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Java > Open Source Codes > com > quadcap > jni > Stat


1 package com.quadcap.jni;
2
3 /* Copyright 2000 - 2003 Quadcap Software. All rights reserved.
4  *
5  * This software is distributed under the Quadcap Free Software License.
6  * This software may be used or modified for any purpose, personal or
7  * commercial. Open Source redistributions are permitted. Commercial
8  * redistribution of larger works derived from, or works which bundle
9  * this software requires a "Commercial Redistribution License"; see
10  * http://www.quadcap.com/purchase.
11  *
12  * Redistributions qualify as "Open Source" under one of the following terms:
13  *
14  * Redistributions are made at no charge beyond the reasonable cost of
15  * materials and delivery.
16  *
17  * Redistributions are accompanied by a copy of the Source Code or by an
18  * irrevocable offer to provide a copy of the Source Code for up to three
19  * years at the cost of materials and delivery. Such redistributions
20  * must allow further use, modification, and redistribution of the Source
21  * Code under substantially the same terms as this license.
22  *
23  * Redistributions of source code must retain the copyright notices as they
24  * appear in each source code file, these license terms, and the
25  * disclaimer/limitation of liability set forth as paragraph 6 below.
26  *
27  * Redistributions in binary form must reproduce this Copyright Notice,
28  * these license terms, and the disclaimer/limitation of liability set
29  * forth as paragraph 6 below, in the documentation and/or other materials
30  * provided with the distribution.
31  *
32  * The Software is provided on an "AS IS" basis. No warranty is
33  * provided that the Software is free of defects, or fit for a
34  * particular purpose.
35  *
36  * Limitation of Liability. Quadcap Software shall not be liable
37  * for any damages suffered by the Licensee or any third party resulting
38  * from use of the Software.
39  */
40
41 import java.util.HashMap JavaDoc;
42
43 /**
44  * A simple statistics object
45  *
46  * @author Stan Bailes
47  */
48 public class Stat {
49     HashMap JavaDoc prev = new HashMap JavaDoc();
50     String JavaDoc name;
51     double max = Double.MIN_VALUE;
52     double min = Double.MAX_VALUE;
53     double sum = 0;
54 // double sumsq = 0;
55 long count = 0;
56
57     public Stat(String JavaDoc s) { name = s; }
58     
59     public void add(double d) {
60         if (d > max) max = d;
61         if (d < min) min = d;
62         sum += d;
63 // sumsq += (d * d);
64 count++;
65     }
66
67     /**
68      * Return the arithmetic mean (the "average") of the sample
69      */
70     public final double getMean() {
71         if (count == 0) return 0;
72         return sum / (double)count;
73     }
74
75     /**
76      * Throw out the high and the low before computing the average.
77      */
78     public double getAdjustedMean() {
79         if (count <= 2) return getMean();
80         return ((sum - max) - min) / (count - 2);
81     }
82
83     public final long getCount() { return count; }
84
85     public double getMin() { return min; }
86     public double getMax() { return max; }
87
88     public String JavaDoc getName() { return name; }
89
90     public void setName(String JavaDoc name) {
91         this.name = name;
92     }
93
94     public double getTotal() { return sum; }
95
96     public void addPrev(String JavaDoc s) {
97         Long JavaDoc x = (Long JavaDoc)prev.get(s);
98         if (x == null) x = new Long JavaDoc(1);
99         else x = new Long JavaDoc(x.longValue() + 1);
100         prev.put(s, x);
101     }
102
103     public String JavaDoc toString() {
104         return "[" + name + "] (" + prev + ")";
105     }
106 }
107
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