| /* |
| * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.jvmstat.monitor; |
| |
| /** |
| * Provides a typesafe enumeration for the Variability attribute for |
| * instrumentation objects. |
| * |
| * @author Brian Doherty |
| */ |
| public class Variability implements java.io.Serializable { |
| |
| /* The enumeration values for this typesafe enumeration must be |
| * kept in synchronization with the Variability enum in the perfData.hpp file |
| * in the HotSpot source base. |
| */ |
| |
| private static final int NATTRIBUTES = 4; |
| private static Variability[] map = new Variability[NATTRIBUTES]; |
| |
| private String name; |
| private int value; |
| |
| /** |
| * An invalid Variablity value. |
| */ |
| public static final Variability INVALID = new Variability("Invalid",0); |
| |
| /** |
| * Variability attribute representing Constant counters. |
| */ |
| public static final Variability CONSTANT = new Variability("Constant",1); |
| |
| /** |
| * Variability attribute representing a Monotonically changing counters. |
| */ |
| public static final Variability MONOTONIC = new Variability("Monotonic",2); |
| |
| /** |
| * Variability attribute representing Variable counters. |
| */ |
| public static final Variability VARIABLE = new Variability("Variable",3); |
| |
| /** |
| * Returns a string describing this Variability attribute. |
| * |
| * @return String - a descriptive string for this enum. |
| */ |
| public String toString() { |
| return name; |
| } |
| |
| /** |
| * Returns the integer representation of this Variability attribute. |
| * |
| * @return int - an integer representation of this Variability attribute. |
| */ |
| public int intValue() { |
| return value; |
| } |
| |
| /** |
| * Maps an integer value its corresponding Variability attribute. |
| * If the integer value does not have a corresponding Variability enum |
| * value, the {@link Variability#INVALID} is returned |
| * |
| * @param value an integer representation of a Variability attribute |
| * @return Variability - The Variability object for the given |
| * <code>value</code> or {@link Variability#INVALID} |
| * if out of range. |
| */ |
| public static Variability toVariability(int value) { |
| |
| if (value < 0 || value >= map.length || map[value] == null) { |
| return INVALID; |
| } |
| |
| return map[value]; |
| } |
| |
| private Variability(String name, int value) { |
| this.name = name; |
| this.value = value; |
| map[value]=this; |
| } |
| |
| private static final long serialVersionUID = 6992337162326171013L; |
| } |