package org.fosstrak.epcis.repository.model;
   
   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.usertype.EnhancedUserType;
  import org.hibernate.usertype.ParameterizedType;
  
  /**
   * Support for mapping Java enumerated types through Hibernate. See
   * http://www.hibernate.org/272.html for more information and discussion.
   * 
   * @author Gavin King
   */
  @SuppressWarnings("unchecked")
  public class EnumUserType implements EnhancedUserType, ParameterizedType {
  
      private Class<Enum> enumClass;
  
      public void setParameterValues(Properties parameters) {
          String enumClassName = parameters.getProperty("enumClassName");
          try {
              enumClass = (Class<Enum>) Class.forName(enumClassName);
          } catch (ClassNotFoundException cnfe) {
              throw new HibernateException("Enum class not found", cnfe);
          }
      }
  
      public Object assemble(Serializable cached, Object owner) throws HibernateException {
          return cached;
      }
  
      public Object deepCopy(Object value) throws HibernateException {
          return value;
      }
  
      public Serializable disassemble(Object value) throws HibernateException {
          return (Enum) value;
      }
  
      public boolean equals(Object x, Object y) throws HibernateException {
          return x == y;
      }
  
      public int hashCode(Object x) throws HibernateException {
          return x.hashCode();
      }
  
      public boolean isMutable() {
          return false;
      }
  
      public Object nullSafeGet(ResultSet rs, String[] names, Object owner) throws HibernateException, SQLException {
          String name = rs.getString(names[0]);
          return rs.wasNull() ? null : Enum.valueOf(enumClass, name);
      }
  
      public void nullSafeSet(PreparedStatement st, Object value, int index) throws HibernateException, SQLException {
          if (value == null) {
              st.setNull(index, Types.VARCHAR);
          } else {
              st.setString(index, ((Enum) value).name());
          }
      }
  
      public Object replace(Object original, Object target, Object owner) throws HibernateException {
          return original;
      }
  
      public Class returnedClass() {
          return enumClass;
      }
  
      public int[] sqlTypes() {
          return new int[] { Types.VARCHAR };
      }
  
      public Object fromXMLString(String xmlValue) {
          return Enum.valueOf(enumClass, xmlValue);
      }
  
      public String objectToSQLString(Object value) {
          return '\'' + ((Enum) value).name() + '\'';
      }
  
      public String toXMLString(Object value) {
          return ((Enum) value).name();
      }
  
  }