bprocessor-commit

[Jesper P. <je...@us...>]

Update of /cvsroot/bprocessor/model/src/net/sourceforge/bprocessor/model
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv15811

Added Files:
	AttributeFacade.java 
Log Message:
Initial import

--- NEW FILE: AttributeFacade.java ---
//---------------------------------------------------------------------------------
// $Id: AttributeFacade.java,v 1.1 2005/08/24 06:58:06 jews Exp $
//
// Copyright (c) 2005      The BProcessor Team (http://bprocessor.sourceforge.net) 
// Released under the Lesser GNU Public License v2.1
//---------------------------------------------------------------------------------
package net.sourceforge.bprocessor.model;

import net.sourceforge.bprocessor.model.db.HibernateUtil;

import org.apache.log4j.Logger;
import org.hibernate.Session;
import org.hibernate.Transaction;

/**
 * Facade for attribute
 */
public class AttributeFacade {
  /** The logger */
  private static Logger log = Logger.getLogger(AttributeFacade.class);

  /** The instance */
  private static AttributeFacade instance;

  /**
   * Constructor
   */
  private AttributeFacade() {
  }

  /**
   * Get the instance
   * @return The instance
   */
  public static synchronized AttributeFacade getInstance() {
    if (instance == null) {
      instance = new AttributeFacade();
    }
    return instance;
  }

  /**
   * Create an attribute
   * @param a The attribute
   * @return The created attribute
   */
  public synchronized Attribute create(Attribute a) {
    HibernateUtil hu = HibernateUtil.getInstance();
    try {
      Session session = hu.currentSession();
      Transaction tx = session.beginTransaction();

      session.save(a);

      tx.commit();
    } catch (Exception ex) {
      log.error(ex.getMessage(), ex);
    } finally {
      hu.closeSession();
    }

    return a;
  }

  /**
   * Update an attribute
   * @param a The attribute
   */
  public synchronized void update(Attribute a) {
    HibernateUtil hu = HibernateUtil.getInstance();
    try {
      Session session = hu.currentSession();
      Transaction tx = session.beginTransaction();

      session.update(a);

      tx.commit();
    } catch (Exception ex) {
      log.error(ex.getMessage(), ex);
    } finally {
      hu.closeSession();
    }
  }

  /**
   * Remove an attribute
   * @param a The attribute
   */
  public synchronized void remove(Attribute a) {
    HibernateUtil hu = HibernateUtil.getInstance();
    try {
      Session session = hu.currentSession();
      Transaction tx = session.beginTransaction();

      session.delete(a);

      tx.commit();
    } catch (Exception ex) {
      log.error(ex.getMessage(), ex);
    } finally {
      hu.closeSession();
    }
  }

  /**
   * Find a attribute by id
   * @param id The id
   * @return The attribute
   */
  public synchronized Attribute findById(Long id) {
    Attribute result = null;

    HibernateUtil hu = HibernateUtil.getInstance();
    try {
      Session session = hu.currentSession();
      Transaction tx = session.beginTransaction();

      result = (Attribute)session.load(Attribute.class, id);

      tx.commit();
    } catch (Exception ex) {
      log.error(ex.getMessage(), ex);
    } finally {
      hu.closeSession();
    }

    return result;
  }
}