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package sun.management.counter;

Provides a typesafe enumeration for the Variability attribute for instrumentation objects.
Author: Brian Doherty
/** * 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.
/** * An invalid Variablity value. */
public static final Variability INVALID = new Variability("Invalid",0);
Variability attribute representing Constant counters.
/** * Variability attribute representing Constant counters. */
public static final Variability CONSTANT = new Variability("Constant",1);
Variability attribute representing a Monotonically changing counters.
/** * Variability attribute representing a Monotonically changing counters. */
public static final Variability MONOTONIC = new Variability("Monotonic",2);
Variability attribute representing Variable counters.
/** * Variability attribute representing Variable counters. */
public static final Variability VARIABLE = new Variability("Variable",3);
Returns a string describing this Variability attribute.
Returns:String - a descriptive string for this enum.
/** * 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.
Returns:int - an integer representation of this Variability attribute.
/** * 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 INVALID is returned
Params:
  • value – an integer representation of a Variability attribute
Returns:Variability - The Variability object for the given value or INVALID if out of range.
/** * 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; }