AggregationValue.java revision fb3fb4f3d76d55b64440afd0af72775dfad3bd1d
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
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*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
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/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* ident "%Z%%M% %I% %E% SMI"
*/
/**
* A value accumulated by an aggregating DTrace action such as {@code
* count()} or {@code sum()}. Each {@code AggregationValue} is
* associated with a {@link Tuple} in an {@link AggregationRecord}. In
* other words it is a value in a key-value pair (each pair representing
* an entry in a DTrace aggregation).
* <p>
* This value may be a single number or consist of multiple numbers,
* such as a value distribution. In the latter case, it still has a
*
* @see AggregationRecord
*
* @author Tom Erickson
*/
public interface AggregationValue {
/**
* Gets the numeric value of this instance.
*
* @return non-null numeric value
*/
}