Example usage for javax.persistence EntityManager getDelegate

Introduction

In this page you can find the example usage for javax.persistence EntityManager getDelegate.

Prototype

public Object getDelegate();

Source Link

Document

Return the underlying provider object for the EntityManager, if available.

Usage

From source file:edu.harvard.med.iccbl.dev.HibernateConsole.java

public static void main(String[] args) {
    BufferedReader br = null;/* w ww .j  a  va 2s .c  o m*/
    try {
        CommandLineApplication app = new CommandLineApplication(args);
        app.processOptions(true, false);
        br = new BufferedReader(new InputStreamReader(System.in));

        EntityManagerFactory emf = (EntityManagerFactory) app.getSpringBean("entityManagerFactory");
        EntityManager em = emf.createEntityManager();

        do {
            System.out.println("Enter HQL query (blank to quit): ");
            String input = br.readLine();
            if (input.length() == 0) {
                System.out.println("Goodbye!");
                System.exit(0);
            }
            try {
                List list = ((Session) em.getDelegate()).createQuery(input).list(); // note: this uses the Hibernate Session object, to allow HQL (and JPQL)
                // List list = em.createQuery(input).getResultList();  // note: this JPA method supports JPQL

                System.out.println("Result:");
                for (Iterator iter = list.iterator(); iter.hasNext();) {
                    Object item = iter.next();
                    // format output from multi-item selects ("select a, b, c, ... from ...")
                    if (item instanceof Object[]) {
                        List<Object> fields = Arrays.asList((Object[]) item);
                        System.out.println(StringUtils.makeListString(fields, ", "));
                    }
                    // format output from single-item selected ("select a from ..." or "from ...")
                    else {
                        System.out.println("[" + item.getClass().getName() + "]: " + item);
                    }
                }
                System.out.println("(" + list.size() + " rows)\n");
            } catch (Exception e) {
                System.out.println("Hibernate Error: " + e.getMessage());
                log.error("Hibernate error", e);
            }
            System.out.println();
        } while (true);
    } catch (Exception e) {
        System.err.println("Fatal Error: " + e.getMessage());
        e.printStackTrace();
    } finally {
        IOUtils.closeQuietly(br);
    }
}

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From source file:cn.guoyukun.spring.jpa.repository.hibernate.HibernateUtils.java

/**
 * ?jpa EntityManager ? hibernate Session API
 *
 * @param em/*from  w  w  w .  j  av  a 2  s  . c om*/
 * @return
 */
public static Session getSession(EntityManager em) {
    return (Session) em.getDelegate();
}

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From source file:com.hmsinc.epicenter.model.util.ModelUtils.java

/**
 * Creates a cacheable native Hibernate query.
 * /*from  www. ja  v a  2  s . c  o  m*/
 * @param entityManager
 * @param query
 * @return
 */
public static org.hibernate.Query nativeQuery(final EntityManager entityManager, final String query) {
    return ((Session) entityManager.getDelegate()).createQuery(query).setCacheable(true);
}

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From source file:com.hmsinc.epicenter.model.util.ModelUtils.java

/**
 * Creates a native SQL query./*  www . j  a  v a2s. c o  m*/
 * 
 * @param entityManager
 * @param query
 * @return
 */
public static SQLQuery sqlQuery(final EntityManager entityManager, final String query) {
    return ((Session) entityManager.getDelegate()).createSQLQuery(query);
}

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From source file:com.hmsinc.epicenter.model.util.ModelUtils.java

/**
 * Disables "nested loops" optimization on PostgreSQL. This is needed with
 * various spatial queries that confuse the optimizer.
 * /* w w  w . j a  va2 s. c  om*/
 * @param entityManager
 */
public static void disableNestedLoops(final EntityManager entityManager) {

    final Session s = (Session) entityManager.getDelegate();
    final SessionFactoryImpl sf = (SessionFactoryImpl) s.getSessionFactory();
    if (sf.getDialect() instanceof PostgreSQLDialect) {
        s.doWork(new Work() {
            public void execute(Connection conn) throws SQLException {
                conn.createStatement().execute("set enable_nestloop=off");
            }

        });
    }
}

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From source file:com.hmsinc.epicenter.model.util.ModelUtils.java

/**
 * Enables "nested loops" optimization on PostgreSQL. This is needed with
 * various spatial queries that confuse the optimizer.
 * /*from  w w w.j  a  v a2  s.c om*/
 * @param entityManager
 */
public static void enableNestedLoops(final EntityManager entityManager) {

    final Session s = (Session) entityManager.getDelegate();
    final SessionFactoryImpl sf = (SessionFactoryImpl) s.getSessionFactory();
    if (sf.getDialect() instanceof PostgreSQLDialect) {
        s.doWork(new Work() {
            public void execute(Connection conn) throws SQLException {
                conn.createStatement().execute("set enable_nestloop=on");
            }

        });
    }
}

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From source file:com.hmsinc.epicenter.model.util.ModelUtils.java

/**
 * Creates a cacheable native Hibernate named query.
 * /*w ww .  j  av a2s  .com*/
 * @param entityManager
 * @param namedQuery
 * @return
 */
public static org.hibernate.Query nativeNamedQuery(final EntityManager entityManager, final String namedQuery) {
    return ((Session) entityManager.getDelegate()).getNamedQuery(namedQuery).setCacheable(true);
}

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From source file:com.hmsinc.epicenter.model.util.ModelUtils.java

/**
 * Creates a native hibernate Criteria query.
 * // w  w  w.  j av  a  2s  . co m
 * @param entityManager
 * @param persistentClass
 * @return
 */
public static Criteria criteriaQuery(final EntityManager entityManager, final Class<?> persistentClass) {
    return ((Session) entityManager.getDelegate()).createCriteria(persistentClass).setCacheable(true);
}

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From source file:com.hmsinc.epicenter.model.util.ModelUtils.java

/**
 * Creates a native hibernate Criteria query with an alias.
 * /* ww w  . j  a v  a 2  s .  c om*/
 * @param entityManager
 * @param persistentClass
 * @param alias
 * @return
 */
public static Criteria criteriaQuery(final EntityManager entityManager, final Class<?> persistentClass,
        final String alias) {
    return ((Session) entityManager.getDelegate()).createCriteria(persistentClass, alias).setCacheable(true);
}

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From source file:com.impetus.kvapps.runner.ExecutorService.java

/**
 * On find by native CQL3 query.//w w  w.j  a v a 2  s .  c om
 * 
 * @param em            entity manager instance.
 * @param query         native cql3 query.
 */
@SuppressWarnings("unchecked")
static void findByNativeQuery(final EntityManager em, final String query) {

    Query q = em.createNativeQuery(query, Tweets.class);

    Map<String, Client> clients = (Map<String, Client>) em.getDelegate();
    ThriftClient client = (ThriftClient) clients.get("twissandra");
    client.setCqlVersion(CassandraConstants.CQL_VERSION_3_0);

    logger.info("[On Find Tweets by CQL3]");
    List<Tweets> tweets = q.getResultList();

    System.out.println("#######################START##########################################");
    logger.info("\t\t User's total tweets:" + tweets.size());
    onPrintTweets(tweets);
    logger.info("\n");
    // logger.info("First tweet:" users.get(0).getTweets().);
    System.out.println("#######################END############################################");
    logger.info("\n");
}

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