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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 | +} | |