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.ArrayList;
  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.PermissionEntity;
  import org.apache.ambari.server.orm.entities.PrincipalEntity;
  import org.apache.ambari.server.orm.entities.PrivilegeEntity;
  import org.apache.ambari.server.orm.entities.ResourceEntity;
  import org.apache.ambari.server.orm.helpers.SQLConstants;
  import org.apache.ambari.server.orm.helpers.SQLOperations;
  
  import com.google.common.collect.Lists;
  import com.google.inject.Inject;
  import com.google.inject.Provider;
  import com.google.inject.Singleton;
  import com.google.inject.persist.Transactional;
  
  /**
   * Privilege Data Access Object.
   */
  @Singleton
  public class PrivilegeDAO {
    /**
     * JPA entity manager
     */
    @Inject
    Provider<EntityManager> entityManagerProvider;
    @Inject
    DaoUtils daoUtils;
  
    /**
     * Find a privilege with the given id.
     *
     * @param id type id
     *
     * @return a matching privilege or null
     */
    @RequiresSession
    public PrivilegeEntity findById(Integer id) {
      return entityManagerProvider.get().find(PrivilegeEntity.class, id);
    }
  
    /**
     * Find all privileges.
     *
     * @return all privileges or an empty List
     */
    @RequiresSession
    public List<PrivilegeEntity> findAll() {
      TypedQuery<PrivilegeEntity> query = entityManagerProvider.get().createQuery("SELECT privilege FROM PrivilegeEntity privilege", PrivilegeEntity.class);
      return daoUtils.selectList(query);
    }
  
    /**
     * Find all privileges for given resource.
     *
     * @param id ID of the resource
     * @return all resource privileges or an empty list
     */
    @RequiresSession
    public List<PrivilegeEntity> findByResourceId(Long id) {
      TypedQuery<PrivilegeEntity> query = entityManagerProvider.get().createQuery("SELECT privilege FROM PrivilegeEntity privilege WHERE privilege.resource.id = :resource_id", PrivilegeEntity.class);
      query.setParameter("resource_id", id);
      return daoUtils.selectList(query);
    }
  
    /**
     * Determine whether or not the given privilege entity exists.
     *
     * @param entity  the privilege entity
     *
     * @return true if the given privilege entity already exists
     */
    public boolean exists(PrivilegeEntity entity) {
      return exists(entity.getPrincipal(), entity.getResource(), entity.getPermission());
    }
  
    /**
     * Determine whether or not the privilege entity exists defined by the given principal, resource and
     * permission exists.
     *
     * @param principalEntity   the principal entity
     * @param resourceEntity    the resource entity
     * @param permissionEntity  the permission entity
     *
     * @return true if the privilege entity already exists
     */
    @RequiresSession
    public boolean exists(PrincipalEntity principalEntity, ResourceEntity resourceEntity, PermissionEntity permissionEntity) {
      TypedQuery<PrivilegeEntity> query = entityManagerProvider.get().createQuery(
          "SELECT privilege FROM PrivilegeEntity privilege WHERE privilege.principal = :principal AND privilege.resource = :resource AND privilege.permission = :permission", PrivilegeEntity.class);
  
      query.setParameter("principal", principalEntity);
      query.setParameter("resource", resourceEntity);
      query.setParameter("permission", permissionEntity);
  
      List<PrivilegeEntity> privilegeEntities = daoUtils.selectList(query);
      return !(privilegeEntities == null || privilegeEntities.isEmpty());
    }
  
    /**
     * Find the privileges entities for the given list of principals
     *
     * @param principalList  the list of principal entities
     *
     * @return the list of privileges matching the query
     */
    @RequiresSession
    public List<PrivilegeEntity> findAllByPrincipal(List<PrincipalEntity> principalList) {
      TypedQuery<PrivilegeEntity> query = entityManagerProvider.get().createQuery(
          "SELECT privilege FROM PrivilegeEntity privilege WHERE privilege.principal IN :principalList", PrivilegeEntity.class);
  
      List<PrivilegeEntity> result = new ArrayList<>();
      SQLOperations.batch(principalList, SQLConstants.IN_ARGUMENT_MAX_SIZE, (chunk, currentBatch, totalBatches, totalSize) -> {
        query.setParameter("principalList", chunk);
        result.addAll(daoUtils.selectList(query));
        return 0;
      });
  
      return Lists.newArrayList(result);
    }
  
    /**
     * Make an instance managed and persistent.
     *
     * @param entity  entity to persist
     */
    @Transactional
    public void create(PrivilegeEntity entity) {
      entityManagerProvider.get().persist(entity);
    }
  
    /**
     * Merge the state of the given entity into the current persistence context.
     *
     * @param entity  entity to merge
     *
     * @return the merged entity
     */
    @Transactional
    public PrivilegeEntity merge(PrivilegeEntity entity) {
      return entityManagerProvider.get().merge(entity);
    }
    /**
     * Remove the entity instance.
     *
     * @param entity  entity to remove
     */
    @Transactional
    public void remove(PrivilegeEntity entity) {
      entityManagerProvider.get().remove(merge(entity));
    }
  
    /**
     * Detach an instance from manager.
     *
     * @param entity  entity to detach
     */
    @Transactional
    public void detach(PrivilegeEntity entity) {
      entityManagerProvider.get().detach(entity);
    }
  }
  