/*
 * $Header: /home/cvs/jakarta-commons/dbutils/src/java/org/apache/commons/dbutils/RowProcessor.java,v 1.1 2003/11/02 19:15:23 dgraham Exp $
 * $Revision: 1.1 $
 * $Date: 2003/11/02 19:15:23 $
 * 
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowledgement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgement may appear in the software itself,
 *    if and wherever such third-party acknowledgements normally appear.
 *
 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */

package org.apache.commons.dbutils;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;

/**
 * RowProcessor implementations convert 
 * ResultSet rows into various other objects.  Implementations
 * can extend BasicRowProcessor to protect themselves
 * from changes to this interface. 
 * 
 * @see BasicRowProcessor
 * @author David Graham
 */
public interface RowProcessor {

    /**
     * Create an Object[] from the column values in one 
     * ResultSet row.  The ResultSet should be 
     * positioned on a valid row before passing it to this method.  
     * Implementations of this method must not alter the row position of 
     * the ResultSet. 
     */
    public Object[] toArray(ResultSet rs) throws SQLException;

    /**
     * Create a JavaBean from the column values in one ResultSet 
     * row.  The ResultSet should be positioned on a valid row before
     * passing it to this method.  Implementations of this method must not
     * alter the row position of the ResultSet.
     */
    public Object toBean(ResultSet rs, Class type) throws SQLException;

    /**
     * Create a List of JavaBeans from the column values in all 
     * ResultSet rows.  ResultSet.next() should 
     * not be called before passing it to this method.
     * 
     * @return A List of beans with the given type in the order 
     * they were returned by the ResultSet.
     */
    public List toBeanList(ResultSet rs, Class type) throws SQLException;

    /**
     * Create a Map from the column values in one 
     * ResultSet row.  The ResultSet should be 
     * positioned on a valid row before
     * passing it to this method.  Implementations of this method must not
     * alter the row position of the ResultSet.
     */
    public Map toMap(ResultSet rs) throws SQLException;

}