/**
* diqube: Distributed Query Base.
*
* Copyright (C) 2015 Bastian Gloeckle
*
* This file is part of diqube.
*
* diqube is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.diqube.execution.consumers;
import java.util.List;
import java.util.Map;
import org.diqube.execution.consumers.GenericConsumer.IdentifyingConsumerClass;
/**
* This {@link OverwritingConsumer} provides rowID based grouping information.
*
* @author Bastian Gloeckle
*/
@IdentifyingConsumerClass(GroupConsumer.class)
public interface GroupConsumer extends OverwritingConsumer {
/**
* Is called as soon as there is new grouping data available.
*
* This is a {@link OverwritingConsumer}: After this has been called, the value that was used in previous calls to
* this method is invalid.
*
* @param fullGroups
* Map from an identifying row ID (="group ID") to array of RowIds that have been found to be inside that
* group. <b>The contents of this map MUST NOT be changed in any way!</b>
*/
public void consumeGroups(Map<Long, List<Long>> fullGroups);
}