org.openeos.wf.internal.dao.WorkflowDefinitionDAOHibernateImpl.java Source code

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Here is the source code for org.openeos.wf.internal.dao.WorkflowDefinitionDAOHibernateImpl.java

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/**
 * Copyright 2014 Fernando Rincon Martin <frm.rincon@gmail.com>
 *
 * 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 org.openeos.wf.internal.dao;

import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Restrictions;
import org.springframework.transaction.annotation.Transactional;

import org.openeos.dao.hibernate.GenericDAOHibernateImpl;
import org.openeos.wf.dao.WorkflowDefinitionDAO;
import org.openeos.wf.model.WorkflowDefinition;

public class WorkflowDefinitionDAOHibernateImpl extends GenericDAOHibernateImpl<WorkflowDefinition, String>
        implements WorkflowDefinitionDAO {

    public WorkflowDefinitionDAOHibernateImpl() {
        super(WorkflowDefinition.class);
    }

    @Override
    @Transactional
    public WorkflowDefinition findLastByKey(String key) {
        Criteria crit = getSession().createCriteria(WorkflowDefinition.class);
        crit.add(Restrictions.eq(WorkflowDefinition.PROPERTY_VALUE, key));
        crit.add(Restrictions.sqlRestriction(
                "{alias}.version=(select max(version) from wf_definition alias_wf where alias_wf.value={alias}.value)"));
        return (WorkflowDefinition) crit.uniqueResult();
    }

    @SuppressWarnings("unchecked")
    @Override
    @Transactional
    public List<WorkflowDefinition> findByKey(String key) {
        Criteria crit = getSession().createCriteria(WorkflowDefinition.class);
        crit.add(Restrictions.eq(WorkflowDefinition.PROPERTY_VALUE, key));
        crit.addOrder(Order.desc(WorkflowDefinition.PROPERTY_VERSION));
        return crit.list();
    }

    @SuppressWarnings("unchecked")
    @Override
    @Transactional
    public List<WorkflowDefinition> findAll() {
        return getSession().createCriteria(WorkflowDefinition.class).list();
    }

}