1 /*
   2  * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.management.counter;
  27 
  28 /**
  29  * The base class for a performance counter.
  30  *
  31  * @author   Brian Doherty
  32  */
  33 public interface Counter extends java.io.Serializable {
  34 
  35     /**
  36      * Returns the name of this performance counter
  37      */
  38     public String getName();
  39 
  40     /**
  41      * Returns the Units for this performance counter
  42      */
  43     public Units getUnits();
  44 
  45     /**
  46      * Returns the Variability for this performance counter
  47      */
  48     public Variability getVariability();
  49 
  50     /**
  51      * Returns true if this performance counter is a vector
  52      */
  53     public boolean isVector();
  54 
  55     /**
  56      * Returns the length of the vector
  57      */
  58     public int getVectorLength();
  59 
  60     /**
  61      * Returns an Object that encapsulates the data value of this counter
  62      */
  63     public Object getValue();
  64 
  65     /**
  66      * Returns {@code true} if this counter is an internal counter.
  67      */
  68     public boolean isInternal();
  69 
  70     /**
  71      * Return the flags associated with the counter.
  72      */
  73     public int getFlags();
  74 }