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.BlueprintEntity;
  import org.apache.ambari.server.orm.entities.StackEntity;
  
  import com.google.inject.Inject;
  import com.google.inject.Provider;
  import com.google.inject.Singleton;
  import com.google.inject.persist.Transactional;
  
  
  /**
   * Blueprint Data Access Object.
   */
  @Singleton
  public class BlueprintDAO {
  
    /**
     * JPA entity manager
     */
    @Inject
    Provider<EntityManager> entityManagerProvider;
  
    @Inject
    StackDAO stackDAO;
  
    /**
     * Find a blueprint with a given name.
     *
     * @param blueprint_name name of blueprint to find
     *
     * @return  a matching blueprint or null
     */
    @RequiresSession
    public BlueprintEntity findByName(String blueprint_name) {
      return entityManagerProvider.get().find(BlueprintEntity.class, blueprint_name);
    }
  
    /**
     * Find all blueprints.
     *
     * @return all blueprints or an empty List
     */
    @RequiresSession
    public List<BlueprintEntity> findAll() {
      TypedQuery<BlueprintEntity> query = entityManagerProvider.get().
          createNamedQuery("allBlueprints", BlueprintEntity.class);
  
      return query.getResultList();
    }
  
    /**
     * Refresh the state of the instance from the database,
     * overwriting changes made to the entity, if any.
     *
     * @param blueprintEntity  entity to refresh
     */
    @Transactional
    public void refresh(BlueprintEntity blueprintEntity) {
      ensureStackIdSet(blueprintEntity);
      entityManagerProvider.get().refresh(blueprintEntity);
    }
  
    /**
     * Make an instance managed and persistent.
     *
     * @param blueprintEntity  entity to persist
     */
    @Transactional
    public void create(BlueprintEntity blueprintEntity) {
      ensureStackIdSet(blueprintEntity);
      entityManagerProvider.get().persist(blueprintEntity);
    }
  
    /**
     * Merge the state of the given entity into the current persistence context.
     *
     * @param blueprintEntity  entity to merge
     * @return the merged entity
     */
    @Transactional
    public BlueprintEntity merge(BlueprintEntity blueprintEntity) {
      ensureStackIdSet(blueprintEntity);
      return entityManagerProvider.get().merge(blueprintEntity);
    }
  
    /**
     * Remove the entity instance.
     *
     * @param blueprintEntity  entity to remove
     */
    @Transactional
    public void remove(BlueprintEntity blueprintEntity) {
      ensureStackIdSet(blueprintEntity);
      entityManagerProvider.get().remove(merge(blueprintEntity));
    }
  
    /**
     * Remove entity instance by primary key
     * @param blueprint_name Primary key: blueprint name
     */
    @Transactional
    public void removeByName(String blueprint_name) {
      entityManagerProvider.get().remove(findByName(blueprint_name));
    }
  
    private void ensureStackIdSet(BlueprintEntity entity) {
      StackEntity stack = entity.getStack();
      if (stack != null && stack.getStackId() == null) {
        entity.setStack(stackDAO.find(stack.getStackName(), stack.getStackVersion()));
      }
    }
  }
  