1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 * 26 * ident "%Z%%M% %I% %E% SMI" 27 */ 28 package org.opensolaris.os.dtrace; 29 30 /** 31 * A value accumulated by an aggregating DTrace action such as {@code 32 * count()} or {@code sum()}. Each {@code AggregationValue} is 33 * associated with a {@link Tuple} in an {@link AggregationRecord}. In 34 * other words it is a value in a key-value pair (each pair representing 35 * an entry in a DTrace aggregation). 36 * <p> 37 * This value may be a single number or consist of multiple numbers, 38 * such as a value distribution. In the latter case, it still has a 39 * single, composite value useful for display and/or comparison. 40 * 41 * @see AggregationRecord 42 * 43 * @author Tom Erickson 44 */ 45 public interface AggregationValue { 46 /** 47 * Gets the numeric value of this instance. 48 * 49 * @return non-null numeric value 50 */ getValue()51 public Number getValue(); 52 } 53