001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *      http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.oozie.executor.jpa;
020
021import java.util.List;
022
023import javax.persistence.EntityManager;
024import javax.persistence.Query;
025
026import org.apache.oozie.client.rest.JsonBean;
027import org.apache.oozie.service.JPAService;
028import org.apache.oozie.service.Services;
029
030/**
031 * Base Class of Query Executor
032 */
033public abstract class QueryExecutor<T, E extends Enum<E>> {
034
035    protected QueryExecutor() {
036    }
037
038    public abstract int executeUpdate(E namedQuery, T jobBean) throws JPAExecutorException;
039
040    public void insert(final JsonBean bean) throws JPAExecutorException {
041        if (bean != null) {
042            JPAService jpaService = Services.get().get(JPAService.class);
043            jpaService.execute(new JsonBeanPersisterExecutor(bean));
044        }
045    }
046
047    public abstract T get(E namedQuery, Object... parameters) throws JPAExecutorException;
048
049    public abstract List<T> getList(E namedQuery, Object... parameters) throws JPAExecutorException;
050
051    public abstract Query getUpdateQuery(E namedQuery, T wfBean, EntityManager em) throws JPAExecutorException;
052
053    public abstract Query getSelectQuery(E namedQuery, EntityManager em, Object... parameters)
054            throws JPAExecutorException;
055
056    public abstract Object getSingleValue(E namedQuery, Object... parameters)
057            throws JPAExecutorException;
058
059    public abstract T getIfExist(E namedQuery, Object... parameters) throws JPAExecutorException;
060
061}