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package javax.servlet.jsp.jstl.sql;

import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * <p>Supports the creation of a javax.servlet.jsp.jstl.sql.Result object 
 * from a source java.sql.ResultSet object. A Result object makes it much 
 * easier for page authors to access and manipulate the data resulting 
 * from a SQL query.</p>
 *
 * @author Justyna Horwat
 *
 */
public class ResultSupport {


    /**
     * Converts a <code>ResultSet</code> object to a <code>Result</code> object.
     *
     * @param rs the <code>ResultSet</code> object
     *
     * @return The <code>Result</code> object created from the <code>ResultSet</code>
     */
    public static Result toResult(ResultSet rs) {
        try {
            return new ResultImpl(rs, -1, -1);
        } catch (SQLException ex) {
            return null;
        }
    }

    /**
     * Converts <code>maxRows</code> of a <code>ResultSet</code> object to a 
     * <code>Result</code> object.
     *
     * @param rs the <code>ResultSet</code> object
     * @param maxRows the maximum number of rows to be cached into the <code>Result</code> object.
     *
     * @return The <code>Result</code> object created from the <code>ResultSet</code>,
     * limited by <code>maxRows</code>
     */
    public static Result toResult(ResultSet rs, int maxRows) {
        try {
            return new ResultImpl(rs, -1, maxRows);
        } catch (SQLException ex) {
            return null;
        }
    }

}