package ca.uhn.fhir.jpa.delete;

/*-
 * #%L
 * HAPI FHIR JPA Server
 * %%
 * Copyright (C) 2014 - 2021 Smile CDR, Inc.
 * %%
 * Licensed 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.
 * #L%
 */

import ca.uhn.fhir.jpa.model.entity.ResourceLink;
import ca.uhn.fhir.jpa.model.entity.ResourceTable;
import org.springframework.stereotype.Service;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceContextType;
import javax.persistence.TypedQuery;
import java.util.List;

@Service
public class DeleteConflictFinderService {
	@PersistenceContext(type = PersistenceContextType.TRANSACTION)
	protected EntityManager myEntityManager;

	List<ResourceLink> findConflicts(ResourceTable theEntity, int maxResults) {
		TypedQuery<ResourceLink> query = myEntityManager.createQuery("SELECT l FROM ResourceLink l WHERE l.myTargetResourcePid = :target_pid", ResourceLink.class);
		query.setParameter("target_pid", theEntity.getId());
		query.setMaxResults(maxResults);
		return query.getResultList();
	}
}
