/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Kowari Metadata Store.
*
* The Initial Developer of the Original Code is Plugged In Software Pty
* Ltd (http://www.pisoftware.com, mailto:info@pisoftware.com). Portions
* created by Plugged In Software Pty Ltd are Copyright (C) 2001,2002
* Plugged In Software Pty Ltd. All Rights Reserved.
*
* Contributor(s): N/A.
*
* [NOTE: The text of this Exhibit A may differ slightly from the text
* of the notices in the Source Code files of the Original Code. You
* should use the text of this Exhibit A rather than the text found in the
* Original Code Source Code for Your Modifications.]
*
*/
package org.mulgara.resolver;
// Local packages
import org.mulgara.resolver.spi.DatabaseMetadata;
import org.mulgara.resolver.spi.SystemResolver;
/**
* {@link Operation}s correspond to methods of the {@link org.mulgara.server.Session} interface
* which need to be performed in a transactional context.
*
* They are created and used by {@link DatabaseSession}.
*
* @created 2004-10-07
* @author <a href="http://staff.pisoftware.com/raboczi">Simon Raboczi</a>
* @version $Revision: 1.8 $
* @modified $Date: 2005/01/05 04:58:24 $ by $Author: newmana $
* @company <a href="mailto:info@PIsoftware.com">Plugged In Software</a>
* @copyright ©2004 <a href="http://www.tucanatech.com/">Tucana
* Technology, Inc</a>
* @licence <a href="{@docRoot}/../../LICENCE">Mozilla Public License v1.1</a>
*/
interface Operation {
/**
* Perform a transactional operation.
*
* @param systemResolver
* @param metadata
* @throws Exception if the operation cannot be completed
*/
public void execute(OperationContext operationContext,
SystemResolver systemResolver,
DatabaseMetadata metadata) throws Exception;
/**
* @return whether this operation modifies graphs
*/
public boolean isWriteOperation();
}