org.fireflow.engine.modules.persistence.hibernate.ActivityInstancePersisterHibernateImpl.java Source code

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Here is the source code for org.fireflow.engine.modules.persistence.hibernate.ActivityInstancePersisterHibernateImpl.java

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/**
 * Copyright 2007-2010 ?
 * All rights reserved. 
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see http://www.gnu.org/licenses. *
 */
package org.fireflow.engine.modules.persistence.hibernate;

import java.sql.SQLException;
import java.util.List;

import org.fireflow.engine.entity.runtime.ActivityInstance;
import org.fireflow.engine.entity.runtime.ActivityInstanceState;
import org.fireflow.engine.entity.runtime.impl.ActivityInstanceHistory;
import org.fireflow.engine.entity.runtime.impl.ActivityInstanceImpl;
import org.fireflow.engine.modules.persistence.ActivityInstancePersister;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.LockMode;
import org.hibernate.Session;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Restrictions;
import org.springframework.orm.hibernate3.HibernateCallback;

/**
 * 
 * 
 * @author ?
 * @version 2.0
 */
public class ActivityInstancePersisterHibernateImpl extends AbsPersisterHibernateImpl
        implements ActivityInstancePersister {

    /* (non-Javadoc)
     * @see org.fireflow.engine.persistence.ActivityInstancePersister#countAliveActivityInstance(java.lang.String, java.lang.String)
     */
    public int countAliveActivityInstance(final String processInstanceId, final String nodeId) {
        Object result = this.getHibernateTemplate().execute(new HibernateCallback() {

            public Object doInHibernate(Session session) throws HibernateException, SQLException {
                Criteria criteria = session.createCriteria(ActivityInstanceImpl.class);
                criteria.add(Restrictions.eq("processInstanceId", processInstanceId))
                        .add(Restrictions.eq("nodeId", nodeId))
                        .add(Restrictions.lt("state", ActivityInstanceState.DELIMITER))
                        .setProjection(Projections.rowCount());

                return criteria.uniqueResult();
            }

        });

        if (result instanceof Integer) {
            return (Integer) result;
        } else if (result instanceof Long) {
            return ((Long) result).intValue();
        }
        return 0;
    }

    /**
     * ?class
     * @return
     */
    public Class getEntityClass4Runtime(Class interfaceClz) {
        return ActivityInstanceImpl.class;
    }

    /**
     * ?class
     * @return
     */
    public Class getEntityClass4History(Class interfaceClz) {
        return ActivityInstanceHistory.class;
    }

    public void lockActivityInstance(String activityInstanceId) {
        this.getHibernateTemplate().get(ActivityInstanceImpl.class, activityInstanceId, LockMode.UPGRADE);
    }

    /* (non-Javadoc)
     * @see org.fireflow.engine.modules.persistence.ActivityInstancePersister#findActivityInstances(java.lang.String, java.lang.String)
     */
    public List<ActivityInstance> findActivityInstances(final String processInstanceId, final String activityId) {
        Object result = this.getHibernateTemplate().execute(new HibernateCallback() {

            public Object doInHibernate(Session session) throws HibernateException, SQLException {
                Criteria criteria = session.createCriteria(ActivityInstanceImpl.class);
                criteria.add(Restrictions.eq("processInstanceId", processInstanceId))
                        .add(Restrictions.eq("nodeId", activityId)).addOrder(Order.desc("stepNumber"));

                return criteria.list();
            }

        });

        return (List<ActivityInstance>) result;
    }

    public List<ActivityInstance> findActivityInstances(final String processInstanceId) {
        Object result = this.getHibernateTemplate().execute(new HibernateCallback() {

            public Object doInHibernate(Session session) throws HibernateException, SQLException {
                Criteria criteria = session.createCriteria(ActivityInstanceImpl.class);
                criteria.add(Restrictions.eq("processInstanceId", processInstanceId))
                        .addOrder(Order.desc("stepNumber"));

                return criteria.list();
            }

        });

        return (List<ActivityInstance>) result;
    }
}