package org.apache.ibatis.type;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class EnumTypeHandler<E extends Enum<E>> extends BaseTypeHandler<E> {

  private Class<E> type;

  public EnumTypeHandler(Class<E> type) {
    this.type = type;
  }

  public void setNonNullParameter(PreparedStatement ps, int i, E parameter, JdbcType jdbcType) throws SQLException {
    if (jdbcType == null) {
        ps.setString(i, parameter.toString());
    } else {
        ps.setObject(i, parameter.toString(), jdbcType.TYPE_CODE);
    }
  }

  public E getNullableResult(ResultSet rs, String columnName) throws SQLException {
    String s = rs.getString(columnName);
    return s == null ? null : Enum.valueOf(type, s);
  }

  public E getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
    String s = cs.getString(columnIndex);
    return s == null ? null : Enum.valueOf(type, s);
  }

}
package org.apache.ibatis.type;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class EnumTypeHandler<E extends Enum<E>> extends BaseTypeHandler<E> {

  private Class<E> type;

  public EnumTypeHandler(Class<E> type) {
    this.type = type;
  }

  public void setNonNullParameter(PreparedStatement ps, int i, E parameter, JdbcType jdbcType) throws SQLException {
    if (jdbcType == null) {
        ps.setString(i, parameter.name());
    } else {
        ps.setObject(i, parameter.name(), jdbcType.TYPE_CODE);
    }
  }

  public E getNullableResult(ResultSet rs, String columnName) throws SQLException {
    String s = rs.getString(columnName);
    return s == null ? null : Enum.valueOf(type, s);
  }

  public E getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
    String s = cs.getString(columnIndex);
    return s == null ? null : Enum.valueOf(type, s);
  }

}
Fix for http://code.google.com/p/mybatis/issues/detail?id=424 - EnumTypeHandler should use Enum.name() rather than Enum.toString()