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/*******************************************************************************
* Copyright (c) 2010-2016, Gabor Bergmann, IncQueryLabs Ltd.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package tools.refinery.viatra.runtime.rete.aggregation;
import tools.refinery.viatra.runtime.rete.index.Indexer;
/**
* Expresses that aggregators expose specialized non-enumerable indexers for outer joining.
* @author Gabor Bergmann
*
* @since 1.4
*
*/
public interface IAggregatorNode {
Indexer getAggregatorOuterIndexer();
Indexer getAggregatorOuterIdentityIndexer(int resultPositionInSignature);
}
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