/*
* Copyright (c) 2000, 2001, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* 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
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*/
package javax.sql;
import java.sql.*;
/**
* An object that implements the <code>RowSetWriter</code> interface,
* called a <i>writer</i>. A writer may be registered with a <code>RowSet</code>
* object that supports the reader/writer paradigm.
* <P>
* If a disconnected <code>RowSet</code> object modifies some of its data,
* and it has a writer associated with it, it may be implemented so that it
* calls on the writer's <code>writeData</code> method internally
* to write the updates back to the data source. In order to do this, the writer
* must first establish a connection with the rowset's data source.
* <P>
* If the data to be updated has already been changed in the data source, there
* is a conflict, in which case the writer will not write
* the changes to the data source. The algorithm the writer uses for preventing
* or limiting conflicts depends entirely on its implementation.
*
* @since 1.4
*/
public interface RowSetWriter {
/**
* Writes the changes in this <code>RowSetWriter</code> object's
* rowset back to the data source from which it got its data.
*
* @param caller the <code>RowSet</code> object (1) that has implemented the
* <code>RowSetInternal</code> interface, (2) with which this writer is
* registered, and (3) that called this method internally
* @return <code>true</code> if the modified data was written; <code>false</code>
* if not, which will be the case if there is a conflict
* @exception SQLException if a database access error occurs
*/
boolean writeData(RowSetInternal caller) throws SQLException;
}