aggregationoperator.java

High performance DB query

/*
 * @(#)$Id: AggregationOperator.java,v 1.6 2005/04/13 20:17:44 huebsch Exp $
 *
 * Copyright (c) 2001-2004 Regents of the University of California.
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached BERKELEY-LICENSE
 * file. If you do not find these files, copies can be found by writing to:
 * Computer Science Division, Database Group, Universite of California,
 * 617 Soda Hall #1776, Berkeley, CA 94720-1776. Attention: Berkeley License
 *
 * Copyright (c) 2003-2004 Intel Corporation. All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE file.
 * If you do not find these files, copies can be found by writing to:
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300,
 * Berkeley, CA, 94704.  Attention:  Intel License Inquiry.
 */


package pier.helpers.aggregation;

import pier.data.AbstractDataType;
import services.network.Payload;

/**
 * Interface AggregationOperator
 *
 */
public interface AggregationOperator extends Payload, AbstractDataType {

    /**
     * Method addBaseValue
     *
     * @param data
     * @return
     */
    public boolean addBaseValue(Object data);

    /**
     * Method addPartialResult
     *
     * @param data
     * @return
     */
    public boolean addPartialResult(AggregationOperator data);

    /**
     * Method result
     * @return
     */
    public Object result();
}