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| 1 | /* | ||
| 2 | * Copyright (c) 2000, 2001, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package javax.sql; | ||
| 27 | |||
| 28 | import java.sql.*; | ||
| 29 | |||
| 30 | /** | ||
| 31 | * An object that implements the <code>RowSetWriter</code> interface, | ||
| 32 | * called a <i>writer</i>. A writer may be registered with a <code>RowSet</code> | ||
| 33 | * object that supports the reader/writer paradigm. | ||
| 34 | * <P> | ||
| 35 | * If a disconnected <code>RowSet</code> object modifies some of its data, | ||
| 36 | * and it has a writer associated with it, it may be implemented so that it | ||
| 37 | * calls on the writer's <code>writeData</code> method internally | ||
| 38 | * to write the updates back to the data source. In order to do this, the writer | ||
| 39 | * must first establish a connection with the rowset's data source. | ||
| 40 | * <P> | ||
| 41 | * If the data to be updated has already been changed in the data source, there | ||
| 42 | * is a conflict, in which case the writer will not write | ||
| 43 | * the changes to the data source. The algorithm the writer uses for preventing | ||
| 44 | * or limiting conflicts depends entirely on its implementation. | ||
| 45 | * | ||
| 46 | * @since 1.4 | ||
| 47 | */ | ||
| 48 | |||
| 49 | public interface RowSetWriter { | ||
| 50 | |||
| 51 | /** | ||
| 52 | * Writes the changes in this <code>RowSetWriter</code> object's | ||
| 53 | * rowset back to the data source from which it got its data. | ||
| 54 | * | ||
| 55 | * @param caller the <code>RowSet</code> object (1) that has implemented the | ||
| 56 | * <code>RowSetInternal</code> interface, (2) with which this writer is | ||
| 57 | * registered, and (3) that called this method internally | ||
| 58 | * @return <code>true</code> if the modified data was written; <code>false</code> | ||
| 59 | * if not, which will be the case if there is a conflict | ||
| 60 | * @exception SQLException if a database access error occurs | ||
| 61 | */ | ||
| 62 | boolean writeData(RowSetInternal caller) throws SQLException; | ||
| 63 | |||
| 64 | } | ||