com.himanshu.um.impl.db.dao.GenericDao.java Source code

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Here is the source code for com.himanshu.um.impl.db.dao.GenericDao.java

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/*
 * Copyright 2013 Himanshu Bhardwaj
 *
 * 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.
*/

package com.himanshu.um.impl.db.dao;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import org.springframework.transaction.annotation.Transactional;

import com.himanshu.um.api.performance.annotation.MonitorPerformance;

public class GenericDao<T> {

    private EntityManager em;

    public EntityManager getEm() {
        return em;
    }

    @PersistenceContext
    public void setEm(EntityManager em) {
        this.em = em;
    }

    @Transactional
    public T save(T t) {
        em.persist(t);
        return t;
    }

    public List<T> findAll(Class<T> entityClass) {
        return em.createQuery("from " + entityClass.getCanonicalName()).getResultList();
    }

    @MonitorPerformance
    public void performanceMonitorTest() {
        //NOOP
    }

}