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package com.clickntap.tool.jdbc;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.jdbc.core.RowMapper;

import com.clickntap.utils.IOUtils;

public class JdbcOutputStreamRowMapper implements RowMapper {

  private OutputStream outputStream;

  private int offset = 0;
  private int length = 0;

  public JdbcOutputStreamRowMapper(OutputStream outputStream) {
    this.outputStream = outputStream;
  }

  public JdbcOutputStreamRowMapper(OutputStream outputStream, int offset, int length) {
    this(outputStream);
    this.offset = offset;
    this.length = length;
  }

  public Object mapRow(ResultSet rs, int i) throws SQLException {
    InputStream inputStream = rs.getBinaryStream(1);
    if (rs.wasNull())
      return null;
    try {
      if (length > 0)
        IOUtils.copy(inputStream, outputStream, offset, length);
      else
        IOUtils.copy(inputStream, outputStream);
      inputStream.close();
    } catch (IOException e) {
    }
    return null;
  }
}