/*
* Copyright (c) 2003, 2004, 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
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*/
package sun.management.counter;
/**
* 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;
}