/*
 *  Copyright 2004 Clinton Begin
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.ibatis.sqlmap.engine.type;

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

/**
 * String implementation of TypeHandler
 */
public class StringTypeHandler extends BaseTypeHandler implements TypeHandler {

  public void setParameter(PreparedStatement ps, int i, Object parameter, String jdbcType)
      throws SQLException {
    ps.setString(i, ((String) parameter));
  }

  public Object getResult(ResultSet rs, String columnName)
      throws SQLException {
    Object s = rs.getString(columnName);
    if (rs.wasNull()) {
      return null;
    } else {
      return s;
    }
  }

  public Object getResult(ResultSet rs, int columnIndex)
      throws SQLException {
    Object s = rs.getString(columnIndex);
    if (rs.wasNull()) {
      return null;
    } else {
      return s;
    }
  }

  public Object getResult(CallableStatement cs, int columnIndex)
      throws SQLException {
    Object s = cs.getString(columnIndex);
    if (cs.wasNull()) {
      return null;
    } else {
      return s;
    }
  }

  public Object valueOf(String s) {
    return s;
  }

}