EnumUserType.java

/*
Name: 
    - EnumUserType

Description: 
    -  

Requires:
    - 
    
Provides:
    - 

Part of: ProcessPuzzle Framework, Domain and Business Model Ready Architecture. Provides content, workflow and social networking functionality. 
http://www.processpuzzle.com

ProcessPuzzle - Content and Workflow Management Integration Business Platform

Author(s): 
    - Zsolt Zsuffa

Copyright: (C) 2011 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, either version 3 of the License, 
or (at your option) any later version.

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 com.processpuzzle.persistence.domain;

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

import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.usertype.ParameterizedType;
import org.hibernate.usertype.UserType;

public class EnumUserType implements UserType, ParameterizedType {

   private static final int[] SQL_TYPES = new int[] { Types.INTEGER };
   private Class<?> targetClass;

   public void setParameterValues( Properties parameters ) {
      String targetClassName = parameters.getProperty( "targetClass" );
      try{
         targetClass = Class.forName( targetClassName );
      }catch( ClassNotFoundException e ){
         throw new HibernateException( "Class " + targetClassName + " not found ", e );
      }
   }

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

   public Class returnedClass() {
      return targetClass;
   }

   public boolean equals( Object x, Object y ) throws HibernateException {
      return(x == y);
   }

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

   public Object nullSafeGet( ResultSet rs, String[] names, Object owner ) throws HibernateException, SQLException {
      int value = rs.getInt( names[0] );
      return rs.wasNull() ? null : Enum.get( value );
   }

   public void nullSafeSet( PreparedStatement st, Object value, int index ) throws HibernateException, SQLException {
      if( value == null ){
         st.setNull( index, Types.INTEGER );
      }else{
         st.setInt( index, ((Enum) value).getValue() );
      }
   }

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

   public boolean isMutable() {
      return false;
   }

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

   public Object assemble( Serializable cached, Object owner ) throws HibernateException {
      return cached;
   }

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

   @Override
   public Object nullSafeGet( ResultSet arg0, String[] arg1, SessionImplementor arg2, Object arg3 ) throws HibernateException, SQLException {
      // TODO Auto-generated method stub
      return null;
   }

   @Override
   public void nullSafeSet( PreparedStatement arg0, Object arg1, int arg2, SessionImplementor arg3 ) throws HibernateException, SQLException {
      // TODO Auto-generated method stub
      
   }
}