abid.password.wicket.dao.AbstractHibernateDao.java Source code

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Here is the source code for abid.password.wicket.dao.AbstractHibernateDao.java

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/**
 * Copyright 2012 Abid Khalil
 *
 * 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 abid.password.wicket.dao;

import java.io.Serializable;
import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.Criterion;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Projections;

import com.google.inject.Inject;
import com.google.inject.Provider;
import com.wideplay.warp.persist.TransactionType;
import com.wideplay.warp.persist.Transactional;

public abstract class AbstractHibernateDao<T extends Serializable> {

    @Inject
    private Provider<Session> session;
    private Class<T> persistentClass;

    public AbstractHibernateDao(Class<T> persistentClass) {
        this.persistentClass = persistentClass;
    }

    public Class<T> getPersistentClass() {
        return persistentClass;
    }

    public Provider<Session> getSession() {
        return session;
    }

    @Transactional(type = TransactionType.READ_ONLY)
    @SuppressWarnings("unchecked")
    public List<T> getAll() {
        Criteria criteria = session.get().createCriteria(persistentClass);
        List<T> list = (List<T>) criteria.list();
        return list;
    }

    @Transactional(type = TransactionType.READ_ONLY)
    @SuppressWarnings("unchecked")
    public List<T> get(int first, int fetchSize) {
        Criteria criteria = session.get().createCriteria(persistentClass);
        criteria.setFirstResult(first);
        criteria.setMaxResults(fetchSize);
        criteria.setFetchSize(fetchSize);
        criteria.setCacheable(true);

        List<T> dataList = (List<T>) criteria.list();
        return dataList;
    }

    @Transactional(type = TransactionType.READ_ONLY)
    @SuppressWarnings("unchecked")
    public List<T> getSorted(int first, int fetchSize, String propertyName, boolean ascending) {
        Criteria criteria = session.get().createCriteria(persistentClass);
        criteria.setFirstResult(first);
        criteria.setMaxResults(fetchSize);
        criteria.setFetchSize(fetchSize);
        criteria.setCacheable(true);

        if (ascending) {
            criteria.addOrder(Order.asc(propertyName));
        } else {
            criteria.addOrder(Order.desc(propertyName));
        }

        List<T> dataList = (List<T>) criteria.list();
        return dataList;
    }

    @Transactional(type = TransactionType.READ_ONLY)
    @SuppressWarnings("rawtypes")
    public int countAll() {
        Criteria criteria = session.get().createCriteria(persistentClass);
        criteria.setProjection(Projections.rowCount());

        List result = criteria.list();
        Long rowCount = (Long) result.get(0);
        int count = rowCount.intValue();
        // return ( Long ) criteria.uniqueResult( );
        return count;

    }

    @Transactional(type = TransactionType.READ_ONLY)
    @SuppressWarnings("unchecked")
    protected List<T> findByCriteria(Criterion... criterion) {
        Criteria criteria = session.get().createCriteria(getPersistentClass());
        criteria.setCacheable(true);
        for (Criterion c : criterion) {
            criteria.add(c);
        }
        return criteria.list();
    }

    @Transactional
    public void saveOrUpdate(T entity) {
        session.get().saveOrUpdate(entity);
    }

    @Transactional
    public void delete(T entity) {
        session.get().delete(entity);
    }

}