/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jbpm.db.hibernate;

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;
import org.jbpm.context.exe.Converter;

/**
 * is the hibernate UserType for storing converters as a char in the database.
 * The conversion can be found (and customized) in the file
 * jbpm.converter.properties.
 */
public class ConverterEnumType implements UserType, Serializable {

  private static final long serialVersionUID = 1L;
  private static final int[] SQLTYPES = { Types.CHAR };

  public boolean equals(Object o1, Object o2) {
    return o1 == o2;
  }

  public int hashCode(Object o) throws HibernateException {
    return o.hashCode();
  }

  public Object deepCopy(Object o) throws HibernateException {
    return o;
  }

  public boolean isMutable() {
    return false;
  }

  public Serializable disassemble(Object o) throws HibernateException {
    return (Serializable) o;
  }

  public Object assemble(Serializable s, Object o) throws HibernateException {
    return s;
  }

  public Object replace(Object original, Object target, Object owner) {
    return target;
  }

  public int[] sqlTypes() {
    return SQLTYPES;
  }

  public Class returnedClass() {
    return Converter.class;
  }

  public Object nullSafeGet(ResultSet resultSet, String[] names, Object owner)
      throws HibernateException, SQLException {
    String converterDatabaseId = resultSet.getString(names[0]);
    return Converters.getConverterByDatabaseId(converterDatabaseId);
  }

  public void nullSafeSet(PreparedStatement preparedStatement, Object value,
      int index) throws HibernateException, SQLException {
    String converterDatabaseId = Converters.getConverterId((Converter) value);
    preparedStatement.setString(index, converterDatabaseId);
  }
}