ASF_20_SRC_AUTO/src/blocks/ojb/java/org/apache/cocoon/ojb/samples/EmployeeDAO.java

/*
 * Copyright 1999-2004 The Apache Software Foundation.
 * 
 * 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.apache.cocoon.ojb.samples;

import javax.jdo.PersistenceManager;
import javax.jdo.Transaction;

import org.apache.cocoon.ojb.jdo.components.JdoPMF;
import org.apache.cocoon.ojb.samples.bean.Employee;
import org.apache.ojb.broker.Identity;
import org.apache.ojb.broker.PersistenceBroker;
import org.apache.ojb.broker.PersistenceBrokerFactory;
/**
 *  Employee's Impl
 *
 * @author <a href="mailto:antonio@apache.org">Antonio Gallardo</a>
 * @version CVS $Id: EmployeeDAO.java,v 1.3 2004/03/05 13:02:02 bdelacretaz Exp $
*/
public class EmployeeDAO {

    public EmployeeDAO(){}

    public void retrieve(Employee bean, JdoPMF pmf) {
        /* 1. Get the PersistenceManager */
        PersistenceManager persistenceManager = pmf.getPersistenceManager();
        
        Employee e = new Employee();
        e.setId(bean.getId());
        PersistenceBroker broker = PersistenceBrokerFactory.defaultPersistenceBroker();
        Identity oid = new Identity(e, broker);
        
        Employee b = new Employee();
        //	2. start transaction
        persistenceManager.currentTransaction().begin();
        // 3. Get the Object based on the primary key
        b = (Employee) persistenceManager.getObjectById(oid, false);
        // 4. Copy data to bean
        copyData(b, bean);
        // 5. End transaction
        persistenceManager.currentTransaction().commit();
    }

    public void insert(Employee e, JdoPMF pmf) {
        /* 1. Get the PersistenceManager */
        PersistenceManager persistenceManager = pmf.getPersistenceManager();
        // 2. Get current transaction
        Transaction tx = persistenceManager.currentTransaction();
        // 3. Start a Transaction
        tx.begin();
        // 4. now perform persistence operations. Store the Employee
        persistenceManager.makePersistent(e);
        // 5. Commit the transaction
        tx.commit();
    }

    public void update(Employee bean, JdoPMF pmf) {
        /* 1. Get the PersistenceManager */
        PersistenceManager persistenceManager = pmf.getPersistenceManager();
        
        Employee e = new Employee();
        e.setId(bean.getId());
        PersistenceBroker broker = PersistenceBrokerFactory.defaultPersistenceBroker();
        Identity oid = new Identity(e, broker);
        
        Employee b = new Employee();
        //	2. start transaction
        persistenceManager.currentTransaction().begin();
        // 3. Get the Object based on the primary key
        b = (Employee) persistenceManager.getObjectById(oid, false);
        // 4. Copy data from bean
        copyData(bean, b);
        // Store to database
        // persistenceManager.makePersistent(b);
        // 5. End transaction
        persistenceManager.currentTransaction().commit();
    }

    public void remove(Employee bean, JdoPMF pmf) {
        /* 1. Get the PersistenceManager */
        PersistenceManager persistenceManager = pmf.getPersistenceManager();
        
        Employee e = new Employee();
        e.setId(bean.getId());
        PersistenceBroker broker = PersistenceBrokerFactory.defaultPersistenceBroker();
        Identity oid = new Identity(e, broker);
        
        Employee b = new Employee();
        //	2. start transaction
        persistenceManager.currentTransaction().begin();
        // 3. Get the Object based on the primary key
        b = (Employee) persistenceManager.getObjectById(oid, false);
        // Delete in the database
        persistenceManager.deletePersistent(b);
        // 5. End transaction
        persistenceManager.currentTransaction().commit();
    }

    private void copyData(Employee from, Employee to) {
        to.setId(from.getId());
        to.setDepartmentId(from.getDepartmentId());
        to.setName(from.getName());
    }
}