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.Arrays;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  
  import jakarta.persistence.EntityManager;
  import jakarta.persistence.NoResultException;
  import jakarta.persistence.TypedQuery;
  
  import org.apache.ambari.server.orm.RequiresSession;
  import org.apache.ambari.server.orm.entities.MemberEntity;
  import org.apache.ambari.server.orm.entities.UserEntity;
  
  import com.google.inject.Inject;
  import com.google.inject.Provider;
  import com.google.inject.Singleton;
  import com.google.inject.persist.Transactional;
  
  @Singleton
  public class MemberDAO {
    @Inject
    Provider<EntityManager> entityManagerProvider;
    @Inject
    DaoUtils daoUtils;
  
    @RequiresSession
    public MemberEntity findByPK(Integer memberPK) {
      return entityManagerProvider.get().find(MemberEntity.class, memberPK);
    }
  
    @RequiresSession
    public MemberEntity findByUserAndGroup(String userName, String groupName) {
      final TypedQuery<MemberEntity> query = entityManagerProvider.get().createNamedQuery("memberByUserAndGroup", MemberEntity.class);
      query.setParameter("username", userName.toLowerCase());
      query.setParameter("groupname", groupName.toLowerCase());
      try {
        return query.getSingleResult();
      } catch (NoResultException e) {
        return null;
      }
    }
  
    @RequiresSession
    public List<MemberEntity> findAll() {
      final TypedQuery<MemberEntity> query = entityManagerProvider.get().createQuery("SELECT m FROM MemberEntity m", MemberEntity.class);
      return daoUtils.selectList(query);
    }
  
    @RequiresSession
    public List<MemberEntity> findAllMembersByUser(UserEntity userEntity) {
      TypedQuery<MemberEntity> query = entityManagerProvider.get().createQuery("SELECT m FROM MemberEntity m WHERE m.user = :userEntity", MemberEntity.class);
      query.setParameter("userEntity", userEntity);
      return daoUtils.selectList(query);
    }
  
    @Transactional
    public void create(MemberEntity member) {
      create(new HashSet<>(Arrays.asList(member)));
    }
  
    @Transactional
    public void create(Set<MemberEntity> members) {
      for (MemberEntity member: members) {
        entityManagerProvider.get().persist(member);
      }
    }
  
    @Transactional
    public MemberEntity merge(MemberEntity member) {
      return entityManagerProvider.get().merge(member);
    }
  
    @Transactional
    public void remove(MemberEntity member) {
      entityManagerProvider.get().remove(merge(member));
    }
  
    @Transactional
    public void remove(Set<MemberEntity> members) {
      for (MemberEntity member: members) {
        entityManagerProvider.get().remove(entityManagerProvider.get().merge(member));
      }
    }
  
    @Transactional
    public void removeByPK(Integer memberPK) {
      remove(findByPK(memberPK));
    }
  }
  