//  <tag>
//    <name>field</name>
//    <tagclass>mytags.FieldTag</tagclass>
//    <info>
//        Extract field from current row.
//    </info>
//    <attribute>
//       <name>column</name>
//       <required>true</required>
//    </attribute>
//    <bodycontent>EMPTY</bodycontent>
//  </tag>       

package mytags ;

import javax.servlet.jsp.* ;
import javax.servlet.jsp.tagext.* ;
import java.io.* ;

import java.sql.*;

public class FieldTag extends TagSupport {
    public int doStartTag() throws JspException {
        try {
            JspWriter out = pageContext.getOut() ;

            SelectTag parent =
               (SelectTag) findAncestorWithClass(this, SelectTag.class) ;

            out.print(parent.rs.getString(Integer.parseInt(column))) ;
        } catch (SQLException e) {
            throw new JspTagException(e.getMessage()) ;
        } catch (IOException e) {
            throw new JspTagException(e.getMessage()) ;
        }
        return SKIP_BODY ;
    }

    public void setColumn(String column) {
        this.column = column ;
    }

    private String column ;
}