/* * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.rowset.internal; import java.sql.*;import java.io.*; /** * The abstract base class from which the classes <code>Row</code> * The class <code>BaseRow</code> stores * a row's original values as an array of <code>Object</code> * values, which can be retrieved with the method <code>getOrigRow</code>. * This class also provides methods for getting and setting individual * values in the row. * <P> * A row's original values are the values it contained before it was last * modified.  For example, when the <code>CachedRowSet</code>method * <code>acceptChanges</code> is called, it will reset a row's original * values to be the row's current values.  Then, when the row is modified, * the values that were previously the current values will become the row's * original values (the values the row had immediately before it was modified). * If a row has not been modified, its original values are its initial values. * <P> * Subclasses of this class contain more specific details, such as * the conditions under which an exception is thrown or the bounds for * index parameters. */public abstract class BaseRow implements Serializable, Cloneable { /** * The array containing the original values for this <code>BaseRow</code> * object. * @serial */    protected Object[] origVals; /** * Retrieves the values that this row contained immediately * prior to its last modification. * * @return an array of <code>Object</code> values containing this row's * original values */    public Object[] getOrigRow() {        return origVals;    } /** * Retrieves the array element at the given index, which is * the original value of column number <i>idx</i> in this row. * * @param idx the index of the element to return * @return the <code>Object</code> value at the given index into this *         row's array of original values * @throws <code>SQLException</code> if there is an error */    public abstract Object getColumnObject(int idx) throws SQLException; /** * Sets the element at the given index into this row's array of * original values to the given value.  Implementations of the classes * <code>Row</code> and determine what happens * when the cursor is on the insert row and when it is on any other row. * * @param idx the index of the element to be set * @param obj the <code>Object</code> to which the element at index *              <code>idx</code> to be set * @throws <code>SQLException</code> if there is an error */    public abstract void setColumnObject(int idx, Object obj) throws SQLException;}