/**
* $Id: Exportable.java 105077 2012-02-24 22:54:29Z ottenhoff@longsight.com $
* $URL: https://source.sakaiproject.org/svn/entitybroker/trunk/api/src/java/org/sakaiproject/entitybroker/entityprovider/capabilities/Exportable.java $
* AutoRegister.java - entity-broker - 31 May 2007 7:01:11 PM - azeckoski
**************************************************************************
* Copyright (c) 2007, 2008 The Sakai Foundation
*
* Licensed under the Educational Community License, Version 2.0 (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.opensource.org/licenses/ECL-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
package org.sakaiproject.entitybroker.entityprovider.capabilities;
import java.io.OutputStream;
import java.util.Map;
import org.sakaiproject.entitybroker.entityprovider.EntityProvider;
import org.sakaiproject.entitybroker.entityprovider.search.Search;
/**
* Indicates an entity provider has the capability of exporting entity data which is related to
* other entities, note that the decision about which data to export is left up to the implementor
* based on the reference supplied <br/> This is one of the capability extensions for the
* {@link EntityProvider} interface<br/>
*
* @author Aaron Zeckoski (aaronz@vt.edu)
*/
public interface Exportable extends EntityProvider {
/**
* Request an export stream of data from an entity provider for all data related to a specific
* entity (this will probably not be an entity in this provider), search, and parameters<br/>
* This is primarily to support the use case archiving and exporting data from a system which related
* to a user or a site/group<br/>
*
* @param reference
* a globally unique reference to an entity, this is the entity that the exported data
* should be associated with (e.g. a reference to a site object or user)
* @param search (optional) a search which should be used to limit the data which is exported, may be null
* @param data a stream to put the export data into which will be saved by the archiver/exporter
* @param destructive if false then the data being exported is not changed,
* if true then the data should be deleted or hidden (depending on the internal operation of the entity)
* @param params (optional) incoming set of parameters which may be used to send data specific to this request, may be null
* @return a string key representing the encoding used and possibly other info like a version, this
* allows the export to provide tips to the import when data is streamed back in, if
* there is no data to export then a null will be returned
*/
public String exportData(String reference, Search search, OutputStream data, boolean destructive, Map<String, Object> params);
}