inject.Singleton;
  import com.google.inject.persist.Transactional;
  
  /**
   * Resource Type Data Access Object.
   */
  @Singleton
  public class ResourceTypeDAO {
    /**
     * JPA entity manager
     */
    @Inject
    Provider<EntityManager> entityManagerProvider;
    @Inject
    DaoUtils daoUtils;
  
    /**
     * Find a resource type with the given id.
     *
     * @param id  type id
     *
     * @return  a matching resource type or null
     */
    @RequiresSession
    public ResourceTypeEntity findById(Integer id) {
      return entityManagerProvider.get().find(ResourceTypeEntity.class, id);
    }
  
    /**
     * Find a resource type with the given name.
     *
     * @param name  type name
     *
     * @return  a matching resource type or null
     */
    @RequiresSession
    public ResourceTypeEntity findByName(String name) {
      TypedQuery<ResourceTypeEntity> query = entityManagerProvider.get().createQuery(
          "SELECT resourceType FROM ResourceTypeEntity resourceType WHERE resourceType.name = ?1",
          ResourceTypeEntity.class);
      return daoUtils.selectSingle(query, name);
    }
  
    /**
     * Find all resource types.
     *
     * @return all resource types or an empty List
     */
    @RequiresSession
    public List<ResourceTypeEntity> findAll() {
      TypedQuery<ResourceTypeEntity> query = entityManagerProvider.get().createQuery("SELECT resourceType FROM ResourceTypeEntity resourceType", ResourceTypeEntity.class);
      return daoUtils.selectList(query);
    }
  
    /**
     * Make an instance managed and persistent.
     *
     * @param entity  entity to store
     */
    @Transactional
    public void create(ResourceTypeEntity entity) {
      entityManagerProvider.get().persist(entity);
    }
  
    /**
     * Merge the given entity.
     *
     * @param entity  the entity
     *
     * @return the managed entity
     */
    @Transactional
    public ResourceTypeEntity merge(ResourceTypeEntity entity) {
      return entityManagerProvider.get().merge(entity);
    }
  
  }
  
  