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82 lines
2.0 KiB
Java
82 lines
2.0 KiB
Java
/**
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*
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*/
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package org.gcube.portlets.user.performfishanalytics.server.database;
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import java.util.List;
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import javax.persistence.EntityManager;
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import javax.persistence.EntityManagerFactory;
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import javax.persistence.criteria.CriteriaBuilder;
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import javax.persistence.criteria.CriteriaQuery;
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import javax.persistence.criteria.Root;
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import org.gcube.portlets.user.performfishanalytics.shared.exceptions.DatabaseServiceException;
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/**
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* The Interface JavaPersistenceHandler.
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*
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* @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
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* Jan 11, 2019
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* @param <T> the generic type
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*/
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public interface JavaPersistenceHandler<T> {
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/**
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* Gets the criteria builder.
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*
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* @return the criteria builder
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* @throws DatabaseServiceException the database service exception
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*/
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public CriteriaBuilder getCriteriaBuilder() throws DatabaseServiceException;
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/**
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* Gets the entity manager factory.
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*
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* @return the entity manager factory
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*/
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public EntityManagerFactory getEntityManagerFactory();
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/**
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* Creates the new manager.
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*
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* @return the entity manager
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* @throws DatabaseServiceException the database service exception
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*/
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public EntityManager createNewManager() throws DatabaseServiceException;
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/**
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* Execute criteria query.
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*
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* @param criteriaQuery the criteria query
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* @return the list
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* @throws DatabaseServiceException the database service exception
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*/
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@SuppressWarnings({ "unchecked" })
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public List<T> executeCriteriaQuery(CriteriaQuery<Object> criteriaQuery)
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throws DatabaseServiceException;
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/**
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* Execute typed query.
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*
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* @param cq the cq
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* @param startIndex the start index
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* @param offset the offset
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* @return the list
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* @throws DatabaseServiceException the database service exception
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*/
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public List<T> executeTypedQuery(CriteriaQuery<Object> cq, int startIndex,
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int offset) throws DatabaseServiceException;
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/**
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* Root from.
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*
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* @param cq the cq
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* @return the root
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*/
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public abstract Root<T> rootFrom(CriteriaQuery<Object> cq);
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}
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