package com.floreantpos.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.MappingException;
import org.hibernate.usertype.ParameterizedType;
import org.hibernate.usertype.UserType;

import com.floreantpos.Messages;

public class EnumUserType implements UserType, ParameterizedType {

   private Class clazz = null;

   public void setParameterValues(Properties params) {
      String enumClassName = params.getProperty("enumClassName");   //$NON-NLS-1$
      if (enumClassName == null) {
         throw new MappingException(Messages.getString("EnumUserType.0"));   //$NON-NLS-1$
      }

      try {
            this.clazz = Class.forName(enumClassName);
        } catch (ClassNotFoundException e) {
         throw new MappingException("enumClass " + enumClassName + " not found", e);   //$NON-NLS-1$ //$NON-NLS-2$
        }
   }

    private static final int[] SQL_TYPES = {Types.VARCHAR};
    public int[] sqlTypes() {
        return SQL_TYPES;
    }

    public Class returnedClass() {
        return clazz;
    }

    public Object nullSafeGet(ResultSet resultSet, String[] names, Object owner)
                             throws HibernateException, SQLException {
        String name = resultSet.getString(names[0]);
        Object result = null;
        if (!resultSet.wasNull()) {
            result = Enum.valueOf(clazz, name);
        }
        return result;
    }

   public void nullSafeSet(PreparedStatement preparedStatement, Object value, int index)
                          throws HibernateException, SQLException {
        if (null == value) {
            preparedStatement.setNull(index, Types.VARCHAR);
        } else {
            preparedStatement.setString(index, value.toString());
        }
    }

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

    public boolean isMutable() {
        return false;
    }

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

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

    public Object replace(Object original, Object target, Object owner) throws HibernateException {
        return original;
    }
    public int hashCode(Object x) throws HibernateException {
        return x.hashCode();
    }
    public boolean equals(Object x, Object y) throws HibernateException {
        if (x == y)
            return true;
        if (null == x || null == y)
            return false;
        return x.equals(y);
    }
}